Issue 19, 2017

Crystallization mechanism and catalytic performance of TS-1 synthesized by an aerosol-assisted method

Abstract

TS-1 was synthesized by an aerosol-assisted method. SiO2–TiO2 amorphous powder was prepared by an aerosol process from an aqueous solution of silicon and titanium sources under acid conditions, which can make titanium ions highly distributed without complex operations. The powder was crystallized with a given amount of template agent (25% TPAOH) under autogenous pressure. Without adding extra water, the crystallization system maintained a high concentration of template agent, which can significantly reduce the amount of template and the discharge of polluted water. TS-1 with different Si/Ti ratios and different crystallization times were synthesized from the SiO2–TiO2 amorphous powder by the aerosol-assisted method. The structure, composition and morphology of TS-1 were characterized by X-ray diffraction, UV-vis spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray fluorescence spectrometry (XRF) and electron microscopy. The crystallization mechanism of TS-1 has been studied at different crystallization times. The results indicated that the crystallization process followed a liquid-phase mechanism. The incorporation of the Ti species into the framework was delayed as compared to that of the Si species. Furthermore, TS-1 exhibited good catalytic performance in propylene epoxidation with hydrogen peroxide.

Graphical abstract: Crystallization mechanism and catalytic performance of TS-1 synthesized by an aerosol-assisted method

Supplementary files

Article information

Article type
Paper
Submitted
22 Feb 2017
Accepted
04 Apr 2017
First published
04 Apr 2017

CrystEngComm, 2017,19, 2695-2701

Crystallization mechanism and catalytic performance of TS-1 synthesized by an aerosol-assisted method

Z. Guo, G. Xiong, L. Liu, W. Song and Q. Jia, CrystEngComm, 2017, 19, 2695 DOI: 10.1039/C7CE00364A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements