Synthesis of TS-1 zeolites from a polymer containing titanium and silicon

The synthesis of TS-1 zeolites is regarded as a milestone in zeolite history, and it has led to the revolution of the green oxidation system of using H 2 O 2 as an oxidant, leaving only water as the byproduct. However, because of the highly hydrolyzable titanium source, the preparation of TS-1 requi...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2021-03, Vol.9 (1), p.625-6213
Main Authors: Xing, Jiacheng, Yuan, Danhua, Liu, Hanbang, Tong, Yansi, Xu, Yunpeng, Liu, Zhongmin
Format: Article
Language:English
Subjects:
Chemical synthesis
Crystallization
Hexanes
Hydrogen peroxide
Hydrolysis
n-Hexane
Oxidants
Oxidation
Oxidizing agents
Polymers
Reagents
Silicon
Titanium
Zeolites
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Summary:The synthesis of TS-1 zeolites is regarded as a milestone in zeolite history, and it has led to the revolution of the green oxidation system of using H 2 O 2 as an oxidant, leaving only water as the byproduct. However, because of the highly hydrolyzable titanium source, the preparation of TS-1 requires complex synthesis conditions. Moreover, the difference in the hydrolysis rate between the silicon source and titanium source tends to increase the difficulty of titanium insertion into the framework, and it is easy to generate extra-framework Ti species during the synthesis. Here, a high-quality TS-1 zeolite with a large external surface area and free of extra-framework Ti species has been successfully synthesized by using a kind of novel polymer containing titanium and silicon. Due to the high hydrolysis resistance of the polymer reagent, a good matching of the hydrolysis rate between the silicon source and the titanium source is realized during crystallization, which facilitates the incorporation of titanium into the framework. Furthermore, the TS-1 zeolite exhibited excellent catalytic performance in n -hexane oxidation with hydrogen peroxide as the oxidant. This method of synthesizing zeolites from polymers is expected to be widely applied for the synthesis of other titanium-containing zeotype materials. A kind of high hydrolysis resistant polymer was used to synthesize TS-1 zeolites. Extra-framework Ti species free TS-1 zeolites with large external surface areas were synthesized and exhibited high catalytic performance in n -hexane oxidation.
ISSN:2050-7488
2050-7496
DOI:10.1039/d0ta11876a