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Synthesis Characterization And Surface Modification Of Titanium And Zinc Oxide Nanostructures For Nanotoxicity Visible Light Emission And Photocatalytic Studies
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Book Synopsis Synthesis, Characterization and Surface Modification of Titanium and Zinc Oxide Nanostructures for Nanotoxicity, Visible Light Emission and Photocatalytic Studies by : Osman Arslan
Download or read book Synthesis, Characterization and Surface Modification of Titanium and Zinc Oxide Nanostructures for Nanotoxicity, Visible Light Emission and Photocatalytic Studies written by Osman Arslan and published by . This book was released on 2014 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Zinc Oxide Nanostructures: Synthesis and Characterization by : Sotirios Baskoutas
Download or read book Zinc Oxide Nanostructures: Synthesis and Characterization written by Sotirios Baskoutas and published by MDPI. This book was released on 2018-12-04 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Zinc Oxide Nanostructures: Synthesis and Characterization" that was published in Materials
Book Synopsis Nanostructured Titanium Dioxide Materials by : Ali Reza Khataee
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.
Book Synopsis Photocatalytic Nanomaterials for Environmental Applications by : Rajesh J. Tayade
Download or read book Photocatalytic Nanomaterials for Environmental Applications written by Rajesh J. Tayade and published by Materials Research Forum LLC. This book was released on 2018-02-25 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalytic nanomaterials have a great potential in such applications as reduction of carbon dioxide and degradation of various pollutants. They are equally important in the production and storage of energy, e.g. in the conversion of solar energy to electricity, and the production of hydrogen in photoelectrochemical cells. Research on synthesis, characterization and specific applications is reported for titanium oxide and a number of other promising catalysts, such as silver phosphate, cerium oxide, zinc oxide and zinc sulfide.
Book Synopsis ZnO and TiO2 Based Nanostructures by : Andrea Lamberti
Download or read book ZnO and TiO2 Based Nanostructures written by Andrea Lamberti and published by MDPI. This book was released on 2018-10-15 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "ZnO and TiO2 Based Nanostructures" that was published in Nanomaterials
Book Synopsis Zinc Oxide Nanostructures by : Magnus Willander
Download or read book Zinc Oxide Nanostructures written by Magnus Willander and published by CRC Press. This book was released on 2014-07-22 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) in its nanostructured form is emerging as a promising material with great potential for the development of many smart electronic devices. This book presents up-to-date information about various synthesis methods to obtain device-quality ZnO nanostructures. It describes both high-temperature (over 100° C) and low-temperature (under 100° C) approaches to synthesizing ZnO nanostructures; device applications for technical and medical devices, light-emitting diodes, electrochemical sensors, nanogenerators, and photodynamic therapy; and the concept of self-powered devices and systems using ZnO nanostructures. The book emphasizes the utilization of non-conventional substrates such as plastic, paper, and textile as new platforms for developing electronics.
Book Synopsis Green Synthesis, Characterization and Applications of Nanoparticles by : Ashutosh Kumar Shukla
Download or read book Green Synthesis, Characterization and Applications of Nanoparticles written by Ashutosh Kumar Shukla and published by Elsevier. This book was released on 2018-11-26 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green Synthesis, Characterization and Applications of Nanoparticles shows how eco-friendly nanoparticles are engineered and used. In particular, metal nanoparticles, metal oxide nanoparticles and other categories of nanoparticles are discussed. The book outlines a range of methodologies and explores the appropriate use of each. Characterization methods include spectroscopic, microscopic and diffraction methods, but magnetic resonance methods are also included as they can be used to understand the mechanism of nanoparticle synthesis using organisms. Applications covered include targeted drug delivery, water purification and hydrogen generation. This is an important research resource for those wishing to learn more about how eco-efficient nanoparticles can best be used. Theoretical details and mathematical derivations are kept to a necessary minimum to suit the need of interdisciplinary audiences and those who may be relatively new to the field. Explores recent trends in growth, characterization, properties and applications of nanoparticles Gives readers an understanding on how they are applied through the use of case studies and examples Assesses the advantages and disadvantages of a variety of synthesis and characterization techniques for green nanoparticles in different situations
Book Synopsis Improving the Optoelectronic Property and Photoactivity of Nano-structured Titanuim Dioxide by : Hong-Ying Lin
