Gotowe bibliografie tematyczne / Photocatalysts

Spis treści

Artykuły w czasopismach
Rozprawy doktorskie
Książki
Części książek
Streszczenia konferencji
Raporty organizacyjne

Gotowa bibliografia na temat „Photocatalysts”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 7 września 2023

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

Wybierz rodzaj źródła:

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

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 "Photocatalysts"

Chuaicham, Chitiphon, Jirawat Trakulmututa, Kaiqian Shu, Sulakshana Shenoy, Assadawoot Srikhaow, Li Zhang, Sathya Mohan, Karthikeyan Sekar i Keiko Sasaki. "Recent Clay-Based Photocatalysts for Wastewater Treatment". Separations 10, nr 2 (22.01.2023): 77. http://dx.doi.org/10.3390/separations10020077.

Pełny tekst źródła

Streszczenie:

Photocatalysis is a remarkable methodology that is popular and applied in different interdisciplinary research areas such as the degradation of hazardous organic contaminants in wastewater. In recent years, clay-based photocatalyst composites have attracted significant attention in the field of photocatalysis owing to their abundance, excellent light response ability, and stability. This review describes the combination of clay with focusing photocatalysts such as TiO2, g-C3N4, and Bi-based compounds for degrading organic pollutants in wastewater. Clay-based composites have more active surface sites, resulting in inhibited photocatalyst particle agglomeration. Moreover, clay enhances the creation of active radicals for organic pollutant degradation by separating photogenerated electrons and holes. Thus, the functions of clay in clay-based photocatalysts are not only to act as a template to inhibit the agglomeration of the main photocatalysts but also to suppress charge recombination, which may lengthen the electron–hole pair’s lifespan and boost degrading activity. Moreover, several types of clay-based photocatalysts, such as the clay type and main photocatalyst, were compared to understand the function of clay and the interaction of clay with the main photocatalyst. Thus, this study summarizes the recent clay-based photocatalysts for wastewater remediation and concludes that clay-based photocatalysts have considerable potential for low-cost, solar-powered environmental treatment.

Style APA, Harvard, Vancouver, ISO itp.

You, Wei. "Research Progresses and Development Trends of High-Efficacy Photocatalysts". Applied Mechanics and Materials 496-500 (styczeń 2014): 532–35. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.532.

Pełny tekst źródła

Streszczenie:

Progresses of research on high-efficacy photocatalyst were introduced in this paper. Firstly, efficiency-strengthening methods of TiO2-serie photocatalysts were summarized basing on collected literatures, including photosensitization, alloying, moreover, novel photocatalysis materials and technologies and probable development tendencies in the future were introduced, such as broad-spectrum photocatalysts, broad-energy and energy-sensitive catalysts and high-efficacy controllable high-power photocatalysis materials and equipments.

Style APA, Harvard, Vancouver, ISO itp.

Rocha, Rafael Lisandro P., Luzia Maria C. Honorio, Roosevelt Delano de S. Bezerra, Pollyana Trigueiro, Thiago Marinho Duarte, Maria Gardennia Fonseca, Edson C. Silva-Filho i Josy A. Osajima. "Light-Activated Hydroxyapatite Photocatalysts: New Environmentally-Friendly Materials to Mitigate Pollutants". Minerals 12, nr 5 (23.04.2022): 525. http://dx.doi.org/10.3390/min12050525.

Pełny tekst źródła

Streszczenie:

This review focuses on a reasoned search for articles to treat contaminated water using hydroxyapatite (HAp)-based compounds. In addition, the fundamentals of heterogeneous photocatalysis were considered, combined with parameters that affect the pollutants’ degradation using hydroxyapatite-based photocatalyst design and strategies of this photocatalyst, and the challenges of and perspectives on the development of these materials. Many critical applications have been analyzed to degrade dyes, drugs, and pesticides using HAp-based photocatalysts. This systematic review highlights the recent state-of-the-art advances that enable new paths and good-quality preparations of HAp-derived photocatalysts for photocatalysis.

Style APA, Harvard, Vancouver, ISO itp.

Teye, Godfred Kwesi, Jingyu Huang, Yi Li, Ke Li, Lei Chen i Williams Kweku Darkwah. "Photocatalytic Degradation of Sulfamethoxazole, Nitenpyram and Tetracycline by Composites of Core Shell g-C3N4@ZnO, and ZnO Defects in Aqueous Phase". Nanomaterials 11, nr 10 (4.10.2021): 2609. http://dx.doi.org/10.3390/nano11102609.

