Titanium Dioxide Photocatalysis

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Application Of Titanium Dioxide Photocatalysis To Construction Materials

Author : Yoshihiko Ohama
ISBN : 9400712979
Genre : Technology & Engineering
File Size : 35.53 MB
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Titanium dioxide photocatalysis is based on the semiconducting nature of its anatase crystal type. Construction materials with titanium photocatalyst show performances of air purification, self-cleaning, water purification, antibacterial action. This book describes principles of titanium dioxide photocatalysis, its applications to cementitious and noncementitious materials, as well as an overview of standardization of testing methods.
Category: Technology & Engineering

Titanium Dioxide Photocatalysis

Author : Vladimiro Dal Santo
ISBN : 9783038976943
Genre : Science
File Size : 81.25 MB
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Although the seminal work of Fujishima et al. dates back to 1971, TiO2 still remains the most diffused and studied semiconductor, employed in photo-oxidation processes for cleantech (i.e., polluted water and air treatment), in solar fuel production (mainly hydrogen production by water photo splitting), and in Carbon Capture and Utilization (CCU) processes by CO2 photoreduction. The eleven articles, among them three reviews, in this book cover recent results and research trends of various aspects of titanium dioxide photocatalysis, with the chief aim of improving the final efficiency of TiO2-based materials. Strategies include doping, metal co-catalyst deposition, and the realization of composites with plasmonic materials, other semiconductors, and graphene. Photocatalysts with high efficiency and selectivity can be also obtained by controlling the precise crystal shape (and homogeneous size) and the organization in superstructures from ultrathin films to hierarchical nanostructures. Finally, the theoretical modeling of TiO2 nanoparticles is discussed and highlighted. The range of topics addressed in this book will stimulate the reader’s interest as well as provide a valuable source of information for researchers in academia and industry.
Category: Science

Solid State Chemistry And Photocatalysis Of Titanium Dioxide

Author : Maria K. Nowotny
ISBN : 9783038133735
Genre : Technology & Engineering
File Size : 20.6 MB
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Volume is indexed by Thomson Reuters BCI (WoS). The goal of this special volume was to provide a unique opportunity to exchange information, to present the latest results and to review relevant issues affecting contemporary diffusion research. The large number (over 232) of peer-reviewed papers emphasizes the considerable academic and industrial interest in this field.
Category: Technology & Engineering

Environmentally Benign Photocatalysts

Author : Masakazu Anpo
ISBN : 9780387484440
Genre : Science
File Size : 49.85 MB
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Over the past few decades, mankind has observed an unprecedented and remarkable growth in industry, resulting in a more prosperous lifestyle for peoples of many countries. In developing countries, however, explosive industrial growth is just now beginning to raise the living standards of the people. Most industries, especially in these developing countries, are still powered by the burning of fossil fuels; con- quently, a lack of clean energy resources has caused environmental pollution on an unprecedented large and global scale. Toxic wastes have been relentlessly released into the air and water leading to serious and devastating environmental and health problems while endangering the planet and life itself with the effects of global warming. To address these urgent environmental issues, new catalytic and photocatalytic processes as well as open-atmospheric systems are presently being developed that can operate at room temperature while being totally clean and ef?cient and thus environmentally harmonious. Essential to technologies harnessing the abundant solar energy that reaches the earth are the highly functional photocatalytic proce- es that can utilize not only UV light, but also visible light.
Category: Science

Nanostructured Titanium Dioxide In Photocatalysis

Author : Taylor & Francis Group
ISBN : 9814877077
Genre :
File Size : 50.25 MB
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This book presents the fundamentals of photocatalysis in nanostructured TiO2. The factors affecting photocatalytic activity, design, and preparation procedures of various forms of nanostructured TiO2 are described together with their numerous applications in the fields of energy and environment. It highlights the use of ion-doping and inert-atmosphere annealing to extend the light-absorption range of photocatalysts and reduce recombination between electrons and holes. It discusses promising applications, such as water purification, gas sensing, storage and delivery, and energy generation, and is an invaluable resource and useful guide for a broad readership in various fields of catalysis, material sciences, environment, and energy.
Category:

