Co-ZIF-derived dual Co and Co 3 S 4 nanoparticles encapsulated in N-doped carbon matrix for efficient photocatalytic CO 2 reduction

被引:2
作者
Huang, Lili [1 ]
Mo, Shengpeng [1 ]
Zhao, Xin [1 ]
Zhou, Jiangjing [1 ]
Zhang, Yanan [1 ]
Zhou, Xiaobin [1 ]
Fan, Yinming [1 ]
Xie, Qinglin [1 ]
Ye, Daiqi [2 ]
机构
[1] Guilin Univ Technol, Coll Environm Sci & Engn, Guilin 541004, Peoples R China
[2] South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Peoples R China
来源
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 03期
基金
中国国家自然科学基金;
关键词
Co-ZIF; Dual nanoparticles; N-doped carbon; CO2; photoreduction; CATALYST; GRAPHENE;
D O I
10.1016/j.jece.2024.112566
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, a novel N -doped carbon -coated dual Co and Co 3 S 4 nanoparticles composite (Co-Co 3 S 4 @NC) has been developed by pyrolysis of an ideal flower-like Co-ZIF precursor followed via subsequent hydrothermal sulfidation. Under visible -light irradiation, the Co-Co 3 S 4 @NC exhibits outstanding performances for CO 2 reduction with H 2 O vapor into CO (23.14 mu mol g - 1 h -1 ) and CH 4 (0.62 mu mol g - 1 h -1 ) in a continuous flow system, significantly outperforming the single Co@NC photocatalyst. The experimental results demonstrate that the energy band structure in Co-Co 3 S 4 @NC can provide a more favorable reduction potential for the effective reduction of CO 2 . Moreover, the presence of Co 3 S 4 is beneficial for the rapid separation and transfer of charges, thereby enhancing the utilization of photogenerated charge carriers. Thanks to its unique composition, CoCo 3 S 4 @NC possesses abundant active sites for chemisorption and activation of CO 2 , which facilitates CO 2 photoreduction. The reaction mechanism is revealed in detail by analyzing the key intermediate species obtained through in situ DRIFTS. The current work offers a facile route for the construction of MOF-derived composites for promising photocatalytic reactions.
引用
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页数:9
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