Pełny tekst źródła

Streszczenie:

The synthesis of photocatalysts with high charge separation and transfer efficiency are of immense significance in the process of using photocatalysis technology for wastewater treatment. In this study core shell g-C3N4@ZnO, and ZnO defects photocatalysts presented an improved morphology in its characterization using techniques such as SEM, DRS, PL, MS, EIS, and XRD, and enhanced photodegradation of sulfamethoxazole, Nitenpyram and Tetracycline. Different composites were obtained as confirmed by the various characterization techniques studied, including core shell g-C3N4@ZnO, and ZnO defects photocatalyst. The synthesized photocatalysts showed high visible light absorption efficiency within a range of ~655 to 420 nm. Core shell g-C3N4@ZnO, and ZnO defects photocatalysts demonstrated high photocatalytic activity ascribed to high load separation and transition as shown in PL, Photocurrent reaction and EIS. It is understandable that core shell g-C3N4@ZnO, and ZnO defects photocatalysts have been confirmed to be one of the ultimate promising entrants for photocatalyst scheming.

Style APA, Harvard, Vancouver, ISO itp.

Li, Xue, Ulla Simon, Maged F. Bekheet i Aleksander Gurlo. "Mineral-Supported Photocatalysts: A Review of Materials, Mechanisms and Environmental Applications". Energies 15, nr 15 (2.08.2022): 5607. http://dx.doi.org/10.3390/en15155607.

Pełny tekst źródła

Streszczenie:

Although they are of significant importance for environmental applications, the industrialization of photocatalytic techniques still faces many difficulties, and the most urgent concern is cost control. Natural minerals possess abundant chemical inertia and cost-efficiency, which is suitable for hybridizing with various effective photocatalysts. The use of natural minerals in photocatalytic systems can not only significantly decrease the pure photocatalyst dosage but can also produce a favorable synergistic effect between photocatalyst and mineral substrate. This review article discusses the current progress regarding the use of various mineral classes in photocatalytic applications. Owing to their unique structures, large surface area, and negatively charged surface, silicate minerals could enhance the adsorption capacity, reduce particle aggregation, and promote photogenerated electron-hole pair separation for hybrid photocatalysts. Moreover, controlling the morphology and structure properties of these materials could have a great influence on their light-harvesting ability and photocatalytic activity. Composed of silica and alumina or magnesia, some silicate minerals possess unique orderly organized porous or layered structures, which are proper templates to modify the photocatalyst framework. The non-silicate minerals (referred to carbonate and carbon-based minerals, sulfate, and sulfide minerals and other special minerals) can function not only as catalyst supports but also as photocatalysts after special modification due to their unique chemical formula and impurities. The dye-sensitized minerals, as another natural mineral application in photocatalysis, are proved to be superior photocatalysts for hydrogen evolution and wastewater treatment. This work aims to provide a complete research overview of the mineral-supported photocatalysts and summarizes the common synergistic effects between different mineral substrates and photocatalysts as well as to inspire more possibilities for natural mineral application in photocatalysis.

Style APA, Harvard, Vancouver, ISO itp.

Prakash, Jai. "Mechanistic Insights into Graphene Oxide Driven Photocatalysis as Co-Catalyst and Sole Catalyst in Degradation of Organic Dye Pollutants". Photochem 2, nr 3 (17.08.2022): 651–71. http://dx.doi.org/10.3390/photochem2030043.

Pełny tekst źródła

Streszczenie:

Photocatalysis is a promising route to utilize sunlight, which has been potentially used to solve energy as well as environmental problems with an emphasis on fundamental understanding and technological applications in society. Semiconductors are excellent photocatalysts but often show less efficient activities due to the fast recombination of photogenerated charge carriers and very slow kinetics of surface photochemical reactions. However, recent advancements show promising strategies to improve their photocatalytic activities, including surface modifications using suitable co-catalysts and the development of novel efficient photocatalysts. Graphene oxide (GO) is one of such nanomaterials which shows multifarious roles in photocatalysis with a great potential to act as an independent solar-driven sole photocatalyst. In this minireview, the photochemistry of GO has been discussed in view of its multifarious roles/mechanisms in improving the photocatalytic activity of metal oxide semiconductors, plasmonic nanomaterials, and also their nanocomposites. In addition, recent advancements and applications of such GO-based photocatalysts in photocatalytic degradation of organic dye pollutants, including engineering of GO as the sole photocatalyst, have been discussed. Furthermore, the challenges and future prospects for the development of GO-based photocatalysts are discussed.

Style APA, Harvard, Vancouver, ISO itp.

Thoda, Olga, Anastasia M. Moschovi, Konstantinos Miltiadis Sakkas, Ekaterini Polyzou i Iakovos Yakoumis. "Highly Active under VIS Light M/TiO2 Photocatalysts Prepared by Single-Step Synthesis". Applied Sciences 13, nr 11 (5.06.2023): 6858. http://dx.doi.org/10.3390/app13116858.

