Influence of cobalt phthalocyanine: Deposited onto the particles of mixed Cd/CuxS suspensions on photocatalytic evolution of hydrogen from aqueous solutions of Na2S

Abstract

Deposition of water-insoluble cobalt phthalocyanine CoPc onto the particles of mixed suspensions of CdS and CuxS can increase the rate of photoinduced evolution of H2 from Na2S and Na2SO3 solutions. At [Na2S]=5×10−2 M, the rate of photocatalytic reaction is almost doubled upon deposition of 6.4×10−10 mol CoPc onto 4×10−5 mol of CdS and of 2.9×10−8 mol of CoPc onto 10−5 mol of CuxS. At [Na2S]=10−1 M, which is close to the optimal concentration of Na2S, the deposition of CoPc can provide only a 30% increase of the reaction rate.