Download or read book Preparation and Characterization of Rare Earth Ions doped TiO2 Photocatalyst Film by RF magnetron Sputtering written by Suthin Yuenyaw and published by . This book was released on 2010 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Deposition of Pure and Doped TiO2 by RF Magnetron Sputtering for Visible Light Photocatalytic and Optoelectronic Applications written by Houssam Abdullber Fakhouri and published by . This book was released on 2012 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three different ways to dope nitrogen into TiO2 by means of RF reactive sputtering was compared, and the structural, optical, and photo-active performance of these materials were explored. First, multi-layered thin films of TiO2 and TiN were prepared by sputtering a titanium target and alternating oxygen and nitrogen reactive gases in the deposition chamber. The total thickness of each multi stack was kept constant while the overall composition of the films (TiN to TiO2 ratio) was varied between 5% and 30% and the number of TiN/TiO2 bi-layers was increased from 9 to 45. Secondly, we prepared N-TiO2 by introducing oxygen and nitrogen reactive gases simultaneously during the depositions. The ratio of oxygen to nitrogen was systematically changed in order to control the concentration of nitrogen incorporation into the films between 0% and 6%. Finally, we prepared TiN thin films and oxidized them at different temperatures and for several time intervals. X-ray photoelectron spectroscopy showed that nitrogen was successfully doped into all of the TiO2 films in substitutional and/or interstitial sites depending on the deposition conditions. The variance in the concentration and position of the nitrogen doping had a significant effect on the optical, structural and photoactive properties of the three types of N-TiO2 films. The parameters of sputtering deposition were optimized using both plasma diagnostics and Design of Experiments. This study has shown the desirable ability to control several important physical and chemical characteristics of N-TiO2 films, with considerable promise for many applications.
Download or read book Chromium Doped TiO2 Sputtered Thin Films written by Anouar Hajjaji and published by Springer. This book was released on 2014-12-24 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents co-sputtered processes ways to produce chrome doped TiO2 thin films onto various substrates such as quartz, silicon and porous silicon. Emphasis is given on the link between the experimental preparation and physical characterization in terms of Cr content. Moreover, the structural, optical and optoelectronic investigations are emphasized throughout. The book explores the potencial applications of devices based on Cr doped TiO2 thin films as gas sensors and in photocatalysis and in the photovoltaic industry. Also, this book provides extensive leads into research literature, and each chapter contains details which aim to develop awareness of the subject and the methods used. The content presented here will be useful for graduate students as well as researchers in materials science, physics, chemistry and engineering.
Download or read book Growth by Radio Frequency Sputtering and Characterisation of Rare Earth Doped Wide Bandgap Oxides written by Rajesh Pandiyan and published by . This book was released on 2013 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis reports the results of an experimental research on rare earth ion-doping effects on the structural, chemical, optical and near-infra-red photoluminescence properties of wide band gap oxide films. The aim of the work was to develop materials with good photoluminescence properties, which can be applied to increase the photovoltaic conversion efficiency of crystalline Si-based solar cells, through the increase of the most efficient and useful fraction of the solar spectrum which hits the cells, thanks to a photon frequency down-shifting process. Neodymium trivalent ion (Nd3+) was used as dopant of TiO2 and ZnO thin films. The films, with different Nd concentrations were grown onto quartz by RF plasma co-sputtering and annealed at different temperatures (400°-800°). Different film architectures were investigated for their photoluminescence properties. Structural changes such as phase transformation from anatase to rutile, internal strain building and lattice distortion due to Nd3+ incorporation in titania, correlated with optical changes, were evidenced. Exciting titania and zinc oxide matrices with optimal Nd concentrations, with ultra-violet (UV) light energies equal to or above their gap values resulted in an efficient frequency down-shifting from UV to near-infra-red emission. The joint study of the vibrational, chemical and structural properties of the doped films allows the understanding of the excitation energy transfer process between the matrix to the ion, where self-trapped excitons can be involved. To conclude this study, the doped films were tested as down-shifter layers onto a Si-solar cell where they gave promising results. They were also tested for their photoactivity with methylene blue, showing their inhibitor effect on the photo-degradation of this organic dye molecule.
