光催化
材料科学
石墨
罗丹明B
热液循环
比表面积
光降解
化学工程
多孔性
可见光谱
复合材料
纳米技术
催化作用
化学
石墨烯
有机化学
光电子学
工程类
作者
Xiangzhi Huang,Mingxuan Sun,Wangbing Sun,Ziyang Li,Haohao Chen,Junjie Zhao
标识
DOI:10.1016/j.ijhydene.2023.11.203
摘要
Herein, a series of porous N-graphyne decorated TiO2/Ti3C2 composites (NHGTTC-x) are constructed via hydrothermal treatment of N-graphyne and Ti3C2 in the presence of H2O2. The added H2O2 can serve as both pore-forming reagent of N-graphyne and oxidant of Ti3C2 in the synthesis process. As a result, numerous TiO2 nanoparticles in-situ generate on almost the entire surface of Ti3C2, and the porous wrinkled N-graphyne surrounds or attaches on the surface of TiO2/Ti3C2. The highest NH3 yield is found over the photocatalysis of NHGTTC-1% under UV–visible light for 4 h (0.306 mmol g−1), which is 3.86 times of that for pristine TiO2/Ti3C2 (0.079 mmol g−1). Moreover, the photodegradation efficiencies of tetracycline, rhodamine B, and levofloxacin by NHGTTC-1% are 2.40 folds, 2.58, and 7.90 times greater than that of pristine TiO2/Ti3C2 under visible light illumination. In addition, the primary active species is established to be superoxide radical (·O2−) in the photocatalytic decomposition process. Additionally, the enhanced mechanism of photocatalysis is methodically investigated by photocurrent, Tafel plots, electrochemical impedance, Mott-Schottky curves, etc. This study marks the first construction of porous N-graphyne/TiO2/Ti3C2 composites, which show superior photocatalytic activity for contaminants degradation and nitrogen fixation.
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