文献类型：期刊文献

英文题名：Nitrogen-defective protonated porous C3N4 nanosheets for enhanced photocatalytic hydrogen production under visible light

作者：Zheng, Chunjie[1];Guo, Yibo[1];Zhang, Chunjuan[1];Cao, Xuejun[1];Wan, Junfen[1]

机构：[1]East China Univ Sci & Technol, Sch Biotechnol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：365

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20244817441677);WOS:【SCI-EXPANDED(收录号:WOS:001411329300001)】；

基金：Support This work is financially supported by Sinopec Shanghai Petrochem-ical Company Limited (No. 30450000-22-ZC0607-0031) , and we thank the SCI-GO ( www.sci-go.com ) for the EIS and TEM analysis.

语种：英文

外文关键词：Nitrogen-defects; Protonation; Carbon nitride; Photocatalytic; Hydrogen evolution reaction

摘要：Defect engineering with morphology control is strategy to tailoring photocatalytic performance of carbon nitride (C3N4) for producing clean hydrogen (H2). Herein, a kind of protonated C3N4 porous nanosheets with nitrogendefects of N1-vacancy and cyano group (named C3N4-ND) was simple synthesized. In the process, the strong oxidizing nitric acid was used skillfully to introduce N1-vacancy and -C---N group into C3N4 and achieves protonation. The nitrogen-defects engineering can shorten band gap, improve the separation of photogenerated carriers. And the defect site, can used as active center and effectively adsorb H+ for efficient photocatalytic hydrogen evolution performance. Simultaneously, the porous nanosheets greatly increase specific area enhanced contact with light and reaction fluids and more reactive sites than bulk C3N4 (BCN). Thus, the C3N4-ND can obtain brilliant photocatalytic hydrogen evolution performance. Typically, C3N4-ND1.7 exhibits excellent photocatalytic H2 evolution rate up to 1.12 mmol center dot g- 1 center dot h-1 for photocatalytic water splitting (PWS) and 39.18 mmol center dot g- 1 center dot h-1 for photocatalytic hydrogen evolution (PHE, 0.5 vol% TEOA as sacrificial agent) under visible light, which has 22.4 and 75.34 times increase over BCN, respectively. This work confirmed the positive effect of defect and morphology engineering on improving the photocatalytic hydrogen evolution performance of C3N4.