Chemiresistive SO 2 sensor: graphene oxide (GO) anchored poly(3,4-ethylenedioxythiophene):poly(4styrenesulfonate) (PEDOT
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Chemiresistive SO2 sensor: graphene oxide (GO) anchored poly(3,4‑eth ylenedioxythiophene):poly(4styrenesulfonate) (PEDOT:PSS) Pasha W. Sayyad1 · Shahebaz S. Khan1 · Nikesh N. Ingle1 · Gajanan A. Bodkhe1 · Theeazen Al‑Gahouari1 · Manasi M. Mahadik1 · Sumedh M. Shirsat2 · Mahendra D. Shirsat1 Received: 20 July 2020 / Accepted: 3 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This report deals with the synthesis of poly(3,4-ethylenedioxythiophene):poly(4styrenesulfonate)/graphene oxide (PEDOT:PSS/GO) composites by solution processing method and exploration of the same for chemiresistive-type SO2 gas sensing. The PEDOT:PSS polymer is used as a conducting layer due to high stability in air and GO due to the high surfaceto-volume ratio. The PEDOT:PSS/GO was characterized by using an X-ray diffractometer, atomic force microscopy (AFM), and Raman spectroscopy. The sensor channel was fabricated by drop-casting PEDOT:PSS/GO on the sub-mm gap of copper a electrode on plastic substrate, which forms two-electrode devices as a sensor. The PEDOT:PSS/GO sensor platform manifests highly selective, sensitive, rapid, and reversible responses for the detection of 0.5–40 ppm S O2 gas. Moreover, it exhibits fast response and recovery time (81 s and 92 s), with excellent selectivity and stability at room temperature. Keywords PEDOT:PSS · Graphene oxide (GO) · Gas sensing · SO2 gas · Sensing mechanism
1 Introduction Rapid growth in industrialization and modernization over the last couple of decades has resulted significantly in the environmental pollution. Mainly, the sulfur dioxide SO2 is considered to be a major environmental pollutant [1, 2]. The major sources of highest concentrations of sulfur dioxide (SO2) in the environment are found around petrol refineries, chemical manufacturing industries, mineral ore processing plants, and power stations [3–6]. Sulfur dioxide ( SO2) is a Pasha W. Sayyad and Shahebaz S. Khan authors have contributed equally. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00339-020-04053-9) contains supplementary material, which is available to authorized users. * Mahendra D. Shirsat [email protected] 1
RUSA Centre for Advanced Sensor Technology, Department of Physics, Dr. Babasaheb Ambedkar, Marathwada University, Aurangabad, Maharashtra 431 004, India
Department of Electronics and Telecommunication Engineering, Jawaharlal Nehru Engineering College, Aurangabad, Maharashtra 431 001, India
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highly irritating gas, and it causes adverse effects on human health, and hence, Occupational Safety and Health Administration (OSHA), USA, has recommended its permissible exposure limit (PEL) level to 5 ppm [7]. It also has adverse effects on the respiratory system, intensely irritating to the eyes and throat, etc.[8]. Environmental Protection Agency (EPA) has determined that even short-term exposure to high levels of SO2 can have a detrimental effect on the breathing function of the human body [9]. Therefore,
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