Pełny tekst źródła

Streszczenie:

A single-step impregnation approach is investigated as a synthetic route for photocatalyst synthesis active under visible light. The as-derived photocatalysts exhibited very high degradation rates towards methylene blue (MB) decolorization under visible light despite the high concentration of the initial MB solution concentration. The TiO2-based photocatalysts were prepared using nitrate precursor compounds for copper and silver; thus, Ag/TiO2 and Cu/TiO2 photocatalysts were prepared. The photocatalyst’s physicochemical properties were determined by XRF, BET, and XRD analysis. The metal nature of the titania substrate, the titania matrix effect, and the metal concentration parameters were studied, while the catalyst concentration in the MB initial solution was optimized.

Style APA, Harvard, Vancouver, ISO itp.

Gao, Lan, Elyes Nefzaoui, Frédéric Marty, Mazen Erfan, Stéphane Bastide, Yamin Leprince-Wang i Tarik Bourouina. "TiO2-Coated ZnO Nanowire Arrays: A Photocatalyst with Enhanced Chemical Corrosion Resistance". Catalysts 11, nr 11 (27.10.2021): 1289. http://dx.doi.org/10.3390/catal11111289.

Pełny tekst źródła

Streszczenie:

Photocatalysis is proven to be the most efficient and environmentally friendly method for the degradation of organic pollutants in water purification. To meet the requirement of large-scale water treatment, there are two important points: One is the lifetime and chemical stability of the photocatalyst material, especially in the complex and harsh aqueous conditions. The other is the ease of synthesis of such photocatalysts with specific nano-morphology. In this work, two common photocatalyst materials, zinc oxide (ZnO) and titanium dioxide (TiO2), are selected to form more sustainable photocatalysts with high chemical stability. This involves the combination of both TiO2 and ZnO in a two-step simple synthesis method. It appears advantageous to exploit the conformal deposition of atomic layer deposition (ALD) to achieve nanometer-thick TiO2 coating on ZnO nanowires (NWs) with a high aspect ratio, which are firmly anchored to a substrate and exhibit a large specific surface area. The high chemical stability of the ALD TiO2 coating has been investigated in detail and proven to be effective under both strong acid and strong alkaline aqueous solutions. In addition, photocatalysis experiments with organic dyes show that via this simple two-step synthesis method, the produced ZnO/TiO2 tandem photocatalysts does indeed exhibit improved chemical stability in a harsh environment, while allowing efficient photodegradation.

Style APA, Harvard, Vancouver, ISO itp.

Singh, Gurpinder, Manpreet Kaur Ubhi, Kiran Jeet, Chetan Singla i Manpreet Kaur. "A Review on Impacting Parameters for Photocatalytic Degradation of Organic Effluents by Ferrites and Their Nanocomposites". Processes 11, nr 6 (5.06.2023): 1727. http://dx.doi.org/10.3390/pr11061727.

Pełny tekst źródła

Streszczenie:

Traditional wastewater treatment methods, such as reverse osmosis, adsorption, desalination, and others, are outweighed by the photocatalytic degradation of organic pollutants. Ferrites are prominent photocatalysts due to their tunable band gaps, surface areas, and magnetic properties, which render photodegradation economical. Ferrites and their nanocomposites have been reported as promising visible light active photocatalysts. The photocatalytic system is heavily reliant on a number of factors that influence the photodegradation of organic effluents. This review demonstrates various parameters such as substrate concentration, pH of solution, photocatalyst quantity, photocatalyst surface area, metal and non-metal ion doping, light intensity, irradiation time, quenchers, etc. affecting the photocatalytic degradation of organic effluents by ferrite nanoparticles and their nanocomposites in detail. The photodegradation efficiency of the ferrite nanoparticles alters with the change in the value of pH of the solution, which further depends upon the nature of the pollutant used. A dose of the substrate and the photocatalyst must be optimized so as to attain better photodegradation efficiency. Photocatalysts with different surface areas change the amount of active sites, which in turn affects the degradation of pollutant and render it a crucial factor. In addition, the mechanism of the action of photocatalysis is elaborated in this review. Future research perspectives for the advancement of ferrites and their nanocomposites are deliberated in order to improve their use as photocatalysts.

Style APA, Harvard, Vancouver, ISO itp.

Kudo, Akihiko. "Photocatalysis and solar hydrogen production". Pure and Applied Chemistry 79, nr 11 (1.01.2007): 1917–27. http://dx.doi.org/10.1351/pac200779111917.

