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Littérature scientifique sur le sujet « Titanium-doping »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Titanium-doping"

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Mogal, Sajid I., Manish Mishra, Vimal G. Gandhi et Rajesh J. Tayade. « Metal Doped Titanium Dioxide : Synthesis and Effect of Metal Ions on Physico-Chemical and Photocatalytic Properties ». Materials Science Forum 734 (décembre 2012) : 364–78. http://dx.doi.org/10.4028/www.scientific.net/msf.734.364.

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Titanium dioxide (Titania; TiO2) is one of the most widely used metal oxide semiconductor in the field of photocatalysis for removal of pollutants. It has been noted that titanium dioxide is a research friendly material as its physico-chemical and catalytic properties can be easily altered as per specific application. Since many years, researchers have tried to modify the properties of titanium dioxide by means of doping with metals and non-metals to improve its performance for photocatalytic degradation (PCD) applications. The doping of various metal ions like Ag, Ni, Co, Au, Cu, V, Ru, Fe, La, Pt, Cr, Ce, etc. in titanium dioxide have been found to be influencing the band gap, surface area, particle size, thermal property, etc. and therefore the photocatalytic activity in PCD. Moreover, photocatalytic activity of doped titanium dioxide has been observed in visible light range (i.e., at wavelength >400 nm). In this review, different synthesis route for doping of metal ions in titanium dioxide have been emphasised. The effect of metal dopant on the structural, textural and photocatalytic properties of titanium dioxide has been reviewed.
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Fedorov, Sergei N., Vladimir Yuryevich Bazhin et Vladimir G. Povarov. « Doping Titanium Dioxide by Fluoride Ion ». Materials Science Forum 946 (février 2019) : 181–85. http://dx.doi.org/10.4028/www.scientific.net/msf.946.181.

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Titanium dioxide has a special feature: anatase, to rutile transformation which was considered in our investigations. It is especially important to keep anatase form of titanium dioxide for photocatalytic materials, different ceramics with tribo-chemical properties, self-cleaning coatings and self-sterilizing coatings. For that only one of the titanium dioxide forms is more suitable – anatase, which is more active but not stable, because it transforms to rutile during the time or with the temperature increase loses its activity. Different methods of stabilising anatase have been considered in the paper. Several doping agents have been determined and it was chosen fluorine ion to modify titanium dioxide. Stabilization of anatase is achieved by preparing the reaction mixture by a sol-gel method with hydrofluoric acid. It has shown thermodynamic data, results of experiment, temperatures of anatase to rutile transformation of non-doped and doped titanium dioxide, its X-Ray diffraction and TGA. It is proved that titanium dioxide doped by fluorine ion keeps anatase form till the temperature is more than 1000 °C.
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Hashim, Faiz, Khamim Ismail, Aizuddin Supee, Firdaus Omar, Zainatul Izzah Ab. Ghani, Ain Ajeerah Ramli et Syariffah Nurathirah Syed Yaacob. « Aluminum Doped Titanium Dioxide Thin Film for Perovskite Electron Transport Layer ». Malaysian Journal of Fundamental and Applied Sciences 18, no 5 (15 décembre 2022) : 550–57. http://dx.doi.org/10.11113/mjfas.v18n5.2555.

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Aluminum (Al) doped titanium dioxide thin film with different Al doping concentration (Al = 0 mol%, 1 mol%, 3 mol%, 5 mol% and 7 mol%) were deposited using solution spin coating technique and the effect of Al concentration on the structural, morphological and optical properties were examine. All samples were annealed at 450°C for 1 hour. XRD reveal that the films exhibits anatase crystal phase at (101) peak orientation. Based on the FESEM and AFM image it is found that, surface morphology of the film was significantly affected with different doping concentration. Al doped titanium dioxide with 3 mol% Al concentration shows the highest transmittance compared to others samples. Consequently, it is shown that different Al doping concentration plays vital roles in producing an optimum Al doped titanium dioxide thin films samples.
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Wu, Weihua, Long Zheng, Jianzhong Xue, Xiaoqin Zhu et Jiwei Zhai. « Crystallization properties and structural evolution of amorphous Ti-doped Sn20Sb80 thin layers induced by heating and irradiating ». Journal of Applied Physics 131, no 19 (21 mai 2022) : 195105. http://dx.doi.org/10.1063/5.0088791.

