The investigation of reduced graphene oxide@ SnO2–polyaniline composite thin films for ammonia detection at room temperature

Ye, Zongbiao; Jiang, Yadong; Tai, Huiling; Guo, Ningjie; Xie, Guangzhong; Yuan, Zhen

doi:10.1007/s10854-014-2472-3

Cited by 31 publications

(15 citation statements)

References 37 publications

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“…In addition, the composite film shows a new peak at 285 nm, it could be attributed to the introduction of GN. 21 Moreover, it has a redshift with comparison to GN. All the results indicate that with the addition of GN in PANI, the intermolecular interaction between two materials was improved 22 and conducting system of PANI and GN was delocalized, 23 conjugated π-system was enhanced 19 and the energy bandgap would be widened as a result.…”

Section: Resultsmentioning

confidence: 99%

Effective Room-Temperature Ammonia-Sensitive Composite Sensor Based on Graphene Nanoplates and PANI

Chen

Liu

et al. 2018

ECS J. Solid State Sci. Technol.

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The graphene nanoplate (GN)-polyaniline (PANI) composite was developed via in-situ polymerization method and simultaneously assembled on interdigital electrodes (IDEs) at low temperature for ammonia (NH 3 ) detection. The assembled composite sensor showed excellent sensing performance toward different concentrations of NH 3 , 1.5 of response value and 123 s/204 s for the response/recovery time to 15 ppm NH 3 . Meanwhile, an interesting supersaturation phenomenon was observed at high concentration of NH 3 . A reasonable speculation was proposed for this special sensing behavior and the mechanism for enhanced sensing properties was also analyzed. Among the toxic gases of the interest, ammonia is a prominent example for its wide applications in industrial manufacturing and daily life. 1 It can even be generally produced in natural processes in animals, human and plants. 2 Ammonia can irritates skin, eyes and respiratory tract of humans when the concentration reaches to a certain value (the safety threshold is ∼25 ppm in air). 3 It is also flammable at concentration of ca. 15%-28% by volume in air. 4 Therefore, many approaches have been employed to detect ammonia, including gas chromatography, 5 polarography, 6 fluorometry 7 and spectrophotometry. 8 Meanwhile, with the consideration of the need for cheap, fast and efficient sensors, semiconductor-based gas sensors have been developed quickly. 9 As an emerging 2-D material, graphene has attracted much attention worldwide for its large specific surface area 10 and excellent electrical properties. 11,12 However, no material can be satisfactorily applied in any field, especially in complex scenarios. Theoretical and experimental studies have shown graphene performs limited selectivity to different kinds of gas species. 13 Composition with other functional materials would be an expectable choice. The conducting polymer, especially polyaniline (PANI), 14 is a promising choice, as their low cost and ability for room-temperature detection. 15 Extensive studies reported that the composite of PANI and graphene demonstrates efficient charge transport and collection, 16 as well as enhanced thermal and chemical stability. 17 Herein, GN-PANI nanocomposite film was synthesized by in-situ chemical oxidative polymerization of aniline in a functional graphene nanoplate (GN) suspension, and was simultaneously assembled onto a substrate with interdigital electrodes (IDEs) at low temperature. It suggests that the composite film sensor shows enhanced π electrons conjugation system, large specific surface area and stronger intermolecular interaction. Benefit from this, the composite showed a much improved sensing performance comparing with bare GN and bare PANI based sensors. z E-mail: zhichen@engr.uky.edu; taitai1980@uestc.edu.cn ExperimentalMaterials.-Aniline (≥99.5%), poly (diallyldimenthylammonium chloride) solution (PDDA) and poly (sodium 4-styrenesulfonate) (PSS) were purchased from Sigma-Aldrich Co., USA. Ammonium persulfate (APS) and hydrochloric acid (HCl) were obtained from Chen...

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Section: Resultsmentioning

confidence: 99%

Effective Room-Temperature Ammonia-Sensitive Composite Sensor Based on Graphene Nanoplates and PANI

Chen

Liu

et al. 2018

ECS J. Solid State Sci. Technol.

