Photodegradation of Methyl Orange Using Titanium Dioxide Catalyst PDF Download
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Author: Umi Khalsum Sulaiman
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
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Book Description
Author: Umi Khalsum Sulaiman
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
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Book Description
Author: Dongfang Yang
Publisher: BoD – Books on Demand
ISBN: 1789233267
Category : Technology & Engineering
Languages : en
Pages : 520
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Book Description
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.
Author: Rodrigo Teixeira Bento
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
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Book Description
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.
Author: Zuzeng Qin
Publisher: CRC Press
ISBN: 1000541304
Category : Technology & Engineering
Languages : en
Pages : 179
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Book Description
MXene, a two-dimensional (2D) transition metal carbide, nitride, and carbonitride, was discovered in 2011. MXene has great potential as a cocatalyst in the field of photocatalysis due to its unique properties and structure. MXene-Based Photocatalysts: Fabrication and Applications introduces readers to the fundamentals, preparation, microstructure characterization, and a variety of applications of MXene-based photocatalysts. The book is a comprehensive reference for MXene materials and provides an overview of the current literature on MXene-based photocatalysts. FEATURES Discusses preparation methods of MXenes Describes the morphology and microstructure of MXenes Offers strategies for fabricating MXene-based photocatalysts Details the reaction mechanism of MXene-based photocatalysts Covers applications in photocatalytic water-splitting, photocatalytic CO2 reduction, photocatalytic degradation, photocatalytic nitrogen fixation, and photocatalytic H2O2 production This book serves as an invaluable guide for advanced students, industry professionals, professors, and researchers in the field of materials science and engineering, photocatalysis, energy, and environmental applications.
Author: Sushma Dave
Publisher: Elsevier
ISBN: 0128242027
Category : Technology & Engineering
Languages : en
Pages : 796
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Book Description
Photocatalytic Degradation of Dyes: Current Trends and Future Perspectives covers in detail current trends and future aspects on photocatalytic degradation of organic dyes using novel photocatalytic techniques such as metallic nanoparticles, heterogeneous and hybrid systems using visible light irradiation. It highlights the most recent scientific and technological achievements and importance of degradation of dyes in the textile effluent by simple environmental friendly approaches using eco-friendly catalysts. It is of assistance to everyone interested in bioremediation of effluents: professionals, consulting engineers, academicians, and research scholars as well. - Describes the basic photocatalytic techniques and their application in wastewater treatment - Covers the key reactive species accounting for the photodegradation of different dyes, providing helpful guidelines that could be applied to foster the development of efficient photodegradation systems - Includes Description of a wide variety of catalysts and their application in degradation of dyes in the effluent of variable matrices (such as textile effluent, pharmaceutical industry effluent, food industry effluent) - Presents the application of doped semiconductors in the degradation of dyes, hybrid systems and their importance in the dye degradation - Describes the biological synthesis of metallic nanostructures and their use in dye degradation using visible range of light irradiation - Discusses the mechanistic aspect of the dye degradation using photo catalysts
Author: Siti Farahiyah Mohd. Rosli
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
Author: Shu Chin Lee
Publisher:
ISBN:
Category : Photocatalysis
Languages : en
Pages : 57
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Book Description
Author: M. Schiavello
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 218
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Book Description
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.
Author: Anahita Motamedisade
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
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.
Author: Sher Bahadar Khan
Publisher: BoD – Books on Demand
ISBN: 178985475X
Category : Science
Languages : en
Pages : 158
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Book Description
This book enlightens the type, chemical structure, and application of photo-catalysts. It covers the recent developments in photo-catalysts and their applications, particularly in photo-catalytic degradation of different organic pollutants, hydrogen production, etc. It provides a concise but complete coverage and overview of photocatalysts and their recent advances for a broad audience: beginners, graduate students, and specialists in both academic and industrial sectors.
