Study on the catalytic performance of LaMnO3 for the RhB degradation

Luo, Hongdi; Guo, Juan; Shen, Ting; Zhou, Houren; Liang, Juan; Yuan, Shandong

doi:10.1016/j.jtice.2020.01.011

Cited by 77 publications

(21 citation statements)

References 42 publications

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“…50-0298 corresponding to a rhombohedral structure with R% 3c space group. 34 LaMnO 3 is clearly distinguished from LaFeO 3 and LaFe 0.9 Mn 0.1 O 3 by its characteristic rhombohedral splitting at 2y angles of 32.31 and 32.51 with (110) and (104) planes observed in LaMnO 3 as displayed in the bottom of Fig. 2.…”

Section: Structural Studiesmentioning

confidence: 90%

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Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO₃, LaFe_0.9Mn_0.1O₃, and LaMnO₃ perovskites

Lakshmi

Bera

Hiremath

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Structural Studiesmentioning

confidence: 90%

“…Intense Mn 2p 3/2,1/2 peaks at 641.6 and 653.3 eV having 11.7 eV spin-orbit separation in LaMnO 3 are associated with Mn 3+ species in the materials. 34,41 Other spin-orbit component peaks at 643.8 and 655.8 eV are attributed to the Mn 4+ species. A similar trend is observed in the LaFe 0.9 Mn 0.1 O 3 sample.…”

Section: Xps Studiesmentioning

confidence: 99%

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO₃, LaFe_0.9Mn_0.1O₃, and LaMnO₃ perovskites

Lakshmi

Bera

Hiremath

et al. 2022

Phys. Chem. Chem. Phys.

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“…Therefore, MO degrades faster than the MB dye pollutant. Now, in the case of RhB dye, the faster degradation may be attributed to the negatively charged carboxylic acid group present, which could be easily attracted to the positively charged catalyst at low pH …”

Section: Resultsmentioning

confidence: 99%

“…The Mn 3+ /Mn 4+ are the active ions participating in the degradation of the RhB dye by LaMnO 3 under strong acidic conditions. 57 , 58 Also, the pH pzc of the Sr 2 LaFeMnO 7 sample was determined from the plot of point of zero charge given in Figure 15 , and its value comes to be 7.25, which is considered to be the net neutral charge at this pH. So, it is concluded that the surface of the catalyst would have a net positive charge below 7.25 and a net negative charge at pH greater than 7.25.…”

Section: Resultsmentioning

confidence: 99%

New Rare Earth-Doped Bilayered Perovskite Oxide Photocatalysts Sr₂La_0.5R_0.5FeMnO₇ (R = La, Nd, Sm, Gd, Dy) for the Degradation of Highly Toxic Methylene Blue Dye in Wastewater under Visible Light: Structural, Optical, and Magnetic Properties

et al. 2023

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This paper presents the rare earth doping effect on the structural, optical, and magnetic properties of bilayered Ruddlesden–Popper oxides Sr 2 La 0.5 R 0.5 FeMnO 7 (R = La, Nd, Sm, Gd, Dy). Moreover, we are reporting for the first time a new rare earth-doped bilayered perovskite oxide series for the highly toxic methylene blue dye degradation in wastewater under visible light. Structural analysis of the PXRD data using the Rietveld refinements confirms the formation of the phases in tetragonal symmetry with the I 4/ mmm space group. The unit cell lattice parameters ( a & c ) and the cell volume ( V ) decrease monotonically from La- to Dy-doped samples owing to the decrease in the lanthanide ionic radii. The X-ray photoelectron spectroscopy analysis indicates the existence of the Mn ions in the mixed valence state. The DRS study shows that the energy band gap value decreases on moving from La to Gd substitution; however, it further increases for the Dy-doped sample. The magnetic measurements reveal that all the phases exhibit dominant anti-ferromagnetic interactions with Neel temperature ( T N ) observed at 150, 147, 138, 113, and 117 K for La-, Nd-, Sm-, Gd-, and Dy-substituted phases, respectively. However, the presence of an unsaturated hysteresis loop observed in the isothermal magnetic field ( H ) vs magnetization ( M ) plot also indicates the existence of weak ferromagnetic interactions. The investigation of the photocatalytic activity of the synthesized samples was done by carrying out photo-oxidative degradation of methylene blue (MB) dye pollutants. The results show that the photodegradation enhances by doping with heavier rare earth ions with the exception of the Dy-doped sample. The Gd-doped catalyst shows the maximum degradation efficiency of 99.03% in 50 min under visible light irradiation. The scavenging experiments confirmed that the · OH was the main/dominant oxidizing agent involved in the degradation of the MB dye.

