Enhanced and selective ammonia detection using In2O3/reduced graphene oxide hybrid nanofibers

André, Rafaela S.; Mercante, Luiza A.; Facure, Murilo H. M.; Mattoso, Luiz H. C.; Corrêa, Daniel S.

doi:10.1016/j.apsusc.2018.12.101

Cited by 59 publications

(31 citation statements)

References 51 publications

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“…This is why we report here on investigations of a common cotton fabric as an example of a macroscopic textile and a nanofiber mat with fine pores as possible matrices to embed TiO 2 from an aqueous solution. Nanofiber mats can be produced by electrospinning [20][21][22], typically using water-soluble [23] or waterproof polymers [24], partly with integrated ceramics, metals, or other materials [25][26][27]. Polyacrylonitrile (PAN), lignin, and other materials are of special interest since they can be stabilized and carbonized after electrospinning, in this way creating conductive carbon nanofiber mats that can be used in a broad variety of applications [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Electrospun Nanofiber Mats with Embedded Non-Sintered TiO2 for Dye-Sensitized Solar Cells (DSSCs)

Mamun

Trabelsi

Klöcker

et al. 2019

Fibers

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TiO2 is a semiconductor that is commonly used in dye-sensitized solar cells (DSSCs). However, the necessity of sintering the TiO2 layer is usually problematic due to the desired temperatures of typically 500 °C in cells that are prepared on polymeric or textile electrodes. This is why textile-based DSSCs often use metal fibers or metallic woven fabrics as front electrodes on which the TiO2 is coated. Alternatively, several research groups investigate the possibilities to reduce the necessary sintering temperatures by chemical or other pre-treatments of the TiO2. Here, we report on a simple method to avoid the sintering step by using a nanofiber mat as a matrix embedding TiO2 nanoparticles. The TiO2 layer can be dyed with natural dyes, resulting in a similar bathochromic shift of the UV/Vis spectrum, as it is known from sintered TiO2 on glass substrates, which indicates an equivalent chemical bonding. Our results indicate a new possibility for producing textile-based DSSCs with TiO2, even on textile fabrics that are not high-temperature resistant.

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Section: Introductionmentioning

confidence: 99%

Electrospun Nanofiber Mats with Embedded Non-Sintered TiO2 for Dye-Sensitized Solar Cells (DSSCs)

Mamun

Trabelsi

Klöcker

et al. 2019

Fibers

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“…Among the approaches used, tailoring of composite metal oxides with different morphologies presents a good potential for tuning the sensitivity and selectivity during gas sensing. Many recent studies have shown that the selectivity and operating temperature of resistive-type gas sensors can be improved through the use of composite metal oxides (Andre et al, 2019;He et al, 2019;Rong et al, 2019;Sakthivel and Nammalvar, 2019).…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Selective Ethanol Sensor Based on ZnO Nanorod on SnO2 Thin Film Fabricated by Spray Pyrolysis

et al. 2019

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This work reports the fabrication of mixed structure of ZnO nanorod on SnO 2 thin film via spray pyrolysis followed by thermal annealing and their gas sensing properties. ZnO/SnO 2 nanostructures are successfully prepared on a gold interdigitated alumina substrate by spraying varying mixed precursor concentrations of zinc acetate and tin (IV) chloride pentahydrate solutions in ethanol and thermal annealing. The morphology of the nanostructures is controlled by tailoring the Zn:Sn ratio in the precursor solution mixture. Unique ZnO crystals and ZnO nanorods are observed under a field emission scanning electron microscopy (FESEM) when the Zn/Sn ratio in the precursor solution is in between 13:7 and 17:3 after thermal annealing. The fabricated nanostructures are tested for ethanol, methane and hydrogen in air ambient for various gas concentrations ranging from 25 to 400 ppm and the effect of fabrication conditions on the sensitivity and selectivity are studied. Among the nanostructure sensors studied, the film fabricated with molar ratio of Zn/Sn =3:1 shows better sensitivity and selectivity to ethanol due to high sensing surface area of the nanorod. The response to 25 ppm ethanol is found to be as high as 50 at an operating temperature of 400 • C.

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“…In addition, incorporating the nanofiber layer with electrodes within the structure improved the output of electricity by 1 volt [ 199 ]. Andre et al [ 202 ] produced a novel electrospun ceramic nanofiber sensor for detection of very low concentrations of NH 3 (44 ppb in a response time of 17 s) with high accuracy with respect to other nitrogenated compounds from the combination of IN 2 O 3 -reduced graphene solution mixture. Metal oxides fibers are widely used as gas sensing materials due to their electrical, thermal, and mechanical properties.…”

Section: Applications Of Electrospun Nanofiber Compositesmentioning

confidence: 99%

Progress on the Fabrication and Application of Electrospun Nanofiber Composites

et al. 2020

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Nanofibers are one of the most attractive materials in various applications due to their unique properties and promising characteristics for the next generation of materials in the fields of energy, environment, and health. Among the many fabrication methods, electrospinning is one of the most efficient technologies which has brought about remarkable progress in the fabrication of nanofibers with high surface area, high aspect ratio, and porosity features. However, neat nanofibers generally have low mechanical strength, thermal instability, and limited functionalities. Therefore, composite and modified structures of electrospun nanofibers have been developed to improve the advantages of nanofibers and overcome their drawbacks. The combination of electrospinning technology and high-quality nanomaterials via materials science advances as well as new modification techniques have led to the fabrication of composite and modified nanofibers with desired properties for different applications. In this review, we present the recent progress on the fabrication and applications of electrospun nanofiber composites to sketch a progress line for advancements in various categories. Firstly, the different methods for fabrication of composite and modified nanofibers have been investigated. Then, the current innovations of composite nanofibers in environmental, healthcare, and energy fields have been described, and the improvements in each field are explained in detail. The continued growth of composite and modified nanofiber technology reveals its versatile properties that offer alternatives for many of current industrial and domestic issues and applications.

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Enhanced and selective ammonia detection using In2O3/reduced graphene oxide hybrid nanofibers

Cited by 59 publications

References 51 publications

Electrospun Nanofiber Mats with Embedded Non-Sintered TiO2 for Dye-Sensitized Solar Cells (DSSCs)

Electrospun Nanofiber Mats with Embedded Non-Sintered TiO2 for Dye-Sensitized Solar Cells (DSSCs)

Highly Sensitive and Selective Ethanol Sensor Based on ZnO Nanorod on SnO2 Thin Film Fabricated by Spray Pyrolysis

Progress on the Fabrication and Application of Electrospun Nanofiber Composites

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