Electrical Impedance of V2O5/POMA Hybrid Film Deposited by Casting for Application in Ammonia Gas Sensor

Diniz, M.O.; Coelho, R.; Bianchi, Rodrigo Fernando; Guerra, Elídia Maria

doi:10.1007/s11664-020-08587-9

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…Consequently, V 2 O 5 is found in several studies being a sensing material for several gas, such as, ammonia, ethanol, pH-sensor, EGFET pH-sensor, phenylhydrazine, NO 2 , H 2 O 2 and among others. In all cases, V 2 O 5 demonstrated to be highly sensitivity in several temperature and under both dark and illumination conditions [18,[39][40][41][42][43][44][45][46][47]. Similar to the sensor, a biossensor turn an analytical response into a measurable chemical signal and detects only a certain biological product as a target analyte.…”

Section: Properties and Applicationsmentioning

confidence: 99%

Vanadium Pentoxide (V₂O₅): Their Obtaining Methods and Wide Applications

Cestarolli¹,

Guerra²

2021

Transition Metal Compounds - Synthesis, Properties, and Application

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The first synthesis of pentoxide vanadium (V2O5) as gel completed 135 years in 2020. Since its first synthesis, the V2O5 has attracted attention over the years in different areas in science and technology. There are several possibilities to obtain V2O5 resulting in different structures. Among these methods, it is possible to mention the sol–gel, hydrothermal/solvothermal synthesis, electrospinning, chemical vapor deposition (CVD), physical vapor deposition (PVD), template-based methods, reverse micelle techniques, Pechini method and electrochemical deposition that can be considered as the great asset for its varied structures and properties. Progress towards obtaining of different structures of V2O5, and phases have been resulted in lamellar structure with wide interlayer spacing, good chemical and thermal stability and thermoelectric and electrochromic properties. Throughout this advancement, its performance for industrial applications have made a strong candidate in electrochromic devices, photovoltaic cell, reversible cathode materials for Li batteries, supercapacitor, among others. This chapter will be to assist an updated review since the first synthesis up to current development.

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Section: Properties and Applicationsmentioning

confidence: 99%

Vanadium Pentoxide (V₂O₅): Their Obtaining Methods and Wide Applications

Cestarolli¹,

Guerra²

2021

Transition Metal Compounds - Synthesis, Properties, and Application

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“…In what pertains to polymers, composites containing polyethylene oxide (PEO) continue to be widely studied; however, the use of conducting polymers such as polyaniline (PANI) and polypyrrole (PPy) can also be highlighted [11][12][13]. Displaying structural and physicochemical properties similar to PANI, poly(o-methoxyaniline) (POMA) is an "Intrinsically Conducting Polymer" (ICP) employed in several technological applications, including electromagnetic shielding in the microwave range [14], manufacture of films for electroluminescent devices [15], as well as in hybrid and composite films for ammonia gas sensors (NH 3 ) [16,17]. Moreover, POMA can also be found in nanocomposites for applications in electrochemical supercapacitors [18], dye-sensitized solar-cell electrodes [19], composites containing carbon nanotubes or graphene [20], and deoxyribonucleic acid (DNA) for biosensors [21].…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of the Electrical Properties of Na2Ti3O7/Na2Ti6O13/POMA Composites

Costa

Silva²,

Biondo³

et al. 2022

Molecules

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The temperature dependence of the electrical properties of composites formed by biphasic sodium titanate and poly(o-methoxyaniline) (Na2Ti3O7/Na2Ti6O13/POMA) with different concentrations of POMA (0%, 1%, 10%, 15%, 35% and 50%) in the ceramic matrix was determined from measurements of complex impedance. The structural details were studied by means of X-ray diffraction, confirming the formation of the Na2Ti3O7/Na2Ti6O13/POMA composites. The displacement of the (200) reflection from 2θ = 10.45° to 11.15° in the composites with 10 and 15% of POMA suggested the partial replacement of H+ for Na+ in the Na2Ti3O7 structure. The thermal properties were investigated by Thermogravimetry and Differential Thermal Analysis. The Thermogravimetry curves of the composites with POMA content of 1, 10 and 15% presented profiles similar to that of pure sodium titanate sample. The composites with 35 and 50% of POMA showed a process at temperatures around 60–70 °C, which was associated with water absorbed by the polymer. The analysis of the complex impedance spectroscopy measurements revealed that the electrical resistivity of the composites in the range from 0 to 35% increased by two orders of magnitude, with different values for each concentration. This positive temperature coefficient of resistivity was less noticeable in the composite with highest POMA mass content (50%). The rapid increase in resistivity caused an increase in the relaxation time calculated from the time domain. The electrical response of the 50% of POMA compound changes in relation to what was observed in the other compounds, which suggests that there is a saturation limit in the increase in resistivity with POMA content.

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Fabrication and electrical surface characterization of pellets of V2O5 nanostructures for robust and portable gas sensor applications

et al. 2023

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Electrical Impedance of V2O5/POMA Hybrid Film Deposited by Casting for Application in Ammonia Gas Sensor

Cited by 7 publications

References 12 publications

Vanadium Pentoxide (V₂O₅): Their Obtaining Methods and Wide Applications

Vanadium Pentoxide (V₂O₅): Their Obtaining Methods and Wide Applications

Temperature Dependence of the Electrical Properties of Na2Ti3O7/Na2Ti6O13/POMA Composites

Fabrication and electrical surface characterization of pellets of V2O5 nanostructures for robust and portable gas sensor applications

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Electrical Impedance of V2O5/POMA Hybrid Film Deposited by Casting for Application in Ammonia Gas Sensor

Cited by 7 publications

References 12 publications

Vanadium Pentoxide (V2O5): Their Obtaining Methods and Wide Applications

Vanadium Pentoxide (V2O5): Their Obtaining Methods and Wide Applications

Temperature Dependence of the Electrical Properties of Na2Ti3O7/Na2Ti6O13/POMA Composites

Fabrication and electrical surface characterization of pellets of V2O5 nanostructures for robust and portable gas sensor applications

Contact Info

Product

Resources

About

Vanadium Pentoxide (V₂O₅): Their Obtaining Methods and Wide Applications

Vanadium Pentoxide (V₂O₅): Their Obtaining Methods and Wide Applications