A Sulfhydryl Azobenzene-Modified Polyaniline/Silver Electrode and Its Photoswitching Electrochemical Performance

Abstract

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 like 1 HNMR, 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 –1 . Then, after 20 min of blue light irradiation, the maximum current density gradually recovered (from 2.72 to 1.26 A g –1 ). 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.

Development and application of a CNT–Ag–Cu–Al/PS-based paper electrode for detecting diverse analytes in complex matrices

“…In addition, we found that there was an excellent correlation between the oxidation peak potential and pH, and the slope of them was close to the value developed from the Nernst equation (−0.59 mV pH −1 ), indicating an equal amount of electrons and protons were involved in the oxidation process of HQ. 20…”

Electroactive Biomaterials Regulate the Electrophysiological Microenvironment to Promote Bone and Cartilage Tissue Regeneration

“…The principle of surface modification of PANi is to introduce functional groups onto its surface and optimize the relevant functions through covalent bonding. [116] Hu et al [117] enhanced the biocompatibility of PANi by polymerizing PANi monomers with chitosan as a steric stabilizer, resulting in a surface-functionalized PANi/chitosan nanocomposite material. Their research revealed the existence of interactions between PANi and chitosan; as PANi content in the composite material increased, the electrical conductivity also increased, reaching a maximum of 0.25 S cm −1 .…”

“…The principle of surface modification of PANi is to introduce functional groups onto its surface and optimize the relevant functions through covalent bonding. [ 116 ] Hu et al. [ 117 ] enhanced the biocompatibility of PANi by polymerizing PANi monomers with chitosan as a steric stabilizer, resulting in a surface‐functionalized PANi/chitosan nanocomposite material.…”

In Situ Generation of Ultrathin MoS2 Nanosheets in Carbon Matrix for High Energy Density Photo‐Responsive Supercapacitors

“…[ 11 ] The stimuli‐responsive behavior is mainly attributed to deformable electrolytes and rationally‐designed device structures. [ 12 ] Some conjugated polymers, [ 13 ] inorganic semiconductors, [ 14 ] and metal/conductive polymer composites [ 15 ] exhibit light‐triggered capacitance evolution, but there are also problems such as low capacitance, slow response, and limited sensitivity. Besides, light‐triggered capacitance evolution has been achieved by utilizing the photo‐thermal effect of graphene and carbon nanotubes.…”