液—液界面反应制备纳米自组装多孔金膜

The preparation of self-assembled nano-porous gold film by liquid-liquid interfacial reaction

采用液—液界面反应成功制备了纳米自组装多孔金膜,研究了不同的还原剂、不同的水相辅助试剂对界面反应生成金膜的结构形貌影响。结果表明:在抗坏血酸、硫酸羟胺和硼氢化钠三种还原剂中,抗坏血酸制备的纳米Au颗粒粒度和形貌最好;添加辅助试剂聚乙烯醇和甲基纤维素,提高水相黏度后,纳米Au颗粒自组装生成多孔金膜。其中以甲基纤维素作为水相辅助试剂效果更好,可制备出由Au颗粒自组装而成的排列紧密、质地均匀的多孔金膜。用扫描电子显微镜、X射线衍射分析仪和紫外可见光谱分析等手段对该膜进行表征。

Self-assembled nano-porous gold film was successfully prepared by liquid-liquid interfacial reaction. The effects of reducing agents and water phase on the morphology of gold film preparing by interfacial reaction were researched. It is observed that the particle size and morphology of the Au nanoparticles are better when using L-ascorbic acid as a reducing agent then hydroxylamine sulfate or sodium borohydride. Adding auxiliary agents like polyvinyl alcohol and methyl cellulose to increase the viscosity of the water phase can prepare self-assembled nano-porous gold film. Especially using methyl cellulose as the water phase auxiliary agent can prepare the porous gold film which is self-assembled by Au particles arranged densely and uniform in texture. The gold film was analysed by SEM,X-ray diffraction,UV-visible spectroscopy and other means.