Synthesis of SnO2/ZnO composite nanofibers by electrospinning method and study of its ethanol sensing properties

Khorami, Hamed Akbari; Keyanpour-Rad, Mansoor; Vaezi, Mohammad

doi:10.1016/j.apsusc.2011.04.052

Cited by 75 publications

(24 citation statements)

References 22 publications

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“…Therefore, reaction between the target gas and the sensor's surface could not be easily proceed because of the aggregation of RO at the surface of the sensor, and as a result the sensitivity of the sensor is low at lower temperatures [4]. The elevation of the temperature facilitates the separation of RO from the sensor's surface and could facilitate the reaction between the target gas and the sensor's surface.…”

Section: Sno 2 Dnws Sensing Propertiesmentioning

confidence: 99%

“…Therefore various types of the 1D SnO 2 nanostructure forms have recently gained great prominence as gas sensors [1][2][3][4]. For example, SnO 2 nanowires [1,2], SnO 2 nanowires mixed nanodendrites [3], SnO 2 nanofibers [4] have exhibited high nitrogen dioxide (NO 2 ) and ethanol sensing response.…”

Section: Introductionmentioning

confidence: 99%

“…Tin oxide (SnO 2 ) is an n-type semiconductor, which has been extensively studied for various applications, including gas sensors [1][2][3][4][5][6][7][8], catalyst support [9], transparent conducting electrodes [10] and lithium ion battery anode materials [11]. Studies have proven that the properties and performance of SnO 2 -based devices can be dramatically influenced by structure features.…”

Section: Introductionmentioning

confidence: 99%

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SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

Mohamed

2012

Journal of Alloys and Compounds

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Section: Sno 2 Dnws Sensing Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

Mohamed

2012

Journal of Alloys and Compounds

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“…In order to protect human and social security, many gas sensors that can quickly and sensitively detect toxic gases were prepared and widely used in the chemical industry [1]. SnO 2 has been proved to be an excellent gassensing material and some intensive studies have been put into practice to improve the sensing performance of SnO 2 gas sensors [2]. One dimensional (1D) nanostructures such as nanowires, nanofibers, nanotubes and nanobelts have attracted much attention due to their special physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and low-temperature gas-sensing properties of SnO2 ultra-fine fibers fabricated by a centrifugal spinning process

Xia

et al. 2016

J Sol-Gel Sci Technol

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In this paper, centrifugal spinning technology and calcination were used to prepare SnO 2 ultra-fine fibers. Several parameters such as the concentration of SnCl 4 , rotational speed, and diameter of the spinneret were discussed to determine the optimum spinning conditions. The obtained as-spun fibers and SnO 2 ultra-fine fibers were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), FT-IR spectra and X-ray photoelectron spectroscopy (XPS), and the low-temperature gassensing properties of the SnO 2 sample were systematically investigated. The results proved that the SnO 2 sample had good sensitivity for a variety of measured gases at low temperature. Among these, the SnO 2 sensor showed the highest sensitivity for HCl gas, and the sensitivity for ethanol gas increased rapidly when its concentration exceeded 1200 ppm. Our results demonstrated that the centrifugal spinning could be a potential approach for preparing the SnO 2 gas sensor. Graphical AbstractKeywords Centrifugal spinning Á SnO 2 ultra-fine fibers Á Gas sensor Á Sensitivity

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“…Baseadas nesta propriedade, diversas aplicações têm sido consideradas para esses materiais, das quais podemos destacar: novos biomateriais, detectores de voláteis [1] e dispositivos "labs on a chip" [2] . A potencialização de aplicações médicas como medicina regenerativa [3] /substituição de pele [4] e liberação controlada de fármacos [5] depende da aplicação de hidrogéis (naturais e sintéticos) com potencial biocompatibilidade e pequeno tamanho de poro associado à elevada área superficial.…”

Section: Introductionunclassified

Preparação e caracterização de microfibras de poli(álcool vinílico)/dióxido de titânio

Oliveira¹,

Moura²

2013

Polímeros

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Resumo:Compósitos de poli(álcool vinílico)/dióxido de titânio preparados pela técnica de eletrofiação são potenciais candidatos para aplicações nas quais grande absorbância na região do ultra-violeta e transparência na região do visível são requeridas. A incorporação de semicondutor nas fibras pode ser inferida pela redução da impedância elétrica das fibras fabricadas por eletrofiação, como consequência do aumento na densidade de grãos de semicondutor dispersos nas fibras poliméricas. As propriedades térmicas do compósito polímero/semicondutor são dominadas pela resposta do PVA sendo a influência do dióxido de titânio detectada no espectro de absorção de luz pela maximização da absorbância na faixa de 240 nm a 400 nm. Os resultados indicam que o compósito de PVA/TiO 2 pode ser convenientemente aplicado como curativo com proteção adicional contra efeitos de radiação ultravioleta (UVA e UVB) na pele humana. Uma aplicação adicional para o compósito PVA/TiO 2 foi abordada com o estudo dos processos fotocatalíticos na degradação da rodamina B. Palavras-chave: Eletrofiação, compósitos poliméricos, dióxido de titânio, poli(álcool vinílico). Preparation and Characterization of Polyvinyl Alcohol/Titanium Dioxide MicrofibersAbstract: Electrospun composites of polyvinyl alcohol/titanium dioxide are potential candidates for applications that require high level of absorbance in the UV and transparency in the visible region. The incorporation of semiconductor particles in the core of fibers can be inferred from the reduction in the electrical impedance of electrospun fibers, as a consequence of the increased density of semiconductor granules along the fiber. The thermal properties of PVA dominate in the complete response of the composite while the influence from titanium dioxide is noted with an increased absorption from 240 nm to 400 nm. The results indicate that the PVA/TiO 2 composites can be applied as wound dressing with additional protection against effects of ultraviolet radiation (UVA and UVB) on human skin. An additional application studied here was based on the use of PVA/TiO 2 nanocomposites as active agent in photodegrading rhodamine B. Keywords: Electrospinning, polymeric composites, titanium dioxide, polyvinyl alcohol. IntroduçãoA eletrofiação representa um método simples e de baixo custo que promove a fabricação de uma grande quantidade de fibras ultrafinas. Baseadas nesta propriedade, diversas aplicações têm sido consideradas para esses materiais, das quais podemos destacar: novos biomateriais, detectores de voláteis [1] e dispositivos "labs on a chip" [2] . A potencialização de aplicações médicas como medicina regenerativa [3] /substituição de pele [4] e liberação controlada de fármacos [5] depende da aplicação de hidrogéis (naturais e sintéticos) com potencial biocompatibilidade e pequeno tamanho de poro associado à elevada área superficial. Em todos os casos descritos anteriormente, o uso de hidrogéis como a quitosana e o PVA são fundamentais para a produção de micro/nano fibras [6] . No caso do PVA, (polím...

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Synthesis of SnO2/ZnO composite nanofibers by electrospinning method and study of its ethanol sensing properties

Cited by 75 publications

References 22 publications

SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

Preparation and low-temperature gas-sensing properties of SnO2 ultra-fine fibers fabricated by a centrifugal spinning process

Preparação e caracterização de microfibras de poli(álcool vinílico)/dióxido de titânio

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