Download or read book Characterization and Dispersition Behavior of Titanium Dioxide as Photocataytic Nanoparticles Using Metal Organic Chemical Vapour Deposition System written by Siti Hajar Othman and published by . This book was released on 2011 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrahigh Vacuum Metalorganic Chemical Vapor Deposition and in Situ Characterization of Nanoscale Titanium Dioxide Films written by Polly Wanda Chu and published by . This book was released on 1994 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin titanium dioxide films were produced by metalorganic chemical vapor deposition on sapphire(0001) in an ultrahigh vacuum (UHV) chamber. A method was developed for producing controlled submonolayer depositions from titanium isopropoxide precursor. Film thickness ranged from 0.1 to 2.7 nm. In situ X-ray photoelectron spectroscopy (XPS) was used to determine film stoichiometry with increasing thickness. The effect of isothermal annealing on desorption was evaluated. Photoelectron peak shapes and positions from the initial monolayers were analyzed for evidence of interface reaction. Deposition from titanium isopropoxide is divided into two regimes: depositions below and above the pyrolysis temperature. This temperature was determined to be 300 deg C. Controlled submonolayers of titanium oxide were produced by cycles of dosing with titanium isopropoxide vapor below and annealing above 300 deg C. Precursor adsorption below the pyrolysis temperature was observed to saturate after 15 minutes of dosing. The quantity absorbed was shown to have an upper limit of one monolayer. The stoichiometry of thin films grown by the cycling method were determined to be TiO2. Titanium dioxide film stoichiometry was unaffected by isothermal annealing at 700 deg C. Annealing produced a decrease in film thickness. This was explained as due to desorption. Desorption ceased at approximately 2.5 to 3 monolayers, suggesting bonding of the initial monolayers of film to sapphire is stronger than to itself. Evidence of sapphire reduction at the interface by the depositions was not observed. The XPS O is peak shifted with increased film thickness. The shifts were consistent with oxygen in sapphire and titanium dioxide having different O is photoelectron peak positions. Simulations showed the total shifts for thin films ranging in thickness of 0.1 to 2.7 nm to be -0.99 to -1.23 eV. Thick films were produced for comparison.
Download or read book Metal organic chemical vapor deposition and characterization of semiconducting titanium dioxide written by Jeffrey E. Bisberg and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Titanium Dioxide Nanoparticles written by Yucheng Lan and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few decades, titanium dioxide has been an important material for different sectors of modern technology. More precisely, this ceramic has been synthesised in the form of nanomaterial and applied in buildings, dye-sensitised solar cells, hydrogen production, sensors, rechargeable batteries, electrocatalysis, self-cleaning, environmental pollution, and antibacterial actions based on its enhanced optical properties. This book describes preparation, photocatalytic properties, and applications of nanostructured titanium dioxide with a particular focus on non-traditional syntheses and brookite. Titanium oxide nanoparticles are produced by hydrothermal processes, ionic liquid-assisted reactions, biological approaches, ball-milling techniques, etc. Physical properties and potential future applications of the produced nanostructured titanium dioxide nanoparticles are reviewed. Toxicity of titanium oxide nanoparticles and titanium oxide nanowires are also discussed.
Download or read book Titanium Dioxide written by Magdalena Janus and published by BoD – Books on Demand. This book was released on 2017-07-26 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Application of Titanium Dioxide written by Magdalena Janus and published by BoD – Books on Demand. This book was released on 2017-07-26 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 application of titanium dioxide in different branches of economy such as the agriculture, the food industry, the medicine, the cosmetics, the water treatment technologies, and the semiconductors.
Download or read book Titanium Dioxide written by Dongfang Yang and published by BoD – Books on Demand. This book was released on 2018-06-27 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Titanium Dioxide Photocatalysis written by Vladimiro Dal Santo and published by MDPI. This book was released on 2019-05-27 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Nanostructured Titanium Dioxide Materials written by Ali Reza Khataee and published by World Scientific. This book was released on 2012 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Metalorganic Chemical Vapor Deposition and Characterization of TiO2 Nanoparticles written by Weidong Li and published by . This book was released on 2004 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photocatalytic Activity Enhancement of Titanium Dioxide Nanoparticles written by Mohamed A. Barakat and published by Springer. This book was released on 2015-10-26 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Titanium Dioxide written by Hafiz Muhammad Ali and published by BoD – Books on Demand. This book was released on 2022-03-02 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of titanium dioxide, including recent advances and applications. It focuses on the compound’s uses in environmental remediation, photocatalytic materials, rechargeable lithium-ion batteries, thin films, energy storage, semiconductors, and much more. This volume is a useful resource for researchers, scientists, engineers, and students.
