缺位磷钨酸盐/CdS纳米粒子电致变色膜的制备及性能研究

Fabrication and Electrochromic Performance of Lacunary Phosphotungstate/CdS Nanoparticles

通过层接层自组装技术,以缺位Dawson结构磷钨酸盐α-K10P2W17O61·20H2O、CdS纳米粒子和聚乙烯亚胺(PEI)为原料,构筑PEI/[P2W17/PEI]20和PEI/[P2W17/PEI-CdS]20复合膜,探究CdS纳米粒子的添加对复合膜电致变色性能的影响。采用紫外-可见吸收光谱、红外光谱、扫描电镜和X射线光电子能谱对复合膜进行表征,并利用紫外-可见吸收光谱和电化学工作站联机对两种复合膜的电致变色性能进行对比研究。研究表明:CdS纳米粒子复合膜PEI/[P2W17/PEI-CdS]20的光反差提高8.59%,着色效率从48.61 cm^2/C提高到了77.03 cm^2/C,循环200圈后透过率仍能保持原来状态的96.91%,具有良好的稳定性。CdS纳米粒子复合为提高缺位磷钨酸盐电致变色性能提供了新的方法。

To study the effects of the addition of CdS nanoparticles on the electrochromic properties of composite films,the PEI/[P2W17/PEI]20 and PEI/[P2W17/PEI-CdS]20 composite films constructed by lacunary phosphotungstateα-K10P2W17O61·20 H2O(P2W17),CdS nanoparticles and poly(ethylene imine)were prepared by layer-by-layer self-assembly method.The composite films were investigated via UV-Vis spectrophotometer,IR spectroscopy,scanning electron microscope and X-ray photoelectron spectroscopy.The electrochromic properties of the composite films were detected by UV-Vis spectrophotometer and electrochemical workstation.By the addition of CdS nanoparticles,the optical contrast of the PEI/[P2W17/PEI-CdS]20 composite film was increased by 8.59%,the coloring efficiency was improved to 77.03 cm^2/C from 48.61 cm^2/C,and the transmittance retained 96.91%of its original value after 200 cycles,which showed excellent stable.The CdS nanoparticles composite provides a new method to improve electrochromic properties of lacunary phosphotungstate.