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One-step synthesis of S-doped g-C3N4 nanosheets for improved visible-light photocatalytic hydrogen evolution
Chemical Physics ( IF 2.0 ) Pub Date : 2020-02-10 , DOI: 10.1016/j.chemphys.2020.110714
Hui Guo , Zhu Shu , Donghang Chen , Yigen Tan , Jun Zhou , Fanyu Meng , Tiantian Li

A facile gas-templating method was developed to realize the synchronous nano-structuring and S-doping of g-C3N4 in one step. It uses the bottom-placed (NH4)2SO4 as a bi-functional gas template source and doping agent to transform the up-placed melamine into S-doped g-C3N4 nanosheets (SCN-20). SCN-20 is much superior to the counterpart synthesized from the mixed melamine and (NH4)2SO4, and shows a highly improved efficiency 8.4 times that of bulk g-C3N4 in visible-light photocatalytic H2 evolution. The improved performance mainly benefits from the enlarged specific surface area, enhanced light absorption and improved separation efficiency of photo-induced charge carriers. This work may inspire the facile synthesis of other nanostructured and doped g-C3N4.



中文翻译:

一步法合成S掺杂的gC 3 N 4纳米片以改善可见光光催化氢的释放

开发了一种简便的气体模板化方法,可实现一步实现gC 3 N 4的同步纳米结构和S掺杂。它使用底部放置的(NH 42 SO 4作为双功能气体模板源和掺杂剂,将上部放置的三聚氰胺转变为S掺杂的gC 3 N 4纳米片(SCN-20)。SCN-20优于由混合三聚氰胺和(NH 42 SO 4合成的对应物,并且在可见光光催化H 2中显示出高得多的效率,是块状gC 3 N 4的8.4倍。演化。改善的性能主要得益于扩大的比表面积,增强的光吸收和改善的光诱导电荷载流子的分离效率。这项工作可能会启发其他纳米结构和掺杂的gC 3 N 4的轻松合成。

更新日期:2020-02-10
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