Structure, magnetic, and photocatalysis of La0.7Sr0.3MO3 (M = Mn, Co, and Fe) perovskite nanoparticles: Novel photocatalytic materials

Mohamed H Ghozza; Ibrahim S Yahia; Mai S A Hussien

doi:10.1007/s11356-023-26411-9

Structure, magnetic, and photocatalysis of La_0.7Sr_0.3MO₃ (M = Mn, Co, and Fe) perovskite nanoparticles: Novel photocatalytic materials

Environ Sci Pollut Res Int. 2023 May;30(21):61106-61122. doi: 10.1007/s11356-023-26411-9. Epub 2023 Apr 13.

Authors

Mohamed H Ghozza¹, Ibrahim S Yahia^{2

3}, Mai S A Hussien^{4

5

6}

Affiliations

¹ Basic Science Department, Marg High Institute of Engineering and Modern Technology, Cairo, Egypt.
² Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Physics Department, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt.
³ Green Research Laboratory (GRL), Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt.
⁴ Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Physics Department, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt. maisalehamar@gmail.com.
⁵ Green Research Laboratory (GRL), Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt. maisalehamar@gmail.com.
⁶ Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt. maisalehamar@gmail.com.

Abstract

The present study, La_0.7Sr_0.3MO₃ (M = Mn-, Co-, and Fe-), perovskite, has successfully been synthesized via co-precipitation and sol-gel auto-combustion. XRD, SEM, and EDX characterized the prepared samples. XRD and SEM showed that the as-prepared La_0.7Sr_0.3MnO₃ and La_0.7Sr_0.3CoO₃ have multiphase. La_0.7Sr_0.3FeO₃, in comparison, is nanosized, has a single-phase perovskite, and has a rather homogenous particle size distribution. Additionally, EDX mapping analysis shows that all pieces are distributed uniformly. According to X-ray diffractometer results, all calcined powders contain 100% LSF, more than 15% perovskite phase of LSC, 47% LSM, and other secondary phases, such as cobalt oxide. Aِt room temperature and magnetic field of ± 20 kG, La_0.7Sr_0.3MnO₃ exhibited weak ferromagnetic behavior in a low magnetic field, whereas diamagnetic behavior was seen in a high magnetic field. La_0.7Sr_0.3FeO₃ samples behave as strong ferromagnetic. On the contrary, the photodegradation of La_0.7Sr_0.3MnO₃ is 99% compared to 75% and 91% for other samples under UVC lights of wavelength = 254 nm. The degradation rate for La_0.7Sr_0.3MnO₃ is 0.179 higher, about 3.25 and 2.23, than the other samples. A La_0.7Sr_0.3MnO₃ nanocomposite performs as a photocatalyst to enhance the efficiency of methylene blue photodegradation. This study boosts good UVC photocatalysts with high efficiency for different kinds of dyes. Hence, the catalyst possessed high stability and efficiency for continuous wastewater treatment.

Keywords: And Fe); Co; Hysteresis/magnetization; La0.7Sr0.3MO3 (M = Mn; Nanoscale perovskites; Photocatalysis process; Sol–gel/auto combustion/co-precipitation methods; XRD/SEM.

MeSH terms

Magnetic Fields
Magnetics
Nanoparticles* / chemistry
Nanostructures* / chemistry

Substances

perovskite

Grants and funding

37226/Programme Grants for Applied Research