Author: Kranthi Kumar Akurati
Publisher: Cuvillier Verlag
ISBN: 3867277621
Category : Nanotechnology
Languages : en
Pages : 195

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Book Description

Author: Aiguo Wu
Publisher: John Wiley & Sons
ISBN: 3527825444
Category : Science
Languages : en
Pages : 311

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Book Description
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.

Author: Shamaila Sajjad
Publisher: GRIN Verlag
ISBN: 3640986245
Category : Technology & Engineering
Languages : en
Pages : 172

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Book Description
Doctoral Thesis / Dissertation from the year 2011 in the subject Chemistry - Materials Chemistry, East China University of Science and Technology (-), language: English, abstract: Considerable effort has been made to design, fabricate, and manipulate nanostructured materials by innovative approaches. The precise control of nanoscale structures will pave the way not only for elucidating unique size/shape dependent physicochemical properties but also for realizing new applications in science and technology. Nanotechnology offers unprecedented opportunities for improving our daily lives and the environment in which we live. This thesis mainly describes recent progress in the design, fabrication, and modification of nanostructured semiconductor materials for environmental applications. The scope of this thesis covers TiO2, Bi2O3 and BiOCl materials, focusing particularly on TiO2-based nanostructures (e.g., pure, doped, coupled, mesoporous, hierarchically porous, and ordered mesoporous TiO2). Mesoporous titania is of particular interest since this class of materials possesses well-defined porosity and large specific surface areas. For photocatalytic degradation of organics, these desirable properties are anticipated to improve the efficiency. So in the first part of work, I have synthesized the mesoporous titania by using poly ethylene glycol as a template in dilute acetic acid aqueous solution by hydrothermal process and investigated the effect of PEG molecular weights and thermal treatment on the resultant structure and photocatalytic activity. When the molecular weights of PEG vary from 600 to 20,000, the particle sizes of mesoporous-TiO2 structure decrease from 15.1 to 13.3 nm and mean pore sizes increase from 6.9-10.6 nm. The activities of these mesoporous-TiO2 photocatalysts prepared by using PEG are evaluated and compared with Degussa P-25 using chloro-phenol as a testing compound. [...]

Author: Ali Reza Khataee
Publisher: World Scientific
ISBN: 9814374725
Category : Science
Languages : en
Pages : 205

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Book Description
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.

Author: Francesco Parrino
Publisher: Elsevier
ISBN: 0128204346
Category : Technology & Engineering
Languages : en
Pages : 735

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Book Description
Scientific interest in TiO2-based materials has exponentially grown in the last few decades. Titanium Dioxide (TiO2) and Its Applications introduces the main physicochemical properties of TiO2 which are the basis of its applications in various fields. While the basic principles of the TiO2 properties have been the subject of various previous publications, this book is mainly devoted to TiO2 applications. The book includes contributions written by experts from a wide range of disciplines in order to address titanium dioxide's utilization in energy, consumer, materials, devices, and catalytic applications. The various applications identified include: photocatalysis, catalysis, optics, electronics, energy storage and production, ceramics, pigments, cosmetics, sensors, and heat transfer. Titanium Dioxide (TiO2) and Its Applications is suitable for a wide readership in the disciplines of materials science, chemistry, and engineering in both academia and industry. Includes a wide range of current and emerging applications of titanium dioxide in the fields of energy, consumer applications, materials, and devices Provides a brief overview of titanium dioxide and its properties, as well as techniques to design, deposit, and study the material Discusses the relevant properties, preparation methods, and other apposite considerations in each application-focused chapter

Author: Magdalena Janus
Publisher: BoD – Books on Demand
ISBN: 9535134132
Category : Science
Languages : en
Pages : 260

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Book Description
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.

