用水热法制备的Ba_(1-x)Pb_xWO_4微晶及其发光性能研究  

Hydrothermal synthesis of Ba_(1-x)Pb_xWO_4 microcrystallines and their luminescent properties

作　　者：魏艳艳[1] 赖欣[1] 毕剑[1] 李波[1] 罗怡[1] 高道江[1] 

机构地区：[1]四川师范大学化学与材料科学学院,四川成都610066

出　　处：《功能材料》2010年第9期1532-1535,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50472103);四川省青年科技基金资助项目(08ZQ026-054);四川师范大学科研基金资助项目(08KYL02);四川省教育厅重点资助项目(09ZA092)

摘　　要：采用水热法制备了Ba1-xPbxWO4固溶体微晶,通过XRD、SEM、荧光分析等测试手段,研究了微晶的晶相结构、表面形貌及室温光致发光特性。结果表明,当x从0～1.0变化时,Ba1-xPbxWO4固溶体微晶的表面形貌由四方锥型向树枝状变化。在270nm紫外光激发下,其发射光谱均呈现两个发射峰,即位于320nm左右的弱发射峰和400～470nm左右的强发射峰,前者为WO42-四面体的本征发射,其强度和波长随x值变化不大;而后者为掺入的Pb2+引起的激活发射峰,掺入Pb2+量(即x)对其强度和发射波长有较大的影响。当x=0.03时,微晶发射强度达到最强。Ba1-xPbxWO4 solid solution microcrystallines were synthesised by hydrothermal method;the crystal structure,surface morphology and room temperature photoluminescence properties of the as-synthesized microcrystallines were investigated by through X-ray diffraction （XRD）,scanning electron micrograph （SEM） and fluorescence analysis （FA）.Our results show that the morphology of Ba1-xPbxWO4 microcrystallines changed from taper-like to the dendritic when x changed from 0 to 1.0.With the excitation of 270nm ultroviolet irradition,the emission spectra of Ba1-xPbxWO4 microcrystallines all exhibit two emission peaks：one is the weak emission peak located at about 320nm and the other one is the strong emission peak located at around 400-470nm.The former is intrinsic emission peak of WO2-4 complex ion,and its intensity and wavelength are less change with the variety of x;while the latter is an activation emission peak of the doping Pb2＋ and the doping level of Pb2＋（i.e.x） has significant influence on the emission intensity and wavelength of the emission peak.When x=0.03,the Ba1-xPbxWO4 microcrystalline show the maximal emission intensity.

关 键 词：Ba1-xPbxWO4固溶体 水热法 制备 发光性能 

分 类 号：TB383[一般工业技术—材料科学与工程]