Title: Preparation of Fe_2(MoO_4)_3 Ultrafine Particle Catalyst By Sol-gel Method and Microwave Irradiation
Abstract: Fe 2(MoO 4) 3 ultrafine particle catalyst was prepared from gel precursor on heating in microwave oven. The precursor was obtained from Fe 2(NO 3) 3 and (NH 4) 6Mo 7O 24 in citric acid. The influences of preparation conditions on the crystal phase and dimension of the particles were studied by using XRD, DTA TG, IR and BET surface area measurement methods. The activity and selectivity of the Fe 2(MoO 4) 3 catalyst for the selective oxidation of toluene to benzaldehyde was investigated. The results show that appropriate condition is citric acid/(Fe+Mo) molar ratio=0.4 and pH=1.0 for preparing Fe 2(MoO 4) 3 ultrafine particle. The BET surface area of the sample treated in microwave oven is 36.4m 2/g, the size is about 35nm. The catalytic activity of the sample prepared by sol gel method is higher than that prepared by precipitation method on the selective oxidation of toluene to benzaldehyde.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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