Pełny tekst źródła

Streszczenie:

Photocatalytic water splitting is a challenging reaction because it is an ultimate solution to energy and environmental issues. Recently, many new powdered photocatalysts for water splitting have been developed. For example, a NiO (0.2 wt %)/NaTaO3:La (2 %) photocatalyst with a 4.1-eV band gap showed high activity for water splitting into H2 and O2 with an apparent quantum yield of 56 % at 270 nm. Overall water splitting under visible light irradiation has been achieved by construction of a Z-scheme photocatalysis system employing visible-light-driven photocatalysts, Ru/SrTiO3:Rh and BiVO4 for H2 and O2 evolution, and an Fe3+/Fe2+ redox couple as an electron relay. Moreover, highly efficient sulfide photocatalysts for solar hydrogen production in the presence of electron donors were developed by making solid solutions of ZnS with AgInS2 and CuInS2 of narrow band gap semiconductors. Thus, the database of powdered photocatalysts for water splitting has become plentiful.

Style APA, Harvard, Vancouver, ISO itp.

Więcej źródeł

Rozprawy doktorskie na temat "Photocatalysts"

He, Jijiang. "Preparation and photocatalysis of graphite carbon nitride based photocatalysts". Thesis, Curtin University, 2015. http://hdl.handle.net/20.500.11937/521.

Pełny tekst źródła

Streszczenie:

The connection between ritual and the interior is interrogated through a theoretical framework integrating Van Gennep’s Rites of Passage Theory and Turner’s Theory of Liminality. A multi-faceted methodological framework is developed from the interrogation of the disciplinary edges of multiple methodologies, addressing the experiential, cultural and subjective dimensions of ritual. This new way of exploring the interior demonstrates how knowledge can be acquired from the body’s immersion in unfolding ritual situations, revealing elements of ritual and interior in relation to one another and the generation of new theories on the interior.

Style APA, Harvard, Vancouver, ISO itp.

Lee, Soo-Keun. "Laser photocatalysts". Thesis, Robert Gordon University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.344019.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Svoboda, Jiří. "Flavin-based photocatalysts". kostenfrei, 2007. http://www.opus-bayern.de/uni-regensburg/volltexte/2008/859/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Vaisman, Elena. "Characterization of composite photocatalysts". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0015/MQ49661.pdf.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Kent, Laura. "Photocatalysts for water purification". Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/850035/.

Pełny tekst źródła

Streszczenie:

Advanced water purification methods are required to answer the growing demand for clean water throughout the world. Current methods of removing the pollutants rely on moving the pollutants from one place to another rather than breaking them down. The use of advanced oxidative processes (AOPs) presents a highly effective opportunity to achieve the full mineralisation of pollutants without the added cost of regeneration methods. Photocatalysts, such as titanium dioxide and zinc oxide, can be used as AOPs when activated by electromagnetic radiation in the form of ultraviolet and visible light. To facilitate the activation with visible light, titanium dioxide doped with rare earth elements was produced via a sol gel method. Both single doped and co-doped systems were investigated with efficiency determined by the percentage of degraded methylene blue over 48 hours under ultraviolet filtered visible light. The incorporation of rare earth ions restricted the growth of the more active anatase phase and the method produced highly agglomerated, sintered nano particles which exhibited as micron sized particles. The highest methylene blue removal rate achieved in 48 hours for a single doped system was 70% for the 1 mol% yttrium doped titanium dioxide. This was improved further on inclusion of 1 mol% praseodymium which showed an 86% removal of methylene blue over the same time period. The coating of known up-converting phosphors with the successfully developed doped titanium dioxide was investigated. Yttrium silicate doped with praseodymium and lithium, was found to be the most successful known phosphor when used with the commercially available P25 titanium dioxide. When coated with the doped titanium dioxide shell at a 2:1 ratio of phosphor to titanium dioxide, a methylene blue degradation of 94% was reached. Initial tests on the coating of titanium dioxide with the known up-converting phosphor showed that methylene blue was absorbed rather than broken down so was not developed further. An investigation into the incorporation of zinc oxide, both pure and doped with the same successful titanium dioxide system was carried out. Zinc oxide shells were coated onto doped titanium dioxide, the known up-converting phosphor and the doped titanium dioxide coated known phosphor. The crystalline form of zinc oxide was inhibited by the incorporation of rare earth ions, as with the titanium dioxide system, and from the thickness of the zinc oxide shell. The highest degradation achieved was a 91% removal rate for the ZnO-PrY:TiO2-PrY:Y2SiO5-Pr,Li core shell shell structure indicating there was no further improvement on incorporation of zinc oxide, either doped or un-doped.

Style APA, Harvard, Vancouver, ISO itp.

Trofimovaite, Rima. "Nanostructured promoted titania photocatalysts". Thesis, Aston University, 2018. http://publications.aston.ac.uk/37498/.

