NOVEL PHOTOCATALYST, PREPARATION THEREFOR AND METHOD FOR PRODUCING HYDROGEN USING THE SAME

摘要

The present invention relates to a novel 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)H(c)/S(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; "H" 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; "S" 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. Also, the present invention relates to a method for preparing the photocatalyst and to a method for producing hydrogen using the photocatalyst.