Visible-Light-Driven Photocatalytic Cellulose-to-H2 Conversion by MoS2 /ZnIn2 S4 Photocatalyst with Cellulase Assistance.

Abstract

Visible-light-driven photocatalytic cellulose-to-H2 conversion system was successfully designed by using MoS2 /ZnIn2 S4 as the photocatalyst and cellulase as the enzyme catalyst. At first, the cellulose was converted to glucose by cellulase. The generated glucose acted as an efficient hole trapper and electron donor, which was further converted into H2 through photocatalytic reaction over MoS2 /ZnIn2 S4 under visible light irradiation. The optimum H2 generation rate achieved under visible light irradiation (λ>420 nm) was 12.2 μmol ⋅ h-1 ⋅ g-1 in the presence of 100 mg of 3 % MoS2 /ZnIn2 S4 , 100 mg cellulase and 2 g poplar wood chip. These results open up a new possibility for the development of efficient visible-light-responding photocatalytic cellulose to H2 conversion system that combine photocatalysis and enzyme technology.