Pełny tekst źródła

Streszczenie:

Concern over the economics of accessing fossil fuel and widespread acceptance of the anthropogenic origin of rising CO2 emissions and associated climate change is driving academic and commercial research into new routes to sustainable fuels, to meet the demands of a rapidly rising global population and reduce an impact on the environment. The titania oxide semiconductor has attracted a great interest as a photocatalyst for wide-ranging applications including wastewater depollution, solar fuels via both H2 production and CO2 reduction. Tailoring the physicochemical properties of titania photocatalysts, and their resulting reactivity, in a predictable fashion remains challenging. The thesis explores the impact of thermal processing, macroporosity and metal deposition on the surfactant-templated mesoporous TiO2 and dual soft-hard templated macro-mesoporous TiO2 series and resulting activity in aqueous phase photocatalytic dye degradation, H2 production and CO2 reduction reactions. Control over the structural and photophysical properties of mesoporous titania enables systematic tuning of Methyl Orange photocatalytic depollution and H2 evolution. Hierarchical macro-mesoporous titanias exhibit uniform mesopores with macropore diameters that can be systematically tuned between 140-310 nm, resulting in a close-packed, ordered macropore framework. Hierarchically-structured TiO2 display two fold increase in photoactivity relative to mesoporous counterparts in the H2 production. Ultra-low concentrations (0.02-0.1 wt%) of copper introduced into the mesoporous and macro-mesoporous titania surfaces by wet-impregnation enhance activity for dye degradation by six fold, and for H2 production four fold, through the genesis of isolated Cu (I) species which suppress charge recombination. Furthermore, promotion with Pt increases photocatalytic activity in Methyl Orange degradation by eleven fold, H2 production 16-26 times and are the only series which display activity in the CO2 reduction reaction. Moreover, the impact of the macropore diameter on the activity of the Methyl Orange degradation is observed for Cu and Pt promoted macro-mesoporous TiO2 series. Nanostructured promoted titanias offer an insight into the relative importance of physicochemical and electronic properties upon their associated activity together with significantly enhanced photocatalytic performance.

Style APA, Harvard, Vancouver, ISO itp.

Daniel, Lisa Maree. "Laponite-supported titania photocatalysts". Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16669/3/Lisa_Daniel_Thesis.pdf.

Pełny tekst źródła

Streszczenie:

This thesis describes the synthesis and characterisation of titania photocatalysts for incorporation into a polyethylene film. Monodisperse, anatase-phase titania nanoparticles are prepared and the synthesis conditions necessary for attraction to a laponite clay support are determined. Methods of preventing agglomeration of the laponite system such as the use of a polyethylene oxide surfactant or chemical modification of the laponite plate edges with a dimethyloctyl methoxysilane are also explored. Finally, photocatalytic studies on the laponite-supported titania nanoparticles are performed, and the compatibility and photoactivity of these materials in the polyethylene film are examined.

Style APA, Harvard, Vancouver, ISO itp.

Daniel, Lisa Maree. "Laponite-supported titania photocatalysts". Queensland University of Technology, 2007. http://eprints.qut.edu.au/16669/.

Pełny tekst źródła

Streszczenie:

Style APA, Harvard, Vancouver, ISO itp.

Day, Nicholas Upton. "Polymeric Porphyrins as Solar Photocatalysts". PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2625.

Pełny tekst źródła

Streszczenie:

Research concentrated on the absorption, transformation, and storage of light energy is useful for the energy challenges faced by humanity. In particular, photocatalysis using solar energy to generate useful fuels has become a primary research goal in the drive to replace fossil fuels for the future. In this dissertation it is shown that poly-tetra(4-aminophenyl)porphyrin (pTAPP) can be oxidatively polymerized using a variety of methods, including electropolymerization, chemical oxidation, and interfacial polymerization and that pTAPP has photocatalytic ability to reduce O2 to H2O2 for a storable fuel. Organic conductive polymers such as pTAPP are attractive catalysts because of their high surface area and ability to coat electrodes. pTAPP in a mixed oxidation state is shown to have both its minimum charge transfer resistance as well as its minimum impedance to electronic conductivity in the film. The UV-vis-NIR absorption spectra of pTAPP with increased oxidative doping are similar to hyperporphyrin spectra, characteristic of a two-plus charge localized on a single porphyrin unit. This suggests the presence of a bipolaron on the individual porphyrin units, and thus a bipolaron conductivity mechanism has been proposed. pTAPP changes color depending on its oxidation state, and therefore is a promising material for electrochromic devices. A novel Pourbaix diagram was created as a means of illustrating the redox and protonation states of pTAPP as a function of changes in pH, applied potential, electrochromic behavior, and electronic conductivity. Both pTAPP and pCoTAPP were shown to be effective catalysts for the reduction of oxygen to hydrogen peroxide, with pCoTAPP a better catalyst than pTAPP. When pCoTAPP is irradiated, oxygen reduction occurs close to the thermodynamic potential, indicating a promising system for storage of solar energy.

Style APA, Harvard, Vancouver, ISO itp.

Ran, Rong. "Preparation and Optimization of Novel Visible-Light-Active Photocatalysts for Waste-Water Treatment". Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34152.

