Abstract

CuS/ZnS heterojunction was formed by cation exchange of defective ZnS, and g-C₃n₄ was loaded by ultrasonic impregnation method. A CuS/ZnS/g-C₃n₄ nanocomposite with good visible light response was developed. The CuS/ZnS/g-C₃n₄ nanocomposites were analyzed and tested by various characterization methods to determine the composition of the composites, and to study their morphology and performance. The hydrogen production capacity was tested by PLS series simulated solar xenon lamp light source with 0.25M NaS and 0.35M Na2SO4 as sacrificial agents. The results show that the prepared CuS/ZnS/g-C₃n₄ nanocomposites have good activity relative to the defect zinc sulfide and CuS/ZnS. The hydrogen production effect of g-C₃n₄ containing 5wt% under visible light is 2265.87umol/g.h, which has good visible light responsiveness. The excellent performance of this material is mainly due to its enhanced visible light absorption capacity and difficult recombination of electrons and holes.

Keywords:Hetero junction; Photo-responsive; Nanocomposite material; Visible light