A novel visible-light-induced double Z-scheme photocatalytic system: NH2-UiO-66/BiOBr/Bi2S3 for degradation of tetracycline hydrochloride and rhodamine B

被引：18

作者：

Zhang, Rui ^{[1
]}

Chen, Ziyin ^{[1
]}

Li, Yu ^{[1
]}

Zhao, Chen ^{[1
]}

Cai, Lu ^{[1
]}

Yu, Junrong ^{[1
]}

Yang, Ze ^{[1
]}

Jiang, Jiacheng ^{[1
]}

机构：

[1] Southwest Petr Univ, Coll Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2022年 / 649卷

关键词：

Photocatalysts; NH; 2-UiO-66; BiOBr; Bi; 2; S; 3; Heterojunction; Double Z -scheme; Dye pollutants; METAL-ORGANIC FRAMEWORKS; CO2; NANOCOMPOSITES; NH2-UIO-66(ZR); REDUCTION; EFFICIENT; EVOLUTION; MEMBRANE; EXCHANGE;

D O I：

10.1016/j.colsurfa.2022.129350

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 unique properties of MOFs make them the best candidates for catalytic and photocatalytic applications. In this research, the NH2-UiO-66 material was prepared by solvothermal method, and different content of NH2-UiO66 was added before the composite growth of Bi2S3 and BiOBr nanomaterials to obtain the NH2-UiO-66/BiOBr/ Bi2S3 ternary composite material. In order to investigate the relationship between the structure and properties of the catalyst, XRD, FT-IR, SEM, HRTEM, UV-vis DRS, XPS and other characterization technologies were used to analyze the structure, morphology, optical properties of the samples, showing that NH2-UiO-66/BiOBr/Bi2S3 have been successfully synthesized. Their photocatalytic performance was evaluated based on the photocatalytic degradation of tetracycline hydrochloride and rhodamine B under visible light. The results show that 2% NH2UiO-66/BiOBr/Bi2S3 has better photocatalytic activity than other materials. Moreover, NH2-UiO-66/BiOBr/Bi2S3 also demonstrated good photocatalytic reusability and stability. The formation of Bi2S3 and BiOBr heterojunctions and the introduction of NH2-UiO-66 with more active sites increase the carrier performance and separation efficiency. Then the valence band and conduction band values of the semiconductor material are calculated through the M-S curve, combined with the forbidden bandwidth deduced by UV-vis DRS and the experimental results of radical trapping, a double Z-type electron transfer mechanism suitable for this system is inferred. Finally, taking RhB as an example, the degradation path of dye pollutants was studied.

引用

页数：13

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