An electrochromic composite film of Preyssler-type phosphotungstate decorated by AuNPs

详细信息    查看全文

• 作者：Li Ning ^{ningli.candy@163.com} ; Wenjie Zhang ^{ZWj_329@163.com} ; Hong Yan ^{yanhong204821@yahoo.com.cn} ; Haijun Pang ^{hjpang@foxmail.com} ; Huiyuan Ma ; ^{mahy017@163.com} ; Yan Yu ^{zglnasyy@163.com}
• 关键词：Phosphotungstate ; AuNPs ; LBL ; Electrochromic ; P5W30
• 刊名：Journal of Colloid and Interface Science
• 出版年：2013
• 出版时间：1 August, 2013
• 年：2013
• 卷：403
• 期：Complete
• 页码：91-98
• 全文大小：1838 K

文摘

A multilayer composite film containing Preyssler-type phosphotungstate K_12.5Na_l.5[NaP₅W₃₀O₁₁₀]¡¤l5H₂O (P₅W₃₀) and Au particles (AuNPs) was fabricated by layer-by-layer assembly technology (LBL). The {[PEI/PSS-AuNPs/PEI/P₅W₃₀]_n} composite film was characterized by scanning electronic microscopic (SEM), UV-vis spectroscopy, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and cyclic voltammetry (CV) measurements. The electrochemical behavior of the films with and without AuNPs was investigated by cyclic voltammetry and electrochemical impedance spectra, and the composite film showed an enhanced electron transfer rate. The 6 bilayer AuNPs-free film performed color switching from transparent to blue, optical contrast of 10.4 % , and an coloration efficiency of 6.99 cm² C^?1 at 600 nm. The 6 bilayer composite film displayed enhanced electrochromic performance with the color switching from claret-red to deeper purple, optical contrast of 27.3 % and coloration efficiency of 18.52 cm² C^?1 at 550 nm due to the presence of AuNPs. The contribution of AuNPs gives valuable information for exploring new electrochromic materials.