Na-mediated carbon nitride realizing CO 2 photoreduction with selectivity modulation

被引：3

作者：

Han, Yi ^{[1
]}

Li, Wen ^{[1
]}

Bi, Chuanzhou ^{[1
]}

Liu, Jinyuan ^{[2
,3
]}

Xu, Hangmin ^{[1
]}

Song, Hao ^{[1
]}

Zhong, Kang ^{[4
]}

Yang, Jinman ^{[4
]}

Jiang, Weiyi ^{[1
]}

Yi, Jianjian ^{[1
]}

Wang, Bin ^{[2
,3
]}

Chu, Paul K. ^{[2
,3
]}

Ding, Penghui ^{[5
]}

Xu, Hui ^{[4
]}

Zhu, Xingwang ^{[1
]}

机构：

[1] Yangzhou Univ, Inst Technol Carbon Neutralizat, Coll Environm Sci & Engn, Yangzhou 225009, Peoples R China

[2] City Univ Hong Kong, Dept Mat Sci & Engn, Dept Phys, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China

[3] City Univ Hong Kong, Dept Biomed Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China

[4] Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Peoples R China

[5] Linkoping Univ, Dept Sci & Technol, Lab Organ Elect, SE-60174 Norrkoping, Sweden

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2024年 / 670卷

基金：

中国国家自然科学基金;

关键词：

Photocatalysts; CO; 2; reduction; Ion intercalation; Carrier separation; ENERGY-LOSS SPECTRA; CHARGE-TRANSFER; H-2; EVOLUTION; G-C3N4; NITROGEN; HETEROJUNCTION; POLYMERIZATION; PHOTOCATALYST; NANOSHEETS; VACANCY;

D O I：

10.1016/j.jcis.2024.05.003

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：

The depressed directional separation of photogenerated carriers and weak CO2 adsorption/activation activity are the main factors hampering the development of artificial photosynthesis. Herein, Na ions are embedded in graphitic carbon nitride (g-C3N4) to achieve directional migration of the photogenerated electrons to Na sites, while the electron-rich Na sites enhance CO2 adsorption and activation. Na/g-C3N4 (NaCN) shows improved photocatalytic reduction activity of CO2 to CO and CH4, and under simulated sunlight irradiation, the CO yield of NaCN synthesized by embedding Na at 550 degrees C (NaCN-550) is 371.2 mu mol g-1 h-1, which is 58.9 times more than that of the monomer g-C3N4. By means of theoretical calculations and experiments including in situ fourier transform infrared spectroscopy, the mechanism is investigated. This strategy which improves carrier separation and reduces the energy barrier at the same time is important to the development of artificial photosynthesis.

引用

页码：348 / 356

页数：9

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