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Heterogeneous Photocatalysis

Heterogeneous Photocatalysis
  • Author : M. Schiavello
  • Publisher :Unknown
  • Release Date :1997-10-09
  • Total pages :197
  • ISBN : UOM:39015042927684
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Summary : 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.

Heterogeneous Photocatalysis

Heterogeneous Photocatalysis
  • Author : Giuseppe Marcì,Leonardo Palmisano
  • Publisher :Unknown
  • Release Date :2019-02-21
  • Total pages :290
  • ISBN : 9780444640161
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Summary : Heterogeneous Photocatalysis: Relationships with Heterogeneous Catalysis and Perspectives highlights the differences between thermal-catalysis and photo-catalysis and indicates borderlines, in particular, the possible synergism between them. The book outlines the basic aspect of thermal- and photo-catalysis, along with the most important characterization techniques. In addition, it presents case studies of thermal-catalytic and photo-catalytic or thermal-photo-catalytic reactions and includes a comparison between the results obtained using an inorganic solid as thermal catalyst and photocatalyst for the same reaction, and in the same setup. Final sections offer information on the preparation methods of (photo)catalysts, various techniques used for their characterization, engineering and economical aspects. This book will be a valuable reference source for students and researchers involved in heterogeneous photocatalysis and catalysis, chemistry, chemical engineering, materials science, materials engineering, environment engineering, nanotechnology and green chemistry. Provides selective methods for the preparation of microcrystalline/nanocrystalline solids or films used in catalytic and photocatalytic processes Describes (photo)reactions that can be carried out catalytically and/or photocatalytically Outlines the different mechanisms, yields and experimental conditions under which photocatalytic reactions can take place Describes various (photo)reactors and set ups under which the photacatalytic reactions can be carried out Provides an economic assessment to understand the feasibility of some photocatalytic reactions

Heterogeneous Photocatalysis

Heterogeneous Photocatalysis
  • Author : Juan Carlos Colmenares,Yi-Jun Xu
  • Publisher :Unknown
  • Release Date :2015-12-24
  • Total pages :416
  • ISBN : 9783662487198
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Summary : The book explains the principles and fundamentals of photocatalysis and highlights the current developments and future potential of the green-chemistry-oriented applications of various inorganic, organic, and hybrid photocatalysts. The book consists of eleven chapters, including the principles and fundamentals of heterogeneous photocatalysis; the mechanisms and dynamics of surface photocatalysis; research on TiO2-based composites with unique nanostructures; the latest developments and advances in exploiting photocatalyst alternatives to TiO2; and photocatalytic materials for applications other than the traditional degradation of pollutants, such as carbon dioxide reduction, water oxidation, a complete spectrum of selective organic transformations and water splitting by photocatalytic reduction. In addition, heterogeneized polyoxometalate materials for photocatalytic purposes and the proper design of photocatalytic reactors and modeling of light are also discussed. This book appeals to a wide readership of the academic and industrial researchers and it can also be used in the classroom for undergraduate and graduate students focusing on heterogeneous photocatalysis, sustainable chemistry, energy conversion and storage, nanotechnology, chemical engineering, environmental protection, optoelectronics, sensors, and surface and interface science. Juan Carlos Colmenares is a Professor at the Institute of Physical Chemistry, Polish Academy of Sciences, Poland. Yi-Jun Xu is a Professor at the State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, China.

Heterogeneous Photocatalysis Using Inorganic Semiconductor Solids

Heterogeneous Photocatalysis Using Inorganic Semiconductor Solids
  • Author : Umar Ibrahim Gaya
  • Publisher :Unknown
  • Release Date :2013-11-08
  • Total pages :213
  • ISBN : 9789400777750
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Summary : This book underscores the essential principles of photocatalysis and provides an update on its scientific foundations, research advances, and current opinions, and interpretations. It consists of an introduction to the concepts that form the backbone of photocatalysis, from the principles of solid-state chemistry and physics to the role of reactive oxidizing species. Having recognised the organic link with chemical kinetics, part of the book describes kinetic concepts as they apply to photocatalysis. The dependence of rate on the reaction conditions and parameters is detailed, the retrospective and prospective aspects of the mechanism of photocatalysis are highlighted, and the adsorption models, photocatalytic rate expressions, and kinetic disguises are examined. This book also discusses the structure, property, and activity relationship of prototypical semiconductor photocatalysts and reviews how to extend their spectral absorption to the visible region to enable the effective use of visible solar spectrum. Lastly, it presents strategies for deriving substantially improved photoactivity from semiconductor materials to support the latest applications and potential trends.

