Synthesis and Photoluminescent Properties of Strontium Tungstate Nanostructures

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• 作者：Lingna Sun ; Qingrong Guo ; Xinglong Wu ; Shengjun Luo ; Wanlong Pan ; Kunlin Huang ; Junfeng Lu ; Ling Ren ; Minhua Cao ; Changwen Hu
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：January 18, 2007
• 年：2007
• 卷：111
• 期：2
• 页码：532 - 537
• 全文大小：652K
• 年卷期：v.111,no.2(January 18, 2007)
• ISSN：1932-7455

文摘

Strontium tungstate nanoparticles with diameters of 40-50 nm, nanopeanuts with diameters of 100-150 nm,and nanorods with a rough surface were controllably synthesized by a solvothermal-mediated microemulsionmethod. Various comparison experiments showed that several experimental parameters, such as the molarratio (w) between water and CTAB and the concentration of reactants, played important roles for themorphological control of Sr(NO₃)₂ nanostructures. When the concentration of the Sr(NO₃)₂ aqueous solutionwas kept at 0.3 M, the morphology of the as-synthesized products elongated from nanospheres, to nanopeanuts,and to nanorods with the increase of the w value. A possible mechanism is proposed for the selective formationof the different morphologies. The SrWO₄ samples with different morphologies exhibited differentphotoluminescent properties. X-ray powder diffraction, transmission electron microscopy, selected area electrondiffraction, and field-emission scanning electron microscopey were used to characterize these products.