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
Hierarchical electrospun nanofibers for energy harvesting, production and environmental remediation
Palaniswamy Suresh Kumar,Palaniswamy Suresh Kumar,Jayaraman Sundaramurthy,Jayaraman Sundaramurthy,Subramanian Sundarrajan,Veluru Jagadeesh Babu,Gurdev Singh,Suleyman I. Allakhverdiev,Seeram Ramakrishna +8 more
TL;DR: In this paper, the authors present the synthesis of 1D nanostructured fibers made via electrospinning and their applications in photovoltaics, photocatalysis, hydrogen energy harvesting and fuel cells.
Journal ArticleDOI
New approaches to prepare nitrogen-doped TiO2 photocatalysts and study on their photocatalytic activities in visible light
TL;DR: In this article, Nitrogen-doped TiO2 nanocatalysts were successfully synthesized by adjusting a pH range using the ammonium nitrate and ammonia water as the nitrogen source.
Journal ArticleDOI
Degradation and mineralization of bisphenol A by mesoporous Bi2WO6 under simulated solar light irradiation.
TL;DR: It was found that the crystallinity of the catalysts played an important role on their degradation capacity to Bisphenol A (BPA), and Bi2WO6 catalyst showed the highest photocatalytic activity to degrade BPA under simulated solar light irradiation.
Journal ArticleDOI
Pore-Wall Chemistry and Photocatalytic Activity of Mesoporous Titania Molecular Sieve Films
TL;DR: In this paper, a transparent zeolite-like mesoporous TiO2 nanocrystalline thin films with high photocatalytic activity were synthesized via a surfactant-templated method.
Journal ArticleDOI
Kinetics and mechanisms of charge transfer processes in photocatalytic systems: A review
TL;DR: In this paper, a review of the charge carrier transfer processes in photocatalytic processes is presented, including charge generation, charge trapping, charge recombination, and electron and hole transfer.
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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