Synthesis, characterization of NdCoO3 perovskite and its uses as humidity sensor

Ateia, Ebtesam E.; Arman, M. M.; Morsy, Mohamed

doi:10.1007/s00339-019-3168-6

Cited by 31 publications

(24 citation statements)

References 44 publications

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“…All the peaks were indexed to the orthorhombic phase (ICDD card no. 89-0551) and well matched with the literature (Ateia et al 2019). The samples NC1 and NC2 exhibited a single phase of orthorhombic phase with a high degree of crystallinity.…”

Section: X-ray Diffraction Technique (Xrd)supporting

confidence: 85%

The decisive factor of hollow spherical network morphology of Nd1-xCexCo1-yCuyO3±δ perovskites towards soot oxidation

et al. 2022

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The perovskites Nd1-xCexCo1-yCuyO3 (x = 0–0.05, y = 0–0.1) have been synthesized using PVP-assisted sol–gel method and applied for soot oxidation reactions. XRD technique reveals the formation of orthorhombic phase with crystal volume of around ~ 214 Å3 and crystal size of ~ 25–40 nm. The interconnected nanoparticles with hollow spherical network morphology of particles are observed for the samples NdCoO3 (NC1) and Nd0.98Ce0.02Co0.95Cu0.05O3 (NC2) with particle sizes of around 300–500 nm. The samples experienced a charge transfer from ligand (O2−) to cobalt cation in UV region (210–260 nm) and also observed broad absorption bands in the visible region (380–600 nm). In addition, the bandgap energy of NC2 showed the lowest value (4.21 eV); as well as surface morphological advantage promoted the transport of surface-chemisorbed oxygen species in the inner and outer surface of catalysts surface due to the reducibility of the catalyst with the soot $$\left( {\frac{{{\text{O}}_{2}^{{{\text{x}} - }} }}{{{\text{O}}_{2}^{{{\text{x}} - }} + {\text{O}}^{2 - } }} = 0.90} \right)$$ O 2 x - O 2 x - + O 2 - = 0.90 . Furthermore, XPS results evidenced the higher content of Co2+ cation upon substitution of Ce/Cu into NC1, which successively formed more amount of Oβ-oxygen species. Remarkably, the perovskite NC2 showed the lowest soot oxidation temperature (T50% = 434 °C) among the investigated perovskites. Besides, the spherically networked morphology of NC2/NC1 samples also decided the soot oxidation process.

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Section: X-ray Diffraction Technique (Xrd)supporting

confidence: 85%

The decisive factor of hollow spherical network morphology of Nd1-xCexCo1-yCuyO3±δ perovskites towards soot oxidation

et al. 2022

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“…These behaviors are due to the nature of the charge carrier that the semiconductor possesses. According to the literature, several semiconductor materials have been proposed for sensing applications, being some of them binary semiconductors (like NiO, CuO, WO 3 , and TiO 2 ) [11], perovskites (BaTiO 3 , NdCoO 3 , and ZnSnO 3 ) [12][13][14], spinels (AlCo 2 O 4 , NiFe 2 O 4 , and MgFe 2 O 4 ) [15][16][17], and trirutiles (MX 2 O 6 where M can be Ni, Co, or Cu and X is replaced by Sb or Ta [18,19], like NiSb 2 O 6 [20], CoTa 2 O 6 [21], and NiTa 2 O 6 [22]). Regardless of the semiconductor material used for the sensor, an electronic circuit with desirable features is required for signal adaptation: low cost, high functionality, fast response, high sensitivity, excellent repeatability, high resolution, and easy construction.…”

Section: Introductionmentioning

confidence: 99%

A Gas Sensor for Application as a Propane Leak Detector

Bonilla

Guillén-Bonilla

Rodríguez-Betancourtt

et al. 2021

Journal of Sensors

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A propane gas detector was built based on the semiconductor nickel antimonate oxide (NiSb2O6) by means of an analog electronic circuit. The gas detector was designed for monitoring atmospheres where the leakage of propane gas could possibly occur. The prototype’s construction methodology is presented in 5 stages: (1) synthesis of NiSb2O6 oxide powders, (2) characterization of the powders by XRD and TEM, (3) manufacture and electrical characterization of the chemical gas sensor, (4) design of the analog circuit based on the electrical response of the gas sensor, and (5) functionality tests. The gas detector was built at low cost and showed excellent functionality. The operating conditions were as follows: 200°C, gas concentration of 5 ppm, electronic circuit gain of 5, and sensor sensitivity of 0.41.

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“…With further increasing in the testing frequency, the impedance variation increases, while at higher frequency (100 kHz) the impedance variation becomes insigni cant with no obvious trend. This could be explained based on the water molecules are not able to be polarized at high frequencies [5], [30].…”

Section: Sensor Fabricationmentioning

confidence: 99%

Evaluate the Humidity Sensing Properties of a CNTs/Co3O4 Nanorods Composite

Wm¹,

Morsy²,

Na³

et al. 2021

Preprint

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For the development of humidity sensors, MWCNTs/Co3O4 nanocomposite has been prepared by precipitation method. in order to evaluate the prepared materials quality both of functionalized MWCNTs and decorated CNTs characterized by X- ray powder diffraction (XRD) ,High resolution transmission electron microscope (HRTEM) Thermal analysis (DTA and TGA) FTIR and finally Raman spectroscopy. Meanwhile the humidity sensing behavior has been also investigated. The proposed composite has been tested in the wide range in relative humidity and tesing frequency. The obtained results confirmed that the optimum testing frequency is 100 Hz. The MWCNTs/Co3O4 nanocomposite exhibited a good sensitivity toward humidity from11% up to 97% RH with reasonable response and recovery time. Also the sensor revealed a low hysteresis and good repeatability with increasing and decreasing of humidity levels.

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Synthesis, characterization of NdCoO3 perovskite and its uses as humidity sensor

Cited by 31 publications

References 44 publications

The decisive factor of hollow spherical network morphology of Nd1-xCexCo1-yCuyO3±δ perovskites towards soot oxidation

The decisive factor of hollow spherical network morphology of Nd1-xCexCo1-yCuyO3±δ perovskites towards soot oxidation

A Gas Sensor for Application as a Propane Leak Detector

Evaluate the Humidity Sensing Properties of a CNTs/Co3O4 Nanorods Composite

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