Download or read book Improving the Optoelectronic Property and Photoactivity of Nano-structured Titanuim Dioxide written by Hong-Ying Lin and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide (TiO 2) has been proven to be one of the most important and widely used photocatalyst for applications such as gas/liquid phase environmental cleaning, solar hydrogen generation, sensitized solar cell, UV filtration, etc. The biggest challenge in the applications of this semiconductor photocatalyst is its large band gap (~ 3.2 eV) which limits the utilizable spectrum of photons from the solar light (~ 4 to 5 %). To improve the optical sensitivity of TiO 2 in the visible light region, the band gap of TiO 2 needs to be tailored. The reduction of TiO 2 band gap can be achieved by controlling of its electronic structure via two routes: changing the particle size and doping it with impurities. To precisely control the size of TiO 2 particles, anatase TiO 2 nanocrystallines (17 to 29 nm) were synthesized by metallo-organic chemical vapor deposition (MOCVD) method with moderate control on system parameters (i.e. pressure and gas flow rates). The results of band gap change as a function of particle size agreed well with what was predicted using the Brus' effective mass model (EMM). However, the observations from photocatalytic oxidation of 2-chlorophenol (2-CP) showed that the smaller the particle size, the faster the degradation rate. This is attributed in part to the combined effect of band gap change relative to the spectrum of the light source and the specific surface area (or particle size) of the photocatalysts. Our results indicate that the gain in specific surface area due to the smaller particle size outweighs the improvement on its optical property (e.g. reduction in bandgap) under similar experimental condition. Our observation also showed the secondary particle size to be time dependent due to the aggregation and is highly correlated with its primary particle size. The nitrogen doped TiO 2 thin film synthesis was carried out with two different approaches: (1) oxidation of the titanium nitride (TiN) thin film and (2) reactive pulsed laser deposition (PLD). Nitrogen doping of TiO 2 in the former approach was done by the oxidation of TiN thin films at 800 ̊C in ambient air. The phase transformation of TiN to TiO 2 appears to be a function of annealing time. The X-ray photoelectron spectroscopy (XPS) studies have shown that the substitutionally doped TiO 2-x N x (N 1 s ~ 396 eV) remains stable only for the first two minutes of annealing. As the annealing proceeds, the N 1s XPS peak shifts to higher binding energy (N1 s ~ 400 and 402 eV) which indicates that binding energy of N atom shifted from substitutional site (Ti-N) to chemisorbed site (N=-N) when annealing process exceeds five minutes due to the substitution of Ti-N bond by Ti-O bond. Results from both depth profile XPS and cross-section TEM showed that the formation of TiO 2-x N x depends on the distance from the film surface. Film structure studied by X-ray diffraction (XRD) showed that mixed TiN and rutile TiO 2 phases formed between four and twenty four hours of annealing time. The optical properties were examined using UV-VIS spectroscopy. The most visible light sensitive samples showed ~65 to 105 nm red-shift on its absorption edges from that of pure TiO 2, which is equivalent to ~0.47 to 0.73 eV reduction in the effective bandgap. Our results suggest that surface oxidation of TiN is an effective method for the synthesis of band gap tailored oxides which have applications in photocatalysis, photovoltaic, etc. Doping of N into TiO 2 lattice was also achieved using the reactive pulsed laser deposition technique. The N concentration was controlled by adjusting the mixing ratio of make-up (N 2) and buffer (1:1 O 2 and Ar mixture) gases during laser ablation. (Abstract shortened by UMI.).
Book Synopsis Titanium Dioxide Nanoparticles by : Yucheng Lan
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.
Book Synopsis Updates on Titanium Dioxide by : Bochra Bejaoui
Download or read book Updates on Titanium Dioxide written by Bochra Bejaoui and published by BoD – Books on Demand. This book was released on 2023-08-30 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Titanium Dioxide Nanomaterials: Volume 1352 by : Xiaobo Chen
Download or read book Titanium Dioxide Nanomaterials: Volume 1352 written by Xiaobo Chen and published by Materials Research Society. This book was released on 2011-11-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide nanomaterials have been showing very promising applications in many fields. Scientists from all over the world have gathered together to discuss the most recent advances in areas spanning from theoretical calculations to fundamental surface science and to materials fabrication, characterization and practical exploitation. More than 160 papers, presentations and posters, were accepted in Symposium GG, "Titanium Dioxide Nanomaterials," at the 2011 MRS Spring Meeting held April 25-29 in San Francisco, California. In this volume are some of the selected papers which cover the synthesis, properties, and applications of titanium dioxide nanomaterials.
