Photocatalytic Oxidation of 4-chlorophenol on Titanium Dioxide: A Comparison with [gamma]-radiolysis PDF Download
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Languages : en
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To gain useful insight into the mechanistic details of the TiO[sub 2] photocatalyzed oxidation of halogenated organic compounds, the intermediates produced during the photocatalytic degradation of 4-chlorophenol (4-CP) have been compared with those produced during [gamma]-radiolysis. Photocatalytic degradation of 4-CP produces aromatic intermediates consistent with [gamma]-radiolytic hydroxyl radical oxidation, but the distribution of the intermediates differs. The surface area of TiO[sub 2] has an important influence on the intermediate distribution suggesting that the presence of surface influences the reaction pathway. The course of photocatalytic transformation of 4-CP involves a combination of hydroxyl radical oxidation, direct electron transfer and surface chemical reactions contributing to the disappearance of 4-CP and its reaction intermediates in TiO[sub 2] slurries.
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Languages : en
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Book Description
To gain useful insight into the mechanistic details of the TiO[sub 2] photocatalyzed oxidation of halogenated organic compounds, the intermediates produced during the photocatalytic degradation of 4-chlorophenol (4-CP) have been compared with those produced during [gamma]-radiolysis. Photocatalytic degradation of 4-CP produces aromatic intermediates consistent with [gamma]-radiolytic hydroxyl radical oxidation, but the distribution of the intermediates differs. The surface area of TiO[sub 2] has an important influence on the intermediate distribution suggesting that the presence of surface influences the reaction pathway. The course of photocatalytic transformation of 4-CP involves a combination of hydroxyl radical oxidation, direct electron transfer and surface chemical reactions contributing to the disappearance of 4-CP and its reaction intermediates in TiO[sub 2] slurries.
Author: Lawrence W. Miller (Jr.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
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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: Elvis Fosso-Kankeu
Publisher: John Wiley & Sons
ISBN: 1119631416
Category : Science
Languages : en
Pages : 320
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Book Description
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.
Author: John A. Roth
Publisher: CRC Press
ISBN: 9781566764896
Category : Technology & Engineering
Languages : en
Pages : 268
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Book Description
This book contains technical papers, presented at the Fourth International Symposium on Chemical Oxidation: Technology for the Nineties held in Tennessee in 1984, on theory, design, and practices of chemical oxidation processes applied to environmental problems.
Author: George R. Helz
Publisher: CRC Press
ISBN: 135108674X
Category : Science
Languages : en
Pages : 665
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Book Description
Aquatic and Surface Photochemistry provides a broad overview of current research in the emerging field of environmental aquatic and surface photochemistry. Selected reviews and current research articles are blended to provide an in-depth treatment of various aspects of this research area. The first part of the text deals with photochemistry in the environment, covering recent research on the following topics: aquatic photochemistry of organic pollutants and agrochemicals, photochemical cycling of carbon and transition metals (especially iron), photochemical formation of reactive oxygen species in natural waters, photoreaction in cloud and rain droplets, and photoreactions on environmental surfaces (soil, ash, metal, oxide). The second part provides discussions and data on both heterogeneous photocatalytic and homogeneous processes, with topics ranging from applications to mechanistic studies. These chapters illustrate the wide diversity of pollutant classes that are degradable by photochemical techniques and the effects of various reaction conditions on the rates and efficiency of the techniques. Current kinetic studies are presented, which provide new information about the role of adsorption and the nature of the reactive oxidizing species that mediate these photoremediation processes.This book will interest civil, chemical, and environmental engineers, as well as chemists, soil scientists, geochemists, and atmospheric chemists.
Author: Xinchen Wang
Publisher: Elsevier
ISBN: 0128190035
Category : Science
Languages : en
Pages : 568
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Book Description
Photocatalytic materials can improve the efficiency and sustainability of processes and offer novel ways to address issues across a wide range of fields—from sustainable chemistry and energy production to environmental remediation. Current Developments in Photocatalysis and Photocatalytic Materials provides an overview of the latest advances in this field, offering insight into the chemistry and activity of the latest generation of photocatalytic materials.After an introduction to photocatalysis and photocatalytic materials, this book goes on to outline a wide selection of photocatalytic materials, not only covering typical metal oxide photocatalysts such as TiO2 but also exploring newly developed organic semiconducting photocatalysts, such as g-C3N4.Drawing on the experience of an expert team of contributors, Current Developments in Photocatalysis and Photocatalytic Materials highlights the new horizons of photocatalysis, in which photocatalytic materials will come to play an important role in our day-to-day lives. - Reviews developments in both organic- and inorganic-based materials for use in photocatalysis - Presents the fundamental chemistry and activity of a broad range of key photocatalytic materials, including both typical and novel materials - Highlights the role photocatalytic materials can play in sustainable applications
Author:
Publisher: John Wiley & Sons
ISBN: 3527688463
Category : Science
Languages : en
Pages : 367
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Book Description
The shift towards being as environmentally-friendly as possible has resulted in the need for this important volume on the topic of green nanoscience. Edited by two rising stars in the community, Alvise Perosa and Maurizio Selva, this is an essential resource for anyone wishing to gain an understanding of the world of green chemistry, as well as for chemists, environmental agencies and chemical engineers.
Author: Jesseming Tseng
Publisher:
ISBN:
Category :
Languages : en
Pages : 532
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Author: V. Ramamurthy
Publisher: CRC Press
ISBN: 9780824701741
Category : Science
Languages : en
Pages : 378
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Book Description
Focusing on complex naturally-occurring and synthetic supramolecular arrays, this work describes the mechanism by which transition metal complexes bind to DNA and how the DNA scaffold modifies the photochemical and photophysical properties to bound complexes. It includes details of photoinduced electron transfer between intercalated molecules, and examines thermally and photochemically induced electron transfer in supramolecular assemblies consisting of inorganic molecular building blocks.
