摘要
以TaCl5和Na2WO4为原料,采用水热法在170℃制备性能良好的掺钽钨青铜(TaxWO3)纳米线。利用X射线衍射技术(XRD)、扫描电镜(SEM)、紫外可见漫反射光谱(UV-Vis)及拉曼光谱(Raman)等分析手段,对该材料的结构、形貌及光谱性能进行表征。XRD结果表明:TaxWO3纳米材料为六方相结构氧化钨,当TaxWO3中Ta/W摩尔比小于0.04时,晶胞参数随着掺杂量的增大而逐渐增大,当掺杂量达到大于0.04后保持基本不变。UV-Vis光谱表明,随着钽掺杂量的增大,紫外吸收峰发生红移,即能隙逐渐减小。Raman光谱显示:随钽掺杂量的增大,Raman峰位逐渐向低波数方向移动,同时振动峰逐渐宽化,进一步证明了钽掺杂对氧化钨结构的影响。光催化降解罗丹明B的实验显示,制备的TaxWO3具有较高的光催化活性。
Tantalum tungsten bronze（TaxWO3 ）nanowires were successfully synthesized via hydrothermal method using TaCl5 and Na2WO4 ·2H2O as raw materials .The morphology ,crystal structure and optical properties of synthesized products were characterized by means of XRD ,TEM ,SEM ,UV-Vis and Raman technologies .The XRD results showed that TaxWO3 nanowi-re exhibited hexagonal structure .By increasing the doping content ,the cell parameter was kept increasing gradually till Ta/W=0.04 ,then it remained almost constant .The UV-Vis diffraction spectrum analysis showed that the absorption peaks redshifted ,＆amp;nbsp;the band gap energy decreased with increasing the doping content .The Raman peaks moved with a downshift ,and the peak gradually became broader ,which further proved the influence of the tantalum doping for tungsten oxide .The reactions of decom-posing liquid rhodamine B solution showed that the nanosized TaxWO3 had a high photo-catalytic activity .
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2015年第1期24-28,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金青年基金项目(51103140)
中国工程物理研究院科学发展基金项目(2012B0301034)资助
关键词
水热法
离子掺杂
光谱特征
光催化
Hydrothermal method
Ions doping
Spectra characterization
Photo-catalytic
作者简介
牟婉君，女，1983年生，中国工程物理研究院核物理与化学研究所助理研究员e-mail：muwj1012@163．com
通讯联系人e-mail：inpc207@163．com
