Gotowe bibliografie tematyczne / TiO2

Gotowa bibliografia na temat „TiO2”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 7 lipca 2024

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych

Wybierz rodzaj źródła:

Spis treści

Zobacz listy aktualnych artykułów, książek, rozpraw, streszczeń i innych źródeł naukowych na temat „TiO2”.

Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.

Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.

Artykuły w czasopismach na temat "TiO2"

1

Wang, Zhen, Qifeng Shu i Kuochih Chou. "Study on Structure Characteristics of B2O3 and TiO2-bearing F-Free Mold Flux by Raman Spectroscopy". High Temperature Materials and Processes 32, nr 3 (14.06.2013): 265–73. http://dx.doi.org/10.1515/htmp-2012-0137.

Pełny tekst źródła
Streszczenie:
AbstractStructure characteristics of fluoride-Free mold flux containing simultaneously B2O3 and TiO2 have been investigated by Raman spectroscopy in this work. Raman spectra for glass samples with different basicities, different contents of TiO2 and B2O3 were recorded during the experiments. According to the experiments results, increase of TiO2 content leads to the appearance of [TiO4] and [TiO6] structure groups, and [TiO4] becomes the main structure unit in the system. TiO2 produces a certain destructive effect on Si-O-Si network structure as well as large borate group and conducive to the formation of some other complex structure groups, such as (Si,Ti) coupling in sheet unit. It can be concluded that, with the increase of B2O3, the ratio of mixing of the Q0 structure unit and [TiO4] structural group decrease and the ratio of sheet structure unit increase, and there forms large borate group. Existence of B2O3 increases polymerization degree of the slag system. In addition, increasing basicity causes to the decrease of Q2 and sheet structure unit and increase of mixing of the Q0 structure unit and [TiO4] structural group, and weakening the large borate group. It could be concluded that the increase of basicity reduces the degree of polymerization of the system.
Style APA, Harvard, Vancouver, ISO itp.
2

Liu, Xiongzhang, Xixi Li, Xue Lei, Deping Zhang, Zhijun Liu, Xueyuan Long i Rongzhou Gong. "Research on dielectric and microwave absorbing properties of TiO2/TiB2/Thermoplastic polyurethanes (TPU) composite materials". Journal of Physics: Conference Series 2248, nr 1 (1.04.2022): 012012. http://dx.doi.org/10.1088/1742-6596/2248/1/012012.

Pełny tekst źródła
Streszczenie:
Abstract TiO2/TiB2 materials are prepared by the carbothermal method and high-temperature calcination. Further, the phase composition, microstructure, dielectric and electromagnetic (EM) wave absorption characteristics are investigated. The results display that the product is composed of TiO2, TiB2 and impurity phases. The complex permittivity increases at elevated TiO2/TiB2 loading and slowly decreases with rising frequency in 2-18 GHz. When the TiO2/TiB2 content is 45 wt%, the minimum reflection loss (RLmin ) reaches -43.12 dB at 11.68 GHz with a thickness of 1.9 mm. The effective absorption band (EAB, RL<-10 dB) can reach 3.68 GHz at 2.3 mm as the TiO2/TiB2 content is 30 wt%. The enhanced EM wave absorption owes to the strong polarization loss and high conductivity loss. It goes without saying that TiO2/TiB2 materials can acquire important breakthroughs in the development of novel EM wave absorbers with outstanding absorption loss, wider EAB and smaller thicknesses.
Style APA, Harvard, Vancouver, ISO itp.
3

Zhu, He Guo, Jin Min, Da Chu i Huan Wang. "Study on the Reaction Mechanism of (α-Al2O3+TiB2+TiC)/Al Composites Fabricated by Al-TiO2-B4C System". Advanced Materials Research 150-151 (październik 2010): 84–87. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.84.

Pełny tekst źródła
Streszczenie:
The composites (-Al2O3+TiB2+TiC)/Al has been fabricated by using exothermic dispersion synthesis. Thermodynamic analysis indicated that the reaction between the Al and TiO2 can spontaneously occur due to the negative Gibbs free energy of the Al-TiO2 reaction system. With the increase of B4C/TiO2 mole ratios, the exothermic peaks increase move to the higher temperature and the corresponding ignite temperatures also increase. The reaction results indicate that when the B4C/TiO2＝0, the reinforcements are composed of -Al2O3, Al3Ti, with the increase of B4C/TiO2, the amount of Al3Ti decreases and the TiC and TiB2 form simultaneously. When the B4C/TiO2 increases to 1/3, the Al3Ti almost disappear and the reinforcements of the composites are consisted of -Al2O3, TiC and TiB2.
Style APA, Harvard, Vancouver, ISO itp.
4

Kim, Sang-Cheol, Sung-Hong Hahn, Eui-Jung Kim, Chung-Woo Lee, Jong-Hyun Joo i Goo-Cheol Kim. "Characteristics of TiO2 and Ag/TiO2 optical thin film by Co-sputtering method". Korean Journal of Optics and Photonics 16, nr 2 (1.02.2005): 168–73. http://dx.doi.org/10.3807/kjop.2005.16.2.168.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

Zhu, De Gui, Hong Liang Sun, Yu Shu Wang i Liang Hui Wang. "Oxidation Behaviors of TiB2-TiCX and TiB2-TiCX/15SiC Ceramics". Advanced Materials Research 105-106 (kwiecień 2010): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.179.

Pełny tekst źródła
Streszczenie:
Fully dense samples of TiB2-TiCX and TiB2-TiCX/15SiC ceramic composites were fabricated by in-situ synthesis under hot isostatic pressing from TiH2, B4C and SiC powders. Their oxidized behaviors at different temperatures were tested. Optical micrograph studies and thermo-gravimetric analyses show that the highest effective temperature of oxidation resistance is 700°C for TiB2-TiCX, and 1100°C for TiB2-TiCX/15SiC. The weight gain of TiB2-TiCX/15SiC below 1100°C is quite low, and it rises up suddenly when the temperature reaches 1200°C. Thus, the highest effective temperature of oxidation resistance is 1100°C for TiB2-TiCX/15SiC. The oxidation dynamic curves of TiB2-TiCX/15SiC ceramics accord with the parabola’s law. The activation energy of TiB2-TiCx/15SiC (189.87kJ.mol-1) is higher than that of TiB2-TiCx (96.44kJ.mol-1). In the oxidation process of TiB2-TiCx/15SiC, TiB2 reacts with oxygen and generates TiO2 and B2O3 at first. A layer of whole homogeneous oxide film cannot be formed, in the mean time, the oxidation of TiC begins. When temperature goes up to 1000°C, TiC phase is totally oxidized. SiC is oxidized to SiO2 at about 900°C, Meanwhile, TiO2 forms denser film than B2O3, which grows and covers the surface of the material, and gives better property of oxidation resistance.
Style APA, Harvard, Vancouver, ISO itp.
6

Huang, Fei, Zheng Yi Fu, Ai Hua Yan, Tie Kun Jia, Wei Min Wang, Hao Wang, Yu Cheng Wang i Jin Yong Zhang. "Effect of Hydrogen Peroxide on TiB2-Based Materials". Advanced Materials Research 66 (kwiecień 2009): 222–25. http://dx.doi.org/10.4028/www.scientific.net/amr.66.222.

Pełny tekst źródła
Streszczenie:
TiO2/TiB2 heterostructures were successfully synthesized by a facile hydrothermal approach in an aqueous solution of hydrogen peroxide (H2O2). The influence of H2O2 on TiB2-based materials was systematically investigated using X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that TiB2 is prone to oxidize in the presence of H2O2. TiO2/TiB2 heterostructure which high-density anatase-TiO2 stand on the surface can be gained in the presence of H2O2 solvent and the final composition can be controlled by the temperature and time. The investigation may provide a path to further understand the chemical property of TiB2-based materials and synthesis method of heterostructure.
Style APA, Harvard, Vancouver, ISO itp.
7

Svec, Pavol, i L’ubomír Caplovic. "Microstructure and mechanical properties of b4c-tib2 composites reactive sintered from B4C + TiO2 precursors". Processing and Application of Ceramics 16, nr 4 (2022): 358–66. http://dx.doi.org/10.2298/pac2204358s.

