A Novel of Rod-Type Banisn-Graphene Decorated Tio2 Composite as a Co-Catalyst to Improve Visible-Light Driven H2 Evolution on Lactic Acid and Tea

Abstract

A novel BaNiSn-Graphene oxide decorated TiO2 Composite (BaNiSn-GT) has beeen synthesized using a simple ultrasonic method to enhance the visible-light-driven H2 evolution. The unique structure between the interfaces of BaNiSn-Graphene and TiO2 provides graphene oxide of contact and excellent electron transfer for H2 evolution activity. The BaNiSn-GT co-catalyst showed that the BaNiSn-GT displayed the highest H2-production rate of 1012 μmol h-1 g-1, which was about 4 times that of pure BaNiSn and BaNiSn-G under visible light irradiation with scavenger media. Moreover, the higher photocurrent density of BaNiSn-GT provided evidence for the inhibition of electron-hole recombination, which leads to a longer lifetime of the photogenerated carriers. The mechanism of the photocatalytic H2 evolution of BaNiSn-GT based on a full physicochemical characterization was proposed. This study provides new insight into the efficient hydrogen-evolution of graphene-based photocatalysts.

Keywords: Rod-type, Graphene, Lactic acid, TEA, H2 evolution