S/P co-doped g-C3N4 with secondary calcination for excellent photocatalytic performance
S/P co-doped g-C3N4 with secondary calcination for excellent photocatalytic performance
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DOI：
10.1016/j.ijhydene.2023.09.083
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发表时间：
2023-09
影响因子：
7.2
通讯作者：
Yuhao Yang;Jiahao Yan;Yixia Zhang;Shushu Xing;J. Ran;Yong-huan Ma;Xiaolong Li
中科院分区：
文献类型：
--
作者：
Yuhao Yang;Jiahao Yan;Yixia Zhang;Shushu Xing;J. Ran;Yong-huan Ma;Xiaolong Li
无金属、低成本的g-C3 N4作为解决环境和能源问题的光催化剂受到了研究人员的广泛关注。然而，体相g-C3 N4光吸收有限，反应活性中心少，光生电子和空穴容易复合，导致光催化性能不理想。本研究采用S/P共掺杂和二次煅烧改性相结合的方法成功制备了具有优良光降解性能的g-C3 N4纳米片。由于双元素掺杂和二次焙烧的协同作用，改性g-C3 N4在4 min内对罗丹明B（30 mg L−1）的降解率达到99.4%，是纯g-C3 N4的15倍。此外，利用光催化分解水制氢的实验结果与光催化分解水制氢的实验结果不同，表明其关键因素与光降解反应不同，为g-C3 N4的改性提供了一种有效可行的新思路。
The metal-free and low-cost g-C3N4has received a lot of attention from researchers as a photocatalyst to solve environmental and energy problems. However, bulk g-C3N4suffers from limited light absorption, few reactive sites and easy recombination of photogenerated electrons and holes, resulting in unsatisfactory photocatalytic performance. In this study, g-C3N4nanosheets with excellent photodegradation performance were successfully fabricated by a combination of S/P co-doping and secondary calcination modifications. The modified g-C3N4could degrade 99.4% rhodamine B (30 mg L−1) in only 4 min, which was 15 times higher than that of pure g-C3N4due to the synergistic effect of bi-element doping and secondary calcination. Furthermore, experiments using photocatalytic water splitting for hydrogen production have shown different results, demonstrating that the critical factor is different from the photodegradation reaction.This paper provides an effective and feasible novel idea for the modification of g-C3N4.