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Akira Fujishima

Other affiliations: Kanagawa University, Jilin University, University of Tokyo  ...read more
Bio: Akira Fujishima is an academic researcher from Tokyo University of Science. The author has contributed to research in topics: Photocatalysis & Diamond. The author has an hindex of 70, co-authored 299 publications receiving 69335 citations. Previous affiliations of Akira Fujishima include Kanagawa University & Jilin University.


Papers
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Journal ArticleDOI
TL;DR: In this paper, soliton-type superlattices were directly observed on the (0001) face of C 70 single crystals using atomic force microscopy, and the images showed a stressed surface, with parallel fringes along the 〈2 1 0/0/0'' direction, which represent a (p 3 × 1) superstructure, with p = 14∼60 in the à −010´ direction.

1 citations

Book ChapterDOI
26 Aug 2021
TL;DR: In this paper, the authors discuss insights of photocatalysis in organic water pollutant treatment at different pollutants (textile dye, pharmaceutical drug and pesticide) using TiO2 as benchmarking photocatalyst.
Abstract: Power-free, light-driven catalysis-based water treatment is a green approach compared to chemical-based water treatment techniques. In this context, a broad range of photocatalytic material is demonstrated for organic water pollutant treatment. However, understanding catalysis reaction at pollutant environment and by-product formation are ambiguous. In this view, this chapter discusses insights of photocatalysis in organic water pollutant treatment at different pollutants (textile dye, pharmaceutical drug and pesticide) using TiO2 as benchmarking photocatalyst. The analytical tools for evaluating the light-active and colourless pollutant before and after photocatalytic experiments are elaborately discussed. A comprehensive discussion on TiO2-based photocatalysis at different strategies such as metal doping, coated on host surface, and varying pH of the solution are clearly explaining the interrelationship between properties of semiconductor catalysts, processing parameters and photocatalytic performance. This chapter is resourceful for fundamental researchers on how to choose the photocatalysis experimental techniques for organic water pollutant treatment.

1 citations


Cited by
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Journal ArticleDOI

[...]

08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

Journal ArticleDOI
24 Oct 1991-Nature
TL;DR: In this article, the authors describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency.
Abstract: THE large-scale use of photovoltaic devices for electricity generation is prohibitively expensive at present: generation from existing commercial devices costs about ten times more than conventional methods1. Here we describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency. The device is based on a 10-µm-thick, optically transparent film of titanium dioxide particles a few nanometres in size, coated with a monolayer of a charge-transfer dye to sensitize the film for light harvesting. Because of the high surface area of the semiconductor film and the ideal spectral characteristics of the dye, the device harvests a high proportion of the incident solar energy flux (46%) and shows exceptionally high efficiencies for the conversion of incident photons to electrical current (more than 80%). The overall light-to-electric energy conversion yield is 7.1-7.9% in simulated solar light and 12% in diffuse daylight. The large current densities (greater than 12 mA cm-2) and exceptional stability (sustaining at least five million turnovers without decomposition), as well as the low cost, make practical applications feasible.

26,457 citations

Journal ArticleDOI
Ryoji Asahi1, Takeshi Morikawa1, T. Ohwaki1, Koyu Aoki1, Y. Taga1 
13 Jul 2001-Science
TL;DR: Film and powders of TiO2-x Nx have revealed an improvement over titanium dioxide (TiO2) under visible light in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface.
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.

11,402 citations