Citation: Fu-Kai ZHENG, Zong-Lin LI, Yu-Qi CAO, Hui ZHANG, Xin CAO, Jian-Hua SUN. Cobalt and Carbon Co-doped Carbon Nitride for Enhanced Photocatalytic Hydrogen Evolution[J]. Chinese Journal of Inorganic Chemistry, ;2021, 37(11): 2029-2036. doi: 10.11862/CJIC.2021.226 shu

Cobalt and Carbon Co-doped Carbon Nitride for Enhanced Photocatalytic Hydrogen Evolution

School of Chemistry and Environmental Engineering, Institute of Advanced Functional Materials for Energy, Jiangsu University of Technology, Changzhou, Jiangsu 213001, China

Corresponding author: Hui ZHANG, zhanghui@jsut.edu.cn
Received Date: 19 May 2021
Revised Date: 16 July 2021

Figures(8)

The photocatalytic activity of carbon nitride is greatly limited by the low visible-light utilization and fast photocarries recombination. Here, a new cobalt and carbon co-doped carbon nitride (CNCoC) was prepared via a one -step thermal condensation method using vitamin B12 (VB12) as the cobalt and carbon source mixed with urea. The characterization results indicate that the cobalt and carbon co-doping does not change the morphology, skeleton structure or functional groups of carbon nitride. However, the co-doping contributes to the enhanced surface area, optimized band structure and increased visible-light absorption. More importantly, compared to carbon doping, the synergistic effect of cobalt and carbon co-doping leads to more efficient photocarrier separation and transport. As a result, the photocatalytic hydrogen evolution rate of CNCoC-6 prepared with 6 mg VB12 reached 56.1 μmol·h^-1 under visible light irradiation, which was 3.05 times that of pure carbon nitride (CN). While the carbon doped carbon nitride (CNC-6) only exhibited a hydrogen evolution rate to be 2.55 times that of CN.
- carbon nitride,
- photocatalysis,
- co-doped,
- water splitting,
- hydrogen evolution
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