Affiliation:
1. Department of Polymer Science and Technology University of Calcutta 92, Acharya Prafulla Chandra Road Kolkata 700009 India
2. Functional Materials and Device Division CSIR-Central Glass and Ceramic Research Institute 196, Raja S. C. Mullick Road Kolkata 700032 India
Abstract
AbstractRecently, 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.
Subject
Materials Chemistry,Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Biomaterials