Influence of the Ti content on the photocatalytic oxidation of 2-propanol and CO on TiSiBEA zeolites
Influence of the Ti content on the photocatalytic oxidation of 2-propanol and CO on TiSiBEA zeolites
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DOI：
10.1016/j.catcom.2011.12.010
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发表时间：
2012-03
影响因子：
3.7
通讯作者：
S. Dzwigaj;J. Nogier;M. Che;Masakazu Saito;T. Hosokawa;E. Thouverez;M. Matsuoka;M. Anpo
中科院分区：
文献类型：
--
作者：
S. Dzwigaj;J. Nogier;M. Che;Masakazu Saito;T. Hosokawa;E. Thouverez;M. Matsuoka;M. Anpo
TixSiBEA（x=1.5、3.2和5.8 Ti重量%）沸石通过早先报道的两步合成后方法（Chem.Commun.Chem.2004）制备。1998，87）。漫反射（DR）紫外-可见光谱和光致发光数据表明，在Ti1.5SiO2和Ti3.2SiO2分子筛中，钛离子主要以孤立的四面体骨架存在。这些离子，在其激发的三重态容易与CO分子相互作用所示的光致发光数据，被认为是活性位点的光催化液相氧化2-丙醇溶解氧和光催化气相氧化CO的N2 O的催化测量所建议的。
TixSiBEA (x=1.5, 3.2 and 5.8 Ti wt.%) zeolites were prepared by a two-step postsynthesis method reported earlier (Chem. Commun. 1998, 87). Diffuse reflectance (DR) UV–vis and photoluminescence data suggest that mainly isolated tetrahedral framework Ti ions are present in Ti1.5SiBEA and Ti3.2SiBEA zeolites. These ions which in their excited triplet state easily interact with CO molecules as shown by photoluminescence data, are believed to be the active sites of the photocatalytic liquid phase oxidation of 2-propanol by dissolved oxygen and of photocatalytic gas phase oxidation of CO by N2O as suggested by catalytic measurements.