Author: Sweta Gahlot
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
The inorganic titanium dioxide TiO2 and metal-free graphitic carbon nitride (g-C3N4) are the two most important photocatalysts owing to their low cost, non-toxicity, high thermal and chemical stability, as well as high reactivity. However, these two materials also suffer from certain drawbacks such as a relatively high rate of electron-hole pair recombination, a slightly large bandgap that requires UV-light for activation (TiO2), and a relatively small surface area (g-C3N4).This thesis focuses to overcome above drawbacks by combining TiO2 with low bandgap metal chalcogenide semiconducting nanoparticles as a strategy to create an efficient charge separation at the interface of the heterojunctions and to extend the absorption to visible region. This thesis also attempts to improve the photocatalytic efficiency of g-C3N4 by synthesizing it with high surface area and, finely, by combining it with TiO2. After describing briefly the motivation behind the work and the existing literature on the subject matter in the first chapter, the Chapter 2 describes precursor-mediated synthesis and photocatalytic activity of binary coinage metal chalcogenide nanoparticles and their composites with TiO2 under mild conditions. We successfully isolate and characterize kinetically and/or thermally unstable molecular species during the reactions, thus providing an insight into the molecule-to-nanoparticle mechanisms. The metal chalcogenide-titania nanocomposites show superior activity for the photodegradation of formic acid under ultraviolet light, as compared to titania (P25), which is a well-established benchmark for photocatalysis under UV light. Chapter 3 describes the synthesis of ternary coinage metal chalcogenides and their composites with titania. A direct room temperature reaction of tBu2Se with copper and silver trifluoroacetates gives copper-silver-selenide nanoparticles that are formed via a highly reactive intermediate molecular species [Ag2Cu(TFA)4(tBu2Se)4]. We also employed the pre-formed copper chalcogenide NPs as precursors and reacted it with di-tertiary butyl chalcogenide to obtain ternary metal chalcogenide nanoparticles and their composites with TiO2 in pure phase and with high yield. Photocatalytic studies for the degradation of formic acid under ultraviolet radiations show that the ternary CuAgSe-TiO2 nanocomposites are even better photocatalysts than the binary chalcogenide-TiO2 nanocomposites described in Chapter 2. The second part of this thesis described in Chapter 4 diverges from the earlier chapters to concentrate on the coupling of titania with graphitic carbon nitride. In the first step, we develop a simple single-step calcination approach to synthesize graphitic nanoparticles with a high surface area (200 m2/g). We test the prepared photocatalyst for the degradation of formic acid and phenol under visible light, and analyze the effect of factors such as surface area, irradiance and concentration of carbon nitride on the photocatalytic performance. Results show that the performance increases linearly with surface area and irradiance, whereas it first increases and gradually reaches plateau as concentration of the photocatalyst is increased. In the second step, we couple carbon nitride with titania using mechanical mixing. The prepared nanocomposites are then evaluated for the photodegradation of formic acid under both ultraviolet and visible lights. Finally, the Chapter 5 describes the experimental details of the synthesis and characterization of the molecular precursors, metal chalcogenide nanoparticles, g-C3N4 nanosheets as well as their composites with TiO2. It also describes in detail the experimental setup for the photocatalytic studies.

Author: Mohamed A. Barakat
Publisher: Springer
ISBN: 3319242717
Category : Science
Languages : en
Pages : 39

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Book Description
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.

Author: Vladimiro Dal Santo
Publisher: MDPI
ISBN: 3038976946
Category : Science
Languages : en
Pages : 208

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Book Description
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.

Author: Bochra Bejaoui
Publisher: BoD – Books on Demand
ISBN: 1803556722
Category : Technology & Engineering
Languages : en
Pages : 260

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Book Description
Titanium dioxide (TiO2) has received a lot of attention due to its inexpensive cost, benign nature, and great photocatalytic potential. TiO2 has numerous applications, including in photocatalysts, Li-ion batteries, solar cells, and medical research. However, its performance is unsatisfactory due to a variety of issues, including a wide band gap (3.01 to 3.2 eV) and quick electron–hole pair recombination (1012 to 1011 s). Many efforts have been made to improve the qualities of TiO2, such as structural and dopant changes, which expand its applications. This book focuses on the properties of TiO2-modified nanoparticles, including their synthesis, alterations, and applications.