文献类型： 外文期刊
第一作者： Zhong, Yuanyuan
作者： Zhong, Yuanyuan;Chen, Shengli;Xiao, Tian;Zhu, Xiaodong;Feng, Wei;Zhu, Xiaodong;Feng, Wei;Qi, Zhiyong
作者机构：
关键词： BiVO 4; AgI; Photocatalytic performance; Z -scheme heterojunction
期刊名称：JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS （ 影响因子：4.9； 五年影响因子：4.4 ）
ISSN： 0022-3697
年卷期： 2025 年 202 卷
页码：
收录情况： SCI
摘要： To resolve BiVO4's overly negative valence band potential inhibiting hydroxyl radical generation, AgI/BiVO4 photocatalyst composites were synthesized via a precipitation method. The photocatalytic performance and photogenerated charge transfer mechanism were studied. When the molar ratio of Ag to Bi was 0.5, the photocatalytic performance peaked, achieving an 83.0 % degradation degree of methylene blue solution after 60 min of light irradiation. The first-order reaction rate constant (k) was 0.0256 min-1, which was 15.0 times and 2.3 times higher than that of pure AgI and pure BiVO4, respectively. BiVO4 and AgI coupling formed a Z-scheme heterojunction, transferring photogenerated electrons from the conduction band of AgI to valence band of BiVO4 while retaining highly oxidative holes on AgI and highly reductive electrons on BiVO4, which is beneficial to the photocatalytic performance. Reactive species trapping experiments identified hydroxyl radicals as the dominant active species. This charge transfer mechanism facilitated charge separation, promoted the formation of hydroxyl radicals, and enhanced photocatalytic activity.
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