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

第一作者： Tong, Hailong

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

作者机构：

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

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：7.7； 五年影响因子：7.7 ）

ISSN： 0013-9351

年卷期： 2025 年 275 卷

页码：

收录情况： SCI

摘要： Bisphenol A (BPA) is a persistent endocrine disruptor that poses high ecological and healthy risks. Photocatalytic oxygen (O-2) activation has emerged as a promising technology for water decontamination, but its efficiency is often hindered by sluggish interfacial electron transfer between photocatalysts and O-2 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 O-2 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 O-2 via single-electron transfer to generate superoxide radicals (center dot O-2(-)), which were further oxidized to singlet oxygen (O-1(2)) by h(+). Synergistic oxidation of O-1(2) 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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