均相沉淀法制备ZnO微球

Synthesis of ZnO spheres via homogeneous co-precipitation

在75℃下采用均相沉淀法制备了ZnO微球,并运用XRD、SEM等方法表征了制得的样品,考察了反应时间和磷钨酸浓度对ZnO形貌的影响,讨论了纳米氧化锌的生长机理。结果表明:乙酸锌浓度为0.025 mol/L,三乙醇胺(TEA)浓度为0.100 mol/L,催化剂HPW浓度为1.00×10-3 mol/L条件下,反应2 h制得的ZnO微球粒径均一,分散性良好。

Nano/micron-sized ZnO spheres were fabricated by homogeneous co-precipitation at 75 ℃.The prepared spheres were characterized by X-ray diffraction（XRD）and scanning electron microscope（SEM）.The effect of reaction time and HWP（H3PW12O40∶HPW）concentration was investigated.The result showed that the ZnO spheres after 3h reaction had uniform sizes and dispersed well when the concentration of Zinc acetate dihydrate,TEA and HPW were 0.025 mol/L,0.100 mol/L and 1.00×10-3 mol/L respectively.