Novel photocatalyst, its preparation, and method for producing hydrogen using the same

摘要

PCT No. PCT/KR96/00161 Sec. 371 Date Mar. 10, 1998 Sec. 102(e) Date Mar. 10, 1998 PCT Filed Sep. 17, 1996 PCT Pub. No. WO97/12668 PCT Pub. Date Apr. 10, 1997The present invention relates to a photocatalyst for producing hydrogen, harmless to the environment and by which a large quantity of hydrogen is efficiently produced at low temperatures without using any organic promoter, represented by the following formula:Cs(a)X(c)/T(b)wherein "a" represents a percentage by weight of impregnated Cs on the basis of the weight of a carrier, being limited up to 6.0; "X" is a promoter selected from Ni, Co and Fe; "c" represents a percentage by weight of the promoter on the basis of the total weight of Cs and the promoter, being limited up to 50.0; "T" is the carrier consisting of a zinc sulfide mixture comprising an inorganic compound and zinc sulfide with the molar ratio of zinc:sulfur ranging from 1:0.1 to 1:2.8; and "b" represents a percentage by weight of the inorganic compound on the basis of the total amount of the ZnS mixture, being limited up to 50. The present invention also relates to a method for preparing the photocatalyst and to a method for producing hydrogen using the photocatalyst.