CdS 量子点被包裹在 MCM-41 的介孔和蒙脱石的层间作为光催化剂，用于水溶液中罗丹明 B 的降解。
CdS quantum dots encapsulated within the mesopores of MCM-41 and interlayers of montmorillonite as photocatalysts for rhodamine-B degradation in aqueous solution.
机构信息
Faculty of Chemistry, Kharazmi University, Tehran, Islamic Republic of Iran.
Research Institute of Green Chemistry, Kharazmi University, Tehran, Islamic Republic of Iran.
出版信息
Environ Sci Pollut Res Int. 2021 Jan;28(4):4615-4622. doi: 10.1007/s11356-020-10810-3. Epub 2020 Sep 18.
Capping agent-free CdS quantum dots (CdS-QDs) were synthesized within the mesopores of MCM-41 and interlayers of montmorillonite (MMT), using a safe manner by a facile ion exchange-precipitation protocol. The mesopores of MCM-41 and interlayers of MMT controlled the growth of CdS-QDs. The obtained CdS-QDs@MCM-41 and CdS-QDs/MMT were characterized by X-ray diffraction (XRD) analysis, energy-dispersive X-ray (EDX), diffuse reflectance UV-Vis, and photoluminescence spectroscopies. Photodegradation of rhodamine-B (RhB) over these embedded CdS-QDs was investigated under UV-Vis light irradiation. The influences of some parameters on the photodegradation of RhB such as pH, temperature, and UV-Vis irradiation time were investigated. The results showed that the CdS-QDs/MMT and CdS-QDs@MCM-41 have high efficiencies for RhB photodegradation under UV-Vis illumination.
无包覆剂 CdS 量子点 (CdS-QDs) 通过简便的离子交换-沉淀法在 MCM-41 的介孔中和蒙脱土 (MMT) 的层间中被合成，这是一种安全的方法。MCM-41 的介孔和 MMT 的层间控制了 CdS-QDs 的生长。通过 X 射线衍射 (XRD) 分析、能谱 (EDX)、漫反射紫外可见分光光度计和光致发光光谱对获得的 CdS-QDs@MCM-41 和 CdS-QDs/MMT 进行了表征。在 UV-Vis 光照射下，研究了这些嵌入式 CdS-QDs 对罗丹明 B (RhB) 的光降解作用。考察了一些参数对 RhB 光降解的影响，如 pH 值、温度和 UV-Vis 照射时间。结果表明，CdS-QDs/MMT 和 CdS-QDs@MCM-41 在 UV-Vis 光照下对 RhB 具有高效的光降解性能。
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