γ-MnO2 octahedral molecular sieve: Preparation, characterization, and catalytic activity in the atmospheric oxidation of toluene

A synthesized γ-MnO2 octahedral molecular sieve was characterized and used to catalyze solvent-free atmospheric oxidation of toluene with molecular oxygen. The γ-MnO2 showed excellent catalytic activity and good selectivity under the mild atmospheric reflux system at a low temperature (110 °C). Under optimized conditions, a 47.8% conversion of toluene, along with 57% selectivity of benzoic acid and 15% of benzaldehyde were obtained. The effects of reaction time, amount of catalyst and initiator, and the reusability of the catalyst were investigated.

Atmospheric oxidation of toluene with molecular oxygen has been reported for the first time using easy synthesized γ-MnO2 octahedral molecular sieve as the catalyst. Under optimized conditions, a 47.8% conversion of toluene, along with 57% selectivity of benzoic acid and 15% of benzaldehyde were obtained. The effects of reaction time, amount of catalyst and initiator, and the reusability of the catalyst were investigated.Figure optionsDownload as PowerPoint slide