VISIBLE LIGHT ACTIVE SULFIDE SOLID SOLUTION PHOTOCATALYST IMPROVED IN ACTIVITY EFFICIENCY AND ACTIVITY STABILITY AND PRODUCING HYDROGEN BY OPTICAL DECOMPOSITION OF WATER AND ITS MANUFACTURING METHOD

摘要

PPROBLEM TO BE SOLVED: To provide an optical water decomposing photocatalyst capable of effectively converting visible spectrum light of solar rays to HSB2/SB. PSOLUTION: The optical water decomposing photocatalyst comprising a sulfide solid solution comprises a composition represented by the formula: (CuAg)SBx/SBInSB2x/SBZnSB2(1-2x)/SBSSB2/SB(wherein x is 0.150.02) obtained under a synthesizing condition including a heat treatment process of a combination condition of a temperature range of 800150C and a treatment time of 3-37 hr and has characteristics wherein a specific surface area due to a BET isothermal adsorption method is 0.9-3.6 mSP2/SP/g and a band gap is 2.00.1 and activity producing hydrogen by the optical decomposition of an aqueous solution containing a sulfur compound. PCOPYRIGHT: (C)2005,JPO&NCIPI