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采用声化学水热法制备了V2O5纳米带,并将十六烷基膦酸负载在它和块状V2O5表面上,以修饰催化剂表面,通过调变催化剂中晶格氧活动性以及表面酸碱性来控制其催化甲苯氧化产物的选择性.结果表明,V2O5纳米带具有较强的晶格氧活动性,与普通块状V2O5相比,甲苯转化率更高,但苯甲醛和苯甲酸的总选择性下降.经过表面修饰后,V2O5纳米带的催化活性以及苯甲醛、苯甲酸总选择性增加;而块状V2O5上苯甲醛、苯甲酸总选择性更高,但催化活性显著下降.
V2O5 nanobelts were prepared by sonochemical hydrothermal method, and cetylphosphonic acid was supported on it and massive V2O5 surface to modify the surface of the catalyst. By adjusting the activity of lattice oxygen and the surface acid-basicity To control the selectivity of toluene oxidation products.The results show that the V2O5 nanobelts with strong lattice oxygen activity, compared with the ordinary bulk V2O5 toluene conversion rate higher, but the total choice of benzaldehyde and benzoic acid The catalytic activity and the total selectivity to benzaldehyde and benzoic acid in the V2O5 nanobelts increased after the surface modification, while the benzophenoxy and benzoic acids in the bulk V2O5 had higher total selectivity and lower catalytic activity.