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“…They have also biological and medical applications [4]. Polyaniline (PANI) is an extensively studied conductive polymer [5][6][7][8]. It is light-weight polymer exhibiting high conductivity, low operational voltage and high stress.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and nano-scale free volume properties of polyaniline/polyvinyl alcohol nanocomposites

El‐Gamal

Ismail

El-Mallawany

2015

J Mater Sci: Mater Electron

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Polyaniline (PANI)/polyvinyl alcohol (PVA) nanocomposites has been prepared. Scanning electron microscopy, SEM of pure PVA and PANI/PVA nanocomposite films to monitor the morphology and dispersion of PANI on the surface of the PVA films. Positron annihilation lifetime measurements were carried out, in the air, at room temperature with a conventional fast-fast coincidence spectrometer. Dielectric permittivity e 0 , dielectric loss e 00 and AC conductivity r ac of PANI/PVA nanocomposites has been achieved in the range of frequencies 40 Hz-5 MHz and temperature range of 293-353 K. It was found that; O-ps lifetime, s 3 , its intensity, I 3 and relative fractional free volume, F r increase as the PANI content increases. The dielectric permitivity e 0 and loss e 00 increase with increasing the PANI content and decreases as the frequency increases. The values of the frequency exponent for the correlated barrier hopping s and the binding energy of the charge carriers W m for the investigated nanocomposites decrease with increasing PANI content. Finally, the dielectric permittivity e 0 was found to be directly proportional to the relative fractional free volume, F r .

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“…In situ chemical oxidative polymerization also was used for the preparation of graphene quantum dots (GQDs)/PANi [ 106 , 107 ]. SnO 2 /rGO/PANi nanocomposite was synthesized by using the in situ polymerization technique [ 108 , 109 , 110 ]. As seen in Figure 4 , rGO and aniline were added into the mixture of HCL and distilled water.…”

Section: Graphene/conducting Polymer Nanocomposites For Chemiresismentioning

confidence: 99%

“…The rGO@ SnO 2 /PANi composites were prepared by using the in situ chemical oxide polymerization for detecting different gases such as NH 3 [ 108 ], CH 4 [ 110 ], and H 2 S [ 109 ] at room temperature. The rGO@ SnO 2 /PANi composite film exhibited 160% response to 20 ppm NH 3 , 9.1% toward 100 ppb H 2 S, and 26.1% to 100 ppm of CH 4 .…”

Section: Graphene/conducting Polymer Nanocomposites For Chemiresismentioning

confidence: 99%

Recent Trends and Developments in Graphene/Conducting Polymer Nanocomposites Chemiresistive Sensors

Zamiri

Haseeb

2020

Materials

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The use of graphene and its derivatives with excellent characteristics such as good electrical and mechanical properties and large specific surface area has gained the attention of researchers. Recently, novel nanocomposite materials based on graphene and conducting polymers including polyaniline (PANi), polypyrrole (PPy), poly (3,4 ethyldioxythiophene) (PEDOT), polythiophene (PTh), and their derivatives have been widely used as active materials in gas sensing due to their unique electrical conductivity, redox property, and good operation at room temperature. Mixing these two materials exhibited better sensing performance compared to pure graphene and conductive polymers. This may be attributed to the large specific surface area of the nanocomposites, and also the synergistic effect between graphene and conducting polymers. A variety of graphene and conducting polymer nanocomposite preparation methods such as in situ polymerization, electropolymerization, solution mixing, self-assembly approach, etc. have been reported and utilization of these nanocomposites as sensing materials has been proven effective in improving the performance of gas sensors. Review of the recent research efforts and developments in the fabrication and application of graphene and conducting polymer nanocomposites for gas sensing is the aim of this review paper.

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The investigation of reduced graphene oxide@ SnO2–polyaniline composite thin films for ammonia detection at room temperature

Cited by 31 publications

References 37 publications

Effective Room-Temperature Ammonia-Sensitive Composite Sensor Based on Graphene Nanoplates and PANI

Effective Room-Temperature Ammonia-Sensitive Composite Sensor Based on Graphene Nanoplates and PANI

Dielectric and nano-scale free volume properties of polyaniline/polyvinyl alcohol nanocomposites

Recent Trends and Developments in Graphene/Conducting Polymer Nanocomposites Chemiresistive Sensors

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