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Sb-rich Sn20Sb80 thin layers with different titanium components were comprehensively investigated in terms of the crystallization properties and structural characterization. The phase transition behaviors induced by heating and irradiating were obtained from in situ resistance and reflectivity measurement. After doping the titanium element, the phase transformation temperature and resistance enhance remarkably, meaning the better thermal stability and lower energy consumption of the Sn20Sb80 material. The structural analyses were characterized by x-ray diffraction, transmission electron microscopy, and Raman spectroscopy, respectively, proving that the foreign titanium atoms can block the crystallization process and reduce the grain size. All the results illustrate that doping suitable titanium will be a desirable technique to regulate the crystallization properties of the Sn20Sb80 material.
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Pratiwi, Vania Mitha, Agung Ari Wibowo, Widyastuti, Hariyati Purwaningsih et Fakhri Akbar Maulana. « Characterization of NASICON Structure Prepared with Titanium Dioxide Doping for NOx Gas Sensor Application ». Materials Science Forum 964 (juillet 2019) : 168–73. http://dx.doi.org/10.4028/www.scientific.net/msf.964.168.

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An alternative sensor that can be used to monitor Nitrogen Oxide (NOx) levels in the air is an electrochemical sensor type such as Sodium Super Ionic Conductor (NASICON). In this study titanium doping on zirconium was carried out to improve the electrical conductivity of NASICON. This material was synthesized using the solid state method by mixing sodium carbonate, silicon dioxide, zirconium oxide, ammonium dihydrogen phosphate, titanium dioxide and some anhydrous ethanol into the Ballmill for 12 hours, dried at 80 °C for 12 hours then calcined at 1125 °C for 12 hours with heating rate of 2 °C.min-1. Then the material was pressed at 160 MPa to produce pellets with diameter of 10 mm and the sintering process was carried out at 1175 °C for 12 hours at a speed of 1 °C.min-1. The doping of Titanium was varied from 0 to 6 mol%. The XRD characterization results indicate that the formed material phase was monoclinic phase and rhombohedral phase. The most optimal electrical conductivity of 5.897x10-5 S.cm-1 was obtained by Titanium doping of 6 mol%.
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Di Valentin, Cristiana, Gianfranco Pacchioni et Annabella Selloni. « Theory of Carbon Doping of Titanium Dioxide ». Chemistry of Materials 17, no 26 (décembre 2005) : 6656–65. http://dx.doi.org/10.1021/cm051921h.

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Jabbar, Basma Abbas, Khawla J. Tahir, Basheer M. Hussein, H. H. Obeed, Noor J. Ridha, Firas K. Mohamad Alosfur et Rajaa A. Madlol. « Investigations on the Nonlinear Optical Properties of Eu3+ : TiO2 Nanoparticles via Z-Scan Technique ». Materials Science Forum 1039 (20 juillet 2021) : 245–52. http://dx.doi.org/10.4028/www.scientific.net/msf.1039.245.

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Europium doped Titanium dioxide (TiO2) nanoparticles were prepared by Sol-Gel technique under varying condition to investigate the effects of Eu3 + doping on the optical properties of Titanium dioxide nanoparticles. The transmittance spectrum is clearly visible at wavelengths 394nm and 416nm, and is a result of electronic transitions of energy level of the Eu3 + ions. . The obtained composites for different doping concentration were analyzed by using Energy Dispersive X-ray Spectroscopy (EDS). The linear and nonlinear optical properties of the composite were studied using the Z-scan technique, and there was an increase in the nonlinear refractive index with an increase in the concentration of the Eu+3, where it reached its highest value, which is 3.01×10-10 at doping 2.3 while the linear absorption coefficient was an inverse proportion, where the highest value was at Pure titanium and it is 1.0296951×10-5 (cm/mw).
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Xu, Pei Yao, Xiao Xue Han et Sa Sa Ban. « Modification of Nano-Titanium Dioxide Film and Processing Experimental Study of Tannery Waste Water ». Advanced Materials Research 383-390 (novembre 2011) : 6391–95. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6391.

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This paper was prepared by liquid phase deposition of quartz sand load nanometer titanium dioxide film, in which quartz sand as the carrier, and to Fe3+,Zn2+ as doping on the membrane was modified. The initial value of pH is 6.7,in this condition, select the heating temperature, the doping ratio of Fe3+andZn2+ to design the orthogonal experiment. CODCr removal and pH value as the evaluate index, to deal with the real tannery wastewater, discussed when Fe3+,Zn2+ co-doping, the best doping ratio of them, the best technical conditions such as heat treatment temperature; and their affect on CODCr removal rate and pH value.Under the optimum conditions, confirmed by further study that Fe3+ doped titanium dioxide modified membrane absorption band red shifts, the utilization of solar is increased, the tannery wastewater which was treated by modified membrane, its biodegradability is greatly increased.
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Tuluk, Anton, Siddharth Joshi, Tadhg Mahon et Sybrand van der Zwaag. « Tuning piezoproperties of BiFeO3 ceramic by cobalt and titanium dual doping ». Journal of Applied Physics 131, no 21 (7 juin 2022) : 214104. http://dx.doi.org/10.1063/5.0091768.