Homogeneous and Heterogeneous Photocatalysis

Homogeneous and Heterogeneous Photocatalysis
  • Author : E. PELIZZETTI,Nick Serpone
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :722
  • ISBN : 9789400946422
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Summary : Ever since the oil crisis of 1973, researchers in various fields of chemistry have proposed various schemes to conserve energy, as well to convert the sun's abundant and limitless supply of energy to produce chemical fuels (e. g. , hydrogen from water, . •. ). The enthusiasm had no previous parallel in the mid-1970's. Unfortunately, despite the several good proposals, the results have proven - in retrospect - somewhat disappointing from an economic viable point of view. The reasons for the meagre results are manyfold not the least of which are the experimental difficulties encountered in storage systems. Moreover, the lack of a concerted, well orchestrated interdisciplinary approach has been significant. By contrast, the chemical advances made in the understanding of the processes involved in such schemes have been phenomenal. A recent book on this issue ( M. Gratzel, Energy Resources through Photochemistry and Catalysis, 1983) is witness to the various efforts and approaches taken by researchers. In the recent years, many more groups have joined in these efforts, and the number of papers in the lit~rature is staggering ! One of the motives for organizing this NATO Advanced Research Workshop stemmed from our view that it was time to take stock of the accomplishments and rather than propose new schemes, it was time to consider seriously avenues that are most promising.

Heterogeneous Photocatalysis

Heterogeneous Photocatalysis
  • Author : Mario J. Muñoz-Batista,Alexander Navarrete Muñoz,Rafael Luque
  • Publisher :Unknown
  • Release Date :2020-08-07
  • Total pages :301
  • ISBN : 3030494918
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Summary : The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. The chapter "Mechanochemical Forces as a Synthetic Tool for Zero and One-Dimensional Titanium Oxide-Based Nano-photocatalysts" is available open access under a CC BY 4.0 License via link.springer.com.

Heterogeneous Nanocomposite-Photocatalysis for Water Purification

Heterogeneous Nanocomposite-Photocatalysis for Water Purification
  • Author : Rajendra Pawar,Caroline Sunyong Lee
  • Publisher :Unknown
  • Release Date :2015-04-29
  • Total pages :110
  • ISBN : 9780323393133
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Summary : In Heterogeneous Nanocomposite-Photocatalysis for Water Purification, the authors introduce various heterogeneous photocatalysts based on novel nanostructures of metal oxide semiconductors and graphene used for water purification, including TiO2, Fe2O3, SnO2, WO3 and g-C3N4, and outlines their advantages and drawbacks. The nanocomposite-photocatalysts ZnO and CdS are compared with reduced graphene oxide (rGO), a rapidly growing materials system. The authors describe how the photocatalytic activity of known nanomaterials can be improved by modifying the structural and optical properties (i.e., phase composition). Introductory portion of the book includes a brief survey of all different kinds of heterogeneous photocatalysts Discusses the possible photocatalysis mechanism occurring during the degradation of different toxic pollutants Provides the photoelectrochemical measurement for synthesized catalysts, supporting the effective transportation of photoelectrons resulting into better catalytic properties

Heterogeneous Nanocomposite-Photocatalysis for Water Purification

Heterogeneous Nanocomposite-Photocatalysis for Water Purification
  • Author : Rajendra Pawar,Caroline Sunyong Lee
  • Publisher :Unknown
  • Release Date :2015-04-29
  • Total pages :110
  • ISBN : 9780323393133
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Summary : In Heterogeneous Nanocomposite-Photocatalysis for Water Purification, the authors introduce various heterogeneous photocatalysts based on novel nanostructures of metal oxide semiconductors and graphene used for water purification, including TiO2, Fe2O3, SnO2, WO3 and g-C3N4, and outlines their advantages and drawbacks. The nanocomposite-photocatalysts ZnO and CdS are compared with reduced graphene oxide (rGO), a rapidly growing materials system. The authors describe how the photocatalytic activity of known nanomaterials can be improved by modifying the structural and optical properties (i.e., phase composition). Introductory portion of the book includes a brief survey of all different kinds of heterogeneous photocatalysts Discusses the possible photocatalysis mechanism occurring during the degradation of different toxic pollutants Provides the photoelectrochemical measurement for synthesized catalysts, supporting the effective transportation of photoelectrons resulting into better catalytic properties

A Photocatalytic Impeller Reactor for Gas Phase Heterogeneous Photocatalysis

A Photocatalytic Impeller Reactor for Gas Phase Heterogeneous Photocatalysis
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2017
  • Total pages :229
  • ISBN : OCLC:1052109234
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Summary : Highlights: A novel photoreactor configuration was designed. Photocatalytic impellers aid mass transfer of gaseous species. Reactor configuration overcomes mass transfer limitations. Inverse relationship observed between Damköhler numbers and photonic efficiency. Photo-oxidation in the reactor was reaction limited not mass transfer limited. Abstract: A novel photocatalytic reactor based on a stirred tank configuration has been described. This reactor employs the use of photocatalytic impellers to aid the mass transport of gaseous organic compounds during photocatalytic reactions. Experiments involving toluene vapour photo-oxidation showed the reactor configuration is susceptible to catalyst deactivation even at low concentrations if treated for prolonged periods. For this reactor, the reactive time scale exceeds the diffusive time scale hence, toluene photo-oxidation was reaction limited. The dependency of photonic efficiency of the reaction on mass transfer and catalyst deactivation was observed when correlated with the Damköhler number and deactivation induced reduction reaction rates respectively. The results show an inverse variation with Damköhler number and proportionality to reaction rates.

