| 摘要 |
<p>The present invention relates to a method for preparing a CdS photocatalyst (photocatalyst system) used in photolysis of water and a method for producing hydrogen in the presence of CdS photocatalyst. A method for preparing a CdS photocatalyst represented by general formula (I): m(a)/Cd[M(b)]S, comprising the steps of: dissolving Cd-containing and M-containing compounds in water in such an amount that the mol % of M ranges from 0.001 to 20.00; adding one H2S or Na2S as a reactant in the solution with stirring to precipitate Cd[M]S; washing the precipitate with water and vacuum-drying the precipitate in a nitrogen and thermostat at 105-150 °C for 1.5-3.0 hours; doping a liquid m-containing compound to this precipitate in such an amount that the % by weight of m ranges from 0.10 to 5.00. In said formula m represents a doped metal element as an electron acceptor selected from the group of Ni, Pd, Pt, Fe, Ru, Co or an oxidized compound of these metals; a represents a percentage by weight of m, ranging from 0.10 to 5.00; M is a promoter selected from the group consisting of V, Cr, Al, P, As, Sb and Pb; b represents mol % of M/(M+Cd), ranging from 0.001 to 20.00. In accordance with a further aspect of the present invention, there is provided a method for producing hydrogen, in which visible light adjusted by light filter or sunlight is irradiated onto a suspension of the photocatalyst in water to which 0.05-1.00 mol of Na2S (as an electron donor) and 0.05-1.00 mol of Na2SO3 (as a reducing agent) are added.</p> |
