Phosphorous doped carbon nitride nanobelts for photodegradation of emerging contaminants and hydrogen evolution
Shuaijun Wang, Edith Cowan UniversityFollow
Xiaoli Zhao, Edith Cowan UniversityFollow
Jinqiang Zhang, Edith Cowan UniversityFollow
Hong Wu, Edith Cowan UniversityFollow
Yu Yin, Edith Cowan UniversityFollow
Lei Shi, Edith Cowan UniversityFollow
Xinyuan Xu, Edith Cowan UniversityFollow
Hongqi Sun, Edith Cowan UniversityFollow
School of Engineering
This work was partially supported by the National Science and Technology Major Project (NO. 2016ZX05040003), the Fundamental Research Funds for the Central Universities (NO. 17CX06027), ARC Discovery Projects (DP150103026 and DP170104264) and the CSC scholarship (201806450064).
ARC : DP150103026, ARC : DP170104264
Photocatalysis has demonstrated great potentials for both environmental remediation and green energy production. In this study, a simple solvothermal template-free approach was employed for the first time to synthesize phosphorous doped carbon nitride nanobelt (PCNNB). Advanced characterizations, for instance, 13C NMR, 31P NMR, and XPS results indicated that P was substitutionally doped at the corner-carbon of the carbon nitride frameworks. The introduction of P dopants inhibited the polymerization between NH2 groups within PCNNB, enabling the decrease in nanobelt width for the exposure of more active sites. Therefore, the optimized P-CN-NB-2 (derived from 0.2 mM H3PO4) rendered enhanced p-hydroxybenzoic acid (HBA) degradation nearly 66-fold higher than bulk g-C3N4, among the most efficient g-C3N4-based photocatalysts as reported. In addition, the P-CN-NB-1 (derived from 0.02 mM H3PO4) exhibited about 2 times higher H2 evolution rate than CNNB. Density functional theory (DFT) calculations were also conducted to provide insights into the mechanism.