Construction of Large-Scale Ultrathin Graphitic Carbon Nitride Nanosheets by a Hydrogen-Bond-Assisted Strategy for Improved Photocatalytic Hydrogen Production and Ciprofloxacin Degradation Activity

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• 作者：Weinan Xing ; Prof. Gang Chen ; Chunmei Li ; Jingxue Sun ; Zhonghui Han ; Yansong Zhou ; Yidong Hu and Qingqiang Meng
• 刊名：ChemCatChem
• 出版年：2016
• 出版时间：September 7, 2016
• 年：2016
• 卷：8
• 期：17
• 页码：2838-2845
• 全文大小：2260K
• ISSN：1867-3899

文摘

Two-dimensional nanosheets have attracted attention because of their fascinating properties in areas such as photocatalysis, sensors, and energy storage. Herein, a facile hydrogen-bond-assisted approach was designed to prepare graphitic carbon nitride (g-C₃N₄) with large-scale ultrathin nanosheets. Compared with previous methods, this method is simple, economical, and eco-friendly. The as-prepared ultrathin g-C₃N₄ nanosheets have a few-layer thickness of 2–3 nm and exhibit a significantly enhanced photocatalytic activity in both H₂ production and ciprofloxacin degradation under visible light compared to pristine g-C₃N₄. The enhanced photocatalytic activity is attributed to the minimal sheet thickness, high surface area, increased band gap, outstanding electron transport ability, and long charge-carrier lifetime. In addition, the possible formation mechanism, transfer and separation behavior of the charge carriers, and the photocatalytic mechanism are discussed. This work presents a new hydrogen-bond-assisted self-assembly strategy for the preparation of ultrathin g-C₃N₄ nanosheets for application in photocatalysis.