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用层接层自组装的方法制备了过渡金属钒取代的多金属氧酸盐PMo11VO440-/聚酰胺-胺多层纳米复合膜.X射线光电子能谱(XPS)、紫外-可见光谱(UV-Vis)、循环伏安(CV)测定和分析结果表明,PMo11VO440-和聚酰胺-胺通过静电相互作用形成了纳米交替多层膜,且膜的增长均匀.复合膜的循环伏安图呈现出四对氧化还原峰(一个V的单电子和三个Mo的双电子),峰电流与扫描速率成正比,其式量电位随着pH的增加而线性负移,表明电极过程属于表面控制过程,电荷传递很快且有氢离子参与多金属氧酸盐的氧化还原反应.该方法制备的多层膜修饰电极稳定性好,对NO2-、BrO3-及H2O2具有良好的催化还原活性.
The transition metal vanadium-substituted polyoxometallate PMo11VO440- / polyamide-amine multilayer nanocomposite films were prepared by the self-assembly of the tie layer. X-ray photoelectron spectroscopy (XPS), UV-Vis ), Cyclic voltammetry (CV) measurement and analysis results show that, PMo11VO440- and polyamide-amine through the electrostatic interaction to form a nano-alternating multi-layer film, and the growth of the film uniform. The cyclic voltammogram of the composite film presents four pairs The redox peaks (one electron of one V and two electrons of three Mo), the peak current is directly proportional to the scan rate, and the type potential decreases linearly with increasing pH, indicating that the electrode process belongs to the surface control process and the charge transfer Quickly and hydrogen ions participate in the redox reaction of polyoxometalates. The multilayer modified electrode prepared by the method has good stability and good catalytic reduction activity for NO2-, BrO3- and H2O2.