纳米Ag/ZnO微波辅助合成与微波增强光催化罗丹明B  

Microwave-assisted synthesis of nano Ag/ZnO and its microwave enhanced photocatalytic properties for Rhodamine B

作　　者：李莉[1,2] 张秀丽[1] 李恩帅[1] 于岩[1] 段喜鑫[1] 赵丽杰[1] 白丽明[1] 赵月红[1] 

机构地区：[1]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006 [2]黑龙江省高校复合改性材料重点实验室,黑龙江齐齐哈尔161006

出　　处：《化学研究与应用》2014年第10期1575-1583,共9页Chemical Research and Application

基　　金：黑龙江省教育厅科学技术项目(No.12511592)

摘　　要：本文通过微波辅助、程序升温溶剂热以及煅烧等不同方法制备了系列纳米复合材料Ag/ZnO,并采用X-射线衍射(XRD)、紫外-可见漫反射吸收光谱(UV-Vis/DRS)、X射线光电子能谱(XPS)、氮气吸附-脱附测定以及扫描电子显微镜配合X-射线能量色散谱仪(SEM-EDS)等测试手段对上述合成材料的晶型结构、形貌及表面物理化学性质进行了表征。结果表明,合成过程中辅以微波后其纤锌矿晶型结构未发生明显变化。但同时,其光的吸收性质以及粒子尺寸、形貌以及颗粒分布等方面则有较大改变。其中,经微波辐射、程序升温溶剂热以及煅烧三步处理的样品(mcd-Ag/ZnO)更多呈现规则的六棱柱结构。在紫外光照射和微波辐射下,合成产物光催化降解罗丹明B的实验结果显示,经微波辅助合成的Ag/ZnO光催化活性较未经微波处理样品的活性有较大提高,且明显高于市售P25。同时,mcd-Ag/ZnO在微波辐射下的光催化活性也被有效增强。The nano-composite Ag/ZnO was prepared by different method including microwave-assisted synthesis and temperature-programmed hydrothermal treatment or calcination,and the phase structures,morphology and surface physical and chemical proper-ties were well charactered by X-ray diffraction （ XRD ） , diffuse reflectance （ UV-Vis/DRS ） , X-ray photoelectron spectroscopy （XPS）,nitrogen adsorption/desorption and scanning electron microscope with energy dispersive spectrometer（SEM-EDS）. The re-sults showed that the wurtzite crystal structure of the materials did not change significantly in the synthesis process supplemented microwave. But at the same time, the optical absorption properties, particle size, morphology and particle size distribution had changed quite drastically. In addition,mcd-Ag/ZnO formed by the three process of microwave-assisted synthesis combined with tem-perature-programmed hydrothermal treatment and calcination was exhibited the hexagonal prism structure. The photocatalytic activi-ties of the as-prepared materials were studied by the UV and microwave-enhanced photodegradation of Rhodamine B and the results showed that the photocatalytic activities of Ag/ZnO by microwave-assisted synthesis had greatly improved comparing with samples without microwave treatment,moreover,which were higher than that of P25. In addition,the photocatalytic performance of mcd-Ag/ZnO under microwave irradiation can be effectively enhanced.

关 键 词：Ag/ZnO 程序升温溶剂热法 微波 光催化 罗丹明B 

分 类 号：O644[理学—物理化学]