中文摘要：

钨粉和双氧水过氧聚钨酸法，制备出了WO3·0．33H2O纳米粉体。通过XRD、DTA、FT—IR、XPS等测试手段对其晶相、热性能、晶体结构进行分析；循环伏安法研究了WO3·0．33H2O的导带位置；紫外一可见光催化测试表明WO3·0．33H2O既有很好的紫外光催化性能，又有较强的可见光催化性能。

英文摘要：

WO3·0.33H2O nanopowders were synthesized via mixing tungsten with H2O2 in a water bath. The obtained samples were characterized by X-ray diffraction （XRD）, differential thermal analysis （DTA）, X-ray photoelectron spectroscopy （XPS）, cyclic voltammetry （CV）. The UV-visiable photoactivity was evaluated through the photodegradation of methyl orange in aqueous solution. The effects of photoreaction conditions on the photoactivity of the obtained samples were investigated in detail. Cyclic voltammetric measurements showed that WO3·0.33H2O and WO3 have different oxidation-reduction potential. It leads to a higer conductive band of WO3·0.33H2O than H^＋/H2. The experimental results indicated that photoactivity of WO3·0.33H2O was deeply related with the crystal structure and energy band structure.