TITLE:
Development of an Analytical Method for Evaluating the Catalytic Active Sites of Titanium Silicalite Zeolite
AUTHORS:
Xiaoyan Huang, Yan Xue, Xin Gao, Baojun Li, Yiqiang Wen, Xiangyu Wang
KEYWORDS:
Effectively Active Species (EAS), Titanium Silicalite Zeolite, UV-Vis Spectrum, Absorbance
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.6,
June
11,
2015
ABSTRACT:
A simple, quick, sensitive, accurate and
precise method has been developed for evaluating the catalytic active sites of
titanium silicalite-1 (TS-1). The catalytic active sites of titanium silicalite
zeolite depend on the effectively active species (EAS) in TS-1 which react with
specific substrates quickly. However, the EAS was hard to be evaluated with conventional
instruments and techniques in the past. In this paper, the EAS was formed in
TS-1 upon interaction with H2O2, and its presence could be confirmed by UV-vis
spectroscopy which has an absorption peak at 385 nm. The absorbance at 385 nm
was found to be linearly related to time, and when the absorbance and the
increasing rate of absorbance (k) increased, the catalytic performance of TS-1
enhanced.