Ammonia synthesis by enhanced photocatalysis of N2 over oxygen-sulfur co-doped semi-crystalline g-C3N4
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Ammonia synthesis by enhanced photocatalysis of N2 over oxygen-sulfur co-doped semi-crystalline g-C3N4
- 发表刊物：
- Journal of Materials Science
- 摘要：
- Photocatalytic fixation of nitrogen is the most attractive method for the sustainable production of ammonia (NH3), which has attracted increasing attention, but the development of a highly active, stable and low-cost photocatalyst remains a great challenge. Herein, O, S co-doped carbon nitride (HGCNOS) based on carbon nitride (GCN) material was fabricated by a one-pot hydrothermal method at 180℃. Our results revealed that O, S atoms were successfully doped into GCN and HGCNOS showed better crystallinity and periodicity, shorter interlayer distances and great resistance to electron-hole recombination. The results of nitrogen fixation experiments showed that the ammonium ion yield of HGCNOS photocatalyst was as high as 0.23 mg/L/mg-cat after 2 hours. And the minuscule changes in photocatalytic performance after 3 consecutive cycles (4h for each cycle)，demonstrated excellent cycling stability. DFT calculations show that the introduction of O, S atoms promotes photo-excited charge separation, facilitates electrons’ leap and is more conducive to N2 adsorption, and consequently, an excellent photo-reactivity of HGCNOS. The results acquired may shed light on general doping strategies for designing potentially efficient photocatalysts.
- 合写作者：
- Dan Li, Jiahui Cheng, Zhao Jiang, Yang Guo*
- 是否译文：
- 否
- 发表时间：
- 2022-11-25