Showing papers by "Akira Fujishima published in 1984"
TL;DR: In this article, the current doubling behavior of alcohols was studied on an n-type ZnO polycrystalline electrode and it was found that the photocurrent was almost doubled in alkaline solution.
Abstract: The current doubling behavior of alcohols was studied on an n-type ZnO polycrystalline electrode. The increase in photocurrent due to alcohols on the ZnO depended on pH of the solution. The photocurrent was almost doubled in alkaline solution. It was found that the ZnO photoanode dissolved in the neutral aqueous solution but the dissolution reaction of ZnO was completely suppressed in alkaline solution at a sufficiently large pH. From the experimental results obtained by the rotating ring disk electrode and gas chromatographic and mass spectrometric analyses, a mechanism of the current-doubling reaction is proposed.
27 citations
Patent•
06 Mar 1984
TL;DR: In this paper, the authors used a photocatalyst activated in accordance with light energy in a method for removing harmful substances contained in the waste matter in order to purify waste matter economically and easily.
Abstract: PURPOSE: To purify waste matter economically and easily by using a photocatalyst activated in accordance with light energy in a method for removing harmful substances contained in the waste matter. CONSTITUTION: The waste samples introduced from a sample inlet 51 are introduced to a reactor 31 via a circulator 52. The reactor consists of light permeable material and a photocatalyst 41 is set at the bottom part. A semiconductor such as TiO 2 and ZnO and a molecular photocatalyst such as porphyrin are used as the photocatalyst. The waste introduced in the reactor is photodecomposed with the light which is emitted from a light source 61 and introduced through a lens 71 and removed and the purified substances are discharged from a sample outlet 53. COPYRIGHT: (C)1985,JPO&Japio
18 citations
TL;DR: In this paper, a methode qui permet de mettre en evidence l'existence d'une couche duplex de passivation is described. But this methode does not permit the use of passivation.
Abstract: Description de cette methode qui permet de mettre en evidence l'existence d'une couche duplex de passivation
13 citations
TL;DR: In situ PAS techniques have been utilized in the study of the passive film on iron by the potentiodynamic, coulostatic, open-circuit decay and galvanostatic methods, and the results have been successfully interpreted by the two-layer model as mentioned in this paper.
13 citations
01 Jan 1984
TL;DR: In this article, the authors examined the spectral sensitization process by measuring the fluorescence intensities and the photocurrents caused by rhodamine B esterically bound with the surface species of SnO2.
Abstract: Spectral sensitization process was examined by measuring the fluorescence intensities and the photocurrents caused by rhodamine B esterically bound with the surface species of SnO2. It was found that about 20% of its fluorescence intensity were reduced by the Sn02 substrate, and this value was well coincident with the maximum quantum efficiency of the sensitized photocurrent. From the results the charge transfer mechanism of supersensitization is discussed.
4 citations
TL;DR: In this article, the temperature measurement technique has been used to determine the quantum efficiency of the CdS photoelectrode and it has been found that decreases in the quantum energy efficiency can be monitored easily by this method.
Abstract: CdS photoelectrodes dissolve during photoanode reactions in a supporting electrolyte solution, and the quantum efficiency changes due to sulfur deposition Temperature measurement technique has been used in this work to determine the quantum efficiency of the CdS photoelectrode It has been found that decreases in the quantum efficiency can be monitored easily by this method
2 citations