铜网基刺叶状Au阵列的构筑及其重复催化性能  

Fabrication of copper grid-based blade-like Au array and its performance for reusable catalyst

作　　者：孙春生 王晶 刘雪锋 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《化学研究与应用》2014年第10期1563-1568,共6页Chemical Research and Application

基　　金：国家自然科学基金项目(21071065)资助;教育部基金项目(教外司留[2011]1139)资助;江苏省青蓝工程资助

摘　　要：先在NaOH-(NH4)2S2O8溶液中氧化,再高温脱水可得到表面布满柱状和花瓣状CuO的铜网,然后以H2加热还原CuO后得到表面粗糙化铜网,再与HAuCl4溶液进行置换反应,在粗糙化铜网表面形成刺叶状纳米Au的阵列,刺叶状纳米Au的平面排布密度达107片/mm2。所得刺叶状纳米Au阵列对NaBH4还原对硝基苯酚反应具有良好的重复催化活性,重复使用10次,其催化活性未见明显衰减,催化剂平均转化频率为3.22×10-3mol·gAu-1·h-1(重复10次的相对标准偏差为3.84%)。Copper grid-based blade-like Au array,for reusable catalyst,has been achieved by means of a template related proce-dure. Copper grids（CG）were reacted with NaOH-（NH4）2S2O8 solution,and then dehydrated at high temperature to get CG with rod-and flower-like CuO. Then the CuO was reduced by H2 to get roughened CGH. The blade-like Au array（CGHAu）could be ob-tained by the reaction of the roughened CGH with aqueous HAuCl4 solution. The surface density of blade-like Au of CGH Au is about 107/mm2 range. The as-prepared CGHAu could be used as a reusable catalyst for the well-known p-nitrophenol（4-NP）reduction to p-aminophenol（4-AP）with an excess amount of NaBH4. The catalyst efficiency was evaluated on the basis of turnover frequency （TOF）and recyclability. The average TOF of the catalyst was 3. 22×10-3mol·gAu-1·h-1 with a relative standard deviation of 3. 84%in 10-cycle reuse.

关 键 词：铜网基刺叶状Au阵列 可重复催化剂 转化频率 

分 类 号：O611.4[理学—无机化学] O643.36[理学—化学]