High Performance of Carbon Monoxide Gas Sensor Based on a Novel PEDOT:PSS/PPA Nanocomposite

Abstract

In this work, the carbon monoxide (CO) detection property of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)/poly( p -anisidine) (PEDOT:PSS/PPA) nanocomposite was systematically investigated at room temperature. The PEDOT:PSS/PPA nanocomposite was synthesized by the cost-effective “in situ chemical oxidation polymerization” technique. The electric, optical, spectroscopic, and structural properties of the as-prepared nanomaterials were analyzed with I – V , UV–vis, Raman, Fourier transform infrared (FTIR), and X-ray diffraction (XRD) spectroscopies. Topological investigations of materials were conducted by atomic force microscopy (AFM). The gas-sensing performance of the PEDOT:PSS/PPA and PEDOT:PSS nanocomposites toward CO gas in the concentration range of 50–300 ppm at room temperature was explored, and their performances were compared. The PEDOT:PSS/PPA sensor shows a perfectly linear response to different concentrations (50–300 ppm) of CO gas ( R 2 = 0.9885), and the response time and recovery time of the CO gas sensor (100 ppm) can be about 58 and 61 s, respectively, showing high sensitivity to CO gas and rapid response recovery with outstanding stability. Thus, the PEDOT:PSS/PPA-based sensors, with their impressive sensing performance, may give assurance for future high-performance CO-sensing applications.

NASICON-type Na3Fe2(PO4)3 material for an excellent room temperature CO sensor

“…The linear I-V curve indicated that the current conduction is mainly enforced by the bulk sensing material instead of Schottky contacts. 39,40 Different gases have different response characteristics towards a particular material. First, we observed the influence of various gases (CO, C 2 H 5 OH, SO 2 , NO 2 , H 2 S, NH 3 and CO 2 ) on the gas sensing performance of the NFP sensor in prospect of variation in electrical resistance at room temperature ( 27 1C).…”

Tuning the phase separation of PEDOT:PSS affords efficient lead-free perovskite solar cells

“…15,23 To further analyse the reaction mechanism of AC within PEDOT:PSS, we acquired Fourier transform infrared (FTIR) spectra of the films. The band at about 833 cm −1 , attributed to the C–H group on the benzene ring, 24 exhibited a positive shift of 5 cm −1 , while that at about 1528 cm −1 from the sulfonate group of PSS 25 showed a negative shift of 12 cm −1 , upon AC modification (Fig. 1g–h).…”

Ultrasensitive Carbon Monoxide Gas Sensor at Room Temperature Using Fluorine-Graphdiyne

“…Conducting polymers and 2D carbon materials are gaining attention as CO gas sensor elements due to their high conductivity, larger surface area, and unique sensing mechanisms involving “chemical doping” or “charge transfer”. These properties enable operation at low and room temperatures, making them advantageous. ,,, Despite these benefits, most studied CO sensors using these materials, including commercial models like MQ-7B, MQ-9B, MP-7, MP-9, and GM-702B from Winsen, remain at the ppm level. The lamellar structure of 2D carbon-based materials like graphene allows direct interaction with the target gas, affecting CO sensor sensitivity through gas absorption and charge transfer .…”