Pełny tekst źródła

Streszczenie:

Photocatalysis is a series of advanced light-induced redox reaction processes resulting in the degradation and mineralization of organic pollutants in the presence of oxygen and water. Due to their capability to destroy contaminants under mild conditions, photocatalytic processes have attracted considerable attention in the field of waste-water treatment. However, photocatalytic reactions using the traditional TiO2 photocatalyst suffer from low energy efficiencies under solar irradiation. This low efficiency in the utilization of solar energy lies in its incapability in absorbing visible lights and also the high recombination rate of photo-excited species in photocatalysts. In addition, difficulties in the separation of fluids from micro- or nano-scale catalysts in large scale systems substantially impact cost efficiency in practice. In this thesis, strategies are explored which address these issues in order to improve the feasibility of solar photocatalysis. Two branches of photocatalytic transition metal-oxide semiconductor materials are investigated, namely bismuth-based and silver-based multi-phase heterogeneous photocatalysts. This research is focused on the design of visible-light-active metal-oxide photocatalysts to increase the absorption of visible light and to decrease the rates of electron-hole recombination, resulting in a high photocatalytic efficiency in regards to the degradation of organic pollutants. BiVO4 powder, synthesized from freshly made potassium metavanadate was prepared via hydrothermal treatment, characterized and experimentally investigated for the degradation of rhodamine B under visible light irradiation. The crystal structures and the specific surface areas of the composites, based on BiVO4 single phase crystal structures, are discussed. A multi-phase silver species (Ag2O/Ag3VO4/Ag4V2O7) photocatalyst was synthesized by adjusting the molar ratio of silver to vanadium (Ag to V) via hydrothermal method. The stabilities of as-prepared silver species composites regarding crystal structural changes due to photocatalytic reactions are investigated. Multi-phase silver species composites assisted with graphene oxide (GO-Ag2O/Ag3VO4/AgVO3) were synthesized at room temperature, and exhibited high visible-light photocatalytic activities regarding the degradation of model organic pollutants. The effect of graphene oxide addition on the photoactivity and on the photocorrosion of silver species composites under VLI is explored. The synergistic roles of each individual phase incorporated into the multi-phase composites are discussed regarding the photocatalytic performance.

Style APA, Harvard, Vancouver, ISO itp.

Więcej źródeł

Książki na temat "Photocatalysts"

Naushad, Mu, Saravanan Rajendran i Eric Lichtfouse, red. Green Photocatalysts. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-15608-4.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Yamashita, Hiromi, i Hexing Li, red. Nanostructured Photocatalysts. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Qin, Zuzeng, Tongming Su i Hongbing Ji. MXene-Based Photocatalysts. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003156963.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Anpo, Masakazu, i Prashant V. Kamat, red. Environmentally Benign Photocatalysts. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-48444-0.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Rajendran, Saravanan, Mu Naushad, Lorena Cornejo Ponce i Eric Lichtfouse, red. Green Photocatalysts for Energy and Environmental Process. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-17638-9.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Castello, Geri K. Handbook of photocatalysts: Preparation, structure and applications. New York: Nova Science Publishers, 2010.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Castello, Geri K. Handbook of photocatalysts: Preparation, structure, and applications. Hauppauge, N.Y: Nova Science Publishers, 2009.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

K, Castello Geri, red. Handbook of photocatalysts: Preparation, structure, and applications. Hauppauge, N.Y: Nova Science Publishers, 2009.

Znajdź pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Townsend, Troy K. Inorganic Metal Oxide Nanocrystal Photocatalysts for Solar Fuel Generation from Water. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05242-7.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Martin, David James. Investigation into High Efficiency Visible Light Photocatalysts for Water Reduction and Oxidation. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18488-3.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Więcej źródeł

Części książek na temat "Photocatalysts"

