Tin disulfide based ternary composites for visible light driven photoelectrochemical water splitting

Abstract Photoelectrochemical (PEC) water splitting could potentially solve the global energy crisis and environmental pollution. In the present work, ternary composites consisting of 2D nanomaterials of SnS 2 , reduced graphene oxide (RGO), and mesoporous graphitic carbon nitride (mpg-C 3 N 4 ) are synthesized with layered architecture. The photocurrent density of the ternary composite is 1.45 mA/cm 2  at 1.23 V vs RHE, which is over 23 times higher than that of pure SnS 2 . The superior photocatalytic activity of mpg-C 3 N 4 /SnS 2 /RGO composite is attributed to synchronous effects of all the materials leading to enhanced electron-hole pair separation, as well as increased visible-light absorption.