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Electron-hole trap regulation in porous ultrathin g-C3N4 nanosheet for enhanced photocatalytic H2 evolution and CO2 reduction
发布时间：2026-09-18
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- 发布时间：
- 2026-09-18
- 论文名称：
- Electron-hole trap regulation in porous ultrathin g-C3N4 nanosheet for enhanced photocatalytic H2 evolution and CO2 reduction
- 发表刊物：
- EcoEnergy
- 摘要：
- Graphitic carbon nitride (g-C3N4) is a promising photocatalyst for solar energy conversion, but the rapid charge recombination of pristine g-C3N4 (CN) severely limits the photocatalytic activity. Herein, S/N co-doped porous ultrathin g-C3N4 nanosheet (MCN-NS) is synthesized to improve the charge carriers transport from bulk to surface and regulate electron-hole trapping sites. S and N dopants act as electron and hole trapping sites, respectively, creating an intrinsic donor-acceptor configuration that reduces charge recombination rate. Consequently, MCN-NS demonstrates an enhanced photocatalytic H2 evolution rate of 8228 μmol h-1 g-1, which is 32.3 times higher than that of CN, with an apparent quantum yield (AQY) of 15.2% at 400 nm. Additionally, MCN-NS shows efficient CO2 to CO and CH4 conversion rates of 89.5 and 18.6 μmol h-1 g-1 , respectively, in pure water without sacrificial agents or co-catalysts. This work presents a facile and scalable approach to regulate the charge dynamics in g-C3N4 for efficient solar-to-chemical conversion.
- 通讯作者：
- Samuel Guemou, Cheng Cheng,* Botong Zheng, Wenze Luo, Zening Cheng,* Chongze Cai, Yanping Du, Jinwen Shi*
- 是否译文：
- 否
