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Issue 1, 2012
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Synthesis of mesoporous chromium phosphatesvia solid-state reaction at low temperature

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Abstract

Using solid-state reaction at low temperature (SSRLT), mesoporous chromium phosphates were successfully synthesized in the presence of a surfactant template, cetyltrimethyl ammonium bromide (CTAB), at a temperature of 353 K without using a water solvent. The synthesized chromium phosphates were characterized by XRD, EDS, HR-TEM, N2-physisorption, TGA-DSC, FT-IR, and UV-vis spectroscopies. It was found that mesoporous chromium phosphate can be formed only at atomic ratios of P/Cr ≥ 1.8. The mesophase at P/Cr = 2.0 showed the highest ordering of pore arrays, with a specific surface area as high as 250.78 m2 g-1 and an average pore size of 3.48 nm. The catalytic performance of the synthesized chromium phosphates was examined using the dehydration of isopropanol to propene as the model reaction. The results indicated that the mesoporous chromium phosphates synthesized via the SSRLT route exhibited significantly higher isopropanol conversions and propene yields than that synthesized via the solution sol–gel route and the non-mesoporous chromium phosphate.

Graphical abstract: Synthesis of mesoporous chromium phosphatesvia solid-state reaction at low temperature

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Article information


Submitted
18 Mar 2011
Accepted
22 Sep 2011
First published
15 Nov 2011

New J. Chem., 2012,36, 139-147
Article type
Paper

Synthesis of mesoporous chromium phosphatesvia solid-state reaction at low temperature

Q. Liu, H. He, Z. Chao, J. Xie and E. Ruchenstein, New J. Chem., 2012, 36, 139
DOI: 10.1039/C1NJ20252A

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