Selective Oxidation of Diphenylmethane Over Cobalt Doped Mesoporous Titania–Silica Catalyst with High Ti Content

• Published in: Catalysis letters Vol. 121; no. 1-2; pp. 63 - 69
• Main Authors: Tang, Lu, Li, Bin, Zhai, Zhongbiao, Li, Junjie, Ou, Encai, Wang, Jiaqiang
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.02.2008; Springer; Springer Nature B.V
• Subjects: Acetic acid; Catalysis; Catalysts; Chemistry; Chemistry and Materials Science; Cobalt; Colloidal state and disperse state; Diphenyl methane; Exact sciences and technology; General and physical chemistry; Hydrogen peroxide; Industrial Chemistry/Chemical Engineering; Organometallic Chemistry; Oxidation; Physical Chemistry; Porous materials; Reaction time; Silicon dioxide; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Titanium; Titanium dioxide; Oxidation of diphenylmethane; Co doped mesoporous titania–silica; Benzophenone; Diphenylmethane; Transition element compounds; Transition metal; Co doped mesoporous titania-silica; Ketone; Cobalt; Porous material; Silica; Mesoporosity; Heterogeneous catalysis; Benzenic compound; Oxidation; Titanium oxide
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-007-9293-4

Cobalt doped mesoporous titania–silica with Ti/Si molar ratio of 0.5 (Co–TiO 2 –SiO 2 ) was synthesized for the oxidation of diphenylmethane in acetic acid using aqueous hydrogen peroxide as oxidant for the first time. Fast hot catalyst filtration experiment proved that the catalyst acted as a heterogeneous one. Recycling of the catalyst indicates that the catalyst can be used a number of times without losing its activity to a greater extent. The effects of reaction time and reaction temperature on the performance of the catalyst were investigated. Moreover, cobalt doped mesoporous titania with a crystalline structure and cobalt doped mesoporous titania–silica with different molar ratio were also studied. It was found that Co–TiO 2 –SiO 2 with Ti/Si molar ratio of 0.5 showed the highest activity.