光催化
材料科学
石墨氮化碳
碳纳米管
化学工程
多孔性
纳米技术
带隙
兴奋剂
氢
纳米管
制氢
辐照
分解水
催化作用
化学
有机化学
复合材料
光电子学
工程类
物理
核物理学
作者
S.F. Zhang,Changsheng An,Rongchao Zhang,Dezhi Kong,Dongdong Xu,Shiying Zhang
出处
期刊:Langmuir
[American Chemical Society]
日期:2024-03-11
标识
DOI:10.1021/acs.langmuir.3c04029
摘要
The photocatalytic activity of g-C3N4 can be enhanced by improving photoinduced carrier separation and exposing sufficient reactive sites. In this study, we synthesized B-doped porous tubular g-C3N4 (BCNT) using a H3BO3-assisted supramolecular self-template method, wherein H3BO3 helped in B-doping, building a porous structure, and maintaining one-dimensional nanotubes. The tubular structure had an ultrathin tube wall and large aspect ratio, which are conducive to the directional transmission and separation of photogenerated carriers; moreover, the abundant pore structure of the tube wall could fully expose the reactive sites. The introduction of B and the cyano group modulated the bandgap of g-C3N4 and elevated the position of the conduction band, thus enhancing the photoreduction ability and effectively improving the hydrogen evolution performance. Consequently, the hydrogen evolution of BCNT-2 (220.8, 53.2 μmol·h–1) was 1.82 and 1.54 times that of ultrathin g-C3N4 nanosheets (CNN, 121.3, 34.6 μmol·h–1) under simulated sunlight and LED lamp irradiation, respectively. Thus, this work provides in-depth insights into the rational design of one-dimensional g-C3N4 nanotubes with high hydrogen evolution activity under visible irradiation.
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