Effect of Modification/Doping on Gas Sensing Properties of SnO2

Nagirnyak, Svitlana V.; Dontsova, Tetiana

doi:10.21767/2471-9838.100025

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…Yu and Dutta first noted the ability of an Au@SnO 2 core–shell nanostructure to lower the operating temperature of SnO 2 gas sensors . Complementary research conducted by Wu and co-workers found that both silver nanoparticle (Ag NP) and Au NP cores can enable tin oxide shells to sense gases such as formaldehyde, ethanol, and carbon monoxide (CO) at room temperature. , While exploiting the strong LSPR properties of noble-metal nanoparticles can also enhance the light-activated gas sensing in metal oxides, doping can add additional enhancements to the sensing properties of tin oxides. , Notably, antimony doping in tin oxide sensors creates a material resistant to hydroxyl poisoning induced by humidity; moreover, ATO has been used to sense CO, ethanol, ammonia, and chlorine …”

Section: Introductionmentioning

confidence: 99%

Antimony- and Zinc-Doped Tin Oxide Shells Coated on Gold Nanoparticles and Gold–Silver Nanoshells Having Tunable Extinctions for Sensing and Photonic Applications

Medhi

Lee

et al. 2020

ACS Appl. Nano Mater.

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This paper reports the synthesis and study of doped metal oxides as the shell in core−shell nanoparticle architectures. Specifically, the paper describes the synthesis of gold nanoparticles (Au NPs) and gold−silver nanoshells (GS-NSs) coated with antimony-and zinc-doped tin oxide (SnO 2 ) shells (i.e., Au@ATO, Au@ZTO, GS-NS@ATO, and GS-NS@ZTO) with a comparison to the undoped SnO 2 -coated analogues Au@SnO 2 and GS-NS@ SnO 2 . The doped tin oxide core−shell nanoparticles prepared here were thoroughly characterized using scanning electron microscopy, transmission electron microscopy, dynamic light scattering, energydispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. Separately, their optical properties were evaluated by UV−vis and photoluminescence spectroscopy. The results demonstrate that noble-metal nanoparticles such as Au NPs and GS-NSs, which exhibit strong surface plasmon resonances at visible-to-near-IR wavelengths, can be activated across a broader region of the solar spectrum when used in conjunction with wideband-gap semiconductors. In particular, utilization of a GS-NS core induces near-complete suppression in the electron−hole recombination processes in the tin oxide materials. Potential impacts on sensing and photonic applications are highlighted.

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Section: Introductionmentioning

confidence: 99%

Antimony- and Zinc-Doped Tin Oxide Shells Coated on Gold Nanoparticles and Gold–Silver Nanoshells Having Tunable Extinctions for Sensing and Photonic Applications

Medhi

Lee

et al. 2020

ACS Appl. Nano Mater.

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“…In addition to these developments which provide significant advances in low concentration gas detection, further manufacturing processes have been developed to enhance both selectivity and sensitivity of a sensor. For instance, a popular method applied to increase the sensitivity and selectivity of semiconductor metal oxide sensors is through doping [20][21][22]. The performance enhancement based on doping was highlighted in a study completed by Xiang et al [23] who doped ZnO nanorods with Ag.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of SnO2 Composite Nanofiber-Based Gas Sensor Using the Electrospinning Method for Tetrahydrocannabinol (THC) Detection

et al. 2020

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This paper presents the development of a metal oxide semiconductor (MOS) sensor for the detection of volatile organic compounds (VOCs) which are of great importance in many applications involving either control of hazardous chemicals or noninvasive diagnosis. In this study, the sensor is fabricated based on tin dioxide (SnO2) and poly(ethylene oxide) (PEO) using electrospinning. The sensitivity of the proposed sensor is further improved by calcination and gold doping. The gold doping of composite nanofibers is achieved using sputtering, and the calcination is performed using a high-temperature oven. The performance of the sensor with different doping thicknesses and different calcination temperatures is investigated to identify the optimum fabrication parameters resulting in high sensitivity. The optimum calcination temperature and duration are found to be 350 °C and 4 h, respectively and the optimum thickness of the gold dopant is found to be 10 nm. The sensor with the optimum fabrication process is then embedded in a microchannel coated with several metallic and polymeric layers. The performance of the sensor is compared with that of a commercial sensor. The comparison is performed for methanol and a mixture of methanol and tetrahydrocannabinol (THC) which is the primary psychoactive constituent of cannabis. It is shown that the proposed sensor outperforms the commercial sensor when it is embedded inside the channel.

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“…SnO 2 nanostructures had been discovered in various forms such as SnO 2 thin film [10], nanowires (NWs) [12], nanorods [2], nanorings [13], and nanotubes [19]. To develop efficient gas sensors, SnO 2 thin film has been modified by doping with metallic impurities which is a promising way as it modifies the electronic properties of film and the gas molecule adsorption sites which in turn affect the sensing properties [9,16,21]. Therefore, SnO 2 thin film that was doped by Cu has resulted in enhancing the LPG sensing performance [15,20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Cu-Doped SnO\(_2\) (Sn\(_{0.98}\)Cu\(_{0.02}\)O\(_2\)) Thin Film by Sol-gel Technique for LPG Sensing

Seddik

Salima

Ghamri

et al. 2020

Jour. Atom. Mol. Conden. Matt. Nano Physics

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In this study Cu-doped SnO 2 (Sn 0.98 Cu 0.02 O 2 ) thin film was deposited on the glass substrate by sol-gel dip-coating technique. The structural, morphological, and optical properties of the prepared film were studied by X-ray diffraction (XRD), Optical Microscopy (OM), and Uv-visible spectroscopy respectively. XRD analysis revealed that the structure of our deposited film is hexagonal and the crystallite size is found to be 3.89 nm. The surface morphological studied by (OM) indicates that the film is homogeneous. The result of optical properties shows high transmittance estimated at 73.98% and the optical band gap was found 3.961 eV. The gas sensing properties of the prepared film were examined at different operating temperatures and different volume concentrations of liquefied petroleum gas (LPG). It was found that Cu doped SnO 2 has an excellent response and recovery time for 1.8 vol% LPG at 250 • C, their values are equal to 11s and 19s respectively, obtained sensors presents high selectivity to LPG against H 2 S, NH 3 and CO 2 .

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Effect of Modification/Doping on Gas Sensing Properties of SnO2

Cited by 11 publications

References 26 publications

Antimony- and Zinc-Doped Tin Oxide Shells Coated on Gold Nanoparticles and Gold–Silver Nanoshells Having Tunable Extinctions for Sensing and Photonic Applications

Antimony- and Zinc-Doped Tin Oxide Shells Coated on Gold Nanoparticles and Gold–Silver Nanoshells Having Tunable Extinctions for Sensing and Photonic Applications

Fabrication of SnO2 Composite Nanofiber-Based Gas Sensor Using the Electrospinning Method for Tetrahydrocannabinol (THC) Detection

Synthesis and Characterization of Cu-Doped SnO\(_2\) (Sn\(_{0.98}\)Cu\(_{0.02}\)O\(_2\)) Thin Film by Sol-gel Technique for LPG Sensing

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