Abstract

Bi/Bi₂O₂SiO₃/Bi₂WO₆ composite photocatalysts were synthesized via a simple reduction method with using ethylene glycol (EG) as reducing agent. Compared to the pure semiconductor, Bi/Bi₂O₂SiO₃/Bi₂WO₆ showed the highest photoactivity in degradation of rhodamine B (RhB) and ciprofloxacin (CIP) under visible light. The enhanced phtocatalytic performance can be primarily attributed to the improved visible light absorption and the effective separation of the charge carries by introducing Bi₂O₂SiO₃ and Bi produced surface plasmon resonance (SPR) effect, which is confirmed by UV–Vis diffuse refectance spectroscopy (DRS) and the photoelectrochemical measurements. In addition, cycle experiments explored the reliable stability and reusability for catalyst. Moreover, radical species trapping experiments demonstrated that holes (h⁺) played crucial role in photodegradation process. This study may help promote the development of eliminate organic pollutants and environmental protection.

中文翻译：

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可见光活性增强的Bi / Bi 2 O 2 SiO 3 / Bi 2 WO 6复合材料在光催化降解有机化合物中的合成

摘要

以乙二醇（EG）为还原剂，通过简单的还原方法合成了Bi / Bi ₂ O ₂ SiO ₃ / Bi ₂ WO ₆复合光催化剂。与纯半导体相比，Bi / Bi ₂ O ₂ SiO ₃ / Bi ₂ WO ₆在可见光下对若丹明B（RhB）和环丙沙星（CIP）的降解表现出最高的光活性。增强的光催化性能主要归因于通过引入Bi ₂ O ₂ SiO ₃改善了可见光吸收和有效地分离了电荷Bi产生了表面等离振子共振（SPR）效应，这通过UV-Vis扩散反射光谱（DRS）和光电化学测量得到了证实。另外，循环实验探索了催化剂的可靠稳定性和可重复使用性。此外，自由基物种捕获实验表明，空穴（h ⁺）在光降解过程中起着至关重要的作用。这项研究可能有助于促进消除有机污染物和环境保护的发展。