期刊
OPTICAL MATERIALS
卷 99, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.optmat.2019.109594
关键词
K doped g-C3N4 nanosheets; Bridging doping; Thermal exfoliation; DFT; Photocatalysis
资金
- key research and development project of Sichuan Province [2018GZ0455]
- key research and development project of Chengdu City [2019-YFO5-00192-SN]
- High Performance Computing Center of Sichuan Normal University, China
In this study, a type of novel K doped g-C3N4 nanosheets (KCNN) was synthesized by combining K atom bridging doping and thermal exfoliation for the first time. The as-synthesized KCNN had a very efficient ability of photocatalytic degradation of RhB by visible light, and its catalytic rate constant was 8.3 times higher than that of pure g-C3N4. This excellent photocatalytic performance came from the bridging doping of K atom and the morphology of the KCNN nanosheets. The KCNN nanosheets not only had the advantage of the large specific surface area, but also enhanced the electron-hole separation by shortened charge-to-surface migration length. In addition, the bridging doping of K atom increased the absorption of visible light, and promoted the separation of electron-hole due to electrostatic and bridging effects. Our work not only provided a promising material for effective removal of dye contaminants from wastewater but also opened a new window for the mechanism of electron and hole (e(-) and h(+)) separation in doped modified and dimensionality tuning materials.
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