Pandey, J.K. and Maity, Sudip (2016) Synthesis, Characterization of VPO catalyst dispersed on mesoporous silica surface and catalytic activity for cyclohexane oxidation reaction. Microporous and Mesoporous Materials , 223. pp. 121-128. ISSN 1387-1811

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Abstract

A precipitation-deposition method in an organic medium was used to prepare vanadium phosphorus oxide (VPO) catalysts supported on SBA-15 and TUD-1. Oxidation of cyclohexane has been examined over mesoporous silica supported VPO catalyst. The supported VPO catalyst has been characterized by XRD, N2 physisorption, SEM, HRTEM, H2-TPR and NH3-TPD techniques. The characteristic X-ray diffraction patterns of bulk VPO catalyst and VPO catalysts supported on mesoporous SBA-15 and TUD-1 showed that each of them are having well-crystallized vanadyl pyrophosphate [(VO)2P2O7] phase. The vanadium redox centers were easily accessible for supported VPO catalyst. The TUD-1 supported VPO catalyst had higher acidity as found in NH3-TPD studies. The conversion of cyclohexane increased in the case of VPO dispersed on TUD-1 mesoporous material. From SEM and HRTEM results it is found that the nature of the support and VPO loading had a profound influence on the crystallinity, morphology and chemical property of the dispersed VPO phase. The changes in all the property had a prominent role on its catalytic activity for the oxidation of the cyclohexane.

Item Type:	Article
Uncontrolled Keywords:	Oxidation; Cyclohexane; VPO; Mesoporous silica
Subjects:	Respiratory Protection Laboratory
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	01 May 2017 09:41
Last Modified:	01 May 2017 09:41
URI:	http://cimfr.csircentral.net/id/eprint/1673

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