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Bismuth ferrite is a potentially interesting lead-free piezoelectric material for use in high-temperature applications due to its high Curie temperature. However, the high coercive field and high leakage currents of pure BiFeO3 (BFO) prevent reaching its theoretical performance level. The classic approach to tailoring piezoceramic properties to their desired use conditions is the use of doping. In this work, we produce bulk BFO piezoceramic by the conventional sintering method with single element doping with cobalt (0.125–3 at. %) or titanium (1–5 at. %) and dual doping (Co and Ti added simultaneously). Cobalt doping reduces the required field for poling and also increases the leakage currents. Titanium doping reduces the leakage currents but destroys the piezoelectric properties as the coercive field strength cannot be reached. However, when both elements are used simultaneously at their appropriate levels (0.25 at. % each), a piezoelectric ceramic material is obtained, requiring a low field for full poling (9 kV/mm) and showing excellent room temperature performance such as a d33 = 40 pC/N, a dielectric constant in the region of 100 and dielectric losses less than 1%.
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Mungondori, Henry H., et Lilian Tichagwa. « Photo-Catalytic Activity of Carbon/Nitrogen Doped TiO2-SiO2 under UV and Visible Light Irradiation ». Materials Science Forum 734 (décembre 2012) : 226–36. http://dx.doi.org/10.4028/www.scientific.net/msf.734.226.

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The sol gel synthesis method was used to prepare carbon and nitrogen doped titanium dioxide (TiO2) photo-catalyst using titanium tetrachloride (TiCl4) as the precursor. Doping was carried out to modify the absorption band edge of titanium dioxide. To avert the problem associated with use of powder TiO2, the photo-catalyst was immobilized on glass support using tetraethyl orthosilicate (TEOS), which served as a binder and precursor for silicon dioxide (SiO2). The prepared photo-catalytic materials were characterized by FT-IR, XRD, TEM, BET and DRS. The photo-catalytic efficiency of titanium dioxide immobilized on glass support was evaluated using the degradation of methyl orange (MeO) and phenol red (PRed) under ultraviolet and visible light irradiation. Doping with carbon and nitrogen, and incorporation of silicon dioxide into the titanium dioxide matrix allowed utilization of visible light by the prepared TiO2-SiO2nanocomposites. Photo-degradation tests were carried out for doped and undoped photo-catalyst. An increased rate of photo-oxidation of methyl orange and phenol red was observed under visible light irradiation as compared to UV light irradiation.
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Thèses sur le sujet "Titanium-doping"

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McCavish, N. D. « Non-stoichiometric titanium dioxide ; ultra-thin film growth, doping and adsorption of metalorganics ». Thesis, University of Reading, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485371.

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Buzby, Scott Edward. « The effect of doping titanium dioxide nanoparticles on phase transformation, photocatalytic activity and anti-bacterial properties ». Access to citation, abstract and download form provided by ProQuest Information and Learning Company ; downloadable PDF file, 120 p, 2008. http://proquest.umi.com/pqdweb?did=1459918071&sid=9&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Yue, Junpei [Verfasser]. « Titanium-based anode materials for lithium ion batteries : crystallite size, porous structure and doping effects / Junpei Yue ». Gießen : Universitätsbibliothek, 2016. http://d-nb.info/1111425914/34.

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Sun, Qingbo. « Defect Design, Chemical Synthesis and Associated Properties of Multifunctional TiO2-Based Nanocrystals ». Phd thesis, Canberra, ACT : The Australian National University, 2017. http://hdl.handle.net/1885/139617.

