Abstract
Photocatalytic activity of Pt-loaded metal sulfide with organic dye for the H2 production from aqueous solution containing Na2S–K2SO3 as a sacrificial reagent was investigated. Hydrogen formation rate was improved by the dye-adsorption onto SnS photocatalyst by using Cr-tetraphenylporphyrin (Cr-TPP). SnS loaded with Pt exhibits H2 formation up to 800 nm when Na2S and K2SO3 is used as sacrificial reagent, and it was found that the H2 formation rate is much improved by the adsorption of Cr-TPP. In particular, the dye-adsorption effect was significantly appeared in the wavelength range less than 500 nm, which is in good agreement with the Soret band absorption of Cr-TPP.