Nanotechnology and Photocatalysis for Environmental Applications

Nanotechnology and Photocatalysis for Environmental Applications
  • Author : Muhammad Bilal Tahir,Muhammad Rafique,Muhammad Shahid Rafique
  • Publisher :Unknown
  • Release Date :2020-07-14
  • Total pages :244
  • ISBN : 9780128211977
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Summary : Nanotechnology and Photocatalysis for Environmental Applications focuses on nanostructured control, synthesis methods, activity enhancement strategies, environmental applications, and perspectives of semiconductor-based nanostructures. The book offers future guidelines for designing new semiconductor-based photocatalysts, with low cost and high efficiency, for a range of products aimed at environmental protection. The book covers the fundamentals of nanotechnology, the synthesis of nanotechnology, and the use of metal oxide, metal sulfide, and carbon-based nanomaterials in photocatalysis. The book also discusses the major challenges of using photocatalytic nanomaterials on a broad scale. The book then explores how photocatalytic nanomaterials and nanocomposites are being used for sustainable development applications, including environmental protection, pharmaceuticals, and air purification. The final chapter considers the recent advances in the field and outlines future perspectives on the technology. This is an important reference for materials scientists, chemical engineers, energy scientists, and anyone looking to understand more about the photocatalytic potential of nanomaterials, and their possible environmental applications. Explains why the properties of semiconductor-based nanomaterials make them particularly good for environmental applications Explores how photocatalytic nanomaterials and nanocomposites are being used for sustainable development applications, including environmental protection, pharmaceuticals, and air purification Discusses the major challenges of using photocatalytic nanomaterials on a broad scale

Heterogeneous Photocatalysis

Heterogeneous Photocatalysis
  • Author : Daniel T. Schwartz
  • Publisher :Unknown
  • Release Date :1985
  • Total pages :282
  • ISBN : UCAL:X20704
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Summary :

Heterogeneous photocatalysis: data acquisition and analysis

Heterogeneous photocatalysis: data acquisition and analysis
  • Author : Bill Jang-Tsung Chen
  • Publisher :Unknown
  • Release Date :1983
  • Total pages :162
  • ISBN : UCAL:X15942
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Summary :

Current Developments in Photocatalysis and Photocatalytic Materials

Current Developments in Photocatalysis and Photocatalytic Materials
  • Author : Xinchen Wang,Masakazu Anpo,Xianzhi Fu
  • Publisher :Unknown
  • Release Date :2019-11-29
  • Total pages :566
  • ISBN : 9780128190036
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Summary : 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

Heterogeneous Photocatalysis: Degradation of Light Chlorinated Hydrocarbons in Dilute Ti0 Aqueous Slurries

Heterogeneous Photocatalysis: Degradation of Light Chlorinated Hydrocarbons in Dilute Ti0 Aqueous Slurries
  • Author : Chen-Yung Hsiao
  • Publisher :Unknown
  • Release Date :1983
  • Total pages :130
  • ISBN : UCAL:X16084
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Summary :

Heterogeneous Photocatalysis: Photoassisted Oxidation of Isopropanol to Acetone and Photodegradation of Volatile Organic Compounds