Download or read book Chemical Vapor Deposition and Characterization of Titanium Dioxide Thin Films written by David Christopher Gilmer and published by . This book was released on 1998 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanostructured Titanium Dioxide in Photocatalysis written by It-Meng Low and published by CRC Press. This book was released on 2021-06-18 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide (TiO2) has drawn considerable attention as an attractive inorganic raw material for various applications due to its inexpensiveness, nontoxic nature, stability, and excellent photocatalytic activity. Photocatalysis is one of the most promising route for sustainable chemistry of the 21st century. It can contribute to solving environmental, global energy, and chemical problems, as well as to the sustainable production of commodities in the near future. This book presents the fundamentals of photocatalysis in nanostructured TiO2 and describes the factors affecting the photocatalytic activity, design, and synthesis of various forms of nanostructured TiO2. 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 numerous applications in the fields of energy and environment, such as water purification, gas sensing, storage and delivery, and energy generation. The book is an invaluable resource and useful guide for a broad readership in various fields of catalysis, materials science, environment, and energy.
Download or read book Aerosol Assisted Chemical Vapour Deposition of Doped Titania Films Characterisation and Functional Properties written by Abdullah Mohmmed Alotaibi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide (TiO2) is the leading material for self-cleaning applications due to its unique propertiesAÌ‚ ̧ including the fact that it exhibits high photocatalysis, mechanical robustness, chemical inertness, low cost, environmentally friendliness and abundance. The bandgap of TiO2 is relatively large, and this limits its outdoor applications. Another obstacle for its use as a photocatalyst is the high level of electron"â€hole recombination and low rate of photoreaction with reactants. There have been great efforts to improve the photocatalytic properties of TiO2. These have involved searching for ways of decreasing the bandgap structure and recombination rate, as well as improving the electronic structure to enhance its functional properties under visible light. One useful approach for achieving a suitable bandgap and improving electron"â€hole separation is combining or doping TiO2 with anionic and/or cationic species. In this study, Cu-doped TiO2 films were deposited via aerosol-assisted chemical vapour deposition (AACVD). The Cu-doped TiO2 films system in both phases (anatase and rutile) were specifically investigated for improved photocatalytic and antimicrobial properties of TiO2 under UVA compared with pure TiO2 thin films. Interactions between substitutional (replacing oxygen sites) and interstitial (sitting in the TiO2 lattice) Cu in the anatase lattice may also explain the enhancement in exciton lifetimes. A range of copper concentrations (2, 5, 10 and 20%) was investigated so that the photocatalytic and antibacterial abilities (vs. S. aureus and E. coli) could be determined. Effective dopant selection and concentration control is key to providing the maximum efficiency in terms of carrier lifetimes for migration to the surface for the necessary reactions to take place in photocatalysis and antibacterial activity. Interestingly, the AACVD system could be used to deposit TiO2 in rutile form on a thin layer of ZrO2 at 500°C. Cu-doped rutile"â€TiO2 films using a range of copper concentrations (2, 5, 10 and 20%) were investigated as well. The films showed surface plasmon resonance (SPR). In addition, these films exhibited enhanced photocatalytic activity under visible light irradiation, which could have been due to SPR. To the best of our knowledge, this is the first time that the brookite thin film form has been deposited by AACVD; in using AACVD to deposit the brookite TiO2 thin films, the band structure and photocatalytic properties were investigated. The brookite films grown by AACVD showed a direct bandgap of 3.4 eV. It was found that the photocatalytic properties of the brookite form, in comparison with degradation of stearic acid, were greater than the activity of anatase TiO2 thin films, as well as active glass. In addition, transient absorption spectroscopy (TAS) measurements showed that the hole"â€electron recombination dynamics are similar in both phases. The high surface area of the brookite form compared with the surface area of the anatase thin film could be the primary reason for the super-photocatalytic properties. Surprisingly, the brookite film exhibited superhydrophilic