Pełny tekst źródła
Streszczenie:
Ceramic composites consisting of a boron carbide (B4C) matrix and titanium diboride (TiB2) secondary phase were obtained by reactive sintering from boron carbide powder with 40 and 50wt.% of titanium dioxide (TiO2) additive. The same sintering temperature of 1850?C and pressure of 35MPa, but different sintering times from 15 to 60min, were applied during reactive hot pressing of the composites in vacuum. The effects of TiO2 content and sintering time on phase compositions, microstructures and mechanical properties of the composites were studied. The TiO2 additive enhanced densification of the B4C-TiB2 ceramic composites. Both Vickers hardness and the fracture toughness of the composites increased with prolongation of sintering time. The highest hardness of 29.8GPa was achieved for the composite with 29.6 vol.% of TiB2 obtained by sintering of the precursor with 40wt.% of TiO2 additive for 60min. The fracture toughness reached a maximum value of 7.5MPa?m1/2 for the composite containing 40.2 vol.% of TiB2, which was fabricated by reactive sintering of the precursor with 50wt.% of TiO2 additive for 60min.
Style APA, Harvard, Vancouver, ISO itp.
8

Gao, Ji Wei, Qian Hong Shen, Ming Fang, Ping Wang i Li Li. "Preparation and Investigation of TiO2 Sol Containing Nanometer Anatase Crystalline Grains". Key Engineering Materials 336-338 (kwiecień 2007): 2350–52. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.2350.

Pełny tekst źródła
Streszczenie:
TiO2 sol containing nano anatase crystalline grains was prepared using Ti(OC4H9)4 as a precursor in a water-excessive reaction system. The processes of hydrolytic-polymeric reactions and the structures of the products were analyzed. It was found that the -OC4H9 radicals previously linked to Ti atom in Ti (OC4H9) 4 molecular are broken, and there is no organic radicals linked to Ti atoms in the final sol. The structure of particles in the sol changes along with time from tetrahedral [TiO4] to octahedral [TiO6], with the coordination number changing from 3.14 to 5.18, accordingly. Therefore, the structure becomes closer to an anatase, which is octahedral [TiO6] with a coordination number of 6.0. Transmission electron microscope micrograph also reveals the foursquare projection shape of crystalline grains with a size of 200 nm in the sol. As the particles in the sol have a quasi anatase structure, the TiO2 sol can directly photodegrade Rhodamine B under Ultraviolet illumination with a rate of 62.35%.
Style APA, Harvard, Vancouver, ISO itp.
9

Gnedenkov, S. V., D. P. Opra, V. G. Kuryavyi, S. L. Sinebryukhov, A. Yu Ustinov i V. I. Sergienko. "Nanostructured TiO2–TiOF2 composite as anode material for Li-ion battery". Electrochemical Energetics 14, nr 2 (2014): 68–77. http://dx.doi.org/10.18500/1608-4039-2014-14-2-68-77.

Pełny tekst źródła
Streszczenie:
TiO2–TiOF2 composite has been synthesized in plasma by the unique method of pulsed high-voltage discharge due to the destruction of Ti electrodes and polytetrafluoroethylene wire. TiO2–TiOF2 features have been investigated by scanning electron microscopy, X-ray diffraction, infrared spectroscopy, energy-dispersive X-ray analysis, Raman spectroscopy, and X-ray photoelectron spectroscopy. It has been shown that composite with a porous surface morphology includes the nanocrystallites of sizes ranging from 40 to 200 nm. The average diameter of the pore is 3–5 nm. Electrochemical characterization of the nanostructured porous TiO2–TiOF2 composite was carried out in view of its application as an anode-active material for Li-ion battery. The initial high specific capacity of the composite is equal up to 1370 mAh g−1 at a rate of 20 mA g−1. It is higher (due to the TiO2 presence) in comparison with up-to-date TiOF2 anode materials. Galvanostatic charge–discharge cycling of the Li/TiO2–TiOF2 cell in the range of 3.0–0.005 V yields 205 mAh g−1 after 20 cycles.
Style APA, Harvard, Vancouver, ISO itp.
10

Chan, Chao Chin, Chean Cheng Su, Chien Chen Diao i Cheng Fu Yang. "Low Temperature Sintering (Ba1-xSrx)TiO3 Ceramics by Using CuO-TiO2 Mixture as Sintering Aid". Key Engineering Materials 336-338 (kwiecień 2007): 62–65. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.62.

Pełny tekst źródła
Streszczenie:
1wt% CuO-TiO2 (molar ratio, CuO/TiO2= 1) mixture is added as the liquid phase sintering aid to develop the sintering and dielectric characteristics of (Ba1-xSrx)TiO3 (x=0, 0.1, and 0.2) ceramics. The crystal characteristics of calcined (Ba1-xSrx)TiO3 powders and sintered (Ba1-xSrx)TiO3 ceramics are developed by using X-ray diffraction method. The calcined (Ba1-xSrx)TiO3 powders and 1050oC-sintered (Ba1-xSrx)TiO3 ceramics reveal a tetragonal or pseudo-cubic structure and the 1150oC-sintered(Ba1-xSrx)TiO3 ceramics reveal a tetragonal structure. Sintered at 1100oC, the (Ba1-xSrx)TiO3 ceramics present a porous structure; Sintered at 1150oC, the (Ba1-xSrx)TiO3 ceramics present a uniform growth. The grain size decreases with the increase of SrO content. In this study, the dielectric characteristics of CuO-TiO2 mixture-fluxed (Ba1-xSrx)TiO3 ceramics are also developed.
Style APA, Harvard, Vancouver, ISO itp.
Więcej źródeł

Rozprawy doktorskie na temat "TiO2"

1

Steele, Karl Christopher. "Evaluation of TiO2 and Ag-TiO2, CuO-TiO2 composite films for self-disinfection activity". Thesis, University of Salford, 2009. http://usir.salford.ac.uk/26923/.

Pełny tekst źródła
Streszczenie:
The removal or killing of microorganisms on surfaces is of concern in the health care setting, food preparation areas and general work environment. The use of TiO2 photosterilisation has been proposed as an alternative to chemical disinfection of surfaces as a means to reduce the need for increasingly concentrated and aggressive chemicals necessary to kill disinfectant-resistant organisms. The objective of this research was to evaluate the ability of photocatalytic oxidation to reduce bacterial and viral contaminants on surfaces coated with TiOa and Ag-TiC^, TiO2-Ag, Cu-TiC^, TiO2-Cu. There are no British Standards that cover evaluation of such surfaces. A method for evaluation of photocatalytic surfaces was therefore developed from BS EN 13697:2001 and used to evaluate the activities of a variety of catalytic surfaces coated with TiO2, Ag and Cu and multi-layers of Ag-TiO2,TiO2-Ag, Cu-TiO2,TiO2-Cu. The antimicrobial activities were found to be dependent on the nature of the coating. Highest killing activities were obtained with Ag and Cu alone but combinations of Ag or Cu with TiO2were more active than TiO2 alone and also retained some self- cleaning activity. The results showed that the developed method was adaptable for determination of the antimicrobial activity of coatings with a wide range of activities producing 100% killing of Escherichia coll in times from 3 min up to 4 h. The results showed that it was possible to produce self cleaning self disinfecting surfaces and that surfaces with TiO2 on top, although having reduced activity compared to Ag or Cu, were durable and may have applications in the prevention of transmission of infections on surfaces in a wide range of applications.
Style APA, Harvard, Vancouver, ISO itp.
2

Moya, Murilo Tomazini Munhoz. "Estudo dos catalisadores TlO2 P25 e TlO2 kronos ativados por luz solar para degradação de atrazina por meio de fotocatálise heterogênea". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-18072016-084707/.

