Structural Properties and Catalytic Activity of Sr-Substituted LaFeO3 Perovskite

Zhang, Xiaojing; Li, Huaju; Li, Yong; Shen, Wenjie

doi:10.1016/s1872-2067(11)60388-4

Cited by 47 publications

(14 citation statements)

References 32 publications

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“…It was also observed that increase in Sr 2+ doping concentration caused the diffraction peak intensity to abate. However, it still maintained its orthogonal structure with little or no modifications in the symmetry of crystal structure [3,4]. Fig.…”

Section: Xrd Analysismentioning

confidence: 98%

“…Interestingly, as the Fe 4+ proportion of the compound increases, the number of covalent interactions between Fe and O ions increase. This further enhances atomic orbital overlapping between Fe-O, thereby causing decrease in the cell volume [4]. Another factor that is known to affect cell volume is the oxygen content of the compound [12,13].…”

Section: Xrd Analysismentioning

confidence: 99%

“…Perovskite-type (ABO3) rare-earth metal oxide [1,2] is a kind of new inorganic non-metal material that possesses unique physical and chemical properties. Lanthanum ferrite composite oxide nanopowder (LaFeO3) are nanoscale particles of a material [3,4], which possess unique magnetic, optical and electrical properties, that can be attributed to the congregation of multifactorial effects, such as small size effect, surface effect [5,6]. The properties of these nanoparticles may sometimes vary from the macro-scale material itself [7,8].…”

Section: Introduction mentioning

confidence: 99%

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Microstructure and Magnetic Studies of La1-xSrxFeO3 Nano Particles Fabricated by the Citrate Sol-Gel Method

Yang¹,

Yang²,

Lin³

et al. 2019

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The paper reports the use the sol-gel auto-combustion method for the preparation of nanocrystalline La1-xSrxFeO3 (x = 0¸0.7). The physical and chemical properties, microstructure, morphology and magnetic properties of the particles thus formed were studied. The X-ray diffraction (XRD) results indicated that Sr2+ instead of perovskite La are attributed to the lattice forming solid solution La1-xSrxFeO3, which has single orthogonal perovskite structure, space group Pnma, and does not show any impurity peaks. Fourier-transform infrared (FT-IR) spectroscopy confirmed the presence of Fe-O-Fe bond antisymmetric stretching vibration of FeO6 regular octahedron. The scanning electron microscope (SEM) analysis showed that introduction of Sr2+ ions can inhibit the growth of size of the particles thereby forming particles with spherical shape and better dispersion properties. The magnetic properties of the sample showed that with increase in Sr2+ ion concentration leads to increase in sample’s magnetism. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19455

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Section: Xrd Analysismentioning

confidence: 98%

Section: Xrd Analysismentioning

confidence: 99%

Section: Introduction mentioning

confidence: 99%

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Microstructure and Magnetic Studies of La1-xSrxFeO3 Nano Particles Fabricated by the Citrate Sol-Gel Method

Yang¹,

Yang²,

Lin³

et al. 2019

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“…Zhang et al investigated Sr modified LaFeO 3 and its structural and catalytic activity. La 0.8 Sr 0.2 FeO 3 contributed significantly enhanced activity in methane combustion and CO oxidation because the oxygen vacancies accelerated the dissociation of gaseous oxygen on the surface in CO oxidation and facilitated the diffusion of lattice oxygen from the bulk to the surface during CH 4 combustion [107]. The perovskite LaAlO 3 was manufactured using the co-precipitation method by Haron et al The structural and efficiency of removal of heavy metal (Cd 2+ and Pb 2+ ) were extremely investigated by them.…”

Section: Heavy Metals From Contaminated Watermentioning

confidence: 99%

Lead-Free Perovskite Nanocomposites: An Aspect for Environmental Application

De¹

2021

Perovskite and Piezoelectric Materials

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Perovskites possess an interesting crystal structure and its structural properties allow us to achieve various applications. Beside its ferroelectric, piezoelectric, magnetic, multiferroic, etc., properties, these branches of materials are also useful to develop materials for various environmental applications. As the population is increasing nowadays, different type of environmental pollution is one of the growing worries for society. The effort of researchers and scientists focuses on developing new materials to get rid of these individual issues. With modern advances in synthesis methods, including the preparation of perovskite nanocomposites, there is a growing interest in perovskite-type materials for environmental application. Basically, this chapter concludes with a few of the major issues in the recent environment: green energy (solar cell), fuel cell, sensors (gas and for biomedical), and remediation of heavy metals from industrial wastewater.

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“…For ferrite perovskite the oxygen mobility was evidenced as a crucial parameter. For example, substitution of La 3+ by Sr 2+ induces a generation of oxygen vacancies favoring the diffusion of lattice oxygen from the bulk to the surface and decreases significantly the T50 to lower temperature [104]. The increasing of oxygen transport…”

Section: Perovskite Catalystsmentioning

confidence: 99%

Transition metal oxides for combustion and depollution processes

Bion¹,

Can²,

Courtois³

et al. 2018

Metal Oxides in Heterogeneous Catalysis

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Transition metal oxides (M = Mn, Co, Fe, Ni,…) are potential catalysts for application in combustion and depollution processes. Owing to huge improvements in their preparation, perovskites, spinels, hexaaaluminates and some other oxide structures can replace noble metals in a number of processes. In this chapter, the most recent advances in the use of oxides for total oxidation (CO, methane, COV, wet air oxidation) and for the treatment of nitrogen compounds (NOx, NH3, urea) will be reviewed. In every case, the most probable mechanism (Langmuir-Hinshelwood, Eley-Rideal, Mars-van Krevelen,…) and the nature of active sites (M n+ /M n+1 ion pairs, acid-base sites,…) as well as the role of reactive oxygen species will be examined in the light of recent results and up-to-date concepts. Finally the outstanding progresses in the oxide synthesis allow to apply these concepts to the development of extremely active and more stable catalysts.

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Structural Properties and Catalytic Activity of Sr-Substituted LaFeO3 Perovskite

Cited by 47 publications

References 32 publications

Microstructure and Magnetic Studies of La1-xSrxFeO3 Nano Particles Fabricated by the Citrate Sol-Gel Method

Microstructure and Magnetic Studies of La1-xSrxFeO3 Nano Particles Fabricated by the Citrate Sol-Gel Method

Lead-Free Perovskite Nanocomposites: An Aspect for Environmental Application

Transition metal oxides for combustion and depollution processes

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