Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 257, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.117931
Keywords
Photocatalysis; Carbon nitride; P-doping; HBA degradation; Hydrogen production
Funding
- National Science and Technology Major Project [2016ZX05040003]
- Fundamental Research Funds for the Central Universities [17CX06027]
- ARC Discovery Projects [DP150103026, DP170104264]
- CSC scholarship [201806450064]
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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, C-13 NMR, P-31 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 H-2 evolution rate than CN-NB. Density functional theory (DFT) calculations were also conducted to provide insights into the mechanism.
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