Book Synopsis Novel Synthesis and Characterization of Nanostructured Materials by : Annelise Kopp Alves
Download or read book Novel Synthesis and Characterization of Nanostructured Materials written by Annelise Kopp Alves and published by Springer Science & Business Media. This book was released on 2013-10-18 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured materials have been largely studied in the last few years. They have great potential of applications in different fields such as materials science, physics, chemistry, biology, mechanic and medicine. Synthesis and characterization of nanostructured materials is a subject of great interest involving science, market, politicians, government and society. Based on results obtained by the authors' research group during the past decade, this book comes to present novel techniques to synthesize nanostructured materials and characterize their properties such as crystallinity and crystallite size, specific surface area, particle size, morphology and catalytic activity. This book is aimed for students, researchers and engineers searching for methodologies to obtain and characterize nanostructures in details.
Book Synopsis Titanate and Titania Nanotubes by : Dmitry V Bavykin
Download or read book Titanate and Titania Nanotubes written by Dmitry V Bavykin and published by Royal Society of Chemistry. This book was released on 2009-11-26 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This exciting new book is a unique compilation of data from a wide range of chemical and spectroscopic instrumentation and the integration of nanostructure characterisation drawn from physical, chemical, electrochemical, spectroscopic and electron microscopic measurements. It fills a gap in the current nanomaterials literature by documenting the latest research from scientific journals and patent literature to provide a concise yet balanced and integrated treatment of an interesting topic: titanium oxide nanostructures within the emerging fashionable area of nanomaterials. Of particular interest are the following key chapters: * Modification and Coating Techniques - provides a unique summary and discussion of available techniques to coat surfaces with nanostructured materials * Chemical Properties - relates structure to surface chemistry and hence applications * Structural and Physical Properties - reviews the relationship between nanostructure and physical properties providing a basis for the rationalisation of applications The book, a valuable reference point, is aimed at professionals, postgraduates and industrial research workers in nanomaterials. Readers will gain a knowledge of the methods for synthesising nanomaterials as well as an understanding of their structure and resulting physical characteristics and a knowledge of their (existing and potential) applications.
Book Synopsis Nanotechnology in Skin, Soft Tissue, and Bone Infections by : Mahendra Rai
Download or read book Nanotechnology in Skin, Soft Tissue, and Bone Infections written by Mahendra Rai and published by Springer Nature. This book was released on 2020-01-14 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of the present book is to deal with the role of nanobiotechnology in skin, soft tissue and bone infections since it is difficult to treat the infections due to the development of resistance in them against existing antibiotics. The present interdisciplinary book is very useful for a diverse group of readers including nanotechnologists, medical microbiologists, dermatologists, osteologists, biotechnologists, bioengineers. Nanotechnology in Skin, Soft-Tissue, and Bone Infections is divided into four sections: Section I- includes role of nanotechnology in skin infections such as atopic dermatitis, and nanomaterials for combating infections caused by bacteria and fungi. Section II- incorporates how nanotechnology can be used for soft-tissue infections such as diabetic foot ulcer and other wound infections; Section III- discusses about the nanomaterials in artificial scaffolds bone engineering and bone infections caused by bacteria and fungi; and also about the toxicity issues generated by the nanomaterials in general and nanoparticles in particular. The readers will be immensely enriched by the knowledge of new and emerging nanobiotechnologies in a variety of platforms.
Book Synopsis "Synthesis of TiO2 based nanoparticles for photocatalytic applications by : Kranthi Kumar Akurati
Download or read book "Synthesis of TiO2 based nanoparticles for photocatalytic applications written by Kranthi Kumar Akurati and published by Cuvillier Verlag. This book was released on 2008-10-27 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various gas phase synthesis routes have been employed to produce TiO2 based nanoparticles for photocatalytic applications. Synthesis routes have been selected depending up on the feasibility/constraints of the particular process to produce a given kind of material. The first attempt at producing the photocatalysts involved the synthesis of pure TiO2 nanoparticles by a flame aerosol process. The growth behaviour of TiO2 particles which has significant influence on their crystallinity and surface area, has been controlled by varying the process parameters and selecting suitable flame configurations. An existing method to determine the crystallinity of the powder has been modified which facilitates comparison of the degree of crystallinity of the nanoparticles synthesized by various methods. Resultant TiO2 nanoparticles were characterized by X-ray diffraction (XRD) and nitrogen physisorption to determine the degree of crystallinity quantitatively and surface area, respectively, and the decomposition rate of an industrial dye, methylene blue, has been taken as the measure of the photocatalytic activity (PCA). The importance of