数字农科院2.0

Visible-light photocatalytic oxygen activation by oxygen vacancies-rich BiOI for enhanced removal of bisphenol A in water

文献类型： 外文期刊

作者： Hailong Tong;Jinna Zhang;Baiming Sun;Han Shi;Nanqi Ren;Shijie You;Guangshan Zhang

作者机构：

关键词： BiOI;Bisphenol A;Defect engineering;Oxygen activation;Oxygen vacancies

期刊名称： Environmental Research

ISSN： 0013-9351

年卷期： 2025 年 275 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Bisphenol A (BPA) is a persistent endocrine disruptor that poses high ecological and healthy risks. Photocatalytic oxygen (O2) activation has emerged as a promising technology for water decontamination, but its efficiency is often hindered by sluggish interfacial electron transfer between photocatalysts and O2 molecules. In this study, a Zn/S co-doping defect engineering strategy was developed to introduce oxygen vacancies (OVs) into BiOI for enhancing visible-light photocatalytic O2 activation and BPA removal. The OVs-rich BiOI with sub-band near the conduction band provided electron and reactant trapping sites that facilitated spatial separation of photogenerated electrons (e−) and holes (h+). The localized electrons at OVs reduced O2 via single-electron transfer to generate superoxide radicals (•O2−), which were further oxidized to singlet oxygen (1O2) by h+. Synergistic oxidation of 1O2 and h+ significantly enhanced BPA degradation, achieving approximately 90 % removal within 120 min. The reaction rate constant (0.01829 min−1) was nearly double that of pure BiOI (0.00948 min−1). Furthermore, the OVs-rich BiOI catalyst demonstrated excellent stability and reusability, maintaining >90 % BPA removal efficiency after five cycles of test. This study offers a new strategy for developing visible-light photocatalyst to remove recalcitrant emerging organic contaminants in water.

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