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Photocatalysis

About: Photocatalysis is a(n) research topic. Over the lifetime, 67088 publication(s) have been published within this topic receiving 2145233 citation(s). The topic is also known as: photocatalyst.

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Journal ArticleDOI: 10.1126/SCIENCE.1061051
Ryoji Asahi1, Takeshi Morikawa1, T. Ohwaki1, Koyu Aoki1  +1 moreInstitutions (1)
13 Jul 2001-Science
Abstract: To use solar irradiation or interior lighting efficiently, we sought a photocatalyst with high reactivity under visible light. Films and powders of TiO 2- x N x have revealed an improvement over titanium dioxide (TiO 2 ) under visible light (wavelength 2 has proven to be indispensable for band-gap narrowing and photocatalytic activity, as assessed by first-principles calculations and x-ray photoemission spectroscopy.

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Topics: Photocatalysis (58%), Titanium dioxide (56%), Visible spectrum (55%) ...read more

10,756 Citations


Journal ArticleDOI: 10.1021/CR00035A013
01 May 1995-Chemical Reviews
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.« less

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Topics: Photocatalysis (50%)

10,191 Citations


Journal ArticleDOI: 10.1016/S1389-5567(00)00002-2
Abstract: Scientific studies on photocatalysis started about two and a half decades ago. Titanium dioxide (TiO 2 ), which is one of the most basic materials in our daily life, has emerged as an excellent photocatalyst material for environmental purification. In this review, current progress in the area of TiO 2 photocatalysis, mainly photocatalytic air purification, sterilization and cancer therapy are discussed together with some fundamental aspects. A novel photoinduced superhydrophilic phenomenon involving TiO 2 and its applications are presented.

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Topics: Photocatalysis (55%), Titanium dioxide (50%)

6,367 Citations


Open access
01 Jan 2008-
Abstract: Abstract Scientific studies on photocatalysis started about two and a half decades ago. Titanium dioxide (TiO 2 ), which is one of the most basic materials in our daily life, has emerged as an excellent photocatalyst material for environmental purification. In this review, current progress in the area of TiO 2 photocatalysis, mainly photocatalytic air purification, sterilization and cancer therapy are discussed together with some fundamental aspects. A novel photoinduced superhydrophilic phenomenon involving TiO 2 and its applications are presented.

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Topics: Photocatalysis (63%), Titanium dioxide (59%)

6,294 Citations


Journal ArticleDOI: 10.1126/SCIENCE.1200448
Xiaobo Chen1, Lei Liu1, Peter Y. Yu1, Samuel S. Mao1Institutions (1)
11 Feb 2011-Science
Abstract: When used as a photocatalyst, titanium dioxide (TiO(2)) absorbs only ultraviolet light, and several approaches, including the use of dopants such as nitrogen, have been taken to narrow the band gap of TiO(2). We demonstrated a conceptually different approach to enhancing solar absorption by introducing disorder in the surface layers of nanophase TiO(2) through hydrogenation. We showed that disorder-engineered TiO(2) nanocrystals exhibit substantial solar-driven photocatalytic activities, including the photo-oxidation of organic molecules in water and the production of hydrogen with the use of a sacrificial reagent.

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Topics: Titanium dioxide (57%), Photocatalysis (57%), Ultraviolet light (56%)

4,533 Citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2022478
20216,778
20206,536
20196,581
20186,178
20175,883

Top Attributes

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Topic's top 5 most impactful authors

Huaming Li

242 papers, 13.6K citations

Jiaguo Yu

220 papers, 45.5K citations

Detlef W. Bahnemann

153 papers, 8.7K citations

Jinhua Ye

146 papers, 10.5K citations

Hui Xu

137 papers, 8.6K citations

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