H2S sensing using in situ photo-polymerized polyaniline–silver nanocomposite films on flexible substrates

Mekki, Ahmed; Joshi, Nirav; Singh, Ajay; Salmi, Zakaria; Jha, P.; Decorse, Philippe; Lau-Truong, Stéphanie; Mahmoud, Rachid; Chehimi, Mohamed M.; Aswal, D. K.; Gupta, S. K.

doi:10.1016/j.orgel.2013.10.012

Cited by 101 publications

(48 citation statements)

References 49 publications

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“…www.nature.com/scientificreports www.nature.com/scientificreports/ samples 2.5% CuO, 5% CuO and 7.5% CuO, respectively. These organic-inorganic (CMC-CuO) based sensors are in good agreement with the previously reported sensors for H 2 S gas 38,39 .…”

Section: Resultssupporting

confidence: 91%

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Cellulose-Copper Oxide hybrid nanocomposites membranes for H2S gas detection at low temperatures

Hittini

Abu-Hani

Reddy

et al. 2020

Sci Rep

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We report on novel, sensitive, selective and low-temperature hydrogen sulfide (H 2 S) gas sensors based on metal-oxide nanoparticles incorporated within polymeric matrix composites. the copper-Oxide (CuO) nanoparticles were prepared by a colloid microwave-assisted hydrothermal method that enables precise control of nanoparticle size. The sodium carboxymethyl cellulose (CMC) powder with 5% glycerol ionic liquid (IL) was prepared and mixed with different concentrations of CuO NPs (2.5-7.5 wt.%) to produce flexible and semi-conductive polymeric matrix membranes. Each membrane was then sandwiched between a pair of electrodes to produce an H 2 S gas sensor. the temperature-dependent gas sensing characteristics of the prepared sensors were investigated over the temperature ranges from 40 °C to 80 °C. The sensors exhibited high sensitivity and reasonably fast responses to H 2 S gas at low working temperatures and at a low gas concentration of 15 ppm. Moreover, the sensors were highly selective to H 2 S gas, and they showed low humidity dependence, which indicates reliable functioning in humid atmospheres. This organic-inorganic hybrid-materials gas sensor is flexible, with good sensitivity and low power consumption has the potential to be used in harsh environments.Hydrogen sulfide gas (H 2 S) is a major air pollutant that is produced in a large quantity from industrial fields such as petroleum and gas drilling and refining, sewage treatment, coke ovens, kraft paper mills, and landfills 1,2 . H 2 S gas is toxic gas with a malodor of rotten eggs. It can damage human respiratory and nerve systems, causing the public to lose consciousness with a possibility to die at minimal concentrations as low as a few hundreds of ppm 3-5 . Therefore, improving H 2 S sensors in terms of sensitivity, selectivity, response time, power consumption, and the cost is needed for environmental and safety concerns.Different materials and methods have been reported in the literature for H 2 S gas detection, including electrochemical (solid electrolyte) sensors 5 , optical sensors 6,7 , piezoelectric sensors 8,9 , and oxide-semiconductor sensors 10,11 . However, most of these sensors developed using such methods suffer from high fabrication cost, high power consumption, poor stability, and malfunction in harsh environment 12,13 . Therefore, these sensors have been under continuous development to meet the growing demand of high-performance sensors. Metal-oxide semiconducting nanoparticles based sensors are the most promising materials for the H 2 S gas detection; they are cost-effective, easy to operate and fast in response with high sensitivity to the target gas 14,15 . Therefore, the development of new sensors that include polymer membranes and metal-oxide nanoparticles (organic-inorganic sensors) is expected to enhance the functionalities of such sensors; as they are flexible, easy to fabricate, and can be operated at low temperature with a low electrical power requirement [14][15][16] . Metal-oxide based sensors are flexible, easy to fabricate,...

