Destruction of Organic Contaminants and Separation of Metal Ions from Solution Using UV-illuminated and Electrically Biased TiO2 Thin Films PDF Download
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Author: Tong-hyŏn Kim
Publisher:
ISBN:
Category :
Languages : en
Pages : 326
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Book Description
Author: Tong-hyŏn Kim
Publisher:
ISBN:
Category :
Languages : en
Pages : 326
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Book Description
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 912
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Book Description
Author: Vincenzo Augugliaro
Publisher: Royal Society of Chemistry
ISBN: 1847558704
Category : Science
Languages : en
Pages : 259
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Book Description
The book deals with the environmentally friendly cleaning materials functionalized with TiO2, a widely known semiconductor giving rise to redox reactions under artificial or solar irradiation. The role of titanium dioxide in the worldwide community is introduced first. The fundamental working principles of heterogeneous photocatalysis follow and a critical section on the semiconductor bulk and surface properties open the way to the differences between TiO2 blend features with respect to analogous thin film layouts. Then Follows the main section of the book which deals with the techniques applied to manufactured commercial devices, ranging from glasses to textiles and from concrete and other construction materials to paintings. Also road asphalt and other devices, such as photocatalytic air conditioning machines are outlined. Last generation materials, not yet commercialized, and the deposition techniques applied to prepare them are also widely discussed. The final part of the book covers the difficult and modern topic of standardization and comparison of performance of photocatalytic processes and in particular the guidelines proposed by various worldwide organizations for standardization are discussed. The book covers the general matters as well as the practical applications with the supporting methods discussed in detail. This book brings together a team of highly experienced and well-published experts in the field, providing a comprehensive view of the applications of supported titanium dioxide.
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: Dionysios Demetriou Dionysiou
Publisher:
ISBN:
Category :
Languages : en
Pages : 718
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Book Description
A novel thin-film rotating-disk TiO2 photocatalytic reactor (RDPR) was developed and evaluated for the complete elimination of traces of recalcitrant halogenated aromatic and other organic contaminants in drinking water and industrial wastewater. The RDPR incorporates important features including immobilization of the catalyst on the rotating disk and the degradation and mineralization of organic impurities in a thin film of contaminated water using only TiO2 catalyst, UV radiation, and oxygen from the atmosphere. The study included detailed investigation of the hydrodynamics of flow in the RDPR, determination of the liquid carrying capacity of the disk, immobilization and characterization of the catalyst, and quantification of the light intensity distribution. Detailed experimental work accompanied by mathematical modeling investigated the effects of disk angular velocity, incident light irradiance, type and concentration of electron acceptors including hydrogen peroxide and oxygen, initial contaminant concentration, and solution matrix characteristics. The effects of these parameters were evaluated considering initial rates of degradation and extent of mineralization of the parent contaminant, reaction rate constants in the thin liquid film exposed to TiO2 and UV, and efficiencies of light utilization. Determination of the dimensionless Damkh̲ler number (Da), which accounts for the influence of mass transfer on the photocatalytic process, revealed that degradation reactions were not mass transfer limited when the disk angular velocity surpassed a critical value. The latter was mainly due to the increase of mass transfer coefficient for the transport of the contaminant from the bulk of the thin liquid film carried by the disk to the surface of the catalyst. On the other hand, photocatalytic reactions were limited by the intensity of UV radiation. The influence of initial contaminant concentration on the degradation reactions follow Langmuir-Hinshelwood kinetics. Similarly, the effect of oxygen concentration on the degradation reactions was found to obeyed the Langmuir-Hinshelwood model. The effect of hydrogen peroxide in the feed solution during the continuous-mode operation of the RDPR revealed the existence of an optimum concentration of hydrogen peroxide and that high concentrations of this electron acceptor inhibited the photocatalytic reactions mainly due to the predominance of other reactions involving scavenging of hydroxyl radicals, the major oxidizing species in the photocatalytic process.
Author: Lawrence W. Miller (Jr.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
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Book Description
Author: Altin Gjevori
Publisher:
ISBN: 9783954887460
Category :
Languages : en
Pages : 101
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Book Description
Author: Akira Fujishima
Publisher:
ISBN: 9784939051036
Category : Photocatalysis
Languages : en
Pages : 176
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Book Description
Author: Julián Blanco Gálvez
Publisher: UNESCO
ISBN:
Category : Business & Economics
Languages : en
Pages : 216
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Book Description
Solar detoxification, an innovative process of water treatment using solar technology, is ready for practical application after a decade of research and development. This is of great significance as 70 per cent of the world's population currently lives within the 'sun belt', where sustainable solar technologies are feasible--a proportion due to increase in the future. Divided into two parts, the first part addresses the theory and fundamentals of water decontamination using solar energy. This prepares .the reader for the second part of the book, which addresses practical applications and engineering processes. Although the book targets university students and post graduates it can also be read by any professional or technician as all subjects are treated in depth, with scientific rigor, but are also attractively presented with a profusion of pictures and graphics. No specific previous knowledge is necessary.
Author: Fabian I. Ezema
Publisher: Springer Nature
ISBN: 3030684628
Category : Technology & Engineering
Languages : en
Pages : 926
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Book Description
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.
