Electroconductive Polyaniline–Ag-ZnO Green Nanocomposite Material

Abstract

Metal-conducting polyaniline (PANI)-based nanocomposite materials have attracted attention in various applications due to their synergism of electrical, mechanical, and optical properties of the initial components. Herein, metal-PANI nanocomposites, including silver nanoparticle-polyaniline (AgNP-PANI), zinc oxide nanoparticle-polyaniline (ZnONP-PANI), and silver-zinc oxide nanoparticle-polyaniline (Ag–ZnONP-PANI), were prepared using the two processes. Nanocomposite-based electrode platforms were prepared by depositing AgNPs, ZnONPs, or Ag–ZnONPs on a PANI modified glass carbon electrode (GCE) in the presence of 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide/N-Hydroxysuccinimide (EDC/NHS, 1:2) as coupling agents. The incorporation of AgNPs, ZnONPs, and Ag–ZnONPs onto PANI was confirmed by UV-Vis spectrophotometry, which showed five absorbance bands at 216 nm, 412 nm, 464 nm, 550 nm, and 831 nm (i.e., transition of π-π*, π-polaron band transition, polaron-π* electronic transition, and AgNPs). The FTIR characteristic signatures of the nanocomposite materials exhibited stretching arising from C–H aromatic, C–O, and C–N stretching mode for benzenoid rings, and =C–H plane bending vibration formed during protonation. The CV voltammograms of the nanocomposite materials showed a quasi-reversible behavior with increased redox current response. Notably, AgNP–PANI–GCE electrode showed the highest conductivity, which was attributed the high conductivity of silver. The increase in peak currents exhibited by the composites shows that AgNPs and ZnONPs improve the electrical properties of PANI, and they could be potential candidates for electrochemical applications.

Electroconductive Green Metal‐polyaniline Nanocomposites: Synthesis and Application in Sensors

“…On the other hand, PANI is deposited on an electrode followed by drop casting of MNPs [106]. For example in our previous work [107] we deposited PANI on a glassy carbon electrode (GCE) by electropolymerization of 0.1 M aniline solution in 1 M HCl and a voltammetric sweep between −0.2 and +1.2 V/SCE at 50 mV.s −1 for 20 cycles. The AgNPs were adsorbed on o the PANI by drop‐casting 10 μL of 10 mM1‐Ethyl‐3‐(3‐dimethylaminopropyl) carbodiimide (EDC) and 10 μL of 20 mM N‐hydroxysuccinimide (NHS) and subsequent 10 μL of AgNPs solution.…”

“…On the other hand, PANI is deposited on an electrode followed by drop casting of MNPs [106]. For example in our previous work [107] we deposited PANI on a glassy carbon electrode (GCE) by electropolymerization of 0.1 M aniline solution in 1 M HCl and a voltammetric sweep between À 0. Radhapyari and Khan, 2015 [109] used a different approach where the Au/PANI nanocomposite was electrodeposited on an Indium tin oxide electrode by use of a three electrode electrochemical cell in a mixture of aniline, hydrochloric acid and gold nanoparticles (AuNPs) at a scan rate of 20 mV.s À 1 from À 2.0 to + 1.1 V [109].…”