Amino acid modified combustion synthesis, characterization and investigation of magnetic, optical and photocatalytic properties of Gd2CoMnO6 nanostructures

Mohassel, Reza; Sobhani, Azam; Goudarzi, Mojgan; Salavati‐Niasari, Masoud

doi:10.1016/j.jallcom.2018.04.251

Cited by 22 publications

(4 citation statements)

References 24 publications

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“…To fill this gap, in the present work, the polycrystalline powder of Eu2(SO4)3 has been synthesized and the crystal structure of the sulfate has been determined for the first time. It might be well to point that much research on synthesis of materials for various applications by different methods, including the green chemistry approach, were conducted resently [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63]. However, to provide synthesis of stoichiometric Eu2(SO4)3 compound, the precipitation approach was used in the present study.…”

Section: Introductionmentioning

confidence: 99%

Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups

Denisenko

Aleksandrovsky

Atuchin

et al. 2018

Journal of Industrial and Engineering Chemistry

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Eu2(SO4)3 was synthesized by chemical precipitation method and the crystal structure was determined by Rietveld analysis. The compound crystallizes in monoclinic space group С2/с. In the air environment, Eu2(SO4)3 is stable up to 670°C. The sample of Eu2(SO4)3 was examined by Raman, Fourier-transform infrared absorption and luminescence spectroscopy methods. The low site symmetry of SO4 tetrahedra results in the appearance of the IR inactive ν1 mode around 1000 cm-1 and ν2 modes below 500 cm-1. The band intensities redistribution in the luminescent spectra of Eu 3+ ions is analyzed in terms of the peculiarities of its local environment.

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Section: Introductionmentioning

confidence: 99%

Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups

Denisenko

Aleksandrovsky

Atuchin

et al. 2018

Journal of Industrial and Engineering Chemistry

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“…The agglomerated particles in this compound were most probably due to the fast nucleation rate of grains, which was caused by high temperatures of calcination and sintering. Thus, this caused the grains to become accumulated since there was not enough duration for the grains to separate well from each other [35]. The formation of grains can be confirmed in Figure 4b, where the shape of the top cross-section of a grain (marked with a yellow circle in Figure 4a) formed a hill shape.…”

Section: Resultsmentioning

confidence: 88%

Dielectric, AC Conductivity, and DC Conductivity Behaviours of Sr2CaTeO6 Double Perovskite

Halizan

Mohamed

2022

Materials

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Relatively new double perovskite material, Sr2CaTeO6, has been prepared through conventional solid-state procedures. Structural, dielectric, and optical characteristics of this exquisite solid-state material were analysed in this study. The single-phase monoclinic P21/n structure of this prepared compound was well correlated with the literature review. Good distribution of grain sizes and shapes was observed in the morphological study of this compound. The discussions on its optical and dielectric properties are included in this manuscript. High dielectric real permittivity, low dielectric loss, and good capacitance over a range of temperatures possessed by this compound, as shown in dielectric and electrical modulus studies, indicated good potential values for capacitor applications. The Ro(RgQg)(RgbQgb) circuit fitted well with the impedance and electrical modulus plot of the compound. Its relatively high electrical DC conductivity in grain at high frequencies and its increasing value with the temperature are typical of a semiconductor behaviour. This behaviour might be attributed to the presence of minor oxygen vacancies within its lattice structure and provides a long-range conduction mechanism. A small difference between activation energy and Ea of DC conductivity indicates that the same charge carriers were involved in both grains and the grain boundaries’ long-range conduction. The electrical AC conductivity of this compound was found to contribute to the dielectric loss in grain structure and can be related to Jonscher’s power law. The presence of polarons in this compound was exhibited by non-overlapping small polaron tunnelling (NSPT) and overlapping large polaron tunnelling (OLPT) conduction mechanisms over a range of temperatures. Wide optical band gap and Eopt in the range of 2.6 eV to 3.6 eV were determined by using an indirect and direct allowed mechanism of electrons transitions. These values supported the efficient semiconducting behaviour of the grain in this material and are suitable for applications in the semiconductor industry.

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“…Amino acids with R-group side chains have specific interests because of their chemical activity and electron donor availability to control the particle size distribution and morphology of nanostructure in the solution combustion (SC) process. 28,33 The typical SC process is an exothermic redox-type reaction and leads to the release of a huge amount of gases during the reaction. 30 The reaction of L-alanine showed an eruptive nature with a rapid increase in pressure.…”

Section: Resultsmentioning

confidence: 99%

L-Alanine Supported Autogenous Eruption Combustion Synthesis of Ni/NiO@RuO₂ Heterostructure for Electrochemical Glucose and pH Sensor

Padmanathan¹,

Sasikumar

Thayanithi³

et al. 2023

ECS Sens. Plus

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Safety and quality control are important for long-term storage and preservation of food. Glucose and food pH are the two most common markers for evaluating food quality. Herein, we constructed a Ni/NiO@RuO2 heterostructure-based two-way sensor via a novel eruption combustion pattern using non-conventional amino acid as a propellant. This approach has the unique points of in-situ doping of oxides and the formation of heterojunctions, providing well-developed pores and high surface areas to enhance the material performance. The Ni/NiO@RuO2 heterostructures have been tested as a bi-functional catalyst for glucose and pH sensing. The sensor exhibits a fast response time of < 0.1±0.02 s, a sensitivity of 641.95±0.5 µA mM-1 cm-2 towards glucose with a 0.4±0.08 µM detection limit and a linear response of 0.1 to 5 mM. As a pH sensor, it exhibits an acceptable sensitivity of -41.6 mV/pH with a response time of < 50 s over a pH range of 2-12. Moreover, this bi-functional sensor based on Ni/NiO@RuO2 performs well when applied to a selection of beverage samples. This study provides a new scalable and low-cost approach to fabricating hetero-oxide nanostructures with controllable heterojunctions for various sensor applications.

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Amino acid modified combustion synthesis, characterization and investigation of magnetic, optical and photocatalytic properties of Gd2CoMnO6 nanostructures

Cited by 22 publications

References 24 publications

Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups

Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups

Dielectric, AC Conductivity, and DC Conductivity Behaviours of Sr2CaTeO6 Double Perovskite

L-Alanine Supported Autogenous Eruption Combustion Synthesis of Ni/NiO@RuO₂ Heterostructure for Electrochemical Glucose and pH Sensor

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Amino acid modified combustion synthesis, characterization and investigation of magnetic, optical and photocatalytic properties of Gd2CoMnO6 nanostructures

Cited by 22 publications

References 24 publications

Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups

Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups

Dielectric, AC Conductivity, and DC Conductivity Behaviours of Sr2CaTeO6 Double Perovskite

L-Alanine Supported Autogenous Eruption Combustion Synthesis of Ni/NiO@RuO2 Heterostructure for Electrochemical Glucose and pH Sensor

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L-Alanine Supported Autogenous Eruption Combustion Synthesis of Ni/NiO@RuO₂ Heterostructure for Electrochemical Glucose and pH Sensor