Hierarchical gold microspheres catalyst: Simultaneous synthesis and immobilization

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 AuCl4− 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 HAuCl4 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 structure-directing 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.

Graphical abstractHierarchical gold quasi microspheres, which give high catalytic activity, have been synthesized and immobilized simultaneously on the surface of conducting polyaniline/polyacrylonitrile blend film via in situ reduction of AuCl4−.Figure optionsDownload full-size imageDownload high-quality image (139 K)Download as PowerPoint slide