Pełny tekst źródła
Streszczenie:
A atrazina (ATZ) é um herbicida utilizado em larga escala no Brasil de forma intensiva em culturas de cana-de-açúcar, milho e sorgo. A ATZ possui caráter persistente e recalcitrante, de forma que os tratamentos convencionais de efluentes não são capazes de removê-lo. Nesse contexto, os processos oxidativos avançados, como a fotocatálise heterogênea, têm se mostrado eficientes para remoção deste poluente. Este trabalho tem por objetivo avaliar o desempenho dos fotocatalisadores TiO2 P25 e C-TiO2 Kronos vlp 7000 modificado com carbono para a degradação do pesticida atrazina em solução aquosa, utilizando um reator fotoquímico com coletor parabólico composto irradiado por um simulador solar. Os catalisadores TiO2 P25 e C-TiO2 Kronos foram caracterizados por meio de difração de raios-X, espectroscopia de infravermelho, área superficial específica BET e análise de reflectância difusa. As concentrações de TiO2 P25 e C-TiO2 Kronos empregadas foram 500 e 100 mg L&-1, respectivamente. Os resultados obtidos mostraram significativa remoção de ATZ ao final de 120 minutos (100; 98; 98; 93; 86% para concentrações iniciais de ATZ de 1; 5; 10; 20 e 30 mg L-1, respectivamente) com emprego do catalisador TiO2 P25. No entanto, as análises de carbono orgânico total (COT) indicaram que não houve mineralização significativa da ATZ, com valores inferiores a 20% com o uso do TiO2 P25. Para o catalisador C-TiO2 Kronos não se obteve remoção importante da ATZ ao final de 120 minutos de experimento, quando comparado com o TiO2 P25. Neste caso, o catalisador C-TiO2 Kronos permitiu obter remoções do pesticida de 37; 35; 38; 39 e 45%, aproximadamente, para as concentrações iniciais de ATZ de 1; 5; 10; 20 e 30 mg L-1, respectivamente. Apesar disso, o catalisador C-TiO2 Kronos apresentou melhor desempenho em mineralizar a ATZ a CO2 e H2O em relação ao proporcionado pelo TiO2 P25, com aproximadamente 38% de mineralização. O modelo de Langmuir-Hinshelwood (LH) constitui uma aproximação adequada para a cinética de degradação da atrazina para ambos os catalisadores estudados, com valores de Kr e Kads iguais a 1,54 mg L-1 min-1 e 15,47 L mg-1, respectivamente, para o catalisador TiO2 P25 e de 1,34 mg L-1 min-1 e 132,95 L mg-1, respectivamente para o catalisador C-TiO2 Kronos vlp 7000.
Atrazine (ATZ) is a widely used herbicide in Brazil, where it is intensively applied in sugarcane, corn and sorghum cultivations. However, conventional wastewater treatments are not able to remove ATZ due to its persistent and recalcitrant properties. Advanced oxidation processes, such as heterogeneous photocatalysis, have been proved effective for the removal of this pollutant. This study aims to evaluate the performance of TiO2 P25 and carbon-modified TiO2 Kronos vlp 7000 photocatalysts in the degradation of ATZ in aqueous systems using a tubular photochemical reactor equipped with a compound parabolic collector (CPC) irradiated by simulated solar light. Catalysts TiO2 P25 and C-TiO2 Kronos were characterized by X-ray diffraction, infrared spectroscopy, BET analysis and diffuse reflectance analysis. The concentrations of TiO2 P25 and C-TiO2 Kronos were 500 and 100 mg L-1, respectively. For TiO2 P25, the results showed significant ATZ removals after 120 minutes of irradiation (100; 98; 98; 93; 86% for initial ATZ concentrations of 1; 5; 10; 20, and 30 mg L-1, respectively). In contrast, the total organic carbon (TOC) analyses indicated that no significant ATZ mineralization occurred, with values lower than 20% for TiO2 P25. In comparison with TiO2 P25, C-TiO2 was not able to completely remove ATZ at the end of 120 minutes of irradition. In this case, pesticide removals of about 37; 35; 38; 39 and 45% were obtained for initial ATZ concentrations of 1; 5; 10; 20, and 30 mg L-1, respectively. Nevertheless, C-TiO2 Kronos showed better performance for ATZ mineralization to CO2 and H2O in comparison with TiO2 P25, with approximately 38% total carbon organic removal. The Langmuir-Hinshelwood (LH) model was shown to be an appropriate approximation for the degradation kinetics of atrazine for both catalysts, with values of Kr and Kads equal to 1.54 mg L-1 min-1 and 15.47 mg L-1, respectively, for the P25 TiO2 and 1.34 mg L-1 min-1 and 132.95 mg L-1, respectively, for C-TiO2 Kronos vlp 7000.
Style APA, Harvard, Vancouver, ISO itp.
3

Ghori, Muhammad Zubair [Verfasser]. "Synthesis and Functional Applications of Highly Photocatalytic TiO2 Based Surfaces: Al/TiO2 and Au/TiO2 Hybrid Structures / Muhammad Zubair Ghori". Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1164443909/34.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Andrianainarivelo, Mahandrimanana. "Homogénéité d'oxydes mixtes SiO2-ZrO2, SiO2-TiO2, TiO2-ZrO2, Al2O3-TiO2 et Al2O3-SiO2 préparés par sol-gel non hydrolytiques". Montpellier 2, 1996. http://www.theses.fr/1996MON20077.

Pełny tekst źródła
Streszczenie:
Dans ce travail, nous avons prepare des oxydes mixtes: sio#2-zro#2, sio#2-tio#2, tio#2-zro#2, al#2o#3-tio#2 et al#2o#3-sio#2 par un procede sol-gel non hydrolytique base sur la condensation des chlorures metalliques et les alcoxydes metalliques ou entre des chlorures metalliques et des donneurs d'oxygene tels que les ethers. Les rendements en oxydes obtenus apres elimination des groupements organiques residuels sont eleves. Edx et icp nous ont permis de montrer que la composition des oxydes finaux dependait directement de la stoechiometrie des precurseurs. L'homogeneite des gels a ete determinee par leur comportement a la cristallisation et par rmn du #2#9si et ir. Les gels bicomposants obtenus par la voie sol-gel non hydrolytique sont homogenes sauf lorsque le taux de titane est superieur a 8. 5% dans le systeme sio#2/tio#2
Style APA, Harvard, Vancouver, ISO itp.
5

POUILLEAU, JEROME. "Proprietes electrochimiques des systemes ti/tio2/electrolyte et ti/tio2/metal/electrolyte". Paris 6, 1996. http://www.theses.fr/1996PA066341.

Pełny tekst źródła
Streszczenie:
Dans la premiere partie de cet ouvrage, sont etudies les transferts electroniques pour les systemes ti/tio2/electrolyte. La vitesse de reaction de transfert de charge a l'interface est liee a l'epaisseur de la couche d'oxyde. Le comportement semiconducteur de type (n) des oxydes de titane permet d'utiliser les structures ti/tio2 pour des reactions cathodiques. La modification des structures par un depot de platine modifie considerablement la cinetique du transfert electronique avec un couple redox en solution. Cette cinetique est etudiee dans la seconde partie par spectroscopie d'impedance. Pour les deux systemes etudies, un processus de transfert electronique par effet tunnel via des etats intermediaires est propose. La derniere partie du memoire regroupe les resultats des analyses physico-chimiques (esca, rbs, diffraction des rayons x, afm, meb) qui ont ete employees pour caracteriser les interfaces (epaisseur et composition des couches,)
Style APA, Harvard, Vancouver, ISO itp.
6

Busayaporn, Wutthikrai. "TiO2(110) surface structure". Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/tio2110-surface-structure(9641eaab-818a-4928-a0b2-78312de050d5).html.

