Au@Ag核壳纳米粒子的合成及其催化性能研究  

Preparation of Au@Ag core-shell nanoparticles and their application for catalysis

作　　者：胡兰兰[1] 金珊霞[1] 刘自纯[1] 李文嘉[1] 刘禅[1] 刘丽娜[1] 叶勇[1] 

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2012年第1期60-63,共4页Journal of Hubei University：Natural Science

基　　金：湖北省自然科学基金(T201101)资助

摘　　要：采用柠檬酸钠法合成了Au@Ag核壳纳米粒子并对其进行表征,同时采用紫外光谱跟踪测试考察其对对硝基苯酚还原的催化性能以及影响催化还原反应速率的因素.结果表明,该核壳纳米粒子对硼氢化钠还原对硝基苯酚具有较好的催化活性,反应受催化剂用量、氧化剂性质和催化剂性质等因素的影响,带正电荷的硝基化合物比带负电荷的硝基化合物具有更高的催化活性;在一定范围内,催化剂用量越大,反应速率越大;纳米粒子的粒径越小,反应速率越大.Au@Ag core-shell nanoparticles were synthesized and characterized,In addition,their catalytic reduction of p-nitrophenol was also investigated by UV-vis spectrums,the factors that influenced the rate of catalytic reduction were discussed.The results showed that catalytic reduction of p-nitrophenol by sodium borohydride was strongly enhanced,the reducation of nitro compounds with positive charge was much easilier.The results also showed that the more the catalyst and the smaller the size of the nanoparticles,the faster the reaction performed.

关 键 词：紫外-可见吸收光谱 Au@Ag核壳 对硝基苯酚 催化还原反应 

分 类 号：O657.32[理学—分析化学]