Facile Fabrication of Large-Aspect-Ratio g-C3N4 Nanosheets for Enhanced Photocatalytic Hydrogen Evolution
Facile Fabrication of Large-Aspect-Ratio g-C3N4 Nanosheets for Enhanced Photocatalytic Hydrogen Evolution
复制标题
轻松制备大纵横比 g-C3N4 纳米片以增强光催化析氢
DOI：
10.1021/acssuschemeng.6b02721
复制
发表时间：
2017-03-01
影响因子：
8.4
通讯作者：
Yang, Hua Gui
中科院分区：
文献类型：
--
作者：
Fang, Li Jun;Li, Yu Hang;Yang, Hua Gui
将块状石墨氮化碳（BCN）剥离成二维（2D）纳米片是提高其光催化性能的有效策略之一。与BCN相比，2D g-C3N4纳米片（CNNS）具有更大的比表面积和更多的反应位点。在无水乙二胺的蚀刻辅助下，BCN可以成功剥离成横向尺寸超过15μm的2D CNNS，这比其他作品大得多。经过无水乙二胺的适当刻蚀后，g-C3N4的比表面积从4.7扩大到31.1 m2 g–1，光催化析氢速率增加7.4倍，从4.8增加到35.3 μmol h–1。与其他报道的方法相比，本工作中制造 2D CNNS 的策略很方便，并且是首次报道在碱性试剂的帮助下制造 2D CNNS。
Exfoliation of bulk graphitic carbon nitride (BCN) into two-dimensional (2D) nanosheets is one of the effective strategies to improve its photocatalytic performance. Compared with BCN, the 2D g-C3N4 nanosheets (CNNS) have larger specific surface areas and more reaction sites. With the etching assistance of anhydrous ethylenediamine, BCN can be successfully peeled off into 2D CNNS with a large lateral size of more than 15 μm which is much larger than that of other works. After appropriate etch by anhydrous ethylenediamine, the specific surface area of g-C3N4 expands from 4.7 to 31.1 m2 g–1 and the photocatalytic hydrogen evolution rate increases 7.4 times, from 4.8 to 35.3 μmol h–1. In contrast to other reported methods, the strategy to fabricate 2D CNNS in this work is convenient and it is the first time to report the fabrication of 2D CNNS with the assistance of alkaline reagent.