Ultrasensitive flexible NH3 gas sensor based on polyaniline/SrGe4O9 nanocomposite with ppt-level detection ability at room temperature

Zhang, Yajie; Zhang, Junxin; Jiang, Yadong; Duan, Zaihua; Liu, Bohao; Zhao, Qiuni; Wang, Si; Yuan, Zhen; Tai, Huiling

doi:10.1016/j.snb.2020.128293

Cited by 156 publications

(77 citation statements)

References 49 publications

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“…If the PANI’s sensing characteristic is changed to n-type, p-n heterojunctions are formed by the addition of material, which acts as p-type (electron acceptor), e.g., carbon nanotubes [ 35 ]. As a result, ultra-low detection limits (0.25 ppb at 60% RH and RT [ 50 ], 0.25 ppb [ 33 ] and <16 ppb [ 34 ] at RT with humidity compensation) can be achieved. In contrast, this work is based on pure PANI with the simplest dopant (HCl) and no additional nanomaterial.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the calculated response time for the presented system is over-estimated and is probably much shorter. Regarding the PANI's conductivity and sensing performance, the addition of an appropriate nanomaterial, i.e., electron donors or acceptors, in the form of metal, metal oxide nanoparticles or carbon nanotubes, enhances the conductivity due to the p-n heterojunction at the interface between the p-type PANI and n-type nanoparticles [33,34,50]. If the PANI's sensing characteristic is changed to n-type, p-n heterojunctions are formed by the addition of material, which acts as p-type (electron acceptor), e.g., carbon nanotubes [35].…”

Section: Nh 3 -Sensing Performance Of the Pani-au-spementioning

confidence: 99%

“…By combining a knowledge of resistivity-based gas sensing and electrochemistry, we focused our work on developing a NH 3 -detection system based on electrochemically synthesised “pure” PANI without the use of any complex dopants [ 29 , 30 , 31 ] and nanomaterials [ 5 , 21 , 32 , 33 , 49 , 50 ]. PANI was chosen because of its superior sensing performance with regard to ammonia [ 6 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

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Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Korent

Soderžnik

Šturm

et al. 2020

Sensors

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Polyaniline (PANI) is a conducting polymer, widely used in gas-sensing applications. Due to its classification as a semiconductor, PANI is also used to detect reducing ammonia gas (NH3), which is a well-known and studied topic. However, easier, cheaper and more straightforward procedures for sensor fabrication are still the subject of much research. In the presented work, we describe a novel, more controllable, synthesis approach to creating NH3 PANI-based receptor elements. The PANI was electrochemically deposited via cyclic voltammetry (CV) on screen-printed electrodes (SPEs). The morphology, composition and surface of the deposited PANI layer on the Au electrode were characterised with electron microscopy, Fourier-transform infrared spectroscopy and profilometry. Prior to the gas-chamber measurement, the SPE was suitably modified by Au sputtering the individual connections between the three-electrode system, thus showing a feasible way of converting a conventional three-electrode electrochemical SPE system into a two-electrode NH3-gas detecting system. The feasibility of the gas measurements’ characterisation was improved using the gas analyser. The gas-sensing ability of the PANI-Au-SPE was studied in the range 32–1100 ppb of NH3, and the sensor performed well in terms of repeatability, reproducibility and sensitivity.

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Section: Resultsmentioning

confidence: 99%

Section: Nh 3 -Sensing Performance Of the Pani-au-spementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Korent

Soderžnik

Šturm

et al. 2020

Sensors

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“…A highly porous layer with a large surface area, high pore volume, and desired pore size could introduce more active sites and increase the gas molecule absorption. By introducing inorganic nanomaterials, the film morphology of the nanocomposite films and the gas-sensing performances can be adjusted freely [ 13 , 15–20 ]. The inorganic nanomaterials could be a template for the polymerization of conducting polymers, where the nanocomposite morphology could be determined by the inorganic nanomaterials and polymerization methods.…”

