Mild oxidation of bulky organic compounds with hydrogen peroxide over mesoporous TiO2-SiO2 xerogels prepared by non-hydrolytic sol-gel

作者：Cojocariu Ana Mihaela; Mutin P Hubert^*; Dumitriu Emil; Fajula Francois; Vioux Andre; Hulea Vasile

来源：Applied Catalysis B: Environmental , 2010, 97(3-4): 407-413.

DOI：10.1016/j.apcatb.2010.04.027

• Non-hydrolytic sol-gel
• Anthracene
• Cyclooctene
• Styrene
• alpha-Naphtol
• Mild oxidation
• H2O2

The oxidation of bulky organic compounds with aqueous H2O2 over a TiO2-SiO2 xerogel catalyst prepared by a simple non-hydrolytic sol-gel route is described for the first time. Anthracene, cyclooctene, styrene, alpha-naphtol, diphenyl sulfide, dibenzothiophene and 4,6-dimethyl-dibenzothiophene were oxidized with high activity, selectivity and H2O2 efficiency at moderate temperatures (40-60 degrees C). Moreover, a similar catalytic behavior was observed when tert-butyl hydroperoxide (TBHP) was used as an oxidizing agent. These excellent catalytic performances were ascribed to the unique texture of the catalyst(specific surface area 1200 m(2) g(-1), pore volume 2.4 cm(3) g(-1), average pore diameter 15 nm) and to the stability of Ti sites after exposure to aqueous H2O2 or TBHP.

• 出版日期2010-6-18