Download or read book Preparation and Characterization of Lithium Thiogermanate Thin Films Using RF Magnetron Sputtering written by Bryce W. Campbell and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparation and Characterization of Dielectric Thin Films by RF Magnetron Sputtering with Ba0 3Sr0 7 Zn1 written by Feng Shi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sol Gel Synthesis and Characterization of Neodymium Ion Doped Nanostructured Titania Thin Films written by Andrew Burns and published by . This book was released on 2001 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nd doped TiO2 nanostructured thin films were prepared by sol-gel technique on quartz and Si substrates using TiCl4 precursor. As-deposited amorphous films were annealed to form anatase phase in the thin films. The film grain size increased with annealing temperature. Above 800 deg C, rutile began to segregate and the grain size decreased slightly. The photodegradation of 2-chlorophenol (2-CP) was studied. Doping TiO2 with Nd(+3) reduced the photodegradation time. The difference in the ionic radii of Nd(+3) and Ti(+4) and the oxygen affinities of Nd and Ti were responsible for this effect. These differences help promote electron trapping, thereby increasing the lifetime of the holes which are responsible for the oxidation of 2-CP.
Download or read book Photocatalytic Systems by Design written by Mohan Sakar and published by Elsevier. This book was released on 2021-08-14 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalytic Systems by Design: Materials, Mechanisms and Applications explores various aspects of photocatalysis, including the photocatalytic phenomenon and process, applications, and the design of photocatalysts via band gap engineering. The book also covers band edge position engineering for multiple photocatalytic applications, such as pollutant degradations, hydrogen production, CO2 reduction into hydrocarbon fuels, antimicrobial disinfections, organic synthesis, N2 fixation, and more. This book is designed to enable beginners to learn the concepts and applications of photocatalysis. Unlike conventional books on photocatalysis, the book provides a 360° perspective into the field of photocatalysis and serves as an informative handbook for all audiences. - Addresses all concepts and applications of photocatalysis - Covers the fundamentals, including mechanisms of photocatalytic materials - Describes the various material systems and engineering of photocatalysts - Offers insight into the schemes for photocatalysis of various materials - Discusses the application-specific design of photocatalysts
Download or read book Modified Chemical Vapor Deposition and Characterization of Rare Earth Ions in Heavy Metal doped Silica Glasses written by James Edgar Phillips and published by . This book was released on 2005 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparations and Characterization of Wolfram Doped Photocatalyst with Mesoporous Titanium Dioxide TiO2 Via a Sol gel Method written by Siti Ramlah Badarudin and published by . This book was released on 2012 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Rare Earth Doped Novel Optical Materials and Their Potential Applications written by Madhab Pokhrel and published by . This book was released on 2013 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Green Photocatalytic Semiconductors written by Seema Garg and published by Springer Nature. This book was released on 2021-09-20 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises a detailed overview on the role of photocatalysts for environmental remediation, hydrogen production and carbon dioxide reduction. Effective ways to enhance the photocatalytic activity of the material via doping, hybrid material, laser light and nanocomposites have been discussed in this book. The book also further elaborates the role of metal nanoparticles, rare earth doping, sensitizers, surface oxygen vacancy, interface engineering and band gap engineering for enhancing the photocatalytic activity. An approach to recover the photocatalytic material via immobilization is also presented. This book brings to light much of the recent research in the development of such semiconductor photocatalytic systems. The book will thus be of relevance to researchers in the field of: material science, environmental science & technology, photocatalytic applications, newer methods of energy generation & conversion and industrial applications.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2002 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TiO2 Photocatalysis written by Akira Fujishima and published by . This book was released on 1999 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxide Semiconductors for Solar Energy Conversion written by Janusz Nowotny and published by CRC Press. This book was released on 2016-04-19 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Chemically Deposited Nanocrystalline Metal Oxide Thin Films written by Fabian I. Ezema and published by Springer Nature. This book was released on 2021-06-26 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book guides beginners in the areas of thin film preparation, characterization, and device making, while providing insight into these areas for experts. As chemically deposited metal oxides are currently gaining attention in development of devices such as solar cells, supercapacitors, batteries, sensors, etc., the book illustrates how the chemical deposition route is emerging as a relatively inexpensive, simple, and convenient solution for large area deposition. The advancement in the nanostructured materials for the development of devices is fully discussed.
Download or read book Concepts of Semiconductor Photocatalysis written by Mohammed Muzibur Rahman and published by BoD – Books on Demand. This book was released on 2019-12-18 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book "Concepts of Semiconductor Photocatalysis" contains recent research on the preparation, characterization, and potential applications of the semiconductor photocatalyst. This research is promising and has received a lot of interest in the last few decades. The book covers advanced topics on the optical, physical, structural, and electro-catalysis and photo-catalysis applications. Development of new and noble efficient technology is pointing researchers toward the safe, facile, non-toxic, eco-friendly route of synthesis-to-applications, which can be used for manufacture at a large scale. This book presents an overview of the current photocatalyst fundamental theory, substantial applications, and use of the research worldwide. It is an important book for research organizations, government research-centers, academic libraries, and R
