微波水热法制备氧化锌纳米粉体及其光催化性能  

Preparation of Zinc Oxide Nano Powder by Microwave Hydrothermal Method and Its Photocatalytic Property

作　　者：王艳[1] 谈国强[1] 苗鸿雁[1] 宋丽花[1] 

机构地区：[1]陕西科技大学,陕西西安710021

出　　处：《稀有金属材料与工程》2011年第S1期32-35,共4页Rare Metal Materials and Engineering

基　　金：陕西省自然科学基础研究项目(SJ08E102;SJ08E104);陕西省自然科学基础研究项目(2010JM6017)资助;陕西科技大学科研创新团队资助基金(TD09-05);陕西科技大学研究生创新基金(SUST-A04)

摘　　要：以ZnSO4·7H2O为原料,NaOH为矿化剂,采用微波水热法成功制备出氧化锌纳米粉体,研究了NaOH浓度对ZnO粉体的物相,形貌以及光催化性能的影响。XRD表明所得粉体均为纯相六方纤锌矿结构的氧化锌,晶粒尺寸介于39~58nm之间;FE-SEM和TEM表明,当NaOH浓度从0.5mol/L逐渐增大到4.0mol/L时,颗粒形貌由碎片状变为层片花状结构。利用300W高压汞灯作为光源,对质量浓度为20mg/L的罗丹明B溶液进行光催化降解实验,在光照120min后,不同矿化剂浓度下制备的氧化锌催化剂对罗丹明B的降解率均接近100%,说明当前条件下制备的ZnO粉体对罗丹明B具有较高的光催化活性。Zinc oxide nano-powder was prepared by microwave hydrothermal method from zinc sulfate heptahydrate and mineralizer sodium hydroxide. The effects of mineralizer concentration on phase, morphology and ptotocatalytic property were studied. The XRD results reveal that the products belong to pure hexagonal wurtzite structure and the grain size is about 39-58 nm. FE-SEM and TEM show that when mineralizer concentration increases from 0.5 mol/L to 4.0 mol/L, the shapes are changed from little slice to nanosheet-assembled hierarchical structure. A 300 W high pressure mercury lamp was used as light source, and rhodamine B aqueous solution (20 mg/L) was chosen as photocatalytic degradation dye. After 120 min irradiation, the degradation rate of rhodamine B is close to 100% over different photocatalystis, indicating that zinc oxide nano-powder prepared have good photocatalytic activity.

关 键 词：微波水热法 氧化锌 光催化 

分 类 号：X13[环境科学与工程—环境科学]