低维氧化镍/聚苯胺核壳纳米结构的控制生长与电致变色性能研究

Controlled Growth and Electrochromic Properties of Low Dimensional Nickel Oxide/polyaniline Core-Shell Nanostructures

氧化镍和聚苯胺是典型的无机/有机电致变色材料,各有其优缺点。如果将两种材料相结合,可得到电致变色性能更加优良的NiO/PANI复合材料。本文通过水热法与电聚合相结合的方法制备了氧化镍(NiO)纳米线/聚苯胺(PANI)与氧化镍纳米片/聚苯胺核壳纳米结构。通过扫描电子显微镜、拉曼光谱和X射线光电子能谱和电化学测量装置研究了纳米复合结构的形貌、结构、成分和电致变色性能。研究成果显示,复合后NiO/PANI纳米线核壳结构在可见光与近红外区域的电致变色性能都获得了显著增强。而NiO/PANI纳米片核壳结构在可见光区域内电致变色性能有所减弱,但是在近红外区域内的光学对比度有显著增强。本工作将为研究新型低维无机/有机纳米结构电致变色材料与器件提供有益的参考。

Nickel oxide and polyaniline are typical inorganic/organic electrochromic materials,each with its advantages and disadvantages.If the two materials are combined,a Ni O/PANI composite with better electrochromic properties can be obtained.In this paper,nickel oxide(Ni O)nanowires/polyaniline(PANI)and the nickel oxide nanosheet/polyaniline core-shell nanostructures were prepared by hydrothermal method and electropolymerization.By scanning electron microscope,Raman spectroscopy,X-ray photoelectron spectroscopy,and electrochemical measurement device,the morphology,structure,composition,and electrochromic properties of the nanocomposite structure were studied.The results show that the electrochromic properties of the composite Ni O/PANI nanowire core-shell structures are significantly enhanced in both visible and near-infrared regions.The electrochromic performance of the Ni O/PANI nanosheet core-shell structure is weakened in the visible light region,but the optical contrast in the near-infrared region is significantly enhanced.This work will provide a useful reference for the research of new low-dimensional inorganic/organic nanostructured electrochromic materials and devices.