Structural and catalytic characterization of nanostructured iron manganite

Doroftei, C.; Popa, P.D.; Rezlescu, E.; Rezlescu, N.

doi:10.1016/j.compositesb.2014.07.005

Cited by 15 publications

(7 citation statements)

References 20 publications

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“…Systematic studies of a big number of oxide compounds have proved that the catalytic activity represents a common phenomenon for the oxide compounds, perovskites included [17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Recent specialized literature reports on a series of perovskites used for catalysts realization.…”

Section: Reports From the Specialized Literature On A Series Of Perovmentioning

confidence: 99%

Nanostructured Perovskites for Catalytic Combustion

Doroftei¹

2019

Nanostructures in Energy Generation, Transmission and Storage

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Until recently, for reducing the environment pollution, the combustion catalysts based on noble metals was considered the most active, practically irreplaceable. Their high cost, high thermal instability, high sensitivity to deactivation and to the attack of some harmful elements or compounds determine the intensification of studies to replace them with new cheaper and stable catalysts. Numerous experimental data from literature indicate that the semiconductive oxidic compounds can compete with combustion catalysts based on noble metals from catalytic activity standpoint. Recent studies led to the realization of remarkable catalytic activity at moderate (350-600°C) and high (over 600°C) temperatures at some oxidic perovskite compounds, which contain transition metals. In this study are presented a series of nanostructured oxidic compounds with perovskite structure, based on transition metals and synthesized by the precursor method of self-combustion, using polyvinyl alcohol as colloidal medium, for catalytic combustion of some volatile organic compounds at low (50-350°C) and moderate temperatures. The catalytic activity of the perovskite compounds in the total oxidation reactions of the gases is largely determined by the amount of weakly bound surface oxygen species which in turn depends on the presence of oxygen vacancies.

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Section: Reports From the Specialized Literature On A Series Of Perovmentioning

confidence: 99%

Nanostructured Perovskites for Catalytic Combustion

Doroftei¹

2019

Nanostructures in Energy Generation, Transmission and Storage

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“…The method presented here, named sol-gel self-combustion [40][41][42][43][44][45], accomplishes the homogenization at the molecular level by introducing compounds in the form of nitrates solutions in a colloidal medium (Figure 1). With a view to limit the dimensions of hydroxide particles to a nanometer level and to avoid the flocculation phenomenon, the co-precipitation reaction does not occur in a simple aqueous solution, but in a colloidal solution.…”

Section: Obtaining Nanomaterials By the Sol-gel Self-combustion Methodsmentioning

confidence: 99%

Nanostructured Oxide Semiconductor Compounds with Possible Applications for Gas Sensors

Doroftei¹,

Leontie²

2018

New Uses of Micro and Nanomaterials

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Nanostructured oxide semiconductor compounds have gained a big importance, in basic and mostly in applicative researches, due to their unique properties, and their increased potential of utilization as sensors in various electronic and optoelectronic devices. The development of devices based on semiconductor materials as gas sensors has been visible during the recent years, due to their low manufacturing cost. Because the basic materials and the manufacturing processes are critical for gas sensors high performance, they need to be studied and capitalized in practice. Among the new technologies, the production of nanocrystalline materials and hybrid structures offer huge opportunities to improve sensitivity, selectivity and response time, as a consequence of the intensification of gas-sensor interaction. In this study, a series of nanostructured oxide semiconductor compounds with a spinel-type structure and perovskite, respectively, based on transition metals and synthesized by the sol-gel self-combustion method, with possible applications for resistive gas sensors, are presented.

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“…Iron manganite (FeMnO 3 , FMO) is a mixed perovskite material with the chemical formula ABO 3 , where the Fe atom is placed at the center of a cube formed by eight corner-sharing MnO 6 octahedra ( Habibi and Mosavi, 2017 ). FeMnO 3 has been examined for applications such as lithium-ion batteries, catalysis, humidity sensors, energy storage and antibacterial devices ( Doroftei et al, 2014 ; Cao et al, 2016 ; Cetin et al, 2019 ; Vasiljevic et al, 2020a ; Nikolic et al, 2020 ). A large number of synthesis methods, such as co-precipitation, hydrothermal, ball milling, solid state reaction and sol-gel chemistry, have all been employed for the fabrication of FeMnO 3 materials ( Sundari et al, 2013 ; Doroftei et al, 2014 ; Cao et al, 2016 ; Soni and Pal, 2016 ; Bin et al, 2017 ; Mungse et al, 2017 ; Gowreesan and Ruban Kumar, 2017 ; Saravanakumar et al, 2018 ; Cetin et al, 2019 ; Fix, 2019 ; Lobo and Rubankumar, 2019 ; Vasiljevic et al, 2020a ; Nikolic et al, 2020 ; Vasiljevic et al, 2020b ).…”

Section: Introductionmentioning

confidence: 99%

All-Inorganic p−n Heterojunction Solar Cells by Solution Combustion Synthesis Using N-type FeMnO3 Perovskite Photoactive Layer

et al. 2021

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This study outlines the synthesis and physicochemical characteristics of a solution-processable iron manganite (FeMnO3) nanoparticles via a chemical combustion method using tartaric acid as a fuel whilst demonstrating the performance of this material as a n-type photoactive layer in all-oxide solar cells. It is shown that the solution combustion synthesis (SCS) method enables the formation of pure crystal phase FeMnO3 with controllable particle size. XRD pattern and morphology images from TEM confirm the purity of FeMnO3 phase and the relatively small crystallite size (∼13 nm), firstly reported in the literature. Moreover, to assemble a network of connected FeMnO3 nanoparticles, β-alanine was used as a capping agent and dimethylformamide (DMF) as a polar aprotic solvent for the colloidal dispersion of FeMnO3 NPs. This procedure yields a ∼500 nm thick FeMnO3 n-type photoactive layer. The proposed method is crucial to obtain functional solution processed NiO/FeMnO3 heterojunction inorganic photovoltaics. Photovoltaic performance and solar cell device limitations of the NiO/FeMnO3-based heterojunction solar cells are presented.

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Structural and catalytic characterization of nanostructured iron manganite

Cited by 15 publications

References 20 publications

Nanostructured Perovskites for Catalytic Combustion

Nanostructured Perovskites for Catalytic Combustion

Nanostructured Oxide Semiconductor Compounds with Possible Applications for Gas Sensors

All-Inorganic p−n Heterojunction Solar Cells by Solution Combustion Synthesis Using N-type FeMnO3 Perovskite Photoactive Layer

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