Heterogeneous Photocatalysis: Photoassisted Oxidation of Isopropanol to Acetone and Photodegradation of Volatile Organic Compounds
  • Author : Jie Chen
  • Publisher :Unknown
  • Release Date :1997
  • Total pages :229
  • ISBN : OCLC:1196368083
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Summary : Recently, a highly efficient photocatalyst consisting of amorphous manganese oxide (AMO) has been developed. Photoassisted catalytic oxidation of isopropanol has been studied by using amorphous manganese oxide catalysts with magnesium oxide as a diluent. When AMO or AMO/MgO is illuminated with UV-visible light in the presence of isopropanol vapor and oxygen at room temperature, the primary organic oxidation product is acetone. Enhanced yields for photooxidation of isopropanol with AMO/MgO mixtures have been observed. A continuous supply of oxygen may be achieved by adsorbing molecular oxygen on AMO and AMO/MgO during simultaneous irradiation in the UV-visible range. Temperature programmed desorption and oxygen isotopic exchange results support previously proposed mechanisms of photoassisted catalytic oxidation. Oxygen is adsorbed as O$\sb2\sp-$ species on the surface of the catalyst and plays an important role in this photooxidation. The observed effect of magnesium oxide suggests that hydroxyl groups promote the catalytic activity. The contamination of indoor air by volatile organic compounds (VOCs) has become a serious public health problem in recent years. The purpose of this study is to investigate photocatalytic activity of TiO$\sb2$ under kinetic conditions and the application of photocatalysts for decomposition of VOCs. The photocatalytic degradation of trichloroethylene, toluene, and triethylamine over TiO$\sb2$ (anatase) has been investigated by using a flat plate photochemical reactor. TiO$\sb2$ was used as a thin film coated on a microscope slide. The degradation of the three compounds, trichloroethylene, toluene, and triethylamine in a continuous flow mode, approximates first-order kinetics. The Langmuir-Hinshelwood kinetics have been used to rationalize the first-order behavior in solid-gas reaction. The deactivation of the catalyst also was investigated.

Heterogeneous Photocatalysis

Heterogeneous Photocatalysis
  • Author : Jennifer Strunk
  • Publisher :Unknown
  • Release Date :2020-11-04
  • Total pages :350
  • ISBN : 3527344640
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Summary : An excellent overview about modern heterogeneous photocatalysis is given in this reference: Accompanied by chemical and physical fundamentals, it presents the latest research in energy conversion and environmental depollution reactions.

Nanostructured Photocatalysts

Nanostructured Photocatalysts
  • Author : Rabah Boukherroub,Satishchandra B. OGALE,Neil Robertson
  • Publisher :Unknown
  • Release Date :2020-06-06
  • Total pages :300
  • ISBN : 9780128178379
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Summary : Nanostructured Photocatalysts: From Materials to Applications in Solar Fuels and Environmental Remediation addresses the different properties of nanomaterials-based heterogeneous photocatalysis. Heterogeneous nanostructured photocatalysis represents an interesting and viable technique to address issues of climate change and global energy supply. Sustainable hydrogen (H2) fuel production from water via semiconductor photocatalysis, driven by solar energy, is regarded as a viable and sustainable solution to address increasing energy and environmental issues. Similarly, photocatalytic reduction of CO2 with water for the production of hydrocarbons could also be a viable solution. Sections cover band gap tuning, high surface area, the short diffusion path of carriers, and more. Introduces the utilization of nanostructured materials in heterogeneous photocatalysis for hydrogen fuel production via water splitting Explains preparation techniques for different nanomaterials and hybrid nanocomposites, enabling improved sunlight absorption efficiency and enhanced charge separation Assesses the challenges that need to be addressed before this technology can be practically implemented, particularly of identifying cost-effective nanophotocatalysts

Semiconductor Photocatalysis

Semiconductor Photocatalysis
  • Author : Wenbin Cao
  • Publisher :Unknown
  • Release Date :2016-08-24
  • Total pages :676
  • ISBN : 9789535124849
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Summary : 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.

The Global Climate Change

The Global Climate Change
  • Author : Andrzej Więckowski,Eric W. Brooman
  • Publisher :Unknown
  • Release Date :2001
  • Total pages :280
  • ISBN : 1566772877
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Summary :

Textile Wastewater Treatment

Textile Wastewater Treatment
  • Author : Emriye Akcakoca Kumbasar,Aysegul Korlu
  • Publisher :Unknown
  • Release Date :2016-07-14
  • Total pages :124
  • ISBN : 9789535125426
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Summary : During the dyeing process, losses of colorants to the water sources can be toxic and mutagenic and also decreases light penetration and photosynthesis activity. In recent years, since textile industry can generate large volumes of effluents, textile wastewater treatments have received considerable attention. The aim of this book is to look into textile wastewater treatments shortly. It is designed for readers who study on textile dyeing effluent. I would like to record my sincere thanks to authors for their contributions.

Principles and Practice of Heterogeneous Catalysis

Principles and Practice of Heterogeneous Catalysis
  • Author : John Meurig Thomas,W. John Thomas
  • Publisher :Unknown
  • Release Date :2014-11-19
  • Total pages :768
  • ISBN : 9783527683789
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Summary : This long-awaited second edition of the successful introduction to the fundamentals of heterogeneous catalysis is now completely revised and updated. Written by internationally acclaimed experts, this textbook includes fundamentals of adsorption, characterizing catalysts and their surfaces, the significance of pore structure and surface area, solid-state and surface chemistry, poisoning, promotion, deactivation and selectivity of catalysts, as well as catalytic process engineering. A final section provides a number of examples and case histories. With its color and numerous graphics plus references to help readers to easily find further reading, this is a pivotal work for an understanding of the principles involved.