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
A Density Functional Theory + U Study of Oxygen Vacancy Formation at the (110), (100), (101), and (001) Surfaces of Rutile TiO2
TL;DR: In this paper, the authors investigated the vacancy formation at the (110, (100), (001), and (101) surfaces of rutile TiO2 using density functional theory with an on-site correction for strongly correlated systems.
Journal ArticleDOI
First-principles study on transition metal-doped anatase TiO2
TL;DR: Under O-rich growth condition, the preparation of Co-, Cr-, and Ni-doped TiO2 becomes relatively easy in the experiment due to their negative impurity formation energies, which suggests that these doping systems are easy to obtain and with good stability.
Journal ArticleDOI
Effect of deposition of Ag on TiO2 nanoparticles on the photodegradation of Reactive Yellow-17
TL;DR: The Ag-TiO(2) catalyst was evaluated for their photocatalytic activity towards the degradation of Reactive Yellow-17 (RY-17) under UV and visible light irradiations and the enhanced degradation was obtained with Ag-deposited TiO( 2).
Journal ArticleDOI
A single crystalline porphyrinic titanium metal-organic framework.
Shuai Yuan,Tian-Fu Liu,Dawei Feng,Jian Tian,Kecheng Wang,Jun-Sheng Qin,Qiang Zhang,Ying-Pin Chen,Mathieu Bosch,Lanfang Zou,Simon J. Teat,Scott J. Dalgarno,Hong-Cai Zhou +12 more
TL;DR: The synthesis of a single crystalline porphyrinic titanium MOF, namely PCN-22, represents an important step towards mimicking dye sensitized TiO2 in MOFs.
Journal ArticleDOI
Photocatalytic properties of titania powders prepared by hydrothermal method
TL;DR: In this article, the photocatalytic behavior of synthesized TiO 2 powders is studied in the reaction of phenol photodegradation in water and optimal characteristics of these materials are explored.
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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