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Local defect structures are significant to determine material properties since defects introduced into host materials would affect the local/average crystal environments and thus lead to a change of macroscopic physicochemical performances. The intentional design of specific local defects not only depends on the selected synthesis method and preparation process but also relies on the selected dopant or co-dopant ions. A deep understanding of the intrinsic relationships between local defect structures, chemical synthesis and associated properties is thought as one major framework of material genome plan. It also pushes the design, development and application of novel multifunctional materials. Based on local defect structural design coupled with new synthesis strategies, indium and niobium co-doped anatase titanium oxide nanocrystals are synthesized. It is experimentally demonstrated that the dual mechanisms of nucleation and diffusion doping are responsible for the synergistic incorporation of indium difficult-dopants and niobium easy-dopants, and theoretically evidenced that the local defect structures created by indium, niobium co-dopants, reduced titanium and oxygen vacancies are composed of defect clusters and defect pairs. These introduced local defect structures act as nucleation centres of baddeleyite- and lead oxide-like metastable polymorphic phases and induce an abnormal trans-regime structural transition of co-doped anatase titanium oxide nanocrystals under high pressure. Furthermore, these small co-doped nanocrystals can be used as raw materials to manufacture titania-based ceramic capacitors designed in terms of electron-pinned defect dipole mechanism. The sintering temperature is thus lowered to 1200 °C, which conquers the technological bottleneck using this material. To develop the third generation of high-efficient visible light catalysts, nitrogen and niobium co-doped anatase titania nanocrystals are synthesized. Experimental and theoretical investigations demonstrate that the formation of highly concentrated defect-pairs is key to significantly enhance visible light catalytic efficiency. In further combination of local defect structural design and the exploration of new synthesis strategies, anatase nanocrystals containing nitrogen and reduced titanium ions are synthesized. The formation of local defect clusters is demonstrated to play an important role on the obvious enhancement of Rhodamine B degradation efficiency under only visible light illumination. It is thus unveiled that a fundamental understanding of the functions of local defect structures and a well-controlled synthetic strategy are critical to develop highly efficient visible light catalysts with unprecedented photocatalytic performances. Through these systematic investigations, it is concluded that local defect structures generated by introduced co-dopants are complicated in strong-correlated titania systems and differ from case to case. A major difficulty to efficiently introduce difficult-dopant ions such as nitrogen and indium at high concentrations is solved. Two high-efficient visible light catalysts are achieved for environmental remediation by using the clean and renewable solar energy; and one raw material for manufacturing new ceramic capacitors and new metastable polymorphic phases is provided. The discussion on the doping mechanisms, the defect formation and their associated impacts on material performances will not only benefit the future development of physical chemistry, material science and defect chemistry, but also opens a new route to design novel multifunctional materials based on local defect structure design.
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Kumar, Sachin. « Gas Phase Oxidation of Dimethyl Sulfide by Titanium Dioxide Based Catalysts ». Miami University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=miami1081780904.

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GALLINO, FEDERICO. « A combined computational and experimental study of spectroscopic evidences by dopants and defects in semiconducting and insulating oxides ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2012. http://hdl.handle.net/10281/28403.

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The main objective and the major value of this work is to provide a combined setup of theoretical and experimental techniques to simulate and measure a number of properties altered and/or induced by defects in three representative and technologically relevant oxides: zinc oxide (ZnO), zirconium dioxide (ZrO2) and magnesium oxide (MgO). Zinc oxide and zirconium dioxide are wide-gap semiconductors with a vast set of technological applications generally related to the inclusion of defects and impurities and spanning from optoelectronics to spintronics devices and photocatalysis. They are the subjects of Part II and Part III, respectively. A detailed description of their structure and chemical-physical properties is provided in the respective background sections. Part II deals with the main subject of this work: bulk and surface zinc oxide properties. After synthesis, ZnO commonly presents n-type conductivity and in Chapter 3 some of the most common donor defects (specifically: hydrogen interstitial and substitutional to oxygen, zinc interstitial and oxygen vacancy) have been investigated in terms of thermodynamic and optical transition energy levels. The good agreement with existing experimental data provides a powerful validation of the computational method presented in Sec. 2.1.5.1. In Chapter 4 copper doping of ZnO has been analyzed under different perspectives, spanning from the presence of donor and acceptor states, to magnetic interactions, to cluster tendency and to the interaction with oxygen vacancies. In particular, in conjunction with HREELS experiments, for the first time the inclusion of copper donor impurities in bulk ZnO has been observed which, on the basis of our calculations, we have assigned to interstitial copper species. In Chapter 5, the most promising shallow acceptor candidate for p-type doping of ZnO, i.e. nitrogen substitutional to oxygen, is investigated. First, nitrogen has been observed in polycrystalline sample and characterized in terms of hyperfine and quadrupolar coupling constants through a combined EPR and theoretical study. Secondly, the nitrogen doping process has been analysed upon the sputtering with ammonia of the mixed-terminated ZnO (10 0) surface through TDS experiments. The effectiveness of the doping process and the fundamental role of post-treatment oxidation were proved. The defective states within the optical gap have been estimated using HREELS measurements with a 66 eV electron primary energy. The computation of the transition energy levels have then demonstrated that nitrogen acts as a deep acceptor species in ZnO, disappointing the hopes to achieve p-type conductivity through nitrogen-doping. In order to get more insight in the nitrogen doping mechanism, the reactivity of ZnO single crystal and powders towards ammonia has been addressed by a combined theoretical and HREEL and UHV-FTIR study, in Chapter 6. Different coverages have been considered and, while at low concentration only molecularly adsorbed species have been observed, at a full monolayer coverage the repulsive steric interactions between adsorbates have been shown to induce the formation of an ordered adlayer with (2 x 1) periodicity, presenting alternating molecular NH3 and singly deprotonated NH2 moieties adsorbed on cationic sites. Part III is focused on ZrO2, specifically the tetragonal polymorph which is commonly stabilized by impurities. In particular, here the interest is related to the titanium doping of the material, which was experimentally found to induce a large red shift of the optical absorption edge. In Chapter 7 we proposed a rationalization of this experimental observation based on the computation of the optical transition levels of Ti species. The possible interaction with oxygen vacancies has also been considered. In Part IV the nitrogen doping of MgO, recently proposed as potential route to achieve room temperature ferromagnetism has been investigated. This work was divided in two parts. In Chapter 8 the electronic structure and the spin properties of nitrogen impurities have been theoretically studied, considering also possible charge transfers with magnesium or oxygen vacancies. Finally, in Chapter 9 we show how a trapped N2‒ radical anion in the polycrystalline material has been identified and characterized through a combined EPR and DFT study.
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Steiner, James David. « Understanding and Controlling the Degradation of Nickel-rich Lithium-ion Layered Cathodes ». Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85281.