Pełny tekst źródła
Streszczenie:
In this thesis three studies of the geometric structure of the (110) surface of single crystal rutile TiO2 are presented. Firstly, quantitative low energy electron diffraction (LEED-IV) data acquired from TiO2(110)(1x1) are reanalysed to confirm the integrity of the previously reported optimized geometries by performing structural optimisation as a function of depth into the selvedge. The second study addresses the geometry of the x-linked (1x2) reconstruction of the same surface. Again, LEED-IV data are analysed to quantitatively determine the surface structure. Part of this effort involved substantial development of the code (SATLEED) employed for simulating the experimental data, to allow simultaneous optimisation of more than one surface termination. In contrast to recent scanning probe work, the analysis indicates that the surface consists of two differently relaxed Ti2O3 added rows. The last study concerns ab initio calculations of the structure of benzoate on TiO2(110)(1x1). Of particular interest is the impact of surface coverage on the orientation of the benzene ring. It is predicted that the benzene ring twists and tilts away from high symmetry with increasing coverage due to adsorbate-adsorbate interactions. No evidence is found to support the formation of benzoate dimers or trimers, as was concluded in earlier experimental work.
Style APA, Harvard, Vancouver, ISO itp.
7

Modesto, Junior Olayr. "Caracterização e aplicação fotocatalítica de compósitos óxidos TiO2/CuO, TiO2/ZnO E TiO2/ZrO2 sintetizados pelos processos Sol-gel e Poliol. /". Bauru, 2018. http://hdl.handle.net/11449/158268.

Pełny tekst źródła
Streszczenie:
Orientador: Dayse Iara dos Santos
Resumo: O desenvolvimento de materiais cerâmicos é um campo de pesquisa cujos resultados são extremamente promissores para aplicações tecnológicas. Particularmente, no caso dos materiais nanoestruturados baseados no óxido titânio, observa-se grande potencial de aplicação em dispositivos optoeletrônicos, bem como, para processos de fotocatálise, visto que apresenta um bandgap direto de 3,2 eV. Além disso, o aperfeiçoamento das propriedades ópticas, por meio da interação entre óxidos de diferentes bandas eletrônicas, têm sido estudado por muitos autores. Por esta razão, compósitos nanoestruturados formados de dois ou mais óxidos, cujas propriedades são distintas quando isolados, têm sido sintetizados juntos e caracterizados a fim de avaliar possíveis interações sinérgicas. Neste trabalho, foram preparados e caracterizados os compósitos TiO2/CuO, TiO2/ZnO e TiO2/ZrO2. As sínteses foram realizadas pelo método Sol-gel original e pelo método Poliol modificado, e ambos os processos se mostraram propícios para a obtenção de nanocompósitos e óxidos nanoparticulados. O método Poliol produziu compósitos formados de partículas micrométricas de dióxido de titânio revestidas do segundo óxido, enquanto o processo Sol-gel resultou em material constituído de agregados de nanocristais com alta mesoporosidade. Por meio da difração de raios X dos pós tratados gradualmente até 1000 °C observou-se que a formação e cristalização dos óxidos ocorrem em temperatura mais alta quando o material é resultante do ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The development of ceramic materials is a field of research whose results are extremely promising for technological applications. Particularly, in the case of nanostructured materials based on titanium oxide, there is a great potential for application in optoelectronic devices, as well as for photocatalysis processes, since it has a direct bandgap of 3.2 eV. In addition, the improvement of the optical properties through the interaction between oxides of different electronic bands has been studied by many authors. For this reason, nanostructured composites formed of two or more oxides, whose properties are distinct when isolated, have been synthesized together and characterized in order to evaluate possible synergistic interactions. In this work the TiO2 / CuO, TiO2 / ZnO and TiO2 / ZrO2 composites were prepared and characterized. The syntheses were carried out using the original Sol-gel method and the modified Polyol method, and both processes proved to be suitable for nanocomposites and nanoparticulate oxides. The polyol method produced composites formed of micrometric titanium dioxide particles coated with the second oxide, while the sol-gel process resulted in material composed of nanocrystalline aggregates with high mesoporosity. By X-ray diffraction of the powders gradually treated to 1000 °C it was observed that the formation and crystallization of the oxides occur at a higher temperature when the material is produced by the Sol-gel process. With the observation of the ... (Complete abstract click electronic access below)
Doutor
Style APA, Harvard, Vancouver, ISO itp.
8

Inagaki, Camila Suemi. "Síntese, caracterização e propriedades fotocatalíticas dos nanocompósitos SiO2/TiO2 e SiO2/TiO2/ZnO". Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Química, 2014. http://www.bibliotecadigital.uel.br/document/?code=vtls000193784.

Pełny tekst źródła
Streszczenie:
Este trabalho relata a preparação dos materiais nanoestruturados SiO2/TiO2 (ST) e SiO2/TiO2/ZnO (STZ) pelo método sol-gel em catálise ácida. Os materiais ST foram preparados em diferentes proporções de Si:Ti e Si:Ti:Zn. A caracterização dos materiais ST e STZ foi realizada por análises químicas e por diversas técnicas como: microscopia eletrônica de varredura, espectroscopia de energia dispersiva, medida da área superficial específica, refletância difusa, microscopia eletrônica de transmissão em alta resolução, difração de raios-X e espectroscopia Raman. Pela caracterização foi possível constatar que os materiais são nanocristalinos com domínios entre 4 e 5 nm e com característica estrutural microporosa. No material ST foi identificado apenas domínios cristalinos da fase anatase (TiO2), enquanto no material STZ as fases nanocristalinas identificadas foram: a anatase e o rutilo (TiO2), a wurtzita (ZnO), o espinélio invertido titanato de zinco (Zn2TiO4) e na superfície do material STZ com maiores quantidades de Ti e Zn a fase α-quartzo. As propriedades fotocatalíticas destes materiais nanocristalinos foram estudadas utilizando-se corantes têxteis catiônicos e a luz solar natural sem a utilização de oxidantes fortes adicionais. O material STZ na maior proporção Ti:Zn apresentou a maior eficiência fotocatalítica, sendo capaz de degradar totalmente o corante azul de metileno após 30 minutos, o corante amarelo ouro GL após 150 minutos e o corante azul royal GRL após 180 minutos de irradiação solar natural. A mineralização total das moléculas orgânicas em solução aquosa foi confirmada pela análise de carbono orgânico total que mostrou resultado negativo no extrato após a irradiação solar. A cinética de fotodegradação dos corantes têxteis segue o modelo matemático de primeira ordem aparente.
This work reports the preparation of the SiO2/ZnO (ST) and SiO2/TiO2/ZnO (STZ) nanocomposites by the sol-gel in acid catalysis method. The ST materials were prepared in different Si:Ti and SI:Ti:Zn proportions. The characterization of the ST and STZ materials was made with chemical analysis and with several techniques such as: scanning electron microscopy, energy-dispersive spectroscopy, measurement of the specific surface area, difuse reflectance, high-resolution transmission electron microscopy, X-ray diffraction and Raman spectroscopy. It was possible with the characterization to verify that the materials are nanocrystalline with domains between 4 and 5 nm and with a microporous structural characteristic. In the ST material only crystalline domains of the anatase phase (TiO2) were identified, while in the STZ material the nanocrystalline phases identified were: anatase and rutile (TiO2), wurtzite (ZnO), the inverted zinc titanate spinel (Zn2TiO4) and in the surface of the STZ material with greater quantities of Ti and Zn in α-quartz phase. The photocatalytical properties of these nanocrystalline materials were studied using cationic textile dyes and natural sunlight without the use of additional strong oxidizers. The STZ material in the greater Ti:Zn proportion presented the greatest photocatalytical efficiency, being capable of completely degrade the methylene blue dye after 30 minutes, the yellow gold GL dye after 150 minutes and the royal blue GRL after 180 minutes of natural sunlight irradiation. The total mineralization of the organic molecules in aqueous solution was confirmed by the total organic carbon analysis which showed negative results in the extract after solar irradiation. The photodegradation kinetics of the textile dyes follows the mathematical model of apparent first order.
Style APA, Harvard, Vancouver, ISO itp.
9

Madian, Mahmoud. "Fabrication and characterization of highly-ordered TiO2-CoO, CNTs@TiO2-CoO and TiO2-SnO2 nanotubes as novel anode materials in lithium ion batteries". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232646.

