Construction and photocatalytic performance of dual Z-scheme BiVO4/AgBr/Ag2MoO4 heterojunction for enhanced photocatalytic degradation of rhodamine B

IF 2.8 3区化学 Q4 CHEMISTRY, PHYSICAL

Chemical Physics Pub Date : 2026-06-01 Epub Date: 2026-02-05 DOI:10.1016/j.chemphys.2026.113112

Xiaohua Zheng , Huilin Han , Ruomeng Zhang , Jingting Yang

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Abstract

Photocatalysis is a green and efficient technology for degrading organic pollutants. However, its development is restricted by the high recombination rate of photogenerated electron-hole pairs. In this study, double-Z-type BiVO₄/AgBr/Ag₂MoO₄ ternary photocatalysts were successfully synthesized by a one-step precipitation method at room temperature, and their photocatalytic performance for degrading rhodamine B (RhB) was investigated. The composition and microstructure of the photocatalysts were characterized by X-ray diffraction (XRD), cold field scanning electron microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS), specific surface area testing, and X-ray photoelectron spectroscopy (XPS). The results of ultraviolet-visible diffuse reflectance spectroscopy (UV–Vis DRS), photoluminescence (PL), and electrochemical impedance spectroscopy (EIS) indicate that the optical properties of the photocatalysts are good. Under visible light irradiation, the BiVO₄/AgBr/Ag₂MoO₄ photocatalyst with Ag₂MoO₄ mass fraction of 12% achieved a degradation rate > 99% within 12 min, with degradation rates 260.5, 6.1, and 161.7 times that of pure BiVO₄, AgBr, and Ag₂MoO₄, respectively. In addition, holes (h⁺) and superoxide radicals (·O²⁻) are the main active species, and hydroxyl radicals (·OH) also have a certain influence during the photocatalysis process, according to the active species capture experiments. This study demonstrates that the ternary photocatalyst has the potential to efficiently degrade organic pollutants under sunlight.

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双Z-scheme BiVO4/AgBr/Ag2MoO4异质结的构建及其光催化性能对罗丹明B的光催化降解

光催化是一种绿色高效的有机污染物降解技术。然而，它的发展受到光生电子-空穴对复合率高的限制。本研究采用一步沉淀法在室温下成功合成了双z型BiVO4/AgBr/Ag2MoO4三元光催化剂，并对其光催化降解罗丹明B （rhodamine B, RhB）的性能进行了研究。采用x射线衍射（XRD）、冷场扫描电镜（FE-SEM）、x射线能谱（EDS）、比表面积测试和x射线光电子能谱（XPS）表征了光催化剂的组成和微观结构。紫外-可见漫反射光谱（UV-Vis DRS）、光致发光（PL）和电化学阻抗谱（EIS）测试结果表明，所制备的光催化剂具有良好的光学性能。在可见光照射下，Ag2MoO4质量分数为12%的BiVO4/AgBr/Ag2MoO4光催化剂在12 min内降解率达到99%，降解率分别是纯BiVO4、AgBr和Ag2MoO4的260.5倍、6.1倍和161.7倍。此外，根据活性物质捕获实验，空穴（h+）和超氧自由基（·O2−）是主要的活性物质，羟基自由基（·OH）在光催化过程中也有一定的影响。该研究表明，三元光催化剂具有在阳光下有效降解有机污染物的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

4.30%

发文量

278

审稿时长

39 days

期刊介绍： Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.