Cr_2WO_6纳米晶的水热法制备及其对亚甲基蓝的选择性吸附性能  

Hydrothermal synthesis Cr_2WO_6 nanocrystallites with selective adsorption properties to methylene blue in water

作　　者：黄剑锋[1] 周文敏[1] 李嘉胤[1] 曹丽云[1] 卢靖[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6期44-47,共4页Journal of Shaanxi University of Science & Technology

基　　金：国家科技支撑计划项目(2013BAF09B02);陕西科技大学博士科研启动基金项目(BJ14-16)

摘　　要：以Cr(NO3)3·6H2O、Na2WO4·2H2O为原料,去离子水为溶剂,采用水热法在不同pH条件下成功制备出颗粒状结构的Cr2WO6纳米晶。采用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱分析(EDS)和Lambda 950分光光度计分别对产物的物相、形貌和光学性能进行表征,讨论了不同pH对Cr2WO6纳米晶的结构的影响,并对合成粉体的选择性吸附性能进行了研究.结果表明:在水热条件下,前驱体的酸碱性对合成Cr2WO6纳米晶的结构有很明显的影响,只有在弱酸条件下才可以得到Cr2WO6纳米晶.此外,与传统固相法得到的产物相比,水热条件下制备的Cr2WO6纳米晶对亚甲基蓝具有明显优越的选择性吸附性能.Cr2 WO6 nanocrystallites with particle morphology were successfully synthesized by using Cr（NO3 ）3 · 6H2 O ,Na2 WO4 · 2H2 O as raw materials and deionized water as solvent via a hydrothermal method .The phase composition ,morphologies and optical performances of the asprepared samples were characterized by XRD （Xray diffractometer） ,SEM （Scanning electron microscope） ,EDS （Energy dispersive spectrometer ） and Lambda 950 spectrophotometer and the influence of different pH value on the structure and the selective adsorption properties of the products were investigated .Results show that the acidbase property of precursor has an obvious effect on the phase of Cr2 WO6 nanocrystallites under the hydrothermal conditions ,in which the Cr2 WO6 nanocrystallites could only be obtained with weak acidity of the reaction system .In addition ,the Cr2 WO6 nanocrystallites were found to exhibit obvious higher selectivity and superior activity to adsorb methylene blue than conventional calcined products .

关 键 词：水热法 Cr2WO6纳米晶 选择性吸附性能 

分 类 号：TB34[一般工业技术—材料科学与工程]