Transition metal doped mesoporous titania with a crystalline framework as catalysts for oxidation of -bromotoluene to -bromobenzaldehyde

2008, Volume 2, Issue 3

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Frontiers of Chemical Science and Engineering >> 2008, Volume 2, Issue 3 doi: 10.1007/s11705-008-0044-x

Transition metal doped mesoporous titania with a crystalline framework as catalysts for oxidation of -bromotoluene to -bromobenzaldehyde

1.Department of Applied Chemistry, Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, Yunnan University; 2.Yantai Shougang Dongxing (Group) Co.

Available online: 2008-09-05

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Abstract

Transition metal M (M = Mn, Fe, Co, Ni, Cu, and Zn) doped mesoporous titania with a crystalline framework was employed as catalysts for the oxidation of -bromotoluene (PBT) to -bromobenzaldehyde (BBD) in acetic acid using aqueous hydrogen peroxide as oxidant. It was found that mesoporous TiO doped with those metals (Fe, Co and Ni) whose atomic radii are relatively smaller exhibited higher conversion rate of PBT. Among these catalysts, the Co/meso-TiO exhibited high substrate conversion and good product (-bromobenzaldehyde) selectivity plus it can be reused once with almost the same activity. The effect of different Ti/Co (molar) ratio on the activities of Co/meso-TiO was also investigated.

Keywords

selectivity ; conversion ; -bromobenzaldehyde ; aqueous hydrogen ; oxidation

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