A dual defect co-modified S-scheme heterojunction for boosting photocatalytic CO2 reduction coupled with tetracycline oxidation

被引:68
作者
Jia, Xuemei [1 ,2 ]
Hu, Cheng [1 ,2 ]
Sun, Haoyu [1 ,2 ]
Cao, Jing [1 ,2 ]
Lin, Haili [1 ,2 ]
Li, Xinyue [1 ,2 ]
Chen, Shifu [1 ,2 ]
机构
[1] Huaibei Normal Univ, Coll Chem & Mat Sci, Huaibei 235000, Anhui, Peoples R China
[2] Huaibei Normal Univ, Minist Educ, Key Lab Green & Precise Synthet Chem & Applicat, Huaibei 235000, Anhui, Peoples R China
来源
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 324卷
基金
中国国家自然科学基金;
关键词
Dual-defect; S-scheme; I doped BiOBr; Photocatalytic; Dual-purpose reaction system; GENERALIZED GRADIENT APPROXIMATION; SOLID-SOLUTIONS; BAND-STRUCTURE; LIGHT; BIOBR; WATER; DEGRADATION; COMPOSITES; G-C3N4;
D O I
10.1016/j.apcatb.2022.122232
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
To synchronously relieve energy shortage and wastewater remediation, herein, a dual-defect S-scheme hetero-junction of I doped BiOBr modified N vacancy g-C3N4 (labeled as IB/CNx) was designed for simultaneously photocatalytic CO2 reduction coupled with tetracycline oxidation. The 70IB/CNx presented higher photo -catalytic property for CO2 reduction coupled with TC removal than those of IB/CN, BiOBr/CNx, and BiOBr/CN. The improved photocatalytic activity was mainly attributed to the synergistic effect of doped I ions and N defects. Besides, such designed coupled reaction system presented much superior catalytic performance than those of two half-reactions, which achieved the full utilization of carriers. All in all, a dual-defect heterojunction enhanced a dual-function reaction system, in which the dual-defect active spots accelerated the transfer and separation of carriers, meanwhile, the dual-function reaction system realized the full utilization of the charges. This work highlighted the pivotal role of defect engineering to design efficient photocatalysts for environment and energy applications.
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页数:15
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