Pełny tekst źródła
Streszczenie:
Developed rechargeable batteries are urgently required to make more efficient use of renewable energy sources to support our modern way of life. Among all battery types, lithium batteries have attracted the most attention because of the high energy density (both gravimetric and volumetric), long cycle life, reasonable production cost and the ease of manufacturing flexible designs. Indeed, electrode material characteristics need to be improved urgently to fulfil the requirements for high performance lithium ion batteries. TiO2-based anodes are highly promising materials for LIBs to replace carbon due to fast lithium insertion/extraction kinetics, environmentally-friendly behavior, low cost and low volume change (less than 4%) therewith, high structural stability as well as improved safety issues are obtained. Nevertheless, the low ionic and electric conductivity (≈ 10−12 S m−1) of TiO2 represent the main challenge. In short, the present work aims at developing, optimization and construction of novel anode materials for lithium ion batteries using materials that are stable, abundant and environmentally friendly. Herein, both of two-phase Ti80Co20 and single phase Ti-Sn alloys (with different Sn contents of 1 to 10 at.%) were used to fabricate highly ordered, vertically oriented and dimension-controlled 1D nanotubes of mixed transition metal oxides (TiO2-CoO and TiO2-SnO2) via a straight-forward anodic oxidation step in organic electrolytes containing NH4F. Surface morphology and current density for the initial nanotube formation are found to be dependent on the crystal structure of the alloy phases. Various characterization tools such as SEM, EDXS, TEM, XPS and Raman spectroscopy were used to characterize the grown nanotube films. The results reveal the successful formation of mixed TiO2-CoO and TiO2-SnO2 nanotubes under the selected voltage ranges. The as-formed nanotubes are amorphous and their dimensions are precisely controlled by tuning the formation voltage. The electrochemical performance of the grown nanotubes was evaluated against a Li/Li+ electrode at different current densities. The results revealed that TiO2-CoO nanotubes prepared at 60 V exhibited the highest areal capacity of ~ 600 µAh cm–2 (i.e. 315 mAh g–1) at a current density of 10 µA cm–2. At higher current densities TiO2-CoO nanotubes showed nearly doubled lithium ion intercalation and a coulombic efficiency of 96 % after 100 cycles compared to lower effective TiO2 nanotubes prepared under identical conditions. To further improve the electrochemical performance of the TiO2-CoO nanotubes, a novel ternary carbon nanotubes (CNTs)@TiO2-CoO nanotubes composite was fabricated by a two-step synthesis method. The preparation includes an initial anodic fabrication of well-ordered TiO2-CoO NTs from a Ti-Co alloy, followed by growing of CNTs horizontally on the top of the oxide films using a simple spray pyrolysis technique. The unique 1D structure of such a hybrid nanostructure with the inclusion of CNTs demonstrates significantly enhanced areal capacity and rate performances compared to pure TiO2 and TiO2-CoO NTs without CNTs tested under identical conditions. The findings reveal that CNTs provide a highly conductive network that improves Li+ ion diffusivity promoting a strongly favored lithium insertion into the TiO2-CoO NT framework, and hence results in high capacity and extremely reproducible high rate capability. On the other hand, the results demonstrate that TiO2-SnO2 nanotubes prepared at 40 V on a Ti-Sn alloy with 1 at.% Sn display an average 1.4 fold increase in areal capacity with excellent cycling stability over more than 400 cycles compared to the pure TiO2 nanotubes fabricated and tested under identical conditions. The thesis is organized as follows: Chapter 1: General introduction, in which the common situation of energy demand, along with the importance of lithium ion batteries in renewable energy systems and portable devices are discussed. A brief introduction to TiO2-based anode in lithium ion batteries and the genera strategies for developing TiO2 anodes are also presented. The scope of this thesis as well as the main tasks are summarized. Chapter 2: The basic concepts of lithium ion batteries with an overview about their main components are discussed, including a brief information about the anode materials and the crystal structure of TiO2 anode. A detailed review for TiO2 nanomaterials for LIBs including the fabrication methods and the electrochemical performance of various TiO2 nanostructures (nanoparticles, nanorods, nanoneedles, nanowires and nanotubes) as well as porousTiO2 nanostructures is presented. The fabrication of TiO2 nanotubes by anodic oxidation, along with the growth mechanism are highlighted. The factors affecting the electrochemical performance of anodically fabricated pure TiO2, TiO2/carbon composites and TiO2-mixed with another metal oxide are reviewed. Chapter 3: In this chapter, the synthesis of TiO2-CoO, (CNTs)@TiO2-CoO and TiO2-SnO2 nanotubes, along with the characterization techniques and the electrochemical basics and concepts are discussed. Chapter 4: Detailed results and discussion of synthesis, characterizations and the electrochemical performance of TiO2-CoO nanotubes and ternary (CNTs)@TiO2/CoO nanotube composites are presented. Chapter 5: Detailed results and discussion of synthesis, characterizations and the electrochemical performance of ternary (CNTs)@TiO2-CoO nanotube composites are explained. Chapter 6: Detailed results and discussion of synthesis, characterizations and the electrochemical performance of TiO2-SnO2 nanotubes are presented. Chapter 7: Summarizes the results presented in this work finishing with realistic conclusions, and highlights interesting work for the future
