Potassium doped and nitrogen defect modified graphitic carbon nitride for boosted photocatalytic hydrogen production

被引:47
作者
Chen, Lu [1 ,2 ]
Ning, Shangbo [4 ]
Liang, Ruowen [1 ,2 ]
Xia, Yuzhou [1 ]
Huang, Renkun [1 ,2 ]
Yan, Guiyang [1 ,2 ]
Wang, Xuxu [3 ]
机构
[1] Ningde Normal Univ, Fujian Prov Univ Key Lab Green Energy & Environm, Dept Chem, Ningde 352100, Peoples R China
[2] Ningde Normal Univ, Fujian Prov Key Lab Featured Mat Biochem Ind, Ningde 352100, Peoples R China
[3] Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China
[4] Tianjin Univ, Sch Mat Sci & Engn, TJU NIMS Int Collaborat Lab, Tianjin 300072, Peoples R China
关键词
Potassium doping; Nitrogen defect; Graphitic carbon nitride; Hydrogen evolution; G-C3N4; EVOLUTION; NANOPARTICLES; NANOSHEETS; NI2P; SIZE;
D O I
10.1016/j.ijhydene.2022.02.147
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Controlling the structure of semiconductors to tailor are physicochemical and photoelectronic structure features. Graphitic carbon nitride has triggered a new impetus in the field of photocatalysis. However, the rapid recombination of charge carriers limited its photocatalytic activity. Herein, we demonstrate that potassium doped and nitrogen defects into graphitic carbon nitride (KCNx) framework are favorable for visible light harvesting, charge separation and have highly efficient photocatalytic behavior for water splitting. It exhibits a high hydrogen evolution activity of 59.9 mmol center dot & nbsp;g(-1)center dot & nbsp;h(-1) (66.6 times much higher than that of pristine g-C3N4), and remarkable apparent quantum efficiency of 57.17% at 420 nm. The superior photocatalytic performance of the KCNx sample was attributed to the less recombination rate of photogenerated electron and hole, and enhanced conductivity,
引用
收藏
页码:14044 / 14052
页数:9
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