CAJ | 학술논문

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。
본문통과미파보조、정서승온용제열이급단소등불동방법제비료계렬납미복합재료Ag/ZnO,병채용X-사선연사(XRD)、자외-가견만반사흡수광보(UV-Vis/DRS)、X사선광전자능보(XPS)、담기흡부-탈부측정이급소묘전자현미경배합X-사선능량색산보의( SEM-EDS)등측시수단대상술합성재료적정형결구、형모급표면물이화학성질진행료표정。결과표명,합성과정중보이미파후기섬자광정형결구미발생명현변화。단동시,기광적흡수성질이급입자척촌、형모이급과립분포등방면칙유교대개변。기중,경미파복사、정서승온용제열이급단소삼보처리적양품( mcd-Ag/ZnO)경다정현규칙적륙릉주결구。재자외광조사화미파복사하,합성산물광최화강해라단명B적실험결과현시,경미파보조합성적Ag/ZnO광최화활성교미경미파처리양품적활성유교대제고,차명현고우시수P25。동시,mcd-Ag/ZnO재미파복사하적광최화활성야피유효증강。
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.