an optimum combination of crystallinity and surface area for improved PCA has been shown by comparing the PCA of the as-synthesized nanoparticles with commercial TiO2 (Degussa P25). By depositing another semiconductor material on TiO2, PCA of the resultant composite photocatalyst can be improved due to the effective separation of the charge carriers. The deposited semiconductor has been chosen by virtue of its conduction band potential which should be higher than that of the TiO2. Accordingly, SnO2/TiO2 composite nanoparticles have been synthesized in a single-step by feeding evaporated precursor mixtures into an atmospheric pressure diffusion flame. For the lowest concentration (3.4 mol %) of SnO2 employed in this study anatase phase of TiO2 is stabilized, while segregation of SnO2 is seen at medium (6.9 to 12.4 mol %) and high concentrations (20.3 mol %). Though the equilibrium phase diagram predicts complete solubility of one oxide in another at all compositions, segregation of SnO2 phase is observed which is explained by the usage of diffusion flame in the present study. A particle formation mechanism of SnO2/TiO2 composites is proposed based on the single component aerosol formation. Photocatalytic activity of the composite particles is tested for the degradation of methylene blue and is compared with pure TiO2 synthesized under similar conditions. Improved photocatalytic activity of the composite particles is attributed to the stabilized anatase phase and better charge separation due to the coupling of TiO2 and SnO2 within the composite nanoparticles. The adsorption properties of the SnO2/TiO2 particles are similar to the pure TiO2 particles and the PCA can be further improved coupling the advantages of adsorption properties and charge carrier separation in a single system. WO3 is the kind of semiconductor material that has suitable conduction band potential and surface acidity to perform the dual function mentioned above. Due to the non-availability of the suitable volatile precursor for WO3, WO3/TiO2 composite nanoparticles have been synthesized by using flame spray synthesis. W and Ti precursors were dissolved in a suitable solvent and sprayed into the high temperature acetylene flame using an atomizing gas. Particles with controlled W:Ti ratios were produced at various flow rates of precursor solution and the resulting powders were characterized by BET (Brunauer-Emmett-Teller) surface area analysis, XRD, TEM (Transmission electron microscopy), Raman and ATR-IR (Attenuated total reflection infrared) spectroscopy. Two-dimensional coordinatively unsaturated wolframyl species were well dispersed on the TiO2 surface for the samples equal to or less than 3.6 mol% WO3 and contributed to increase the surface acidity. Crystalline WO3 was formed for the samples above 3.6 mol% WO3. The formation of crystalline WO3 is attributed to the enhanced rate of condensation of W species with increasing loading of tungsten. The variation of lambda (defined as the ratio of the actual oxygen-to-fuel ratio of the reactants to the stoichiometric fuel-to-oxygen ratio) affects the type of surface species dispersed on TiO2 particles and thereby the resultant acidity. The improved photocatalytic activity of the composite particles is attributed to the increased surface acidity and better charge separation due to the coupling of WOx species and TiO2 within the composite nanoparticles. The development of a practical photocatalytic system focuses on the cost effectiveness of the process. The usage of the expensive solar concentrators and artificial ultraviolet (UV) irradiation for photocatalytic reactions has negative influences on the cost effectiveness. In addition to the cost effectiveness resulting from using solar energy, abundance of the visible light (55 % compared to 6 % of UV) motivates to synthesize TiO2 nanoparticles that absorb visible light. Nitrogen doped TiO2 nanoparticles that absorbs visible light have been synthesized by hot-wall reactor synthesis. The extent of doping of nitrogen is controlled by varying the hot-wall reactor temperature and the flow rate of the gaseous reactants. Increasing the nitrogen concentration above a certain value reduces the PCA and is attributed to the formation of Ti3+ that act as recombination centre for the charge carriers. The concentration of nitrogen at which significant Ti3+ formation takes place has been systematically investigated by XPS (X-ray photoelectron spectroscopy) measurements.
Book Synopsis Nanostructures and Nanomaterials by : Guozhong Cao
Download or read book Nanostructures and Nanomaterials written by Guozhong Cao and published by World Scientific Publishing Company. This book was released on 2011-01-03 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the 2nd edition of the original “Nanostructures and Nanomaterials” written by Guozhong Cao and published by Imperial College Press in 2004. This important book focuses not only on the synthesis and fabrication of nanostructures and nanomaterials, but also includes properties and applications of nanostructures and nanomaterials, particularly inorganic nanomaterials. It provides balanced and comprehensive coverage of the fundamentals and processing techniques with regard to synthesis, characterization, properties, and applications of nanostructures and nanomaterials. Both chemical processing and lithographic techniques are presented in a systematic and coherent manner for the synthesis and fabrication of 0-D, 1-D, and 2-D nanostructures, as well as special nanomaterials such as carbon nanotubes and ordered mesoporous oxides. The book will serve as a general introduction to nanomaterials and nanotechnology for teaching and self-study purposes.
Book Synopsis Application of Titanium Dioxide by : Magdalena Janus
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.