Um die zur Aufrechterhaltung unserer modernen Lebensweise unabdingbaren erneuerbaren Energiequellen effizient nutzen zu können, werden hochentwickelte wiederaufladbare Batterien dringend benötigt. Lithium-Ionenbatterien gelten aufgrund ihrer hohen Energiedichte (sowohl gravimetrisch als auch volumetrisch), ihrer langen Lebensdauer, moderater Produktionskosten und aufgrund der Möglichkeit, vielfältige Konzepte einfach herstellen zu können, als vielversprechend. Dennoch müssen die Elektrodenmaterialien dringend verbessert werden, um den Ansprüchen an zukünftige hochentwickelte Lithium-Ionenbatterien gerecht zu werden. TiO2-basierte Anoden gelten aufgrund ihrer schnellen Lade- und Entladekinetik, ihres umweltfreundlichen Verhaltens und niedriger Kosten als aussichtsreiche Alternativen zu Kohlenstoffen. Durch die geringe Volumenänderung beim Lithiumeinbau (unter 4%) werden außerdem eine hohe strukturelle Stabilität und erhöhte Sicherheit gewährleistet. Die hauptsächlichen Herausforderungen stellen die niedrige ionische und elektrische Leitfähigkeit (≈ 10−12 S m−1) von TiO2 dar. Zusammengefasst liegt das Ziel der vorliegenden Arbeit in der Entwicklung, Optimierung und Herstellung neuartiger Anodenmaterialien für Lithium-Ionenbatterien unter Verwendung stabiler, verfügbarer und umweltfreundlicher Materialien. In dieser Arbeit wurden sowohl zweiphasiges Ti80Co20 und einphasige Ti-Sn-Legierungen (mit verschiedenen Sn-Gehalten zwischen 1 und 10 at-%) zur Herstellung hochgeordneter, vertikal orientierter eindimensionaler Nanoröhren aus gemischten Übergangsmetalloxiden (TiO2–CoO und TiO2–SnO2) mittels anodischer Oxidation in NH4F-haltigen organischen Elektrolyten genutzt. Dabei wurden Abhängigkeiten der Oberflächenmorphologie und der Stromdichte für die Bildung der Nanoröhren von der Kristallstruktur der zugrundeliegenden Legierung beobachtet. Vielfältige Methoden wie REM, EDXS, TEM, XPS und Ramanspektroskopie wurden genutzt, um die Nanoröhren zu charakterisieren. Die Ergebnisse zeigen, dass gemischte TiO2-CoO und TiO2-SnO2 Nanoröhren in den gewählten Spannungsfenstern erfolgreich gebildet werden konnten. Die so hergestellten Nanoröhren sind amorph und in ihren Dimensionen präzise durch die Wahl der Spannung einstellbar. Eine elektrochemische Beurteilung der Nanoröhren erfolgte durch Tests gegen eine Li/Li+-Elektrode bei veschiedenen Stromdichten. Die Resultate zeigen, dass TiO2-CoO-Nanoröhren, welche bei 60 V hergestellt wurden, die höchsten Flächenkapazitäten von ~ 600 µAh cm–2 (d.h. 315 mAh g–1) bei einer Stromdichte von 10 µA cm–2 aufweisen. Bei höheren Stromdichten zeigen TiO2-CoO-Nanoröhren nahezu verdoppelte Lithiuminterkalation und eine Coulomb-Effizienz von 96 % nach 100 Zyklen, verglichen mit weniger effektiven TiO2–Nanoröhren, welche unter identischen Bedingungen hergestellt wurden. Um die elektrochemischen Eigenschaften der TiO2-CoO-Nanoröhren weiter zu verbessern, wurde ein neuer Komposit aus Kohlenstoff-Nanoröhren und TiO2-CoO-Nanoröhren ((CNT)s@TiO2/CoO) durch eine zweistufige Synthese hergestellt. Die Herstellung beinhaltet zunächst die anodische Bildung geordneter TiO2/CoO-Nanoröhren, ausgehend von einer Ti-Co-Legierung, gefolgt von einem horizontalen Kohlenstoff-Nanoröhren-Wachstum auf dem Oxid mittels einer simplen Sprühpyrolyse. Die einzigartige 1D-Struktur einer solchen hybriden Nanostruktur mit eingebundenen CNTs zeigt deutlich erhöhte Flächenkapazitäten und Belastbarkeiten im Vergleich zu Nanoröhren aus TiO2 und TiO2/CoO-Nanoröhren ohne CNTs, die unter identischen Bedingungen getestet wurden. Die Ergebnisse zeigen, dass die CNTs ein hochleitfähiges Netzwerk bilden, welches die Diffusion von Lithium-Ionen und deren Einbau in die TiO2/CoO-Nanoröhren begünstigt und somit hohe Kapazitäten und reproduzierbare hohe Belastbarkeiten bewirkt. Außerdem zeigen die Resultate, dass TiO2-SnO2 Nanoröhren, welche bei 40 V auf einer Ti-Sn-Legierung mit 1 at.% Sn hergestellt wurden, im Mittel eine 1,4-fache Erhöhung der Flächenkapazität und eine exzellente Zyklenstabilität über mehr als 400 Zyklen, verglichen mit unter identischen Konditionen hergestellten und getesteten TiO2-Nanoröhren, zeigen. Die Arbeit ist wie folgt organisiert: Kapitel 1: Allgemeine Einführung, in der die Energienachfrage und die Bedeutung von Lithium-Ionenbatterien in erneuerbaren Energiesystemen und tragbaren Geräten diskutiert wird. Eine kurze Einleitung zu TiO2-basierten Anoden in Lithium-Ionenbatterien und allgemeine Strategien zur Entwicklung von TiO2-Anoden werden ebenfalls gezeigt. Das Ziel der Arbeit und hauptsächliche Aufgaben werden zusammengefasst. Kapitel 2: Das grundlegende Konzept der Lithium-Ionenbatterie mit einem Überblick über ihre Hauptkomponenten wird diskutiert. Dies beinhaltet auch eine kurze Darstellung der Anodenmaterialien und der Kristallstruktur von TiO2-Anoden. Eine detaillierte Übersicht über TiO2-Nanomaterialien für LIB, welche Herstellungsmethoden und die elektrochemische Performance verschiedener TiO2-Nanostrukturen (Nanopartikel, Nanostäbe, Nanonadeln, Nanodrähte und Nanoröhren) und poröser TiO2-Nanostrukturen beinhaltet, wird gezeigt. Die Bildung von TiO2-Nanoröhren durch anodische Oxidation und der Wachstumsmechanismus werden hervorgehoben. Faktoren, welche die elektrochemische Performance anodisch hergestellter TiO2-Materialien, TiO2/Kohlenstoff-Komposite und TiO2 als Gemisch mit anderen Metalloxiden beeinflussen, werden diskutiert. Kapitel 3: In diesem Kapitel werden die Synthese von TiO2-CoO, (CNTs)@TiO2/CoO und TiO2-SnO2-Nanoröhren, die Charakterisierungsmethoden, elektrochemische Grundlagen und Konzepte diskutiert. Kapitel 4: Detaillierte Resultate und die Diskussion der Synthese, Charakterisierung und der elektrochemischen Performance der TiO2-CoO- Nanoröhren und der ternären (CNTs)@TiO2/CoO-Nanoröhrenkomposite werden gezeigt. Kapitel 5: Detaillierte Resultate und die Diskussion der Synthese, Charakterisierung und der elektrochemischen Performance der der ternären (CNTs)@TiO2/CoO-Nanoröhrenkomposite werden diskutiert. Kapitel 6: Detaillierte Resultate und die Diskussion der Synthese, Charakterisierung und der elektrochemischen Performance von TiO2-SnO2-Nanoröhren werden gezeigt. Kapitel 7: Eine Zusammenfassung der Resultate, die in dieser Arbeit gezeigt wurden und Schlussfolgerungen, sowie interessante Ansatzpunkte für zukünftige Arbeiten werden präsentiert
Style APA, Harvard, Vancouver, ISO itp.
10