Photocatalytic Activity Enhancement Of Titanium Dioxide Nanoparticles

Author : Mohamed A. Barakat
ISBN : 9783319242712
Genre : Science
File Size : 31.32 MB
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In this brief, a comprehensive review of the UV/visible-TiO2 photocatalytic oxidation process is presented with an insight into the mechanisms involved, the role of titanium dioxide as a catalyst, irradiation sources, types of reactors, and a comparison between various modes of TiO2 application. An overview of the development and enhancement of the activity of TiO2 nanoparticles in photocatalysis is presented. The topics covered include a detailed look at the unique properties of the TiO2 nanoparticles and their relationship to photocatalytic properties. The utilization of the TiO2 nanoparticles as photocatalysts, in the non-doped and doped forms is also reviewed. Finally, the use of modified TiO2 nanoparticles has made a significant contribution in providing definitive mechanistic information regarding the visible light photocatalytic processes.
Category: Science

Doped Titanium Dioxide Aerogels For Various Catalytic And Photocatalytic Applications

Author : Steven Murphy
ISBN : OCLC:1196366912
Genre : Aerogels
File Size : 60.29 MB
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A reasonable, repeatable synthesis for titania sol gels and the production of titania aerogel was developed and optimized via a statistical design of experiments approach. Optimal conditions were determined by gel quality obtained. The TiO2 aerogel produced was characterized at various calcination temperatures and shown to be active for visible light photocatalysis of a model dye system, methylene blue. Improvement of the TiO2 for dye degradation reactions was successfully acheieved via the incorporation of a zirconium metal dopant, which showed an increase in overall activity and a reduction in reaction time by 30 minutes over the conventional titania catalyst. Zirconium doped into the material was shown to impact the band gap of the material by shifting the band gap to lower energies, making a more photoactive catalyst, along with the promotion of the development of anatase titania at lower calcination temperatures. The TiO2 aerogel was used as a support to disperse Cu and Fe through the material for use in the selective, partial oxidation reaction of cyclohexane to cyclohexanol. Preliminary work showed the Cu-TiO2 to be the most active, with optimized conditions leading to >99% conversion of cyclohexane, and >99% selectivity for cyclohexanol. A hybridization of a mesoporous TiO2 synthesis with the aerogel procedure presented here led to a high surface area, high pore volume material with an ordered mesoporous structure. Various metal dopants (Fe, Cu, Mn, Zr) were incorporated into the material, with all resulting catalysts showing activity for both methylene blue degradation and cyclohexane oxidation. All samples maintained their ordered mesoporous structures and high surface area/pore volumes at elevated temperatures. Unoptimized Cu-UCT-TiO2 aerogels showed higher activity than the unoptimized Cu-TiO2 aerogels, opening the door for development of a more efficient catalyst upon optimization.
Category: Aerogels

Titanium Dioxide

Author : Magdalena Janus
ISBN : 9789535134138
Genre : Science
File Size : 53.84 MB
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Titanium dioxide is mainly used as a pigment and photocatalyst. It is possible to find it in food, cosmetics, building materials, electric devices, and others. This book contains chapters about characteristics of anatase and rutile crystallographic structure of titanium dioxide and the use of theoretical calculation for photoactivity determination.
Category: Science

Nanomaterials For Photocatalytic Chemistry

Author : Yugang Sun
ISBN : 9789813142015
Genre : Science
File Size : 48.93 MB
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This book concentrates on the emerging area of the utilization of (solar) photon energy for catalyzing useful chemical reactions (also called artificial photosynthesis) including water splitting, CO2 reduction, selective epoxidation, selective alcohol oxidation, coupling reactions, etc. The chapters in this book cover topics ranging from materials design at nanometer scale to nanomaterials synthesis to photocatalytically chemical conversion. This book can serve as a useful reference for those new to this field of research or already engaged in it, from graduate students to postdoctoral fellows and practicing researchers.
Category: Science

Titanium Dioxide

Author : Dongfang Yang
ISBN : 9781789233261
Genre : Technology & Engineering
File Size : 71.84 MB
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Titanium dioxide is currently being used in many industrial products. It provides unique photocatalytic properties for water splitting and purification, bacterial inactivation, and organics degradation. It has also been widely used as the photoanode for dye-sensitized solar cells and coatings for self-cleaning surfaces, biomedical implants, and nanomedicine. This book covers various aspects of titanium dioxide nanomaterials including their unique one-dimensional, two-dimensional, mesoporous, and hierarchical nanostructures and their synthetic methods such as sol-gel, hydrothermal, anodic oxidation, and electrophoretic deposition, as well as its key applications in environmental and energy sectors. Through these 24 chapters written by experts from the international scientific community, readers will have access to a comprehensive overview of the recent research and development findings on the titanium dioxide nanomaterials.
Category: Technology & Engineering

