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Book Titanium Dioxide Films for Photocatalytic Degradation of Methyl Orange Dye

Download or read book Titanium Dioxide Films for Photocatalytic Degradation of Methyl Orange Dye written by Rodrigo Teixeira Bento and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this work was to characterize and evaluate the influence of the thickness on the photocatalytic efficiency of titanium dioxide thin films on the degradation of methyl orange dye under UV light irradiation. The films of 280 and 468 nm thick were deposited on borosilicate substrates at 400°C by the MOCVD technique using titanium isoproxide IV as precursor. XRD analyses showed the formation of anatase-TiO2 phase. Cross-sectional FE-SEM images show that the films presented a dense columnar structure and grown perpendicularly to the substrate surface. The photocatalytic activity of the catalysts was studied using UV-vis spectrophotometry The TiO2 film with 468 nm of thickness presented higher photocatalytic activity exhibiting 69% of dye degradation. The increase of grain size and thickness of the films promoted an improvement of photocatalytic efficiency.

Book Photocatalysis Fundamental Processes and Applications

Download or read book Photocatalysis Fundamental Processes and Applications written by Mehrorang Ghaedi and published by Academic Press. This book was released on 2021-03-19 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis: Fundamental Processes and Applications, Volume 32 in the Interface Science and Technology Series, discusses the fundamental aspects of photocatalysis and its process and applications to the decontamination of wastewater, hydrogen production via water splitting, and photo reduction of carbon dioxide to hydrocarbon. The book discusses the fundamental aspects of all applications together with their proper mechanisms, thus providing essential information for deep research in the area of clean environment and green energy production. Provides background on the fundamental and experimental processes of photocatalysis Covers photocatalysis and its impact on creating a clean environment and energy sources Applies photocatalysis to the decontamination of wastewater, hydrogen production via water splitting, and photo reduction of carbon dioxide to hydrocarbon Edited by a world-leading researcher in interface science

Book Photocatalytic Degradation of Methyl Orange by TiO2

Download or read book Photocatalytic Degradation of Methyl Orange by TiO2 written by Kae Yang Eng and published by . This book was released on 2011 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Photocatalytic Degradation of Methyl Orange Using TiO2 Impregnated Activated Carbon

Download or read book Photocatalytic Degradation of Methyl Orange Using TiO2 Impregnated Activated Carbon written by Abubakar Muhammad and published by . This book was released on 2015 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Photocatalytic Degradation of Methyl Orange Using Modified Mesoporous TiO2 and Au9 Clusters