Oliveira, Cibele Aparecida de. "Propriedades fotocatalíticas do TiO2, β-Ag2MoO4 e da heteroestrutura TiO2/Ag2MoO4 : síntese e caracterização /". Araraquara, 2016. http://hdl.handle.net/11449/141460.

Pełny tekst źródła
Streszczenie:
Orientador: Elson Longo
Banca: Sonia Maria Zanetti
Banca: Elaine Cristina Paris
Banca: Fenelon Martinho Lima Pontes
Banca: Ademir Geraldo Cavallari Costalonga
Resumo: Neste trabalho propôs-se sintetizar partículas fotocatalisadoras de óxido de titânio (TiO2), beta molibdato de prata (β-Ag2MoO4) e a heteroestrutura TiO2/Ag2MoO4 para principal aplicação em fotocatálise. As partículas de TiO2 e a heteroestrutura foram sintetizadas utilizando o método solvotérmico assistido por micro-ondas (SAMO), enquanto que as partículas de β-Ag2MoO4 foram sintetizadas pelo método de co- precipitação. As sínteses foram realizadas a partir das soluções diluídas dos sais de partida, em diferentes solventes, tempos de reação e temperaturas para o controle do tamanho e forma dos cristais. A atividade fotocatalítica destes materiais foi analisada para a degradação dos corantes orgânicos alaranjado de metila e rodamina 6G sob irradiação com lâmpada ultravioleta (UV) de 254 nm. Foram realizadas caracterizações por difração de raios X (DRX), espectroscopia vibracional na região do infravermelho, fotoluminescência (FL) e medida de área de superfície específica (método BET). As morfologias dos cristais foram analisadas por intermédio de microscopia eletrônica de varredura de alta resolução e feixe de íon focalizado (FIB). As propriedades ópticas foram investigadas por espectroscopia na região do ultravioleta-visível (UV-vis). Os resultados de DRX mostram uma estrutura tetragonal para os pós de TiO2 e uma estrutura cúbica do tipo espinélio para as partículas de β-Ag2MoO4. Os espectros de infravermelho apresentaram bandas de absorção caraterísticas para cada material. ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This research proposed to synthesize photocatalytic particles of titanium dioxide (TiO2), beta silver molybdate (β-Ag2MoO4), and TiO2/Ag2MoO4 heterostructures for application in photocatalytic processes mainly. TiO2 particles and heterostructures were synthesized using microwave-assisted solvothermal (SAMO) method, while β- Ag2MoO4 particles were synthesized via co-precipitation method. All syntheses were made from the starting dilute salt solutions in different solvents, temperatures, and reaction times in order to control the size and the shape of the crystals. Photocatalytic activity of these materials was analyzed for degradation of the organic dyes methyl orange and rhodamine 6G under ultraviolet light (UV) irradiation at 254 nm. Characterizations were performed using X-ray diffraction (XRD), infrared vibrational spectroscopy, photoluminescence (PL) and specific surface area determination (BET method). The morphologies of the crystals were examined by high resolution scanning electron microscopy (HRSEM) and focused ion beam (FIB). The optical properties were investigated by UV-Vis spectroscopy. XRD results showed a tetragonal structure for the powders of TiO2, and a cubic spinel structure for β-Ag2MoO4 particles. Infrared spectra presented characteristic absorption bands for each material. PL bands indicated a broad emission with a maximum at wavelength of 605 nm, which corresponds to the emission in the yellow region for TiO2 powder. Regarding the β-Ag2MoO4 powders emis... (Complete abstract click electronic access below)
Doutor
Style APA, Harvard, Vancouver, ISO itp.
Więcej źródeł

Książki na temat "TiO2"

1

Grimes, Craig A., i Gopal K. Mor. TiO2 Nanotube Arrays. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

Hajjaji, Anouar, Mosbah Amlouk, Mounir Gaidi, Brahim Bessais i My Ali El Khakani. Chromium Doped TiO2 Sputtered Thin Films. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13353-9.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

Civiš, Svatopluk, Martin Ferus i Antonín Knížek. The Chemistry of CO2 and TiO2. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-24032-5.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Li, Ji-Guang. TiO2 nanocrystals: Synthesis and enhanced functionality. Hauppauge, N.Y: Nova Science Publishers, 2010.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

Grimes, Craig A. TiO2 nanotube arrays: Synthesis, properties, and applications. Dordrecht: Springer, 2009.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

McMurray, Trudy Angela. The photocatalytic oxidation of model pollutants on TiO2 films. [S.l: The author], 2004.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
7

Saitta, Patrick Thomas. DFT-Based Study of the First PCET of the OER on Large (001)-Exposing Anatase TiO2 Nanoparticles in a Water-Splitting Environment. [New York, N.Y.?]: [publisher not identified], 2020.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
8

1903-, Edgerton Harold Eugene, Muybridge Eadweard 1830-1904 i Birmingham Museums and Art Gallery., red. Tim[eo]tion. Stockport: Dewi Lewis in association with Birmingham Library Services and Birmingham Museums and Art Gallery, 2003.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

Participa(c)tion. Vitry-sur-Seine: MAC/VAL, 2014.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Jönsson, Bodil. Tio år senare: Tio tankar om tid. Stockholm: Bromberg, 2009.

Znajdź pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
Więcej źródeł

Części książek na temat "TiO2"

1

Irvine, William M. "TiO2". W Encyclopedia of Astrobiology, 2505–6. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_5119.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

Irvine, William M. "TiO2". W Encyclopedia of Astrobiology, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_5119-1.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

Grimes, Craig A., i Gopal K. Mor. "Fabrication of TiO2 Nanotube Arrays by Electrochemical Anodization: Four Synthesis Generations". W TiO2 Nanotube Arrays, 1–66. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5_1.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Grimes, Craig A., i Gopal K. Mor. "Material Properties of TiO2 Nanotube Arrays: Structural, Elemental, Mechanical, Optical and Electrical". W TiO2 Nanotube Arrays, 67–113. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5_2.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

Grimes, Craig A., i Gopal K. Mor. "TiO2 Nanotube Arrays: Application to Hydrogen Sensing". W TiO2 Nanotube Arrays, 115–47. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5_3.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

Grimes, Craig A., i Gopal K. Mor. "TiO2 Nanotube Arrays: Application to Photoelectrochemical Water Splitting". W TiO2 Nanotube Arrays, 149–216. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5_4.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
7

Grimes, Craig A., i Gopal K. Mor. "Dye-Sensitized and Bulk-Heterojunctions Solar Cells: TiO2 Nanotube Arrays as a Base Material". W TiO2 Nanotube Arrays, 217–83. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5_5.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
8

Grimes, Craig A., i Gopal K. Mor. "Use of TiO2 Nanotube Arrays for Biological Applications". W TiO2 Nanotube Arrays, 285–314. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5_6.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

Grimes, Craig A., i Gopal K. Mor. "Conclusions and New Directions". W TiO2 Nanotube Arrays, 315–45. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0068-5_7.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Hajjaji, Anouar, Mosbah Amlouk, Mounir Gaidi, Brahim Bessais i My Ali El Khakani. "TiO2 Photocatalysis". W Chromium Doped TiO2 Sputtered Thin Films, 75–84. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13353-9_5.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.

Streszczenia konferencji na temat "TiO2"

1

Zou, J., W. P. Ye, S. R. Dong, Z. Nie i X. D. Cheng. "Effect of TiO2 and TiB2 Compounds on the Microstructure and Infrared Emissivity of Spinel Ni-Cr Oxide Coatings Prepared by APS". W ITSC 2016, redaktorzy A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen i C. A. Widener. DVS Media GmbH, 2016. http://dx.doi.org/10.31399/asm.cp.itsc2016p1114.

Pełny tekst źródła
Streszczenie:
Abstract In this study, high-emissivity NiCr oxide coatings, one with TiO2 and one with TiB2 compounds, were deposited on stainless steel substrates by spray granulation and atmospheric plasma spraying. The main phases in both coatings are NiTiO3, spinel (NiCr2O4), and residual Cr2O3. The emissivity of the layer with TiO2 was found to be higher in the 2.5-8 μm range than that of the layer with TiB2, which is attributed to higher surface roughness and larger particle size. These results indicate that the NiCr oxide coatings with TiO2 compounds are more suitable for high-temperature IR applications.
Style APA, Harvard, Vancouver, ISO itp.
2

Dong Qi, Xian Wang, Fang Wang, Yongzhi Cheng, Yan Nie i Rongzhou Gong. "Spectrally selective TiO2/Ag/TiO2/(SiO2/TiO2)5 film for energy-efficient windows". W 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7734348.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

Stahr, C. C., L. M. Berger, S. Thiele i S. Saaro. "Thermally Sprayed TiO2-Cr2O3 Coatings with Multifunctional Properties". W ITSC2008, redaktorzy B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima i G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p1102.