Shaham-Waldmann, Nurit, i Yaron Paz. "Modified Photocatalysts". W Photocatalysis and Water Purification, 103–43. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527645404.ch5.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Wu, Jiang, Jianxing Ren, Weiguo Pan, Ping Lu i Yongfeng Qi. "Modified Photocatalysts". W Energy and Environment Research in China, 65–82. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8750-9_4.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Suárez, Silvia. "Immobilised Photocatalysts". W Green Energy and Technology, 245–67. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5061-9_12.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Kale, Bharat B., Manjiri A. Mahadadalkar i Ashwini P. Bhirud. "Glassy Photocatalysts: New Trend in Solar Photocatalysis". W Visible Light-Active Photocatalysis, 165–89. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527808175.ch7.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Bian, Zhenfeng, Yuning Huo i Hexing Li. "Novel Titanium Oxide Materials Synthesized by Solvothermal and Supercritical Fluid Processes". W Nanostructured Photocatalysts, 3–21. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_1.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Liu, Shengwei, i Jiaguo Yu. "Effect of F-Doping on the Photocatalytic Activity and Microstructures of Nanocrystalline TiO2 Powders". W Nanostructured Photocatalysts, 187–200. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_10.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Ichihashi, Yuichi, Atsushi Okemoto, Kazutaka Obata, Keita Taniya i Satoru Nishiyama. "Photocatalytic Decomposition of NH3 Over Fe-Doped TiO2 Prepared by Solid-State Impregnation". W Nanostructured Photocatalysts, 201–9. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_11.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Higashimoto, Shinya. "Surface-Functionalized TiO2 Photocatalyst Modified by the Interfacial Surface Complex (ISC)". W Nanostructured Photocatalysts, 211–25. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_12.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Kamegawa, Takashi, i Hiromi Yamashita. "Photocatalytic Properties of TiO2-Loaded Porous Silica with Hierarchical Macroporous and Mesoporous Architectures". W Nanostructured Photocatalysts, 229–40. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_13.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Kuwahara, Yasutaka, Xufan Qian i Hiromi Yamashita. "TiO2 Photocatalyst Supported on Surface-Modified Silica Supports". W Nanostructured Photocatalysts, 241–57. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_14.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Streszczenia konferencji na temat "Photocatalysts"

Arakawa, Hironori, Zhigang Zou, Kazuhiro Sayama i Ryu Abe. "Solar Hydrogen Production: Direct Water Splitting Into Hydrogen and Oxygen by New Photocatalysts Under Visible Light Irradiation". W ASME 2003 International Solar Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/isec2003-44301.

Pełny tekst źródła

Streszczenie:

The photocatalytic splitting of water into hydrogen and oxygen using solar energy is one of the most attractive renewable sources of hydrogen fuel. Therefore, considerable efforts have been paid in developing photocatalysts capable of using visible light, which accounts for about 43% of the solar energy. However such a photocatalyst has not been developed so far. We have developed a new Ni-doped indium-tantalum oxide photocatalyst, In1-xNixTaO4 (x = 0.0∼0.2), which induced direct splitting of water into stoichiometric amount of oxygen and hydrogen under visible light irradiation with a quantum yield of about 0.66% at 420.7 nm. We have also developed a new two-step water splitting system using two different semiconductor photocatalysts, Pt/WO3 photocatalyst for oxygen evolution and Pt/SrTiO3(Cr-Ta-doped) photocatalyst for hydrogen evolution, and a redox mediator, I−/IO3−, mimicking the Z-scheme mechanism of the natural photosynthesis. The quantum yield of this system was about 0.1% at 420.7nm. Both photocatalytic methods are the first examples for visible light water splitting system in the world.

Style APA, Harvard, Vancouver, ISO itp.

Yu, Jiaguo. "Solar Fuel Photocatalysts". W Photonics for Energy. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/pfe.2015.pw2f.2.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Rasponi, Marco, Tania Ullah, Richard Gilbert, Gianfranco B. Fiore i Todd Thorsen. "A Microfluidic Device for Flow-Through Blood Oxygenation by Photocatalytic Action". W ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206652.

Pełny tekst źródła

Streszczenie:

The breakthrough work of Fujishima and Honda in 1972 [1], in which they achieved ultraviolet light-induced water cleavage with the use of titanium dioxide (TiO2) in an electrochemical cell, has drawn considerable attention in recent years to the “acceleration of a photoreaction by the presence of a catalyst” [2] or photocatalysis. Research on photocatalysis has explored the decomposition of organic pollutants and microorganisms, the superhydrophilic self-cleaning properties of surfaces, and the photosplitting of water, among other applications. Semiconductors can act as photocatalysts because of their electronic structure and TiO2, in particular, has been a popular choice. It is non-toxic and mechanically stable, can be fabricated at low-cost, and the anatase phase of TiO2 has a bandgap of approximately 3.2 eV, ideal for excitation by light in the ultraviolet range.

Style APA, Harvard, Vancouver, ISO itp.

Liu, Hong. "Infrared light active photocatalysts and its TiO2 nanobelt heterostructures: towards full spectrum of sunlight photocatalysis". W Nanophotonics, Nanoelectronics and Nanosensor. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/n3.2013.nsa2a.1.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Chen, Yen-Shin, Bo-Kai Chao, Tadaaki Nagao i Chun-Hway Hsueh. "Improvement of Photocatalytic Efficiency by Adding Ag Nanoparticles and Reduced Graphene Oxide to TiO2". W JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.5p_a410_12.

