Xue Changguo, Li Shiqin, Tang Yu, An Cunbin, Liu Song, Teng Yanhua
School of Material Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China.
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
ACS Omega. 2021 Apr 23;6(17):11519-11528. doi: 10.1021/acsomega.1c00645. eCollection 2021 May 4.
In this work, a sulfhydryl-functionalized azobenzene derivative (Azo) was synthesized and polyaniline/silver was modified (PANI/Ag) to make a nanocomposite (PANI/Ag/Azo). A series of characterization techniques likeHNMR, UV-vis absorption spectra, Raman spectra, FT-IR, XRD, SEM, TEM, and TGA was employed to study Azo, PANI/Ag, and PANI/Ag/Azo. Electrochemical properties were measured by cyclic voltammetry (CV) and galvanostatic charging/discharging (GCD). CV showed that UV and blue light had hardly any effect on PANI/Ag. However, with the prolonged exposure time of UV light, the maximum CV current density of PANI/Ag/Azo rose from 1.24 to 2.72 A g. Then, after 20 min of blue light irradiation, the maximum current density gradually recovered (from 2.72 to 1.26 A g). The GCD also obtained similar results. After formula calculation, the specific capacitance of PANI/Ag/Azo also presented a reversible trend under the alternating irradiation of UV light and blue light. All the results show that PANI/Ag/Azo has a good photoelectric response, and its electrochemical performance can be reversibly adjusted by light. This result provides a new design idea for developing electrode materials with real-time electrochemical properties.
在这项工作中，合成了一种巯基官能化的偶氮苯衍生物（Azo），并对聚苯胺/银（PANI/Ag）进行改性，制成纳米复合材料（PANI/Ag/Azo）。采用了一系列表征技术，如核磁共振氢谱（HNMR）、紫外可见吸收光谱、拉曼光谱、傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和热重分析（TGA）来研究Azo、PANI/Ag和PANI/Ag/Azo。通过循环伏安法（CV）和恒电流充放电（GCD）测量电化学性能。CV表明，紫外光和蓝光对PANI/Ag几乎没有任何影响。然而，随着紫外光照射时间的延长，PANI/Ag/Azo的最大CV电流密度从1.24 A g上升到2.72 A g。然后，在蓝光照射20分钟后，最大电流密度逐渐恢复（从2.72 A g降至1.26 A g）。GCD也得到了类似的结果。经过公式计算，PANI/Ag/Azo的比电容在紫外光和蓝光交替照射下也呈现出可逆趋势。所有结果表明，PANI/Ag/Azo具有良好的光电响应，其电化学性能可通过光进行可逆调节。这一结果为开发具有实时电化学性能的电极材料提供了新的设计思路。