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“…The e ciency of LaMnO 3 material relies on the synthesis techniques [26] such as solid-state reaction [27], combustion synthesis [28], hydrothermal synthesis [29], sonochemical synthesis [30], coprecipitation method [31], EDTA glycine process [32], core-shell [33], nanowires [34] and sol-gel [16,35]. In recent years, studies on LaMnO 3 synthesis have been launched using different precursors and several synthesis techniques in order to be applied for alternative realms of use.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterizations of LaMnO3 Perovskite Powders Using Sol-Gel Method 

Özkan

Türk

Çelik

2021

Preprint

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The present research demonstrates the synthesis and characterization of LaMnO3 perovskite powders using the sol-gel technique for dye-sensitive solar cell applications. With this respect, transparent solutions were prepared from La and Mn based precursors, distilled water and citric acid monohydrate. Ammonium hydroxide was incorporated into the La-Mn solution in order to neutralize/precipitate at 24oC for 1 hour in the air. The solution was allowed to evaporate on a hot plate device at 90 °C in the air. The obtained solutions were dried at 90 oC for 24 hours to form a xerogel structure, dried at 200 oC for 2 hours and consequently annealed at 500 and 850 oC for 2 hours in the air. Thermal, structural, microstructural, optical and magnetic properties of the powders were characterized through differential thermal analysis-thermogravimetry (DTA-TG), Fourier transform infrared (FTIR), X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), scanning electron microscopy (SEM), Malvern zeta sizer (PSD), UV-vis spectrometer and vibrating sample magnetometer (VSM). The obtained results indicate promise, especially the low band range, that LaMnO3 powders can be used in dye-sensitized solar cells and can positively affect performance and efficiency.

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Study on the catalytic performance of LaMnO3 for the RhB degradation

Cited by 77 publications

References 42 publications

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO₃, LaFe_0.9Mn_0.1O₃, and LaMnO₃ perovskites

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO₃, LaFe_0.9Mn_0.1O₃, and LaMnO₃ perovskites

New Rare Earth-Doped Bilayered Perovskite Oxide Photocatalysts Sr₂La_0.5R_0.5FeMnO₇ (R = La, Nd, Sm, Gd, Dy) for the Degradation of Highly Toxic Methylene Blue Dye in Wastewater under Visible Light: Structural, Optical, and Magnetic Properties

Synthesis and Characterizations of LaMnO3 Perovskite Powders Using Sol-Gel Method

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Study on the catalytic performance of LaMnO3 for the RhB degradation

Cited by 77 publications

References 42 publications

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO3, LaFe0.9Mn0.1O3, and LaMnO3 perovskites

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO3, LaFe0.9Mn0.1O3, and LaMnO3 perovskites

New Rare Earth-Doped Bilayered Perovskite Oxide Photocatalysts Sr2La0.5R0.5FeMnO7 (R = La, Nd, Sm, Gd, Dy) for the Degradation of Highly Toxic Methylene Blue Dye in Wastewater under Visible Light: Structural, Optical, and Magnetic Properties

Synthesis and Characterizations of LaMnO3 Perovskite Powders Using Sol-Gel&nbsp;Method&nbsp;

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Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO₃, LaFe_0.9Mn_0.1O₃, and LaMnO₃ perovskites

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO₃, LaFe_0.9Mn_0.1O₃, and LaMnO₃ perovskites

New Rare Earth-Doped Bilayered Perovskite Oxide Photocatalysts Sr₂La_0.5R_0.5FeMnO₇ (R = La, Nd, Sm, Gd, Dy) for the Degradation of Highly Toxic Methylene Blue Dye in Wastewater under Visible Light: Structural, Optical, and Magnetic Properties

Synthesis and Characterizations of LaMnO3 Perovskite Powders Using Sol-Gel Method