Dynamic properties of photogenerated charge in BiOBr/Bi2WO6/GO ternary composites and its application for organic pollutants degradation

被引：6

作者：

Lang, Tian ^{[1
,2
]}

Yang, Jiayan ^{[1
,2
]}

Liu, Yuanyuan ^{[1
]}

Jiang, Awen ^{[1
,2
]}

Wu, Jing ^{[1
,2
]}

Chen, Jie ^{[1
]}

Xie, Tengfeng ^{[3
]}

Qiu, Qingqing ^{[1
]}

Liang, Tongxiang ^{[1
]}

机构：

[1] Jiangxi Univ Sci & Technol, Coll Rare Earths, Engn Res Ctr Hydrogen Energy Mat & Devices, 86 Hong Qi Rd, Ganzhou 341000, Peoples R China

[2] Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, 86 Hong Qi Rd, Ganzhou 341000, Peoples R China

[3] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China

来源：

JOURNAL OF CHEMICAL PHYSICS | 2023年 / 159卷 / 16期

基金：

中国国家自然科学基金;

关键词：

ENHANCED PHOTOCATALYTIC DEGRADATION; SURFACTANT-ASSISTED SYNTHESIS; HIGHLY EFFICIENT; METHYLENE-BLUE; GRAPHENE OXIDE; NANOPARTICLES; MECHANISM; HETEROJUNCTION; NANOCOMPOSITE; MICROSPHERES;

D O I：

10.1063/5.0167021

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：

Carbon-based Materials have been extensively researched for their prospect in the fields of environment and energy, especially for graphene oxide (GO). In this work, a novel sodium dodecyl sulfate (SDS)-assisted synthesis of BiOBr/Bi2WO6/GO ternary composite has been synthesized successfully by a handy hydrothermal method. Photoluminescence, Photocurrent, Electrochemical Impedance Spectroscopy, surface photovoltage and transient photovoltage measurements illustrate that construction of p-n BiOBr/Bi2WO6 heterojunction leads to the obviously enhancement of charge separation efficiency, and the photogenerated electrons trapped by GO can effectively inhibit the recombination process of photogenerated charge, resulting in the improvement of charge separation efficiency and the longer lifetime of photogenerated carriers for BiOBr/Bi2WO6/GO. The characterization of structure and morphology indicate that role of GO can also improve the visible light absorption range, and the SDS-assisted synthesis can reduce the size of particle in the composite and enhances the specific surface area of the composite by regulating the particle size and agglomeration. Under optimal conditions, BiOBr/Bi2WO6/GO (SDS) has the outstanding photocatalytic degradation performance and the degradation rate constants for oxytetracycline, tetracycline hydrochloride, methylene blue and rhodamine are 0.056, 0.057, 0.103 and 0.414 min(-1), respectively. Notably, the degradation rate constants obtained by BiOBr/Bi2WO6/GO (SDS) are more ten times higher than that of pure BiOBr and Bi2WO6. The possible mechanism of photocatalytic degradation was suggested for BiOBr/Bi2WO6/GO based on the dynamic properties of photogenerated charge and reactive oxidation species results. Surprisingly, the recyclability of the BiOBr/Bi2WO6/GO (SDS) composite obtained from the cyclic experiments has laid a foundation for the study of efficient and stable photocatalysts.

引用

页数：14

共 68 条

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