用反萃界面沉淀法制备氧化锌超细粉体  

Preparation of ultra-fine ZnO powders by interfacial stripping precipitation method

作　　者：徐航[1] 张东翔[2] 徐文国[1] 

机构地区：[1]北京理工大学理学院,北京100081 [2]北京理工大学化工与环境学院,北京100081

出　　处：《功能材料》2008年第4期673-676,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20476010)

摘　　要：以草酸乙醇水溶液反萃Zn-P204-CCl4组成的有机相中的锌离子获得草酸锌前驱体,经450℃条件下煅烧得到的氧化锌粉体。结果表明,有机相中P204浓度的增加、无机相中草酸浓度的降低、乙醇浓度的增加和反应体系温度的降低有利于降低氧化锌粒径。在适宜条件(有机相:P20435%(体积分数);无机相:草酸浓度0.3mol/L,乙醇的浓度80%(体积分数);反应温度为20℃)下,可以制备平均粒径约32nm氧化锌超细粉体,此氧化锌光催化降解亚甲基蓝的最佳投加量为0.4g/L。Zinc oxalate powders were prepared through interracial stripping precipitation method with P2O4 diluted by tetrachloride carbon as an extractant, and oxalic acid ethanol aqueous solution as a reextractant and precipitator. Zinc oxide powders were obtained by decomposing zinc oxalate powder at 450℃. The results showed that the P2O4 contents in the oil phase, oxalic acid, ethanol contents in the water phase and temperature had obviously influence on the size distribution of zinc oxide powders. ZnO powders with the average size of about 32nm was obtained under an optimum condition with P2O4 35% （v/v） in oil phase, H2C2O4 0.3 mol/L and ethanol 80% （v/v） in water phase, reaction temperature 20℃. The kinetics study of the photocatalytic oxidation about ZnO showed the optimum catalyst loadings was 0.4g/L.

关 键 词：反萃界面沉淀 氧化锌 超细粉体 光催化 

分 类 号：O634[理学—高分子化学]