Pełny tekst źródła
Streszczenie:
Abstract Thermally sprayed titanium suboxide (TiOx) coatings are widely used in industrial applications due to their good tribological properties and their electrical conductivity. These properties are mainly dependent on the amount of oxygen in the crystal lattice. Oxygen defects lead to the formation of so-called Magnéli phases. The range of applications is limited by the fact that TiOx tends to reoxidize in many service conditions, especially at elevated temperatures. Also, the extreme conditions in the flame or torch used in the thermal spray process lead to undefined phase changes and defects. In the TiO2-Cr2O3 system, Magnéli phases are also formed, but it is assumed that the properties do not change due to oxidation during spraying and subsequent use. This work shows the possibilities of the new coating materials. Powders with different TiO2 and Cr2O3 contents and prepared by different technologies were used for the investigation of coating properties. Experimental powders with defined phase compositions were prepared. The powders were thermally sprayed and the coatings investigated in terms of phase composition, microstructure, hardness, and abrasion wear resistance.
Style APA, Harvard, Vancouver, ISO itp.
4

Prasad, R. G. S. V., D. Basavaraju, K. N. Rao, C. S. Naveen, J. Endrino i A. R. Phani. "Nanostructured TiO2 and TiO2-Ag Antimicrobial Thin Films". W 2011 International Conference on Nanoscience, Technology and Societal Implications (NSTSI). IEEE, 2011. http://dx.doi.org/10.1109/nstsi.2011.6111808.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

Manseki, Kazuhiro, Katsuya Hisae, Takashi Sugiura i Saeid Vafaei. "CREATION OF POROUS ANATASE TIO2 FILMS USING TIO2 NANOFLUID". W 4th Thermal and Fluids Engineering Conference. Connecticut: Begellhouse, 2019. http://dx.doi.org/10.1615/tfec2019.emt.027585.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

Memarzadeh, K., J. A. Woollam i A. Belkind. "Spectroscopic Ellipsometric Characterization of TiO2/Ag/TiO2 Optical Coatings". W Optical Interference Coatings. Washington, D.C.: Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oic.1988.wc14.

Pełny tekst źródła
Streszczenie:
Optical constants (3000-800Å) and layer thicknesses in a three-layer glass/TiO2/Ag/TiO2 structure were determined using variable angle of incidence spectroscopic ellipsometry (VASE). Spectral characteristics due to plasmon effects were observed in n and k spectra for the thin silver layers.
Style APA, Harvard, Vancouver, ISO itp.
7

Yakopcic, Chris, Andrew Sarangan, Jian Gao, Tarek M. Taha, Guru Subramanyam i Stanley Rogers. "TiO2 memristor devices". W NAECON 2011 - IEEE National Aerospace and Electronics Conference. IEEE, 2011. http://dx.doi.org/10.1109/naecon.2011.6183085.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
8

Sieradzka, Karolina, Jaroslaw Domaradzki, Danuta Kaczmarek i Bartosz Michalec. "Investigation of electrical and optical properties of TiO2:Pd, TiO2:(Eu,Pd) and TiO2:(Tb,Pd) thin films". W 2008 International Students and Young Scientists Workshop "Photonics and Microsystems". IEEE, 2008. http://dx.doi.org/10.1109/stysw.2008.5164147.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

PONCZEK, M., T. FUJIMOTO i E. TOMAZ. "OXIDAÇÃO FOTOCATALÍTICA DE COMPOSTOS ORGÂNICOS SELECIONADOS COM CATALISADORES DE TiO2, TiO2/Pt E TiO2/Pd E LUZ UV". W XX Congresso Brasileiro de Engenharia Química. São Paulo: Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/chemeng-cobeq2014-0963-22085-163976.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Ye, F. X., A. Ohmori i C. J. Li. "The Photoresponse and Donor Concentration of Plasma Sprayed TiO2 and TiO2-ZnO Electrodes". W ITSC2004, redaktorzy Basil R. Marple i Christian Moreau. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.itsc2004p0922.

Pełny tekst źródła
Streszczenie:
Abstract The photoelectrochemical characteristics of plasma sprayed porous TiO2, TiO2-5%ZnO and TiO2-10%ZnO electrodes in 0.1N NaOH solution were studied through a three-electrode cell system. The microstructure, morphology and composition of the electrodes were analyzed using electron probe surface roughness analyzer (ERA-8800FE), scanning electron microscope (SEM) and X-ray diffraction. The results showed that the sprayed electrodes had a porous microstructure, which was affected by the plasma spraying parameters and composition of the powders. TiO2-ZnO electrodes consisted of anatase TiO2, rutile TiO2 and Zn2Ti3O8 phase. The photoresponse characteristics of the plasma sprayed electrodes were comparable to that of single crystal TiO2, but the breakdown voltage was approximate to 0.5V (vs. SCE). The short-circuit photocurrent density increased with a decrease of donor concentration, which was calculated according to Garner-Bulter model. For the lowest donor concentration of a TiO2-5%ZnO electrode prepared under the arc current of 600A, the short-circuit photocurrent density was approximately 0.4mA/cm2 higher than that of the TiO2 electrodes under 30mW/cm2 xenon light irradiation. The photocurrent density increased linearly with light intensity.
Style APA, Harvard, Vancouver, ISO itp.

Raporty organizacyjne na temat "TiO2"

1

Seliverstova, Evgeniya, Timur Serikov, Aigyl Sadykova i Niyazbek Ibrayev. Effect of Ag/TiO2 core/shell nanostructures on the photocatalytic activity of the TiO2/rGO nanocomposite material. Peeref, lipiec 2023. http://dx.doi.org/10.54985/peeref.2307p5991014.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
2

Reyes, Karla, Zachary Stephens i David Robinson. Composite WO3/TiO2 nanostructures for high electrochromic activity. Office of Scientific and Technical Information (OSTI), maj 2013. http://dx.doi.org/10.2172/1089995.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
3

LORIER, TROY. Evaluation of the TiO2 Limit for DWPF Glass. Office of Scientific and Technical Information (OSTI), marzec 2004. http://dx.doi.org/10.2172/822650.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
4

Li, Yiyang, Elliot Fuller i Albert Talin. Redox transistors based on TiO2 for analogue neuromorphic computing. Office of Scientific and Technical Information (OSTI), sierpień 2020. http://dx.doi.org/10.2172/1647700.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
5

Oldenburg, Steven, i John Holecek. Surface Modified TiO2 Obscurants for Increased Safety and Performance. Fort Belvoir, VA: Defense Technical Information Center, listopad 2012. http://dx.doi.org/10.21236/ada581972.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
6

Allen, Jan L., Ivan C. Lee i Jeff Wolfenstine. Biomimetic Approach to Solar Cells Based on TiO2 Nanotubes. Fort Belvoir, VA: Defense Technical Information Center, kwiecień 2008. http://dx.doi.org/10.21236/ada480572.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
7

Diebold, Ulrike. GROWTH, SURFACE CHARACTERIZATION, AND REACTIVITY OF TIO2 ANATASE FILMS-EPSCOR. Office of Scientific and Technical Information (OSTI), grudzień 2004. http://dx.doi.org/10.2172/835107.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
8

Martin, Joshua J., Mark H. Griep, Anit Giri, Samuel G. Hirsch, Victor Rodriguez-Santiago, Andres A. Bujanda, James E. McCauley i Shashi P. Karna. Tunable TiO2 Nanotube Arrays for Flexible Bio-Sensitized Solar Cells. Fort Belvoir, VA: Defense Technical Information Center, sierpień 2012. http://dx.doi.org/10.21236/ada568684.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
9

Yates, John T., i Jr. Do Electrons or Holes Activate Molecular O2 on TiO2 Surfaces? Fort Belvoir, VA: Defense Technical Information Center, listopad 2000. http://dx.doi.org/10.21236/ada391269.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
10

Yates, John T., i Jr. Solar Driven Photooxidation Chemistry on TiO2 Surfaces for Environmental Cleanup. Fort Belvoir, VA: Defense Technical Information Center, kwiecień 2001. http://dx.doi.org/10.21236/ada393788.

Pełny tekst źródła
Style APA, Harvard, Vancouver, ISO itp.
Możesz być także zainteresowany rozszerzonymi bibliografiami na temat „TiO2” dla poszczególnych typów źródeł:
Artykuły w czasopismach Rozprawy doktorskie Książki
Oferujemy zniżki na wszystkie plany premium dla autorów, których prace zostały uwzględnione w tematycznych zestawieniach literatury. Skontaktuj się z nami, aby uzyskać unikalny kod promocyjny!

Do bibliografii