The Effect of PMMA Pore-Forming on Hydrogen Sensing Properties of Porous SnO<sub>2</sub> Thick Film Sensor

Zhang, Qingyan; Zhou, Qu; Yin, Xi-Tao; Liu, Hongcheng; Xu, Lingna; Tan, Weiming; Tang, Chao

doi:10.1166/sam.2017.3111

Cited by 15 publications

(9 citation statements)

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“…Until recently, oxide films have shown a lot of potential application for fabricating flat-panel displays, gas sensors, high electrical conductivity, protective coatings, light-emitting devices, and spintronics devices etc. and so forth [1][2][3][4][5][6][7][8][9][10][11]. At present, some semiconductor materials having magnetic properties (DMSs) are frequently mixed with other oxides having room temperature ferromagnetic properties (RTFM) for their promising spintronics applications [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

Sagadevan¹,

Johan²,

Aziz³

et al. 2019

Journal of Nanoelectronics and Optoelectronics

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A simple, facile co-precipitation technique was successfully used to synthesize the pure, and Mn-doped SnO 2 nanoparticles (NPs) and characterized by X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR)), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy and photoluminescence (PL). XRD analysis indicated that the prepared samples have the pure tetragonal structure of SnO 2. The doping of Mn on SnO 2 surface enhances the crystallite size of the SnO 2 NPs. The polycrystalline in nature SnO 2 nanoparticles was confirmed by SAED pattern. FT-IR analysis illustrates the presence of stretching vibration of the O-Sn-O bond in both SnO 2 and Mn-doped SnO 2 NPs. SEM and TEM analysis shows that the SnO 2 particles are spherical in shape and are uniformly dispersed inside the nanocomposite matrix. The average particle size of SnO 2 in pure SnO 2 and Mn-doped SnO 2 NPs was determined as~14 and 12 nm respectively. The optical analysis confirmed a redshift by doping Mn on SnO 2. The band gap energy for pure SnO 2 and Mn-doped SnO 2 NPs are 3.14 eV to 2.87 eV, respectively. The visible emission was observed from PL analysis. Photocatalytic activity of the pure SnO 2 and Mn-doped SnO 2 are tested using Rhodamine B (RhB) dye as a model compound under UV light. The results revealed that the Mn-doped SnO 2 NPs exhibited higher efficiency than pure SnO 2 for the degradation of RhB dye and furthermore with increasing the amount of Mn doping further enhanced the degradation rate of R hB dye. The synthesized samples present good reusable stability. Dielectric loss of the prepared pure and Mn-doped SnO 2 NPs exhibited a linear trend at higher frequency domain. Increased dopant amount reduced the ac conductivity which is attributed to the particle size effect with the presence of the impurities.

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Section: Introductionmentioning

confidence: 99%

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

Sagadevan¹,

Johan²,

Aziz³

et al. 2019

Journal of Nanoelectronics and Optoelectronics

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“…Finally, the stability of the sensing materials was improved by putting the sensor on the aging instrument of the side heated sensor at 120°C for 10 days. The sensor response was defined as S = R a /R g (Zhang Q. Y. et al, 2017), where R a and R g were the resistances of the sensing material measured in air and in atmosphere containing target test gas H 2 S, respectively (Zhu et al, 2017). Gas sensing properties of the obtained sensors were performed with the CGS-8 TP intelligent gas sensing analysis system (Chemical gas sensor-8, Beijing Elite Tech Co., Ltd., China).…”

Section: Methodsmentioning

confidence: 99%

Electrospun ZnO–SnO2 Composite Nanofibers and Enhanced Sensing Properties to SF6 Decomposition Byproduct H2S

Zhou

Wang

et al. 2018

Front. Chem.

