摘要
以谷氨酸G氟硼酸（GluBF4）离子液体水溶液为反应介质,以物质的量比为1∶6的二水合醋酸锌[Zn（Ac）2？？2H2O]和NaOH为原料,室温下制备前驱体,再微波辅助加热制备了微/纳米ZnO粉体,获得了单一形貌较高比表面积微/纳米ZnO绒球.利用扫描电镜（SEM）、X射线衍射（XRD）、比表面（BET）、能谱（EDS）等对产物进行了结构与性能表征.所得产物为六方晶系纤锌矿结构,绒球直径在1.6-3.0μm之间,粒径平均尺寸20.4nm,绒球比表面积为28.3m^2/g,产物纯度高,收率95.6%.该纳米材料在自然光下表现出较高的光催化活性和形态稳定性.分别配制浓度为10mg/L的100mL甲基橙（methyl orange,MO）、溴甲酚绿（bromocresol green,BG）水溶液,30mg纳米ZnO为光降解催化剂,太阳光激发下5h脱色率分别达74.3%和86.4%,重复利用5次,催化剂形貌不变、重量未发生变化。
Micro / nano ZnO with pomponlike shapes has been successfully synthesized by using Zn(Ac)2·2H2O and Na OH( 1∶ 6,n / n) as the raw materials and the glutamate fluoboric acid ionic liquid aqueous solution as the reaction medium at the room temperature( 25 ℃,20 min) and then under microwave heating( 80 ℃,10 min). The synthesized samples were characterized by scanning electron microscopy combined with energy disperse X-ray analysis( SEM-EDS),X-ray powder diffraction( XRD) and the brunauer-emmett-teller( BET) analysis. The product has hexagonal( wurtzite)structure,the diameter of the pomponlike ZnO was approximately 1. 6-3. 0 μm,the particle size of the powder was about20. 4 nm,and the specific surface area of the pomponlike ZnO was 28. 3 m2/ g,the yield of the product with high purity was about 95. 6%. The nano materials obtained have high photocatalytic activity and stability under the sunlight. Using30 mg nano-ZnO as the catalysts for photocatalytic degradation of 100 m L of 10 mg / L methyl orange( MO) and bromocresol green( BG) aqueous solution under the sunlight for 5 h,the decolorization ratios are 74. 3% and 86. 4%,respectively. The morphology and weight change of the materials has not been detected yet after reused 5 runs.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2015年第6期6020-6025,共6页
Journal of Functional Materials
基金
国家级本科生科学研究训练计划立项资助项目(2013J00082)
关键词
离子液体
微波辅助加热
微/纳米ZnO
光催化降解
ionic liquid
microwave assisted heating
micro/nano ZnO
photocatalytic degradation
作者简介
佟拉嘎（1966-）,男,内蒙古兴安人,副教授,主要从事光电功能材料及离子液体在无机纳米材料制备中应用研究.
荣华,E-mail：ronghua＠bipt.edu.cn
