高压静电场诱导下介孔WO_3粉体的制备及表征

Preparation and characterization of mesoporous WO_3 powder treated by high voltage electrostatic field

利用溶胶-凝胶与分子模板法相结合,在高压静电场诱导分子模板作用下,成功制备了孔洞分布均匀的介孔WO3粉体。利用粉末X射线衍射仪、N2吸附-脱附比表面及孔径分析仪、傅立叶变换红外光谱仪(FT-IR)等测试手段,通过对样品的晶态结构、孔洞结构参数、透射光谱特性及化学键态结构的对比,详细研究了外加电场的作用时间对分子模板及WO3粉体材料微观结构的影响。实验结果表明,在2 kV/cm的电场强度下处理2 h所制得的粉体WO3有更发达的比表面积和气体通道。

The preparation of mesoporous tungsten trioxide from tungstic acid precursors with the addition of an organic stabilizer（block copolymer）via a sol-gel method was reported.Electric fields were used to direct the ori-entation of block copolymers nanostructures in solution.The samples have been structurally characterized by powder X-ray diffraction（XRD）,N2 adsorption-desorption surface and pore size analyzer,Fourier transform in-frared spectrometer （FT-IR）.The powder at suitable time consisted of larger surface volume ratio and small pore size.The optimal processing time was 2 h at electric field strength of 2 kV/cm.