properties prior to any irradiation. The addition of Zn and nitrogen into the matrix of TiO2 films by AACVD was studied most extensively to improve the functional properties of TiO2 and achieve its activity under visible light. The oxygen atom in TiO2 lattice can be replaced by a nitrogen atom, which is called Ns (substitutional doping) in this case; alternatively, nitrogen atoms can be set in the TiO2 lattice, and this is called Ni (interstitial doping). These approaches create NHX and NOX surface species, which were observed using the X-ray photoelectron spectroscopy (XPS) results in this research. Transient absorption spectroscopy (TAS) was used to investigate the addition of (N + Zn) on the charge carrier dynamics of TiO2. Heterojunction systems of semiconductor materials are employed in different applications, such as water splitting, catalysis and electronic devices. These systems strengthen the synergistic effect, electron tunnelling and electron transfer, thereby leading to improved performance compared with the individual components. By using AACVD and APCVD processes with heterojunction systems, TiO2/Fe2O3 films were deposited, and different thicknesses of TiO2 were used on the Fe2O3 films. The resulting TiO2/Fe2O3 films exhibited enhanced performance in terms of the photocatalytic properties for the degradation of stearic acid under white light, as well as better photocurrent density and stability of the TiO2/α-Fe2O3 heterojunction. The TAS measurements showed the extent of its lifetime photogenerated charges.
Download or read book Titanium Dioxide Nanoparticles written by Yucheng Lan and published by . This book was released on 2017 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few decades, titanium dioxide has been an important material for different sectors of modern technology. More precisely, this ceramic has been synthesized in the form of nanomaterial and applied in buildings, dye-sensitized solar cells, hydrogen production, sensors, rechargeable batteries, electrocatalysis, self-cleaning, environmental pollution, and antibacterial actions based on its enhanced optical properties. This book describes preparation, photocatalytic properties, and applications of nanostructured titanium dioxide with a particular focus on non-traditional syntheses and brookite. Titanium oxide nanoparticles are produced by hydrothermal processes, ionic liquid-assisted reactions, biological approaches, ball-milling techniques, etc. Physical properties and potential future applications of the produced nanostructured titanium dioxide nanoparticles are reviewed. Toxicity of titanium oxide nanoparticles and titanium oxide nanowires are also discussed.
Download or read book TiO2 Nanoparticles written by Aiguo Wu and published by John Wiley & Sons. This book was released on 2020-06-02 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique book that summarizes the properties, toxicology, and biomedical applications of TiO2-based nanoparticles Nanotechnology is becoming increasingly important for products used in our daily lives. Nanometer-sized titanium dioxide (TiO2) are widely used in industry for different purposes, such as painting, sunscreen, printing, cosmetics, biomedicine, and so on. This book summarizes the advances of TiO2 based nanobiotechnology and nanomedicine, covering materials properties, toxicological research, and biomedical application, such as antibacter, biosensing, and cancer theranostics. It uniquely integrates the TiO2 applications from physical properties, toxicology to various biomedical applications, and includes black TiO2 based cancer theranostics. Beginning with a comprehensive introduction to the properties and applications of nanoparticles, TiO2 Nanoparticles: Applications in Nanobiotechnology, Theranostics and Nanomedicine offers chapters on: Toxicity of TiO2 Nanoparticles; Antibacterial Applications of TiO2 Nanoparticles; Surface Enhanced Raman Spectrum of TiO2 Nanoparticle for Biosensing (TiO2 Nanoparticle Served as SERS Sensing Substrate); TiO2 as Inorganic Photosensitizer for Photodynamic Therapy; Cancer Theranostics of Black TiO2 Nanoparticles; and Neurodegenerative Disease Diagnostics and Therapy of TiO2-Based Nanoparticles. This title: -Blends the physical properties, toxicology of TiO2 nanoparticles to the many biomedical applications -Includes black TiO2 based cancer theranostics in its coverage -Appeals to a broad audience of researchers in academia and industry working on nanomaterials-based biosensing, drug delivery, nanomedicine TiO2 Nanoparticles: Applications in Nanobiotechnology, Theranostics and Nanomedicine is an ideal book for medicinal chemists, analytical chemists, biochemists, materials scientists, toxicologists, and those in the pharmaceutical industry.