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Consumers across the world use lithium-ion batteries in some fashion in their everyday life. The growing demand for energy has led to batteries dying quicker than consumers want. Thus, there are calls for researchers to develop batteries that are longer lasting. However, the initial increase in battery life over the years has been from better engineering and not necessarily from making a better material for a battery. This thesis focuses on the understanding of the chemistry of the materials of a battery. Throughout the chapters, the research delves into the how and why materials with extra nickel degrade quickly. Then, it investigates a method of making these nickelrich materials last longer and how the chemistry within these materials are affected by the addition of a different metal. Overall, the findings indicate that the addition of titanium creates a more stable material because it mitigates the release of oxygen and prevents irreversible changes within the structure of the material. It determines that the chemistry behind the failings of nickel-rich lithium-ion batteries and a potential method for allowing the batteries to last longer. It also provides insight and guidance for potential future research of stabilization of lithium-ion materials.
Master of Science
Consumers across the world use lithium-ion batteries in some fashion in their everyday life. The growing demand for energy has led to batteries dying quicker than consumers want. Thus, there are calls for researchers to develop batteries that are longer lasting. However, the initial increase in battery life over the years has been from better engineering and not necessarily from making a better material for a battery. This thesis focuses on the understanding of the chemistry of the materials of a battery. Throughout the chapters, the research delves into the how and why materials with extra nickel degrade quickly. Then, it investigates a method of making these nickel-rich materials last longer and how the chemistry within these materials are affected by the addition of a different metal. Overall, the findings indicate that the addition of titanium creates a more stable material because it mitigates the release of oxygen and prevents irreversible changes within the structure of the material. It determines that the chemistry behind the failings of nickel-rich lithium-ion batteries and a potential method for allowing the batteries to last longer. It also provides insight and guidance for potential future research of stabilization of lithium-ion materials.
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Gönüllü, Yakup [Verfasser]. « Functionalization of titanium dioxide nanotubes by various doping methods to use as selective gas sensing and energy storage applications / Yakup Gönüllü ». München : Verlag Dr. Hut, 2013. http://d-nb.info/1037287150/34.

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Tokmakci, Tolga. « Preparation Of Boron-zirconium Co-doped Photocatalytic Titanium Dioxide Powder ». Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615401/index.pdf.

