Hierarchical gold microspheres catalyst: Simultaneous synthesis and immobilization

✍ Scribed by Youyi Xia; Hongping Xiao

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 603 KB
• Volume: 331
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/j.molcata.2010.07.013

✦ Synopsis

Without any other additives or additional energy, gold quasi microspheres with novel hierarchical structure have been successfully prepared and integrated simultaneously with a conducting polyaniline/polyacrylonitrile blend film via the in situ reduction of AuCl 4

-on the film surface. The morphology and structure of the as-prepared gold microspheres are characterized, and its application as catalyst is also investigated. By controlling the concentration of HAuCl 4 and polyaniline content (or conductivity) of polyaniline/polyacrylonitrile blend films, the amount and size of gold microspheres can be effectively adjusted. It is suggested that the polyaniline chains of the blend films play both reducing and structuredirecting roles during the formation of Au microspheres with hierarchical structure. The catalytic studies show that the hierarchical gold microspheres give highly catalytic activity when taking the reduction of p-nitrophenol as a mode reaction.