Pełny tekst źródła

Streszczenie:

Titanium dioxide (TiO2) is the commonly used photocatalyst. However, because only a small ultraviolet portion of solar spectrum can excite the electron-hole pairs resulting from the large band gap (3.2 eV) [1] and the recombination rate is high, its efficiency is restrained. To overcome this drawback, we added silver nanoparticles and reduced graphene oxide (RGO) to construct the ternary plasmonic catalyst to improve the catalytic performance of TiO2 nanopowder (P25). We prepared three different geometries of Ag nanostructures including sphere, decahedron and prism because the plasmon resonance properties of Ag could be controlled by the morphology of Ag nanoparticle, which shows characteristic strong localized surface plasmon resonance (LSPR) leading to an increase in light absorption [2]. The incorporated RGO inhibited the charge recombination and enhanced the electron-hole separation. In this study, Ag nanodecahedrons/P25/RGO and Ag nano-prisms/P25/RGO hybrid photocatalysts possessed remarkable photocatalytic activity, which displayed over 8 times higher photocatalytic efficiency than the P25 photocatalyst.

Style APA, Harvard, Vancouver, ISO itp.

Banin, Uri. "Hybrid Semiconductor-Metal Nanoparticles as Photocatalysts". W nanoGe Fall Meeting 2018. València: Fundació Scito, 2018. http://dx.doi.org/10.29363/nanoge.fallmeeting.2018.089.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Amirav, Lilac. "Sculpting Photocatalysts on the Nano Scale". W nanoGe Fall Meeting 2018. València: Fundació Scito, 2018. http://dx.doi.org/10.29363/nanoge.fallmeeting.2018.279.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Dao, Thang Duy, Tadaaki Nagao, Kai Chen, Shatoshi Ishii i Gui Han. "Nanowire-plasmonic photocatalysts and thermal emitters". W Nano-Micro Conference 2017. London: Nature Research Society, 2017. http://dx.doi.org/10.11605/cp.nmc2017.01040.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Banin, Uri. "Hybrid Semiconductor-Metal Nanoparticles as Photocatalysts". W nanoGe Fall Meeting 2018. València: Fundació Scito, 2018. http://dx.doi.org/10.29363/nanoge.nfm.2018.089.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Amirav, Lilac. "Sculpting Photocatalysts on the Nano Scale". W nanoGe Fall Meeting 2018. València: Fundació Scito, 2018. http://dx.doi.org/10.29363/nanoge.nfm.2018.279.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Raporty organizacyjne na temat "Photocatalysts"

Day, Nicholas. Polymeric Porphyrins as Solar Photocatalysts. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.2621.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

D. Brent MacQueen. Discovery of Photocatalysts for Hydrogen Production. Office of Scientific and Technical Information (OSTI), październik 2006. http://dx.doi.org/10.2172/908153.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Majumder, S., M. Prairie, J. Shelnutt i S. Khan. Engineered photocatalysts for detoxification of waste water. Office of Scientific and Technical Information (OSTI), grudzień 1996. http://dx.doi.org/10.2172/420402.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Shelnutt, John A., Zhongchun Wang i Craig J. Medforth. Growth of metal and semiconductor nanostructures using localized photocatalysts. Office of Scientific and Technical Information (OSTI), marzec 2006. http://dx.doi.org/10.2172/919279.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Kanan, Sofian M. Synthesis of Metal Nanoclusters Doped in Porous Materials as Photocatalysts. Fort Belvoir, VA: Defense Technical Information Center, kwiecień 2008. http://dx.doi.org/10.21236/ada503178.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Vogt, Thomas. Structure-Composition-Property Relationships of Complex Bismuth Oxide Based Photocatalysts. Office of Scientific and Technical Information (OSTI), styczeń 2014. http://dx.doi.org/10.2172/1171182.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Zaera, Francisco, Christopher J. Bardeen i Yadong Yin. SISGR - Design and Characterization of Novel Photocatalysts With Core-Shell Nanostructures. Office of Scientific and Technical Information (OSTI), marzec 2017. http://dx.doi.org/10.2172/1346870.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Duan, Xiangfeng. Rational Design and Nanoscale Integration of Multi-Heterostructures as Highly Efficient Photocatalysts. Office of Scientific and Technical Information (OSTI), listopad 2017. http://dx.doi.org/10.2172/1406892.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Haddad, Raid Edward, C. Jeffrey Brinker, John Allen Shelnutt, Yi Yang, H. Eric Nuttall, Richard K. Watt, Anup K. Singl i in. DOE/BES/NSET annual report on growth of metal and semiconductor nanostructures using localized photocatalysts. Office of Scientific and Technical Information (OSTI), październik 2003. http://dx.doi.org/10.2172/918305.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Peters, R. W., J. M. Wu, N. Meshkov, M. C. Thurnauer, A. E. Ostafin i T. Rajh. Combined photooxidation/photoreduction using TiO{sub 2} photocatalysts to treat organic/inorganic metal-laden wastewaters. Office of Scientific and Technical Information (OSTI), marzec 1995. http://dx.doi.org/10.2172/28268.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

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!