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A titanium dioxide powder co-doped with boron and zirconium was prepared by mechanical ball milling. Photocatalytic performance of the powder was evaluated by degradation of methylene blue (MB) solution under UV illumination. XRD patterns were refined by Rietveld analysis method to obtain accurate lattice parameters and position of the atoms in the crystal structure of TiO2. XRD analysis indicated that the B and/or Zr doped TiO2 powders composed of anatase and did not exhibit any additional phase. Rietveld analysis suggested that dopant B and Zr elements were successfully weaved into crystal structure and distorted the lattice of TiO2. The highest distortion was obtained by co-doping. SEM investigations confirmed that mechanical ball milling technique led to a decrease in particle size of TiO2 powder. XPS analysis revealed that dopant B and Zr atoms did not appear in any form of compound including Ti and O elements. Results of photocatalytic activity test suggested that boron and zirconium co-doped TiO2 particles exhibited a better visible light response and photocatalytic activity than that of mono element doped TiO2 (i.e. B-TiO2 and Zr-TiO2) and undoped TiO2 particles. A 20% improvement in photocatalytic activity of reference TiO2 powder (powder ball milled without dopant addition) was achieved by B and Zr co-doping. The enhanced photocatalytic activity is attributed to synergistic effects of B-Zr co-doping the lattice of TiO2 as well as particle size reduction.
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Duncan, Morris. « Surface and sensor studies of doped titanium dioxide ». Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365772.

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Chapitres de livres sur le sujet "Titanium-doping"

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Jagannathan, Krishnan, Sikirman Arman et Nerissa Mohamad Elvana. « Activation of Titanium Dioxide Under Visible-Light by Metal and Non-metal Doping ». Dans ICGSCE 2014, 273–79. Singapore : Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-505-1_32.

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Musa, M. Z., M. H. Mamat, N. Vasimalai, A. S. R. A. Subki, H. Hassan, M. F. Malek, M. Y. Ahmad et M. Rusop. « Recent Progress on Titanium Dioxide-Based Humidity Sensor : Structural Modification, Doping, and Composite Approach ». Dans Lecture Notes in Mechanical Engineering, 507–16. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2890-1_48.

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Abbasi, Summaira, Norani Muti Mohamed, Balbir Singh Mahinder Singh, Asad Mumtaz et Mohamed Shuaib Mohamed Saheed. « Effect of Nickel Doping on the Optical and Morphological Properties of Titanium Dioxide Nanotubes ». Dans Proceedings of the 6th International Conference on Fundamental and Applied Sciences, 423–30. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4513-6_37.

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Nikulin, A., A. Shikov, A. Vorobjova, N. Khlebova, O. Malafeeva, V. Pantsyrnyi, A. Silaev, N. Beliakov et M. Semin. « The Investigation of the Effect of Niobium Artificial Doping with Titanium on Nb3Sn Superconductors Properties ». Dans Advances in Cryogenic Engineering Materials, 1337–43. Boston, MA : Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9059-7_173.

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Martin, Marcela V., Orlando M. Alfano et María L. Satuf. « Titanium Dioxide Photocatalysts for Environmental Applications Metal-Doping with Cerium Ions for Visible Light Activation and Efficiency Improvement ». Dans Industrial Applications of Nanoparticles, 217–27. Boca Raton : CRC Press, 2023. http://dx.doi.org/10.1201/9781003183525-13.

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ul Haq, Atta, Muhammad Saeed, Samreen Gul Khan et Muhammad Ibrahim. « Photocatalytic Applications of Titanium Dioxide (TiO2) ». Dans Titanium Dioxide [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99598.

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Water pollution is one the fundamental problems that have got the serious concerns of the researchers. Water poluution arises due to a number of reasons including domestic, industrial, agricultural, scinec and technology. The textile industry is the main industry that releases the dyes contaminated wastewater to the environment. A varities of protocols have been attempeted for the removal of dyes from aqueous body. Photocatalysis is one of the effective techniques which offer opportunities to overcome the aqueous pollution caused by rapid industrialization and urbanization. The semiconductor metal oxides used as photocatalysts are capable to provide a sustainable and clean ecosystem due to the tunable physiochemical characteristics of semiconductor metal oxides. Titanium dioxide (TiO2) is one of the metal oxides that can be effectively employed as a photocatalyst in the abatement of aqueous pollution due to organic compounds. The catalytic performance of titanium dioxide depends on several parameters like its crystallinity, surface area, and morphology. Titanium dioxide has shown good performance in the different photocatalytic systems, however, the characteristics like wide band gap and low conductivity limit the photocatalytic performance of titanium dioxide. Various attempts have been made to improve the photocatalytic performance of titanium dioxide. Herein, we summarize the various attempts to improve the photocatalytic performance of titanium dioxide in the abatement of aqueous pollution. The attempts made for the improvement of photocatalytic performance of titanium dioxide include modifications in composition, doping of other metal, and formation of heterojunctions with other metal oxides.
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El Halya, Nabil, Karim Elouardi, Abdelwahed Chari, Abdeslam El Bouari, Jones Alami et Mouad Dahbi. « TiO2 Based Nanomaterials and Their Application as Anode for Rechargeable Lithium-Ion Batteries ». Dans Titanium Dioxide - Advances and Applications. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.99252.

