Ag/rGO纳米粒子的合成及其催化还原对硝基苯酚  

Synthesis of Ag/rGO Nanohybrid and Its Catalytic Activity for the Reduction of 4-nitrophenol

作　　者：陈瑞芬[1] 刘为凯[1] 李双芝[1] 张瑞[1] 刘丽君[1] 

机构地区：[1]武汉纺织大学化学与化工学院,湖北武汉430200

出　　处：《广州化工》2016年第5期46-49,共4页GuangZhou Chemical Industry

基　　金：武汉纺织大学创新计划项目(No:153033)

摘　　要：采用液相共还原法在没有表面活性剂条件下原位制备Ag/rGO纳米催化材料,并用XRD、EDX、FTIR、Raman、SEM和TEM对所得产物进行了详细表征。结果表明:氧化石墨烯和银离子同时被还原,直径约为5nm的银纳米粒子均匀负载在石墨烯片层上。所制备的Ag/rGO纳米催化剂对硼氢化钠还原对硝基苯酚(4-NP)具有明显的催化活性;当Ag负载量(质量分数)为10%时,该反应在室温下的反应速率常数可达到0.332min-1,表观活化能为34.4kJ·mol-1。该Ag/rGO纳米复合粒子有望成为还原对硝基苯酚的工业催化剂。In this work,Ag / rGO nanohybrids were synthesized via a solution- phase surfactant- free reduction of graphite oxide and silver ions. The resultant Ag / rGO nanohybrids were characterized by XRD,EDX,FT- IR,Raman,SEM and TEM,respectively. The results showed the graphite oxide and silver ions had been reduced simultaneously. The Ag nanoparticles with sizes of 5 nm were uniformly deposited on the reduced graphite oxide nanosheets and had no obvious aggregation. Such nanohybrids exhibited a promising catalytic activity towards the reduction of 4- nitrophenol by sodium borohydride and showed a high rate constants of 0. 332 min- 1when Ag had a 10wt% loading. The activation energy was estimated to be 34. 4 k J · mol- 1based on the arrhenius equation. The resulting Ag / rGO nanoparticles have potential application in the industrial catalytic reduction of 4- nitrophenol.

关 键 词：银 石墨烯 纳米催化剂 对硝基苯酚 催化还原 

分 类 号：O643.3[理学—物理化学]