石墨氮化碳
材料科学
光催化
光降解
双功能
电催化剂
化学工程
催化作用
可见光谱
剥脱关节
兴奋剂
纳米片
析氧
聚合
纳米材料
纳米技术
石墨烯
电化学
有机化学
聚合物
化学
复合材料
电极
物理化学
工程类
光电子学
作者
Qian Yan,Gui‐Fang Huang,Dongfeng Li,Ming Zhang,Anlian Pan,Wei‐Qing Huang
标识
DOI:10.1016/j.jmst.2017.06.018
摘要
As a low-cost visible-light-driven metal-free catalyst, graphitic carbon nitride (g-C3N4) has attracted increasing attention due to its wide applications for solar energy conversion, environmental purification, and organic photosynthesis. In particular, the catalytic performance of g-C3N4 can be easily modulated by modifying morphology, doping, and copolymerization. Simultaneous optimization, however, has little been achieved. Herein, a facile one-pot strategy is developed to synthesize porous B-doped g-C3N4 nanosheets by using H3BO3 and urea as the precursor during thermal polymerization. The resultant B-doped g-C3N4 nanosheets retain the original framework of bulk g-C3N4, while induce prominently enhanced visible light harvesting and narrowing band gap by 0.32 eV compared to pure g-C3N4. Moreover, the adsorption capacity and photodegradation kinetics of methylene blue (MB) under visible light irradiation over B-doped g-C3N4 nanosheets can be improved by 20.5 and 17 times, respectively. The synthesized porous B-doped g-C3N4 nanosheets also exhibit higher activities than pure g-C3N4 as bifunctional electrocatalyst for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The enhanced catalyst performance of porous B-doped g-C3N4 nanosheets stems from the strong synergistic effect originating from the larger exposed active sites generated by the exfoliation of g-C3N4 into nanosheets and the porous structure, as well as the better conductivity owing to B-doping. This work provides a simple, effective, and robust method for the synthesis of g-C3N4-based nanomaterial with superior properties to meet the needs of various applications.
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