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Titanium dioxide- (TiO2-) based nanomaterials have been widely adopted as active materials for photocatalysis, sensors, solar cells, and for energy storage and conversion devices, especially rechargeable lithium-ion batteries (LIBs), due to their excellent structural and cycling stability, high discharge voltage plateau (more than 1.7 V versus Li+/Li), high safety, environmental friendliness, and low cost. However, due to their relatively low theoretical capacity and electrical conductivity, their use in practical applications, i.e. anode materials for LIBs, is limited. Several strategies have been developed to improve the conductivity, the capacity, the cycling stability, and the rate capability of TiO2-based materials such as designing different nanostructures (1D, 2D, and 3D), Coating or combining TiO2 with carbonaceous materials, and selective doping with mono and heteroatoms. This chapter is devoted to the development of a simple and cost-efficient strategies for the preparation of TiO2 nanoparticles as anode material for lithium ion batteries (LIBs). These strategies consist of using the Sol–Gel method, with a sodium alginate biopolymer as a templating agent and studying the influence of calcination temperature and phosphorus doping on the structural, the morphological and the textural properties of TiO2 material. Moreover, the synthetized materials were tested electrochemically as anode material for lithium ion battery. TiO2 electrodes calcined at 300°C and 450°C have delivered a reversible capacity of 266 mAh g−1, 275 mAh g−1 with coulombic efficiencies of 70%, 75% during the first cycle under C/10 current rate, respectively. Besides, the phosphorus doped TiO2 electrodes were presented excellent lithium storage properties compared to the non-doped electrodes which can be attributed to the beneficial role of phosphorus doping to inhibit the growth of TiO2 nanoparticles during the synthesis process and provide a high electronic conductivity.
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yin, Shu, Qiwu Zhang, Fumio Saito et Tsugio Sato. « Synthesis of titanium dioxide-based, visible-light induced photocatalysts by mechanochemical doping ». Dans High-Energy Ball Milling, 304–30. Elsevier, 2010. http://dx.doi.org/10.1533/9781845699444.3.304.

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Parangi, Tarun, et Manish Kumar Mishra. « Titanium Dioxide as Energy Storage Material : A Review on Recent Advancement ». Dans Titanium Dioxide [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99254.

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With the increased attention on sustainable energy, a novel interest has been generated towards construction of energy storage materials and energy conversion devices at minimum environmental impact. Apart from the various potential applications of titanium dioxide (TiO2), a variety of TiO2 nanostructure (nanoparticles, nanorods, nanoneedles, nanowires, and nanotubes) are being studied as a promising materials in durable active battery materials. The specific features such as high safety, low cost, thermal and chemical stability, and moderate capacity of TiO2 nanomaterial made itself as a most interesting candidate for fulfilling the current demand and understanding the related challenges towards the preparation of effective energy storage system. Many more synthetic approaches have been adapted to design different nanostructures for improving the electronic conductivity of TiO2 by combining with other materials such as carbonaceous materials, conducting polymers, metal oxides etc. The combination can be done through incorporating and doping methods to synthesize TiO2-based anodic materials having more open channels and active sites for lithium and/or sodium ion transportation. The present chapter contained a broad literature and discussion on the synthetic approaches for TiO2-based anodic materials for enhancing the lithium ion batteries (LIBs) and sodium ion batteries (SIBs) performance. Based on lithium storage mechanism and role of anodic material, we could conclude on future exploitation development of titania and titania based materials as energy storage materials.
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Christine Almeida Silva, Anielle, Jerusa Maria de Oliveira, Kelen Talita Romão da Silva, Francisco Rubens Alves dos Santos, João Paulo Santos de Carvalho, Rose Kethelyn Souza Avelino, Eurípedes Alves da Silva Filho et al. « Fluorescent Markers : Proteins and Nanocrystals ». Dans Bioluminescence [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96675.

