摘要
Abstract
Zinc oxide(ZnO)samples with silver(Ag)doping concentrations of 0,0.2%,0.5%,and 1%are synthesized by microwave-assisted hydrothermal method at the growth temperatures of 80-140℃.The effects of Ag-doping on the structural,morphological,and optical properties of ZnO are investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),and room-temperature photoluminescence(PL).The XRD results show that the crystal quality of ZnO with high Ag-doping concentration is the best at low growth temperature,while that of pure ZnO is better than that of doping samples at high temperatures.The SEM results show that formed ZnO holds the hollow nanostructure,and the morphology of pure ZnO samples gradually transforms from a hollow rod-like structure to a multilayer lamellar structure with the increase of growth temperature,while the hollow rod-like struc-ture gradually disintegrates and the sample particles decrease with the increase of Ag concentration,which is in line with the basic theory of mesoporous formation—the Kirkendall effect.The PL results show a trend of increasing and then decreasing for the visible emissions of ZnO with the increasing doping concentration of Ag,while the energy band becomes narrower.The doping concentration of Ag and growth temperature of the ZnO samples play a key role in the structural,morphological,and optical properties of ZnO.关键词
微波水热法/ZnO/Ag掺杂/柯肯达尔效应/光学性质Key words
microwave hydrothermal method/ZnO/Ag doping/Kirkendall effect/optical property分类
通用工业技术