Nanostructured Titanium Dioxide Materials

Author : Ali Reza Khataee
ISBN : 9789814374729
Genre : Science
File Size : 65.10 MB
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During the past decade, research and development in the area of synthesis and applications of different nanostructured titanium dioxide have become tremendous. This book briefly describes properties, production, modification and applications of nanostructured titanium dioxide focusing in particular on photocatalytic activity. The physicochemical properties of nanostructured titanium dioxide are highlighted and the links between properties and applications are emphasized. The preparation of TiO2 nanomaterials, including nanoparticles, nanorods, nanowires, nanosheets, nanofibers, and nanotubes are primarily categorized by their preparation method (sol-gel and hydrothermal processes). Examples of early applications of nanostructured titanium dioxide in dye-sensitized solar cells, hydrogen production and storage, sensors, rechargeable batteries, electrocatalysis, self-cleaning and antibacterial surfaces and photocatalytic cancer treatment are reviewed. The review of modifications of TiO2 nanomaterials is mainly focused on the research related to the modifications of the optical properties of TiO2 nanomaterials, since many applications of TiO2 nanomaterials are closely related to their optical properties. Photocatalytic removal of various pollutants using pure TiO2 nanomaterials, TiO2-based nanoclays and non-metal doped nanostructured TiO2 are also discussed.
Category: Science

Synthetic Methods For Titanium Dioxide Nanoparticles A Review

Author : Pardon Nyamukamba
ISBN : OCLC:1154169746
Genre : Technology
File Size : 86.33 MB
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Titanium dioxide (TiO2) semiconductor nanoparticles are one kind of important and promising photocatalysts in photocatalysis because of their unique optical and electronic properties. Their properties, which are determined by the preparation method, are very crucial in photocatalysis. In this chapter, an overview was carried out on the different methods that are used or have been used to prepare titanium dioxide nanoparticles. There are various methods that can be used to synthesize TiO2 and the most commonly used methods include sol-gel process, chemical vapor deposition (CVD) and hydrothermal method among others. This review will focus on selected preparation methods of titanium dioxide photocatalyst.
Category: Technology

Oxide Semiconductors For Solar Energy Conversion

Author : Janusz Nowotny
ISBN : 9781439848463
Genre : Science
File Size : 63.88 MB
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Oxide semiconductors, including titanium dioxide (TiO2), are increasingly being considered as replacements for silicon in the development of the next generation of solar cells. Oxide Semiconductors for Solar Energy Conversion: Titanium Dioxide presents the basic properties of binary metal oxide semiconductors and the performance-related properties of TiO2 as they relate to solar energy. The book provides a general background on oxide semiconductors based on binary oxides and their solid solutions, including electronic and ionic conductors. It covers several aspects of solid-state electrochemistry of oxides, such as defect chemistry, and defect-related properties, such as electrical properties, diffusion, segregation, and reactivity. The author also takes a pioneering approach in considering bulk versus surface semiconducting properties, showing how they are different due to the effect of segregation. One of the first on semiconducting, photocatalytic, and photoelectrochemical properties of TiO2 and its solid solutions with donor- and acceptor-type ions, the book discusses defect chemistry of TiO2 in terms of defect equilibria and defect-related properties, including electrical properties, self and chemical diffusion, surface properties, segregation, and reactivity and photoreactivity with oxygen, water, and microbial agents. The text also illustrates the use of TiO2 as an emerging material for solar energy conversion systems, including the generation of hydrogen fuel by photoelectrochemical water splitting, the photocatalytic purification of water, and the generation of photovoltaic electricity. In addition, it presents defect disorder diagrams for the formation of TiO2-based semiconductors with controlled properties. Encompassing the areas of solid-state science, surface chemistry, and photocatalysis, this book reflects the increasing awareness of the importance of structural imperfections, such as point defects, in understanding the properties of metal oxides, specifically TiO2-based semiconductors.
Category: Science