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This book chapter will comment on fluorescent reporter proteins and nanocrystals’ applicability as fluorescent markers. Fluorescent reporter proteins in the Drosophila model system offer a degree of specificity that allows monitoring cellular and biochemical phenomena in vivo, such as autophagy, mitophagy, and changes in the redox state of cells. Titanium dioxide (TiO2) nanocrystals (NCs) have several biological applications and emit in the ultraviolet, with doping of europium ions can be visualized in the red luminescence. Therefore, it is possible to monitor nanocrystals in biological systems using different emission channels. CdSe/CdS magic-sized quantum dots (MSQDs) show high luminescence stability in biological systems and can be bioconjugated with biological molecules. Therefore, this chapter will show exciting results of the group using fluorescent proteins and nanocrystals in biological systems.
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Actes de conférences sur le sujet "Titanium-doping"

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Savrun, Ender, Cetin Toy, William D. Scott et Daniel C. Harris. « Effect of titanium doping on the rhombohedral twinning of sapphire ». Dans AeroSense '99, sous la direction de Randal W. Tustison. SPIE, 1999. http://dx.doi.org/10.1117/12.354638.

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Clark, Evan, Yong X. Gan et Chao Xue. « Titanium Oxide Nanotubes Doped for Use in a Visible-Light Biophotofuel Cell ». Dans ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7255.

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Multiple metal and non-metal dopants were added to titanium oxide nanotubes to enhance the photosensitive behavior. Six elements including nitrogen, sulfur, zinc, copper, cobalt, and nickel were incorporated into titanium oxide as the dopants. The doped titanium oxide nanotubes were made into photosensitive anodes and placed in ethanol to form fuel cells. The open circuit voltage measurement results showed that after doping, all the specimens tested were allowed the absorption of visible light. However, the resulted in voltages were slightly less than of those obtained through ultraviolet light absorption tests. Among the transition metal doping elements and the non-metal elements, cobalt, nickel and zinc showed the most promise in improving the visible light absorption.
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Li, Zhu-Ying, Ya Zhao et Ye Liu. « Influence of doping with titanium dioxide on property of epoxy resin ». Dans 2016 International Conference on Advanced Materials and Energy Sustainability (AMES2016). WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813220393_0017.

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Vishwakarma, Ankit Kumar, et Lallan Yadav. « Effect of CdS doping on microstructural of titanium dioxide thin film ». Dans 3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0001108.

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Luo, Xiao, Tongyao Hao, Lin Yue, Gong Hong et Yu Lu. « Azithromycin Wastewater Treatment with La Doping Titanium Dioxide /Active Carbon Composites ». Dans 2015 4th International Conference on Sensors, Measurement and Intelligent Materials. Paris, France : Atlantis Press, 2016. http://dx.doi.org/10.2991/icsmim-15.2016.161.

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IMTIAZ, ASFANDYAR, ATTAULLAH SHAH, MASHHOOD AHMAD et SAIFULLAH AWAN. « Impact of Iron Doping on Structural and Optical Properties of Titanium dioxide ». Dans Sixth International Conference on Advances in Computing, Electronics and Communication - ACEC 2017. Institute of Research Engineers and Doctors, 2017. http://dx.doi.org/10.15224/978-1-63248-138-2-07.

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Mumtaz, Muhammad, M. Ahsan Mahmood, Sabih D. Khan, M. Aslam Zia, Mushtaq Ahmed et Izhar Ahmad. « Enhancement of optical properties of titanium dioxide with doping in THz regime ». Dans 2020 45th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). IEEE, 2020. http://dx.doi.org/10.1109/irmmw-thz46771.2020.9370557.

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Lotkov, A. I., A. L. Matveev, L. V. Artemyeva, S. N. Meysner, V. A. Matveeva et A. N. Kudryashov. « Influence of silicon doping of titanium nickelide near-surface layers on alloy cytocompatibility ». Dans PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2017 (AMHS’17). Author(s), 2017. http://dx.doi.org/10.1063/1.5013800.

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Saito, Jo, Atsushi Suzuki, Tsuyoshi Akiyama et Takeo Oku. « Doping effects of transition metal elements to titanium dioxide for perovskite solar cells ». Dans THE IRAGO CONFERENCE 2016 : 360 Degree Outlook on Critical Scientific and Technological Challenges for a Sustainable Society. Author(s), 2017. http://dx.doi.org/10.1063/1.4974792.

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Manoharan, C., M. Jothibas, S. Dhanapandian, G. Kiruthigaa et S. Johnson Jeyakumar. « Role of titanium doping on indium oxide thin films using spray pyrolysis techniques ». Dans 2013 International Conference on Advanced Nanomaterials and Emerging Engineering Technologies (ICANMEET). IEEE, 2013. http://dx.doi.org/10.1109/icanmeet.2013.6609310.

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