磷钼酸作为光催化还原剂制备纳米金溶胶

Synthesis of Gold Nanoparticles by Using Phosphododecamolybdates as Photocatalyst

选择二甲基甲酰胺(DMF)为电子牺牲剂,以磷钼杂多酸作为光催化还原剂制备了纳米金溶胶,由于DMF与磷钼杂多阴离子间的电荷转移作用,导致钼系杂多酸可成为制备纳米金溶胶的光催化还原剂。实验结果表明,紫外光照作用及光照时间、DMF用量等是影响纳米金的形成和形貌的主要因素,选择适宜的合成条件可以得到粒径均匀、分散性好的纳米金溶胶。

A novel and facile method was proposed to synthesize gold nanoparticles directly from aqueous solutions, by use of Keggin-structure phosphododecamolybdates （PMol2） to serve as photocatalyst and stabilizers with the aid of dimethyl formamide （DMF）. DMF was acted as e-donor and forms a charge-transfer complex with PMol2. The yield and morphology of gold nanoparticles were affected by the time of UV irradiation and the amount of DMF. It is useful to enhance optical and electrocatalytical responses of functionalized gold nanoparticle surfaces.