pH对CoWO_4纳米粉体的制备及其吸附性能的影响  

Influence of pH value of precursors on preparation of CoWO_4 nano-powders and its adsorption performance

作　　者：曹丽云[1] 何秀娟[1] 黄剑锋[1] 孔新刚[1] 吴建鹏[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2014年第5期48-51,67,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家科技支撑计划项目(2013BAF09B02);陕西省教育厅科研计划项目(2013JK0942);陕西省科技厅工业攻关项目(2014K08-39);陕西省科研创新团队计划项目(2013KCT-06)

摘　　要：以Co(NO3)2·6H2O和Na2WO4·2H2O为主要原料,去离子水为溶剂,采用稀NaOH和HNO3溶液调节反应前驱液的pH值,利用微波水热法制备出了CoWO4纳米粉体.通过X射线衍射分析仪(XRD)、扫描电子显微镜(SEM)及UV-Vis 2600A型紫外可见分光光度计对产物的物相、微观形貌及吸附性能进行了表征测试.结果表明,在前驱液pH值为6到8时成功地合成了CoWO4纳米粉体,所得产物的结晶性良好、微观形貌均匀且规整;反应前驱液pH值为6时所得产物对亚甲基蓝(MB)染料表现出了较好的吸附特性.CoWO4nano-powders were synthesized by micro hydrothermal method,in which Co（NO3）2·6H2O and Na2WO4·2H2O were used as raw materials.Besides,de-ionized water was used as reaction solvent and NaOH and HNO3 dilution solutions were added in to adjust the pH value of this system.Next,the phase composition of reaction product and its morphology and adsorption performance were characterized by X-ray Diffraction Analysis,Scanning Electron Microscopy and Ultraviolet Spectrophotometer（With the type of UV-Vis2600A）,respectively.The results show that CoWO4nano-powders can be reliably prepared by microwave hydrothermal method when the pH value of precursor lies from 6to 8.The products have good crystallinity and present uniform and homogeneous micro crystal structure.Additionally,the sample synthesized at pH value of 6exhibits the optimal adsorption properties to the methylene blue（MB）dye.

关 键 词：微波水热法 CoWO4纳米粉体 吸附性能 

分 类 号：TB321[一般工业技术—材料科学与工程]