Download or read book Photocatalytic Degradation of Methyl Orange Using Modified Mesoporous TiO2 and Au9 Clusters written by Anahita Motamedisade and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Au nanoclusters (Au NCs) exhibit intriguing size-dependent catalytic, electronic, and optical properties. This thesis uncovers the pivotal role of Au NCs in enhancing the photocatalytic efficiency of titanium dioxide (TiO2) through improved charge separation. -- As the catalytic efficiency of these NCs is closely linked to their size, preventing Au9 NCs' agglomeration becomes essential to enhance catalytic activity, particularly following heat treatment aimed at ligand removal. The study focuses on designing novel systems capable of adsorbing high levels of ultra-small Au9 NCs and preventing their agglomeration during deposition and annealing processes. -- The first approach to achieving this aim involves the preparation of mesoporous TiO2 (MTiO2) with a high density of surface defects, a high specific surface area, and a 3D pore network. These structures provide anchoring sites for the adsorption of Au9 NCs, curbing their mobility and suppressing the tendency to aggregate. Another strategy involves introducing functional groups on the mesoporous TiO2 surface through N or S functionalisation. These chemically modified MTiO2 surfaces can potentially establish a more robust bond between the Au9 NCs and the MTiO2 substrate, preventing agglomeration. -- Comprehensive characterisation techniques, including X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Near-edge X-ray absorption fine structure (NEXAFS), Energy-Dispersive X-ray Spectroscopy (EDS), High-Resolution Transmission Electron Microscopy (HRTEM), and Scanning Transmission Electron Microscopy (STEM), provide detailed insights into the properties of the nanocomposites such as the phase type of TiO2, surface morphology and chemistry, and elemental composition, as well as size and dispersity of the Au9 NCs immobilised onto the substrate surface. -- A comprehensive investigation into the relative impacts of surface modification and functionalisation strategies on enhancing the loading of Au9 NCs while mitigating agglomeration is conducted using XPS. Subsequently, the most promising photocatalyst system is identified, and an in-depth analysis of its photocatalytic efficiency in the degradation of methyl orange dye is conducted. Reaction parameters are systematically examined, and their interrelationships are established by applying response surface methodology (RSM). -- In this study, the deposition of Au9 NCs onto S-functionalised mesoporous TiO2 (SMTiO2) is studied to produce efficient photocatalysts. The SMTiO2 substrates prevent the agglomeration of Au9 NCs and enhances the overall loading. Furthermore, nanocomposites of N-functionalised mesoporous TiO2 (NMTiO2) embedded with Au9 NCs are created using a chitosan-assisted soft templating method. The study evaluates the influence of the calcination atmosphere on substrate properties and the adsorption of Au9 NCs. The black NMTiO2 surfaces enhance loading and prevent agglomeration of Au9 NC even after heating, leading to improved photocatalytic effectiveness. -- Transitioning to more sustainable industrial processes is crucial for addressing global challenges. This study focuses on clean drinking water scarcity, specifically addressing hazardous run-offs from chemical industries. Methyl orange (MO) dye, a common environmental pollutant, is chosen as a model compound for studying photocatalytic degradation. The study emphasizes the examination of diverse parameters affecting the degradation of MO dye and study their relationship using Response Surface Methodology (RSM). -- In conclusion, the abstract encapsulates the objectives, methodologies, and key findings of the study, providing a comprehensive overview of the research conducted on Au9 NCs and their role in enhancing the photocatalytic efficiency of TiO2. In this comprehensive journey, our thesis elevates the art of surface modification, where science and creativity come together, opening new possibilities across various materials and systems.

Book Comparative Study of Photocatalytic Degradation of Methyl Orange Using Titanium Dioxide Doped with Different Metals

Download or read book Comparative Study of Photocatalytic Degradation of Methyl Orange Using Titanium Dioxide Doped with Different Metals written by Siti Farahiyah Mohd. Rosli and published by . This book was released on 2011 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Heterogeneous Photocatalysis

Download or read book Heterogeneous Photocatalysis written by M. Schiavello and published by . This book was released on 1997-10-09 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis is a reaction which is accelerated by light while a heterogeneous reaction consists of two phases ( a solid and a liquid for example). Heterogeneous Photocatalysis is a fast developing science which to date has not been fully detailed in a monograph. This title discusses the basic principles of heterogeneous photocatalysis and describes the bulk and surface properties of semiconductors. Applications of various types of photoreactions are described and the problems related to the modeling and design of photoreactors are covered.

Book Semiconductor Photocatalysis

Download or read book Semiconductor Photocatalysis written by Wenbin Cao and published by BoD – Books on Demand. This book was released on 2016-08-24 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis is a hot topic because it is an environmentally friendly approach toward the conversion of light energy into chemical energy at mild reaction environments. Also, it is well applied in several major areas such as water splitting, bacterial inactivation, and pollutants elimination, which is a possible solution to energy shortage and environmental issues. The fundamental knowledge and the frontier research progress in typical photocatalytic materials, such as TiO2-based and non-TiO2-based photocatalysts, are included in this book. Methods to improve the photocatalytic efficiency and to provide a hint for the rational design of the new photocatalysts are covered.

Book Nanoscale Materials in Water Purification

Download or read book Nanoscale Materials in Water Purification written by Sabu Thomas and published by Elsevier. This book was released on 2018-11-14 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Novel nanoscale materials are now an essential part of meeting the current and future needs for clean water, and are at the heart of the development of novel technologies to desalinate water. The unique properties of nanomaterials and their convergence with current treatment technologies present great opportunities to revolutionize water and wastewater treatment. Nanoscale Materials for Water Purification brings together sustainable solutions using novel nanomaterials to alleviate the physical effects of water scarcity. This book covers a wide range of nanomaterials, including noble metal nanoparticles, magnetic nanoparticles, dendrimers, bioactive nanoparticles, polysaccharidebased nanoparticles, nanocatalysts, and redox nanoparticles for water purification. Significant properties and characterization methods of nanomaterials such as surface morphology, mechanical properties, and adsorption capacities are also investigated Explains how the unique properties of a range of nanomaterials makes them important water purification agents Shows how the use of nanotechnology can help create cheaper, more reliable, less energy-intensive, more environmentally friendly water purification techniques Includes case studies to show how nanotechnology has successfully been integrated into water purification system design