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Hydrogen sulfide (H2S) is an important decomposition component of sulfur hexafluoride (SF6), which has been extensively used in gas-insulated switchgear (GIS) power equipment as insulating and arc-quenching medium. In this work, electrospun ZnO-SnO2 composite nanofibers as a promising sensing material for SF6 decomposition component H2S were proposed and prepared. The crystal structure and morphology of the electrospun ZnO-SnO2 samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The composition of the sensitive materials was analyzed by energy dispersive X-ray spectrometers (EDS) and X-ray photoelectron spectroscopy (XPS). Side heated sensors were fabricated with the electrospun ZnO-SnO2 nanofibers and the gas sensing behaviors to H2S gas were systematically investigated. The proposed ZnO–SnO2 composite nanofibers sensor showed lower optimal operating temperature, enhanced sensing response, quick response/recovery time and good long-term stability against H2S. The measured optimal operating temperature of the ZnO–SnO2 nanofibers sensor to 50 ppm H2S gas was about 250°C with a response of 66.23, which was 6 times larger than pure SnO2 nanofibers sensor. The detection limit of the fabricated ZnO–SnO2 nanofibers sensor toward H2S gas can be as low as 0.5 ppm. Finally, a plausible sensing mechanism for the proposed ZnO–SnO2 composite nanofibers sensor to H2S was also discussed.

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“…Among them, SnO 2 is one of the earliest metal oxides, due to its wide band gap, excellent physicochemical properties, and low-price for gas sensing (Uddin and Chung, 2015;Thanihaichelvan et al, 2019). It can easily generate oxygen vacancies on the surface, leading to high specific surface area, and excellent sensing properties (Zhang et al, 2017;Ren et al, 2019). For SnO 2 , various morphologies of nanostructures have been reported, for instance, zero dimensional nanoparticles (Ahmed et al, 2019), one dimensional nanorods (Zhou et al, 2016), nanowires (Tonezzer, 2019), and nanofibers (Mudra et al, 2019), and two dimensional nanosheets (Chang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cr2O3 Nanoparticle-Coated SnO2 Nanofibers and C2H2 Sensing Properties

Gao

Zhou

et al. 2019

Front. Mater.

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In this work, Cr 2 O 3 nanoparticles, and SnO 2 nanofibers were fabricated by a sol-gel process and an electrospinning method, respectively. Gas sensitive materials with high sensitivity to C 2 H 2 gas were obtained by coating Cr 2 O 3 nanoparticles on SnO 2 nanofibers. The prepared Cr 2 O 3 nanoparticle-coated SnO 2 nanofibers (Cr 2 O 3 NPs. coated SnO 2 NFs.) were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and the gas sensing behaviors to C 2 H 2 were studied. The Cr 2 O 3 NPs. coated SnO 2 NFs. exhibited low optimal operating temperature, high sensing response, excellent response-recovery time, and long-term stability to C 2 H 2. The optimal operating temperature of the measured material to 20 ppm C 2 H 2 was about 220 • C and the C 2 H 2 concentration had a good linear relationship with the response value when the concentration was 60 ppm. In addition, a reasonable gas sensing mechanism was proposed which may enhance the gas sensing performances for the Cr 2 O 3 NPs. coated SnO 2 NFs. to C 2 H 2. Keywords: Cr 2 O 3 nanoparticles, SnO 2 nanofibers, electrospinning, C 2 H 2 , sensing properties

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The Effect of PMMA Pore-Forming on Hydrogen Sensing Properties of Porous SnO₂ Thick Film Sensor

Cited by 15 publications

References 0 publications

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

Electrospun ZnO–SnO2 Composite Nanofibers and Enhanced Sensing Properties to SF6 Decomposition Byproduct H2S

Synthesis of Cr2O3 Nanoparticle-Coated SnO2 Nanofibers and C2H2 Sensing Properties

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The Effect of PMMA Pore-Forming on Hydrogen Sensing Properties of Porous SnO2 Thick Film Sensor

Cited by 15 publications

References 0 publications

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

Influence of Mn Doping on the Properties of Tin Oxide Nanoparticles Prepared by Co-Precipitation Method

Electrospun ZnO–SnO2 Composite Nanofibers and Enhanced Sensing Properties to SF6 Decomposition Byproduct H2S

Synthesis of Cr2O3 Nanoparticle-Coated SnO2 Nanofibers and C2H2 Sensing Properties

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The Effect of PMMA Pore-Forming on Hydrogen Sensing Properties of Porous SnO₂ Thick Film Sensor