Synthesis of novel perovskite crystal structure phase of strontium doped rare earth manganites using sol gel method

Abdel-Latif, I.A.; Ismail, Adel A.; Bouzid, Houcine; Al‐Hajry, A.

doi:10.1016/j.jmmm.2015.05.078

Cited by 31 publications

(6 citation statements)

References 40 publications

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“…Meanwhile, PEG molecules lose their bonding water during aging process to produce free PEG molecules, which can be easily adsorbed onto the surface of the formed metal hydroxides-citrate complex to generate tightly ''metal hydroxides-citrate-PEG'' complexes [38]. Moreover, PEG can enhance the growth kinetic of colloids and then eventually produces an anisotropic growth of the perovskites [39].…”

Section: Formation Mechanism Of Perovskite Materialsmentioning

confidence: 99%

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Chen

Zhao

et al. 2017

Applied Catalysis B: Environmental

115

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ABO 3-type perovskites (A=La, Ce, Sm; B=Cr, Mn, Fe, Co, Ni) were systematically fabricated via a facile soft-templated sol-gel with post-calcination method through a complexation-carbonation-oxidation process, which were successfully applied in the visible-light-driven photothermocatalytic degradation of volatile organic compounds (VOCs) for the first time. Preliminary characterization results revealed the lower impact to the oxidative performance and visible-light-absorption properties of ANiO 3 than LaBO 3 , while the latter ones should present more attractive promotion of catalytic performance toward VOC degradation. Subsequently catalytic degradation of VOCs using gaseous styrene as model compound confirmed that all LaBO 3-type perovskites possessed both high visible-light-driven photocatalytic and temperature-induced thermocatalytic activities. Meanwhile, synergetic effect between photocatalysis and thermocatalysis activities of different position B substituted LaBO 3 resulted in different enhancement of their photothermocatalytic activities, where the highest synergistic factor (3.53) was obtained for LaMnO 3 at 140 o C. Besides, the synergetic effect could also effectively preserve the activity of the perovskite catalysts (eg. LaMnO 3) that almost the same removal efficiency (ca. 96.6% within 40 min) was obtained to styrene (initial concentration of 40 ppmv) after five continuous cycling tests. The highly and stably photothermocatalytic activity of these perovskites were attributed to the coefficient effect of the small crystal size and narrower bandgap as well as high visible light absorption and reducibility. This work could provide an efficient and practical way to utilize the total energy of sun for the remediation of atmospheric environment pollutions.

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Section: Formation Mechanism Of Perovskite Materialsmentioning

confidence: 99%

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Chen

Zhao

et al. 2017

Applied Catalysis B: Environmental

115

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“…The smaller the d, the smaller the unit cell parameters, corresponding to the decreasing trend of the volume in Table 1. The reason for the decrease may be that the substitution of Sr will cause the change of the size of the A site and the change of the valence state of Mn , although the Sr 2+ ionic radius (0.118nm) is close to La 3+ ionic radius (0.1032nm) , with the increase of Sr substitution amount x, in order to maintain the electrical neutrality of the whole compound [2] , B-site Mn 3+ (ionic radius 0.0645nm) is oxidized Mn 4+ (ionic radius 0.0530nm) is formed, and the content of Mn 4+ increases, the covalency between Mn and O ions increases, and the atomic orbitals between Mn -O overlap more, resulting in a decrease in the unit cell volume [4] . Another factor that affects the unit cell volume is the oxygen content in the compound.…”

Section: Xrd Analysismentioning

confidence: 99%

“…Von Perovski. Since then, the perovskite material with this structural feature has been and its structure began to enter the stage of scientific research [1][2] . The basic chemical formula of the perovskite material is ABO3 , and its space group is Pm3m [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Structure-magnetic and Morphology Properties of La1-xSrxMnO3 Nanomaterials by sol-gel

2023

compne

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In this paper, perovskite La1-xSrxMnO3 powder was successfully prepared by Sol-gel method. The effects of different doping amount, different pH value , different calcination temperature and different calcination time on the structure and magnetic properties of La1-xSrxMnO3 material were studied by XRD, SEM, FT-IR and VSM. When the doping amount is x≥0.3, the XRD shows that the sample is the perovskite material with cubic structure, and the doping amount is x=0.3, the SEM shows that the sample has a better particle morphology. The analysis of different pH values shows that the sample La0.7Sr0.3MnO3 has the maximum specific saturation magnetization of 62.42 emu/g and the maximum coercivity of 66.87 Oe at pH=7. The analysis of different calcination temperatures shows that the sample La0.7Sr0.3MnO3 has the maximum specific saturation magnetization of 62.42 emu/g and the maximum coercivity of 66.87 Oe, the calcination temperature is 1000℃. Different calcination time has little effect on the specific saturation magnetization and coercivity of the sample La0.7Sr0.3MnO3 , but it shows a decreasing trend. When the calcination time is 2h, it has the largest specific saturation magnetization and coercivity.

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“…Nowadays the capacity of storage is on the range of terabytes (TB) and let us to see how data and information are encoded or stored in the direction of magnetization; (in small areas of a magnetic medium) as we will see later in this work. The structural of perovskite and transport properties were investigated intensively in the last few decades [29][30][31][32][33][34][35][36][37][38][39]. These compounds are crystallized with the different crystal structure, where they have the cubic [40][41][42][43], orthorhombic [44][45][46][47][48][49][50][51][52][53], hexagonal [54][55][56][57][58], rhombohedral [59-64], monoclinic [66-70] crystal system.…”

Section: Application Of Multiferroicsmentioning

confidence: 99%

Multiferroics Materials, Future of Spintronics

Abdel-Latif

2019

Engineering Magnetic, Dielectric and Microwave Properties of Ceramics and Alloys

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Multiferroic materials are a class of new materials where there is a combination between the ferro/antiferroelectricity, the ferro/antiferromagnetism, and the ferro/antiferroelasticity. The most important applications of these materials are their use in spintronics. Progress in developing new materials with new properties suitable for storage media and spin valve transistors is an important step in the field of magnetic materials and their applications. Magnetoresistive random access memory MRAM is one of the applications of the multiferroics materials. In the present chapter, highlights will be focused on the basic concepts of multiferroics science, technology and applications.

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Synthesis of novel perovskite crystal structure phase of strontium doped rare earth manganites using sol gel method

Cited by 31 publications

References 40 publications

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Structure-magnetic and Morphology Properties of La1-xSrxMnO3 Nanomaterials by sol-gel

Multiferroics Materials, Future of Spintronics

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