Solitary surfactant assisted morphology dependent chemiresistive polyaniline sensors for room temperature monitoring of low parts per million sulfur dioxide

Chaudhary, Vishal; Kaur, Amarjeet

doi:10.1002/pi.4944

Cited by 38 publications

(29 citation statements)

References 57 publications

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“…The presence of trace SO2 and H2S gas can inflict serious damage to the human body, leading to an increase in the incidence of cancer, such as cardiovascular disease and lung cancer. 1,2 Thus, the maximum allowable concentration in the air is strictly limited in each country. For example, in China, the maximum allowable average maximum concentration of SO2 per hour in indoor air is 0.5 mg/m 3 (∼0.2 ppm) (GB/T 17097-1997), whereas the minimum allowable concentration of H2S in air is 10 mg/m 3 (∼7 ppm) (GBZ 2 [1].…”

Section: Introductionmentioning

confidence: 99%

Optical-Electricity Gas-Sensing Property Detection of SDBS-WO3 Film at Room Temperature

et al. 2018

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In this work, sodium dodecyl benzene sulfonate (SDBS) was used as a dispersing agent; a WO3 nanoparticle suspension was used as a sensing material. The SDBS-WO3 thin film/Sn-doped glass optical waveguide sensor element was prepared by spin coating. The sensing material was characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and field-emission scanning electron microscopy (FESEM). The gas-sensing characteristics of the fabricated sensors were studied at room temperature for various gases. The experimental results indicate that the sensor exhibited a high selective response toward SO2 and H2S and a low detection limit of 10 ppb to SO2 and H2S. The response/recovery times for SO2 and H2S were 2/23 and 2/18 s. However, during an electrochemical gas-sensing performance test of the SDBS-WO3 film at room temperature, the results indicated that the trend of the variation in resistance was consistent with the variation in the output light.

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Section: Introductionmentioning

confidence: 99%

Optical-Electricity Gas-Sensing Property Detection of SDBS-WO3 Film at Room Temperature

et al. 2018

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“…The exposure limit for sulfur oxides is 5 ppm, beyond which they can adversely affect the human respiratory and nervous systems, and can cause permanent pulmonary impairment, skin infections and in worst cases death due to lung failure . The commercially available sensors for detection of SO x include optical sensors, potentiometric sensors, chemiresistive‐type sensors, acoustic sensors and transistors . The chemiresistors are the most cost effective, energy saving and environmental friendly types of sensors amongst all the sensing technologies .…”

Section: Introductionmentioning

confidence: 99%

“…The commercially available sensors for detection of SO x include optical sensors, potentiometric sensors, chemiresistive‐type sensors, acoustic sensors and transistors . The chemiresistors are the most cost effective, energy saving and environmental friendly types of sensors amongst all the sensing technologies . The materials used for fabrication of sensing layers in chemiresistors generally comprise metal oxides, carbon nanostructures and conducting polymers (CPs) .…”

Section: Introductionmentioning

confidence: 99%

“…The chemiresistors are the most cost effective, energy saving and environmental friendly types of sensors amongst all the sensing technologies . The materials used for fabrication of sensing layers in chemiresistors generally comprise metal oxides, carbon nanostructures and conducting polymers (CPs) . CP‐based chemiresistors are the most researched due to their advantages over other types, such as room temperature applicability, ease of synthesis and processing, low fabrication cost, range of commercially available varieties, tuneable conductivities, environmental and user friendliness, simple electronics, energy saving and longer lifespan of devices …”

Section: Introductionmentioning

confidence: 99%

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Effect of charge carrier transport on sulfur dioxide monitoring performance of highly porous polyaniline nanofibres

2017

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Polyaniline nanofibres (NFs) with controlled diameters were synthesized using a template-free method, with ammonium peroxidisulfate (APS) or ferric chloride (FeCl 3 ) as oxidants. Porosity studies reveal that NFs prepared with FeCl 3 possess higher effective surface area and larger pore volume compared to NFs prepared with APS. The FeCl 3 -assisted NFs show around twofold enhanced sensing response (ca 4.5%) towards 5 ppm of SO 2 at room temperature compared to APS-assisted NFs (ca 2%). The enhancement can be attributed to the lower diameter, higher effective surface area and larger porosity of FeCl 3 -assisted NFs. To further explain this enhanced sensing response, the conduction mechanism was studied. NFs possessing a smaller diameter (ca 10 nm) are found to follow the one-dimensional variable range hopping (VRH) model, whereas NFs with larger diameter (ca 100 nm) follow the conventional three-dimensional VRH model. This can be due to the restriction of charge carrier transport into only one direction due to quantum size effects. Furthermore, the calculated Mott parameters suggest that the NFs prepared using FeCl 3 provide a better pathway for charge transport of charge carriers as compared to NFs prepared using APS in terms of shorter hopping distance, lower activation energy and lower hopping energy, and weaker localization of charge carriers.

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“…Conducting polymer (CP) is a family of versatile organic materials to serve as the good candidate as the sensing materials, providing high surface areas and tunable functionality [5,6]. With our group’s recent interests in the exploring the use of the conducting polymer in the sensor development with enhanced sensitivity and selectivity [7–9], the ring-substituted polyaniline and polyaniline itself were selected to serve as the coating material, facilitating the sulfur dioxide sensing [10–12]. Several educated considerations contribute to this choice.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the ring-substituted polyanilines and their application for the detection and adsorption of sulfur dioxide

Tian

Zeng

2017

Sensors and Actuators B: Chemical

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It has been demonstrated in this study that the substituents on the monomer aniline benzene ring are able to introduce the significant differences to the resulting polyaniline’s collective properties. We systematically evaluated the structural perturbation effects of two substituents (methyl and methoxy) of aniline monomer through the electrochemical method. Our results showed that the methoxy group induces the less structural perturbation than the methyl counterpart, because of its partial double bond restriction. The morphologies are different for the polyaniline and the ring-substituted polyanilines, in which substituted polyanilines feature the larger porosities with the addition of these side groups. The influential effects of the methoxy side group have been further illustrated and amplified by its superior sensing performance towards the environmentally-significant sulfur dioxide gas, evaluated through the construction of the quartz crystal microbalance (QCM)-based gas sensor with these polyaniline materials. The as-constructed gas sensor’s sensitivity, selectivity and stability in terms of its SO2 responses have been evaluated in details. The methoxy-substituted polyaniline was tested to show the unique gas sensing properties for the sulfur dioxide at the low concentrations (50–250 ppm) and function as the adsorbing material at the high concentrations (500–1250 ppm). Thus it can be used both as sensing material as well as a novel filter and/or storage reservoir for the removal of sulfur dioxide pollutant from the environments.

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Solitary surfactant assisted morphology dependent chemiresistive polyaniline sensors for room temperature monitoring of low parts per million sulfur dioxide

Cited by 38 publications

References 57 publications

Optical-Electricity Gas-Sensing Property Detection of SDBS-WO3 Film at Room Temperature

Optical-Electricity Gas-Sensing Property Detection of SDBS-WO3 Film at Room Temperature

Effect of charge carrier transport on sulfur dioxide monitoring performance of highly porous polyaniline nanofibres

Investigation into the ring-substituted polyanilines and their application for the detection and adsorption of sulfur dioxide

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