Section: Comprehensive Roles Of Inorganic Nanomaterials In Gas-sensinmentioning

confidence: 99%

Conducting polymer-inorganic nanocomposite-based gas sensors: a review

Yan

Yang

et al. 2020

Science and Technology of Advanced Materials

120

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With the rapid development of conductive polymers, they have shown great potential in room-temperature chemical gas detection, as their electrical conductivity can be changed upon exposure to oxidative or reductive gas molecules at room temperature. However, due to their relatively low conductivity and high affinity toward volatile organic compounds and water molecules, they always exhibit low sensitivity, poor stability, and gas selectivity, which hinder their practical gas sensor applications. In addition, inorganic sensitive materials show totally different advantages in gas sensors, such as high sensitivity, fast response to low concentration analytes, high surface area, and versatile surface chemistry, which could complement the conducting polymers in terms of the sensing characteristics. It seems to be a win-win choice to combine inorganic sensitive materials with polymers for gas detection due to their synergistic effects, which has attracted extensive interests in gas-sensing applications. In this review, we summarize the recent development in polymer-inorganic nanocomposite based gas sensors. The roles of inorganic nanomaterials in improving the gas-sensing performances of conducting polymers are introduced and the progress of conducting polymer-inorganic nanocomposites including metal oxides, metal, carbon (carbon nanotube, graphene), and ternary composites are presented. Finally, a conclusion and a perspective in the field of gas sensors incorporating conducting polymer-inorganic nanocomposite are summarized.

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“…[ 16 ] Due to this a lot of room‐temperature NH 3 sensors are developed recently. [ 3,17–20 ] Despite that, the reports on room‐temperature NH 3 sensors based on ZnO–SnO 2 composite material are limited. Chitra et al reported the suitability of ZnO/SnO 2 /Zn 2 SnO 4 composite material for gas sensing applications at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Sputtering Power and Annealing Effects on the Properties of Zn₂SnO₄–SnO₂ Composite Thin Film for Pungent Smelling Gas (NH₃) Detection

Cynthia

Sivakumar

Sanjeeviraja

et al. 2020

Physica Status Solidi (a)

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Recently, metal oxide semiconductors have attracted the research community because of their highly appreciable optoelectronic properties, which made them more suitable for many device applications such as super capacitors, solar cells, gas sensors, photocatalysts, light emitting devices, and so on. [1-5] As a further development it was observed that coupling of two metal oxide semiconductors with different bandgaps improved their physical and chemical properties by affecting their electron-hole pair. These improved physical and chemical properties equipped many of the composite metal oxide semiconductors to act as good gas sensors. For instance, Chesler et al. concluded in their report that ZnO-SnO 2 composite sensor showed an increased sensor response (SR) toward CO than the pristine oxides. [6] In addition, Zhao et al. reported that the ZnO-SnO 2 heterostructures showed enhanced selectivity and response toward NO 2 and ethanol when compared with pure ZnO nanowire. [7] Furthermore, Mondal et al. said that the ZnO-SnO 2 composite thin film sensor showed enhanced sensing property over ZnO sensor. [8] Furthermore, Wang et al. reported that the ZnO/CuO composite-based sensor exhibited a superior response to H 2 S at low operating temperature. [9] It is known that our atmosphere is surrounded by numerous kinds of natural and artificial chemical gases. Some of them are essential and some others are harmful to our life. Ammonia (NH 3) is one among the various harmful gases. NH 3 is a colorless toxic gas with a pungent smelling, and long-term exposure and inhalation to higher concentration lead to serious health problems such as laryngitis, tracheobronchitis, bronchopneumonia, and pulmonary edema. Also, the existence of NH 3 in the exhale breath of people acts as a biomarker for some disease. [10] Early detection of NH 3 is a great concern to counter the accidental threats.

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Ultrasensitive flexible NH3 gas sensor based on polyaniline/SrGe4O9 nanocomposite with ppt-level detection ability at room temperature

Cited by 156 publications

References 49 publications

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Conducting polymer-inorganic nanocomposite-based gas sensors: a review

Sputtering Power and Annealing Effects on the Properties of Zn₂SnO₄–SnO₂ Composite Thin Film for Pungent Smelling Gas (NH₃) Detection

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Ultrasensitive flexible NH3 gas sensor based on polyaniline/SrGe4O9 nanocomposite with ppt-level detection ability at room temperature

Cited by 156 publications

References 49 publications

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Facile Fabrication of an Ammonia-Gas Sensor Using Electrochemically Synthesised Polyaniline on Commercial Screen-Printed Three-Electrode Systems

Conducting polymer-inorganic nanocomposite-based gas sensors: a review

Sputtering Power and Annealing Effects on the Properties of Zn2SnO4–SnO2 Composite Thin Film for Pungent Smelling Gas (NH3) Detection

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Sputtering Power and Annealing Effects on the Properties of Zn₂SnO₄–SnO₂ Composite Thin Film for Pungent Smelling Gas (NH₃) Detection