High-efficiency ultrathin porous phosphorus-doped graphitic carbon nitride nanosheet photocatalyst for energy production and environmental remediation

Li, Daguang ¹Wen, Chenghui ¹Huang, Jiaxing ²Zhong, Jiapeng ¹Chen, Ping ¹Liu, Haijin ³Wang, Zhongquan ¹Liu, Yang ²Lv, Wenying ¹Liu, Guoguang¹

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作者信息

1. Guangdong Univ Technol
2. Guangdong Univ Petrochem Technol
3. Henan Normal Univ
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Abstract

Herein, we designed and constructed an ultrathin porous phosphorus-doped g-C3N4 nanosheet (PCN) bifunctional photocatalytic system for efficient production of H2O2 and degradation of non-steroidal anti-inflammatory drugs in aqueous environment. The phosphorus atoms introduced in g-C3N4 significantly improved the utilization of light, enhanced the adsorption capacity for O-2, and inhibited the recombination of photogenerated carriers, thereby boosting the photocatalytic performance. Consequently, the optimized PCN photocatalyst produced 285.34 mu M of H2O2 under blue LED light irradiation, which was 3.41 times that of pristine g-C3N4, and its degradation rate constant for diclofenac (0.1248 min(-1)) was 46.22 times that of the g-C3N4. Density functional theory (DFT) calculations suggested that phosphorus doping modulated the local electronic structure of gC(3)N(4), which improved the electron-hole separation and promoted the O-2 reduction reaction. This work comprehensively reveals the mechanisms of phosphorus doping on g-C3N4, while offering a promising strategy for addressing current energy demands and environmental remediation concerns.

Key words

g-C3N4/P doping/DFT calculations/NSAIDs degradation/H2O2 production/VISIBLE-LIGHT IRRADIATION/HYDROGEN-PEROXIDE/G-C3N4 NANOSHEETS/PHOTON-ABSORPTION/ONE-STEP/DEGRADATION/DICLOFENAC/FENTON/NITROGEN/ADSORPTION

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量59

参考文献量64

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