Abstract

Ag/BiOCl nanocomposites used for photodegradation of methylene blue (MB) and methyl orange (MO) under UV and visible light were synthesized by a combination of hydrothermal method and microwave-assisted deposition method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS) and absorption spectroscopy. In this research, cubic metallic Ag nanoparticles were deposited on top of tetragonal BiOCl nanoplates and Ag nanoparticles on top of 10% Ag/BiOCl nanocomposites exist as metallic Ag⁰. Ag/BiOCl nanocomposites showed significantly enhanced photocatalytic performance in degrading of MB and MO better than that of pure BiOCl nanoplates within 300 min under UV light irradiation. 10% Ag/BiOCl nanocomposites showed the highest degradation of MB of 96.66% and MO of 88.64% with extremely good in photostability.

摘要

结合水热法和微波辅助沉积法合成了用于紫外和可见光光降解亚甲基蓝（MB）和甲基橙（MO）的Ag / BiOCl纳米复合材料。通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），选择区域电子衍射（SAED），X射线光电子能谱（XPS）和吸收能谱对制备的样品进行表征。在这项研究中，立方金属Ag纳米颗粒沉积在四方BiOCl纳米板上，而10％Ag / BiOCl纳米复合材料顶部的Ag纳米颗粒以金属Ag ^0的形式存在。在紫外光照射下，Ag / BiOCl纳米复合材料在300分钟内表现出比纯BiOCl纳米板更好的降解MB和MO的光催化性能。10％的Ag / BiOCl纳米复合材料显示MB的最高降解为96.66％，MO的最高降解为88.64％，并且光稳定性极好。