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
Inorganic-modified semiconductor TiO2 nanotube arrays for photocatalysis
TL;DR: In this article, a review of the key mechanisms of photocatalysis, highlights the recent developments pertaining to pure TiO2 nanotube arrays and modified by non-metals, metals and semiconductors, and their applications in the photocatalytic degradation of organic dyes.
Journal ArticleDOI
Reaction of O2 with Subsurface Oxygen Vacancies on TiO2 Anatase (101)
Martin Setvin,Ulrich Aschauer,Philipp Scheiber,Ye-Fei Li,Weiyi Hou,Michael Schmid,Annabella Selloni,Ulrike Diebold +7 more
TL;DR: With scanning tunneling microscopy, the nature of O2 molecules on the surface of anatase (titanium oxide, TiO2) doped with niobium are observed, transformed, and identified in conjunction with theory.
Journal ArticleDOI
Recent catalytic routes for the preparation and the upgrading of biomass derived furfural and 5-hydroxymethylfurfural
Chunping Xu,Emilia Paone,Emilia Paone,Daily Rodríguez-Padrón,Rafael Luque,Rafael Luque,Francesco Mauriello +6 more
TL;DR: The conversion of biomass derived FUR and HMF through unconventional (transfer hydrogenation, photocatalytic and electrocatalytic) catalytic processes promoted by heterogeneous catalytic systems are discussed.
Journal ArticleDOI
Theoretical Insights into Photoinduced Charge Transfer and Catalysis at Oxide Interfaces
TL;DR: In this article, the authors focus on processes that are essential in terms of photovoltaic and photocatlytic cells, and focus on the processes that can be improved.
Journal ArticleDOI
Study on UV-LED/TiO2 process for degradation of Rhodamine B dye
Thillai Sivakumar Natarajan,Molly Thomas,Kalithasan Natarajan,Hari C. Bajaj,Rajesh J. Tayade +4 more
TL;DR: In this article, a detailed degradation pathway has been suggested, which was based on the electrospray ionization mass spectrometry (ESI-MS) analysis, and the degradation of Rhodamine B (RhB) dye occurred via N-de-ethylation process.
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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