中文摘要：

以介孔二氧化硅（KIT-6）为硬模板，硅钨酸为钨源，用硬模板法制备WO3-SiO2复合材料，再利用HF除去二氧化硅，得到了介孔三氧化钨材料．用X射线衍射（XRD）、能量扩散X射线（EDX）、高分辨透射电镜（HRTEM）、N2吸附．脱附等表征手段，对制备复合材料的物料比、煅烧温度以及不同分散剂等条件进行了考察．结果表明，硅钨酸与硅介孔的物料比（m（WO3）／m（SiO2））在3：1到4：1之间，在600—750℃下煅烧，能制备结构较好的介孔氧化钨．乙醇和蒸馏水为分散剂时，用乙醇为分散剂所得的介孔WO3材料具有更高的比表面积和孔体积．

英文摘要：

Mesoporous tungsten oxides were prepared by a hard templating method using mesoporous silica dioxide （KIT-6） as the hard template, silicotungstic acid （HO40SiW12·nH2O） as the source of tungsten and by removing silica dioxide with HF. The mesoporous tungsten oxides were characterized by X-ray diffraction （XRD）, energy dispersive X- ray（EDX）, high resolution transmission electron microscopy （HRTEM）, and nitrogen adsorption-desorption isotherms. The influences of the mixing ratio of the silicotungstic acid and mesoporous silica, the calcination temperature of the mixture, and different dispersants on the preparation of the mesoporous tungsten oxides was investigated. Results showed that mesoporous tungsten oxides could be obtained at calcination temperatures of 600-750℃ and that mixing mass ratios of silicotungstic acid and mesoporous silica （m（WO3）/m（SiO2）） should be 3：1-4：1. Larger surface area and pore volume were obtained for the mesoporous tungsten oxide when using ethanol instead of distilled water as dispersant.