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IJEMS Vol.19(3) [June 2012] >


Title: Synthesis, characterization and catalytic properties of Cr-containing silica gel
Authors: Bai, Yongxiao
Hu, Weiwei
Hu, Xinjun
Bao, Yan
Zhu, Bochao
Yao, Peihong
Jia, Junji
Keywords: Silica gel
Cethyltriethylammonium bromide
Chromium nitrate nonahydrate
Framework
Coordination
Issue Date: Jun-2012
Publisher: NISCAIR-CSIR, India
Abstract: Chromium-containing silica gel with variable Si/Cr ratios has been synthesized at ambient temperature by a sol-gel method with the addition of different amounts of Cr precursor. A combination of measurements is used to characterize the chromium-containing silica gel. All the analysis indicates following this synthesis route, it is possible to prepare materials without forming extra wall Cr2O3. And the results show that polychromate is absent in the silica gel materials, while the Cr (VI) of calcined chromium-containing silica gel is present as a monochromate species. Also, it has high activity for the selective oxidation of styrene, which is analyzed periodically by means of gas chromatograph.
Page(s): 209-214
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.19(3) [June 2012]

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