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催化学报  2013 

表面修饰的钒氧化物纳米带上甲苯选择氧化反应

DOI: 10.1016/S1872-2067(12)60619-6, PP. 1297-1302

Keywords: 五氧化二钒纳米带,选择氧化,甲苯,十六烷基膦酸,表面修饰

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Abstract:

?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.

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