Room‐Temperature High‐Performance Trace Level Acetone Sensor Based on Polypyrrole Nanotubes

Abstract

Recently, precise detection of VOCs in particular acetone, ammonia alcohol has attracted huge attention for industrial safety, monitoring of environment and human health. In this article we have reported for a polypyrrole nanotube (PPNT)‐based chemiresistive sensor for the selective detection of trace acetone vapour at room temperature (25 °C). Polypyrrole (PPy) nanoparticles with different morphologies, viz. nanotubes, nanowire, and globular were synthesized using methyl orange (MO), cetyltrimethyl ammonium bromide (CTAB), and pure polypyrrole as the growth template. The as synthesized powders were exploited to fabricate Taguchi‐type thick‐film sensors. The synthesized powders and fabricated sensors were characterized by multiple sophisticated techniques, such as, XRD, FTIR, Raman spectroscopy, SEM, EDS, UV‐VIS spectroscopy, optical non‐contact profilometry, and current‐Voltage (I‐V) measurement. It is observed that the PPNT sensor shows the highest response to trace acetone vapour with a lower detection limit of 500 ppb at room temperature (25 °C) and quick response (∼5.4 sec) and recovery (∼73.94 sec) times. Achieved enhanced sensing behaviour can be attributed to formation of hydrogen bond between acetone and PPy. Combined with room temperature sensing, good stability, repeatability, produce sensor may find application in various sensing fields.

Conductometric Sensor Based on Electropolymerized Pyrrole-Tailed Ionic Liquids for Acetone Detection

“…Recently, a PPy nanotube-based sensor with a detection limit of 500 ppb at 25 °C toward acetone was reported. 24 On the other hand, ionic liquids (ILs) also present many interesting properties to be used in sensor design. They have negligible vapor pressure, wide electrochemical potential window, high thermal stability, and present high solubility for a broad range of gases.…”

“…Polypyrrole nanocomposite sensors containing Ag nanoparticles, CdTe, or WO 3 have also been developed for acetone detection. Recently, a PPy nanotube-based sensor with a detection limit of 500 ppb at 25 °C toward acetone was reported …”

Enhanced Triethylamine Detection at Room Temperature Using a Layered MoS2 Nanosheet-Coated PPy Nanorod: A Comprehensive Study

“…Therefore, hybridizing MoS 2 nanosheets with functional CPs has proven to be one of the most promising materials for gas-sensing applications due to enhanced electrical conductivity, better charge mobility, and long-term stability. 18,19 Herein, we successfully synthesized MsPy composites, specifically MsPy_20, MsPy_40, and MsPy_80, through the self-template method by controlled sulfidation reaction, which shows enhanced sensing properties toward TEA at room temperature. Among them, the MsPy_40 sensor exhibits the highest response toward TEA, which exhibits selective detection with a lower limit of 0.5 ppm with fast response (∼3.9 s) and recovery (∼19.6 s) at room temperature (25 °C, 43% RH).…”

“…In recent years, conducting polymers (CPs) such as polyaniline (PANI), polypyrrole (PPy), and poly­(3,4-ethylene dioxythiophene) (PEDOT) have a major role in room temperature-based gas sensing due to their flexibility and superior physicochemical properties. Therefore, hybridizing MoS 2 nanosheets with functional CPs has proven to be one of the most promising materials for gas-sensing applications due to enhanced electrical conductivity, better charge mobility, and long-term stability. , …”