Synchronous construction of CoS2 in-situ loading and S doping for g-C3N4: Enhanced photocatalytic H2-evolution activity and mechanism insight

By Yazhou Zhang, Jinwen Shi, Zhenxiong Huang, X. Guan, Shichao Zong, Cheng Cheng, Botong Zheng, Liejin Guo. 2020

147 citations recorded by the source corpus.

Abstract Considering the fact of the cost control in photocatalysis, it is significant to develop the noble-metal-free photocatalysis for H2 evolution. Herein, CoS2 in-situ loading and S doping for g-C3N4 were synchronously constructed by hydrothermal and sulfidation processes. With systematical physicochemical characterizations, it was found that partial N atoms in g-C3N4 were replaced by S atoms, improving the visible-light absorption ability for more generation of photo-generated carriers. CoS2 as an effective noble-metal-free H2-evolution cocatalyst induced and captured photo-generated electrons for promoting separation of photo-generated carriers synergistically with S doping. More contact between CoS2 and g-C3N4 were formed by the in-situ growth of CoS2 nanosheets on the surface of g-C3N4 nanosheets. It was important that Co-S bonding between CoS2 and S-doped g-C3N4 was built by the synchronous construction of CoS2 in-situ loading and S doping, strengthening the directed transfer of photo-generated electrons from S-doped g-C3N4 to CoS2. Accordingly, the synergetic function of CoS2 in-situ loading and S doping effectively elevated the noble-metal-free photocatalytic activity of g-C3N4 for H2 evolution under visible-light irradiation.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/98f7946c1172227c2002c2fb5dc1d986a6a0df03