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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (18): 2095-2101. 上一篇    下一篇

研究论文

层层自组装聚烯丙胺盐酸盐/Pd纳米复合薄膜的制备及其电催化特性

张 莉* 王 聪 祝丽娜   

  1. (自旋电子与纳米材料安徽省重点实验室培育基地 宿州学院化学与生命科学系 宿州 234000)
  • 投稿日期:2008-10-05 修回日期:2009-03-04 发布日期:2009-12-31
  • 通讯作者: 张莉

Poly(allylamine hydrochloride) (PAH)/Pd Nanocomposite Thin Films by Layer-by-layer Assembly Technique and Their Electrocatalytic Properties

Zhang, Li* Wang, Cong Zhu, Lina   

  1. (Anhui Key Laboratory of Spin Electron and Nanomaterials (Cultivating Base), Department of Chemistry & Biology, Suzhou University, Suzhou 234000)
  • Received:2008-10-05 Revised:2009-03-04 Published:2009-12-31
  • Contact: Zhang, Li

被引次数

32

利用层层静电自组装技术将聚烯丙胺盐酸盐(PAH)和四氯合钯酸根离子( )交替沉积在基底上, 然后用硼氢化钠还原, 构筑了含钯纳米粒子的PAH/Pd纳米复合薄膜. 通过紫外-可见吸收光谱(UV-Vis)、扫描电子显微镜(FESEM), X射线光电子能谱(XPS)和循环伏安(CV)等手段对复合膜的组装、成分、微结构、表面形貌和光学性能进行了测试分析. FESEM图形显示膜表面有一定的粗糙度, 膜上生成了粒径在50～100 nm 范围的钯纳米粒子; UV-Vis结果显示多层膜在特征吸收峰处的吸光度数值随膜双层数增加逐渐增大, 呈良好的线性关系, 表明多层膜是均匀组装的; XPS结果证实了复合膜上有Pd生成, CV结果说明复合薄膜对尿酸的氧化具有较好的电催化活性, 有望用于电化学传感器.

关键词: 聚烯丙胺盐酸盐/Pd纳米复合薄膜, 层层自组装, 多层膜

Nanocomposite thin films containing Pd nanoparticles were formed by alternating adsorption of poly(allylamine hydrochloride) and using a layer-by-layer self-assembly technique and subsequent postdeposition reduction of the ions by sodium borohydride (NaBH4). The composition, structure, and properties of the composite films were characterized by ultraviolet-visible spectroscopy (UV-Vis), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). FESEM images indicate that the composite film has a rough surface and the size of Pd nanoparticles is in the range of 50～100 nm. The UV-Vis characteristic absorbances of PAH and Pd increase almost linearly with the number of bilayers, which suggests that the deposition process be regular and highly reproducible from layer to layer. XPS result confirms the formation of Pd nanoparticles in the films. The multilayer films exhibit good electrocatalytic activity for the oxidation of uric acid, which may be used in electrochemical biosensors in future.

Key words: poly(allylamine hydrochloride)/Pd nanocomposite thin film, layer-by-layer self-assembly, multilayer film