The photocatalytic properties of Ti–Mo oxides prepared by a simple sol–gel route
The photocatalytic properties of Ti–Mo oxides prepared by a simple sol–gel route
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DOI：
10.1007/s10971-013-2973-1
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发表时间：
2013-02
影响因子：
2.5
通讯作者：
K. Gutbrod;C. Zollfrank
中科院分区：
文献类型：
--
作者：
K. Gutbrod;C. Zollfrank
采用溶胶-凝胶法制备了不同比例的二氧化钛和水滑石混合粉体。将溶胶干燥并随后在300、500和700 °C下煅烧。根据初始溶胶中Ti和Mo的比例以及煅烧温度的不同，可以形成Ti掺杂的MoO 3、TiO 2/MoO 3或Mo掺杂的TiO 2。所制备的样品，其特征在于通过扫描电子显微镜与附加的X-射线色散能量分析，X-射线衍射，拉曼光谱，气体吸附和光学特性的紫外/可见光谱。后者用于分析在可见光照射下对亚甲基蓝溶液的光催化脱色性能。钼含量和焙烧温度对催化剂的物相组成、比表面积和光催化活性均有影响。样品中的最终钼含量还取决于煅烧温度。Ti掺杂MoO 3的光催化性能最佳。
Powders containing mixtures of titania and molybdite in different ratios were prepared by sol–gel processing. The sols were dried and subsequently calcined at 300, 500 and 700 °C. Depending on the ratio of Ti and Mo in the initial sol and the calcination temperature, Ti-doped MoO3, TiO2/MoO3or Mo-doped TiO2have been formed. The as prepared samples were characterised by scanning electron microscopy with attached X-ray dispersive energy analysis, X-ray diffractometry, Raman spectroscopy, gas adsorption and optical characterisation by ultraviolet/visible spectroscopy. The latter was used for the analysis of the photocatalytic properties on the decolourisation of methylene blue solutions under visible light irradiation. The phase composition, the specific surface and the photocatalytic activity were influenced by the molybdenum content and the calcination temperature. The final molybdenum content in the samples additionally depends on the calcination temperature. The optimum photocatalytic properties were observed or Ti-doped MoO3.