硫掺杂g-C_(3)N_(4)制备及其光催化产氢性能研究  

Preparation of Sulfur-Doped g-C_(3)N_(4)and Its Photocatalytic Performance for Hydrogen Evolution

作　　者：李星杰 孙玮 明邱焱 刘耀程 廖国东 王海涛 江吉周[1] LI Xingjie;SUN Wei;MING Qiuyan;LIU Yaocheng;LIAO Guodong;WANG Haitao;JIANG Jizhou(Novel Catalytic Materials of Hubei Engineering Research Center,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学新型催化材料湖北省工程研究中心,湖北武汉430205

出　　处：《聊城大学学报（自然科学版）》2024年第1期70-75,共6页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(62004143);湖北省重点研发计划项目(2022BAA084);湖北省自然科学基金项目(2021CFB133)资助。

摘　　要：在“双碳”国家战略背景下,氢能的开发备受关注。石墨相氮化碳(g-C_(3)N_(4))因具有制备简便、带隙合适、稳定性高等优势,被认为是一种极具应用前景的产氢光催化剂。然而,在光催化体系中,纯g-C_(3)N_(4)的光生载流子转移速率较慢且易于复合,故其产氢性能通常不佳。本研究创造性地利用硫粉与尿素水溶液间的高温热聚反应,开发出一种简便且高效的硫掺杂g-C_(3)N_(4)合成策略,原位合成了二维硫掺杂g-C_(3)N_(4)纳米片(S-g-C_(3)N_(4)),系统研究了硫掺杂对g-C_(3)N_(4)光电化学性质和光催化产氢性能的影响。结果表明,硫掺杂不仅可有效增强g-C_(3)N_(4)的可见光吸收能力,而且还显著提高g-C_(3)N_(4)的光生载流子分离和转移效率。因此,S-g-C_(3)N_(4)的光催化产氢速率比纯g-C_(3)N_(4)高近10倍。Developing hydrogen energy has attracted wide attention under the background of‘dual carbon’national strategy.g-C_(3)N_(4)is considered to be a promising hydrogen evolution photocatalyst because of its advantages of simple preparation,suitable band gap and high stability.However,slow charge transfer and fast carrier recombination rate lead to poor hydrogen evolution performance of pure g-C_(3)N_(4).In this study,a simple and efficient sulfur-doped g-C_(3)N_(4)synthesis strategy is developed by creatively using the high-temperature thermal polymerization between sulfur powder and urea solution.As a result,two-dimensional sulfur-doped g-C_(3)N_(4)nanosheet(S-g-C_(3)N_(4))is synthesized.Subsequently,the effects of sulfur doping on the photoelectrochemical properties and photocatalytic hydrogen evolution performance of g-C_(3)N_(4)are systematically studied.The results show that sulfur doping can not only effectively enhance the visible light absorption capacity,but also significantly improve the photogenerated carrier separation and transfer efficiency of g-C_(3)N_(4).Therefore,the photocatalytic hydrogen production rate of S-g-C_(3)N_(4)is nearly 10 times higher than that of pure g-C_(3)N_(4).

关 键 词：g-C_(3)N_(4) 硫粉 硫掺杂 光催化产氢 

分 类 号：O6-339[理学—化学] G642.423[文化科学—高等教育学]