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Section: Resultssupporting

confidence: 91%

“…(4), which neutralize the holes in the p-type oxide semiconductor (Eq. (5)), thereby increasing the measured resistance 38 . While the ionic liquid and metal-oxide semiconducting NPs initiate paths for the current, the polymer matrix hosts the NPs in the composites.…”

Section: Resultsmentioning

confidence: 99%

Cellulose-Copper Oxide hybrid nanocomposites membranes for H2S gas detection at low temperatures

Hittini

Abu-Hani

Reddy

et al. 2020

Sci Rep

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“…The XRD patterns for BOPET‐ArCOOH/ZnO, BOPET‐ArCOOH/PANI, and BOPET‐ArCOOH/ZnO/PANI films are shown in Figure . The X‐ray diffractogram of BOPET‐ArCOOH/PANI shows only the characteristic peaks of BOPET at 30° and 65° due to the low thickness of the films . The ZnO nanorods grown on BOPET‐ArCOOH exhibit typical diffraction peaks centered at 2 θ values of 36.70, 44.39, 56.6, and 66.37° (see inset of Figure ) assigned to the (101), (102), (110), and (200) of the crystalline zinc oxide phase with the hexagonal wurtzite (JCPDS, Card No.…”

Section: Resultsmentioning

confidence: 99%

Polyaniline‐Wrapped ZnO Nanorod Composite Films on Diazonium‐Modified Flexible Plastic Substrates

Mekki

Ait-Touchente

Samanta

et al. 2016

Macro Chemistry & Physics

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Vertically aligned core/shell‐like polyaniline‐wrapped ZnO nanorod composite films are prepared on diazonium‐modified biaxially oriented polyethylene terephthalate (BOPET) sheets, in two main steps. (i) The BOPET substrate is modified by grafting of 4‐aminobenzenoic groups from the in situ generated diazonium compound; (ii) ZnO nanorod/polyaniline composite film is grown on the substrates by wet chemical route followed by the preparation of polyaniline (PANI) by in situ chemical oxidative polymerization of aniline on the immobilized ZnO nanorods. Scanning electron microscopy images reveal the vertical growth and homogeneous distribution of the ZnO nanorods and their nanocomposites on the diazonium modified substrates. In contrast, the ZnO and PANI‐coated ZnO nanorods are randomly distributed on pristine BOPET. X‐ray photoelectron spectra permit to characterize the chemical nature of the aryl and the nanocomposite adlayers. X‐ray diffraction analysis results indicate that ZnO nanorods retain their wurtzite structure within the nanocomposite coating. Fourier‐transform infrared (FTIR) and Raman indicate the presence of interaction between ZnO nanorods and PANI chains. The ZnO/PANI‐coated diazonium‐modified BOPET sheets exhibit excellent mechanical flexibility with electroconductive characteristics even in the highly bent state. This work highlights the efficiency of the interfacial chemistry of aryl diazonium salts in the preparation of nanocomposite films with outstanding morphology, adhesion, and physical properties even under mechanical stress.

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“…PANI/Ag films (with AgNO 3 concentration around 0.5 M) were prepared by Mekki et al [74] and their chemiresistive gas sensing properties were investigated by exposure of 10 ppm of different gases, but appropriate response wes observed only for H 2 S gas. Authors observed an increase of the electrical current upon gas exposure instead of an expected decrease, considering the electron donating nature of H 2 S (reducing gas).…”

Section: Pani-based Gas and Vapour Sensorsmentioning

confidence: 99%

Chemiresistive polyaniline-based gas sensors: A mini review

Fratoddi

Venditti

Cametti

et al. 2015

Sensors and Actuators B: Chemical

384

187

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This review focuses on some recent advances made in the field of gas sensors based on polyaniline [PANI], a conducting polymer with excellent electronic conductivity and electrochemical properties. Conducting polymers represent an important class of organic materials with an enhanced resistivity towards external stimuli. Among them, PANI polymers have attracted wide interest because of the versatility in their use, combined with the easy of synthesis, high yield and good environmental stability, together with a favorable response to guest molecules at room temperature. Moreover, PANI can be shaped into various structures with different morphologies and the possibility of obtaining nanofibers, in addition to thin films, has opened a rapid development of ultrasensitive chemical sensors, with improved processability and functionality. This review provides a brief description of the current status of gas chemiresistive sensors based on polyaniline and highlights the properties and applications of these devices in diverse range of application

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H2S sensing using in situ photo-polymerized polyaniline–silver nanocomposite films on flexible substrates

Cited by 101 publications

References 49 publications

Cellulose-Copper Oxide hybrid nanocomposites membranes for H2S gas detection at low temperatures

Cellulose-Copper Oxide hybrid nanocomposites membranes for H2S gas detection at low temperatures

Polyaniline‐Wrapped ZnO Nanorod Composite Films on Diazonium‐Modified Flexible Plastic Substrates

Chemiresistive polyaniline-based gas sensors: A mini review

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