MCNOs/CdS双效光催化剂的制备及其性能研究

摘要/Abstract

摘要： 水热合成法制备了不同磁性纳米洋葱碳(MCNOs)负载量(0%、1%、3%、5%)的MCNOs/CdS光催化剂。并通过X射线衍射分析(XRD)、扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)、X射线光电子能谱(XPS)、紫外可见光光谱(UV-Vis)、磁滞回线测定仪(VSM)对其进行表征,探究了MCNOs负载比例对催化剂在可见光下降解RhB性能及机理的影响。结果表明,MCNOs能有效提高CdS的光催化效果,复合3%MCNOs后降解率为96%,与纯CdS相比降解率提高了30%,磁性分析表明,其具有良好的顺磁性并能实现催化剂的有效回收。MCNOs/CdS在可见光下催化降解RhB的一级反应动力学直线有较好的拟合度,表明制备的催化剂有较好的催化活性。

关键词: 硫化镉, 磁性纳米洋葱碳, 光催化, 降解机理, 一级反应动力学

Abstract: The MCNOs/CdS photocatalysts with different magnetic nanosized carbon (MCNOS) loads (0%, 1%, 3%, 5%) were prepared by hydrothermal synthesis. It was characterized by XRD, SEM, FT-IR, XPS, UV-Vis and VSM. The influence of MCNOs loading ratio on RhB performance and mechanism of catalyst in visible light degradation was investigated. The results show that MCNOs can effectively improve the photocatalytic effect of CdS. The degradation rate of 3%MCNOs compound is 96%, which is 30% higher than that of pure CdS. Magnetic analysis shows that it has good paramagnetism and can realize effective recovery of catalyst. The first-order reaction kinetic line of MCNOs/CdS photocatalyst degradation of RhB under visible light has a good degree of fit, indicating that the prepared catalyst has good catalytic activity.

Key words: cadmium sulfide, magnetic nano onion carbon, photocatalysis, degradation mechanism, first-order reaction kinetic

中图分类号:

张静, 师倩莹, 龚浩, 郭雨菲, 张卫珂. MCNOs/CdS双效光催化剂的制备及其性能研究[J]. 人工晶体学报, 2021, 50(8): 1485-1495.

ZHANG Jing, SHI Qianying, GONG Hao, GUO Yufe, ZHANG Weike. Preparation and Properties of MCNOs/CdS Dual-Effect Photocatalyst[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(8): 1485-1495.

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