Phosphorous doped carbon nitride nanobelts for photodegradation of emerging contaminants and hydrogen evolution

By Shuaijun Wang, Fengting He, Xiaoli Zhao, Jinqiang Zhang, Z. Ao, Hong Wu, Yu Yin, Lei Shi, Xinyuan Xu, Chaocheng Zhao and 2 more. Applied Catalysis B: Environmental, 2019

189 citations recorded by the source corpus.

Abstract 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 (P CN NB). 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 P CN NB, 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 CN NB. Density functional theory (DFT) calculations were also conducted to provide insights into the mechanism.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/daf2cb6ce8e8ed4456eef52a7f177c1d690c76d7