钼酸锶纳米纺锤的微乳合成与表征

Microemulsion Synthesis and Characterization of SrMoO_4 Nanospindles

本文通过自制Gemini表面活性剂发展的新型微乳体系,合成出尺寸均一的SrMoO4纳米纺锤。采用XRD,SEM,FI-IR和UV-Vis等进行了表征。研究表明,产物属于四方晶系的白钨矿结构,钼酸锶呈纳米纺锤状结构,且微乳合成参数影响产物的形貌和尺寸。红外光谱测得[MoO4]2-四面体中Mo-O键的强反对称伸缩振动透射带。基于紫外-可见吸收光谱,得到产物的光学带隙(Egap≈3.88eV)。光致发光结果表明,SrMoO4纳米纺锤的室温荧光发射峰位于紫区(389nm),相对体相材料蓝移26nm。

Uniform strontium molybdate （SrMoO4 ） nanospindles were obtained by novel microemulsion method based on self-made Gemini surfaetant, the products were characterized by XRD, SEM, FI-IR and UV-Vis. The results indicated that these nanospindles present seheelite-type tetragonal structure, they were spindle-like nanostructure, and microemulsion synthesis parameters affeeted their morphologies and sizes. FI-IR sepctra revealed their strong anti-symmetry stretching mode of Mo-O band in [ MoO4 ] 2- tetrahedrons. The optical band gap of SrMoO4 nanospindles （Egap ≈ 3.88 eV） was caculated from UV-Vis spectra. An intense photoluminescence emission at room temperature with maximum peak at 389 nm （violet region） was observed for SrMoO4 nanospindles, which blue-shifted about 26 nm when comparing with corresponding bulk crystals.