Wang W C, Neoh K G, Kang E T, Lim S L, Yuan D
Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge, 119260, Singapore.
J Colloid Interface Sci. 2004 Nov 15;279(2):391-8. doi: 10.1016/j.jcis.2004.06.072.
Photo-induced reduction of gold and platinum metal salt solutions was carried out using viologen graft copolymerized on low-density polyethylene (LDPE) films and viologen-containing poly(vinylidene fluoride) (PVDF-PVBV) microporous membranes. The effects of the UV irradiation time and concentration of the metal salt solutions on the metal ion reduction process and the resultant metal deposition on the polymeric substrates were investigated. The metal-polymer composites were characterized using X-ray photoelectron spectroscopy (XPS), scanning and transmission electron microscopy (SEM and TEM), atomic force microscopy (AFM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and UV-visible absorption spectroscopy. The amount of metal uptake, the state of the metal, and the size of the metal particles were found to be strongly dependent on the UV irradiation time and the type and concentration of the metal salt solution. The microporous structure and the high viologen content of the PVDF-PVBV membrane constitute an effective matrix for metal ion reduction and preparation of metal nanoparticles.
使用接枝聚合在低密度聚乙烯（LDPE）薄膜上的紫精以及含紫精的聚偏二氟乙烯（PVDF - PVBV）微孔膜对金和铂金属盐溶液进行光致还原。研究了紫外线照射时间和金属盐溶液浓度对金属离子还原过程以及在聚合物基底上形成的金属沉积的影响。使用X射线光电子能谱（XPS）、扫描和透射电子显微镜（SEM和TEM）、原子力显微镜（AFM）、能量色散X射线光谱（EDX）、X射线衍射（XRD）以及紫外可见吸收光谱对金属 - 聚合物复合材料进行表征。发现金属吸收量、金属状态以及金属颗粒大小强烈依赖于紫外线照射时间以及金属盐溶液的类型和浓度。PVDF - PVBV膜的微孔结构和高紫精含量构成了用于金属离子还原和制备金属纳米颗粒的有效基质。
