Journal ArticleDOI
Photocatalysis on TiO2 Surfaces - Principles, Mechanisms, and Selected Results
TLDR
In this article, the authors focus on interfacial processes and summarize some of the operating principles of heterogeneous photocatalysis systems, including the electron transfer and energy transfer processes in photocatalytic reactions.Abstract:
In 1972, Fujishima and Honda discovered the photocatalytic splitting of water on TiO{sub 2} electrodes. This event marked the beginning of a new era in heterogeneous photocatalysis. Since then, research efforts in understanding the fundamental processes and in enhancing the photocatalytic efficiency of TiO{sub 2} have come from extensive research performed by chemists, physicists, and chemical engineers. Such studies are often related to energy renewal and energy storage. In recent years, applications to environmental cleanup have been one of the most active areas in heterogeneous photocatalysis. This is inspired by the potential application of TiO{sub 2}-based photocatalysts for the total destruction of organic compounds in polluted air and wastewaters. There exists a vast body of literature dealing with the electron transfer and energy transfer processes in photocatalytic reactions. A detailed description of these processes is beyond the scope of this review. Here, the authors tend to focus on interfacial processes and to summarize some of the operating principles of heterogeneous photocatalysis. In section 2, the authors first look at the electronic excitation processes in a molecule and in a semiconductor substrate. The electronic interaction between the adsorbate molecule and the catalyst substrate is discussed in terms of the catalyzed ormore » sensitized photoreactions. In section 3, thermal and photocatalytic studies on TiO{sub 2} are summarized with emphasis on the common characteristics and fundamental principles of the TiO{sub 2}-based photocatalysis systems. In section 4, they address the research effort in the electronic modification of the semiconductor catalysts and its effect on the photocatalytic efficiency. Several representative examples will be presented including the Schottky barrier formation and modification at metal-semiconductor interfaces. Some concluding remarks and future research directions will be given in the final section. 160 refs.« lessread more
Citations
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Journal ArticleDOI
Continuous-mode photocatalytic degradation of chlorinated phenols and pesticides in water using a bench-scale TiO2 rotating disk reactor
Dionysios D. Dionysiou,Amid P. Khodadoust,Ann M. Kern,Makram T. Suidan,Isabelle Baudin,Jean Michel Laîné +5 more
TL;DR: In this paper, a continuous flow TiO 2 rotating disk photocatalytic reactor (RDPR) was used for the degradation of phenol, chlorinated phenols, and lindane.
Journal ArticleDOI
Photocatalytic performance of tetragonal and cubic β-In2S3 for the water splitting under visible light irradiation
Xianliang Fu,Xuxu Wang,Zhixin Chen,Zizhong Zhang,Zhaohui Li,Dennis Y.C. Leung,Ling Wu,Xianzhi Fu +7 more
TL;DR: Tetragonal and cubic β-In 2 S 3 were synthesized by hydrothermal method and their photocatalytic activity for hydrogen evolution from water under visible light irradiation (λ ǫ>400nm) was evaluated.
Journal ArticleDOI
Oxygen defects and formation of Ce3+affecting the photocatalytic performance of CeO2nanoparticles
TL;DR: In this paper, the photocatalytic activity of CeO2 nanoparticles was investigated with methyl orange as the reference pollutant and the results showed that vacuum annealed ceria exhibits better photocatalysis activity in the degradation of methyl orange under UV and visible light as compared to the air-annealed samples.
Journal ArticleDOI
Facile Oxidative Conversion of TiH2 to High-Concentration Ti3+-Self-Doped Rutile TiO2 with Visible-Light Photoactivity
TL;DR: In comparison to pristine anatase TiO2, the Ti(3+) self-doped rutile sample exhibited remarkably enhanced visible-light photocatalytic degradation on organic pollutants in water.
Journal ArticleDOI
Latest progress in hydrogen production from solar water splitting via photocatalysis, photoelectrochemical, and photovoltaic-photoelectrochemical solutions
TL;DR: In this paper, a review summa-rizes the very recent progress (mainly in the last 2-3 years) on three major types of solar hydrogen production systems: particulate photocatalysis (PC), photoelectrochemical (PEC), and photovoltaic-photo-electronchemical hybrid systems.
References
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Book
Principles of Instrumental Analysis
TL;DR: In this article, the authors present an overview of the main components of optical atomic spectrometers and their application in the field of surface characterization by Spectroscopy and Microscopy.
Book
Photocatalysis: Fundamentals and Applications
Ezio Pelizzetti,Nick Serpone +1 more
TL;DR: In this paper, the reader is first introduced to the meaning of photocatalysis and subsequently taken through the essentials of photochemistry towards bridging it to semiconductor materials, followed by thermodynamic and kinetic aspects.
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