Book Metal Organic Frameworks for Chemical Reactions

Download or read book Metal Organic Frameworks for Chemical Reactions written by Anish Khan and published by Elsevier. This book was released on 2021-02-05 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-Organic Frameworks for Chemical Reactions: From Organic Transformations to Energy Applications brings together the latest information on MOFs materials, covering recent technology in the field of manufacturing and design. The book covers different aspects of reactions from energy storage and catalysts, including preparation, design and characterization techniques of MOFs material and applications. This comprehensive resource is ideal for researchers and advanced students studying metal-organic frameworks in academia and industry. Metal-organic frameworks (MOFs) are nanoporous polymers made up of inorganic metal focuses connected by natural ligands. These entities have become a hot area of research because of their exceptional physical and chemical properties that make them useful in di?erent ?elds, including medicine, energy and the environment. Since combination conditions strongly a?ect the properties of these compounds, it is especially important to choose an appropriate synthetic technique that produces a product with homogenous morphology, small size dispersion, and high thermal stability. Covers the synthetic advantages and versatile applications of metal-organic frameworks (MOFs) due to their organic-inorganic hybrid nature and unique porous structure Includes energy applications such as batteries, fuel storage, fuel cells, hydrogen evaluation reactions and super capacitors Features information on using MOFs as a replacement to conventional engineering materials because they are lightweight, less costly, environmentally-friendly and sustainable

Book Graphene Oxide Physics and Applications

Download or read book Graphene Oxide Physics and Applications written by Jijun Zhao and published by Springer. This book was released on 2014-10-23 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive overview of graphene oxides (GO) from atomic structures and fundamental properties to technological applications. Atomic structural models, electronic properties, mechanical properties, optical properties, and functionalizing and compositing of GO are illustrated. Moreover, the excellent physical and chemical properties offer GO promising applications in electronic nanodevices, chemical sensors and catalyst, energy storage, and biotechnology, which are also presented in this book. Therefore, this book is of interest to researchers in physics, chemistry, materials science, and nanoscience.

Book Photocatalysts in Advanced Oxidation Processes for Wastewater Treatment

Download or read book Photocatalysts in Advanced Oxidation Processes for Wastewater Treatment written by Elvis Fosso-Kankeu and published by John Wiley & Sons. This book was released on 2020-06-10 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysts in Advanced Oxidation Processes for Wastewater Treatment comprehensively covers a range of topics aiming to promote the implementation of photocatalysis at large scale through provision of facile and green methods for catalysts synthesis and elucidation of pollutants degradation mechanisms. This book is divided into two main parts namely “Synthesis of effective photocatalysts” (Part I) and “Mechanisms of the photocatalytic degradation of various pollutants” (Part II). The first part focuses on the exploration of various strategies to synthesize sustainable and effective photocatalysts. The second part of the book provides an insights into the photocatalytic degradation mechanisms and pathways under ultraviolet and visible light irradiation, as well as the challenges faced by this technology and its future prospects.

Book Photostabilization of Polymers

Download or read book Photostabilization of Polymers written by J.F. Rabek and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two decades, the production of polymers and plastics has been increasing rapidly. In spite of developing new polymers and polymeric materials, only 40-60 are used commercially on a large scale. It has been estimated that half of the annual production of polymers is employed outdoors. Increasing the stability of polymers and plastics towards heat, light, atmospheric oxygen and other environmental agents and weathering conditions has always been a very important problem. The photochemical instability of most of polymers limits them to outdoor application, where they are photo degraded fast over periods ranging from months to a few years. To the despair of technologists and consumers alike, photodegrada tion and environmental ageing of polymers occur much faster than can be expected from knowledge collected in laboratories. In many cases, improved methods of preparation and purification of both monomers and polymers yield products of better quality and higher resistance to heat and light. However, without stabilization of polymers by applica tion of antioxidants (to decrease thermal oxidative degradation) and photostabilizers (to decrease photo-oxidative degradation) it would be impossible to employ polymers and plastics in everyday use.