Skip to main content
main-content

Tipp

Weitere Artikel dieser Ausgabe durch Wischen aufrufen

01.02.2021 | Ceramics | Ausgabe 13/2021

Journal of Materials Science 13/2021

Synthesis, characterization and catalytic performance of magnetic La0.7Sr0.3MnO3/α-Fe2O3 with pn heterojunction structure

Zeitschrift:
Journal of Materials Science > Ausgabe 13/2021
Autoren:
Xue-Fang Cao, Pan Yue, Qiu-Rui Wei, Yun-Fei Dang, Si-Qi Zhang, Zhi-Xian Wei, Rong-Zhen Wang
Wichtige Hinweise
Handling Editor: David Cann.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

In this study, a solar-driven photocatalyst La0.7Sr0.3MnO3/α-Fe2O3 (20%) with pn heterojunction structure was synthesized and characterized. The magnetic, photocatalytic properties, Fenton-like action and the synergistic effect of the photocatalysis and Fenton-like on methyl orange (MO) degradation of La0.7Sr0.3MnO3/α-Fe2O3 (20%) were also investigated. Results show that pn heterojunction was formed, and it has considerable photocatalytic properties under ultraviolet light and solar irradiation. More importantly, La0.7Sr0.3MnO3/α-Fe2O3 (20%) also exhibits Fenton-like catalytic performance in the presence of H2O2 and oxalic acid (OA). The main reactive radicals of the La0.7Sr0.3MnO3/α-Fe2O3–H2O2–OA–sunlight system are h+, ·OH and ·O2. The chemical oxygen demand removal rate of MO wastewater in La0.7Sr0.3MnO3/α-Fe2O3 (20%)–H2O2–oxalic acid–sunlight system reached 72.4%; the value was higher than that of the sum of single photocatalysis (34.5%) and Fenton-like-dark system (27.6%), indicating that there is a synergistic effect between the photocatalysis and Fenton-like on MO degradation. In addition, La0.7Sr0.3MnO3/α-Fe2O3 (20%) displays approximately superparamagnetism and has higher saturated magnetization (Ms), low coercive force and residual magnetism. So it can be easily recovered by an external magnetic field and can be reused 6 times. It was anticipated that La0.7Sr0.3MnO3/α-Fe2O3 (20%) with pn heterojunction structure is a stable and reusable solar-light-driven magnetic photocatalyst and has great potential applications for wastewater treatment.

Graphical abstract

The magnetic La0.7Sr0.3MnO3/α-Fe2O3 (20%) with pn heterojunction structure was synthesized and characterized by different methods. The magnetic, photocatalytic properties, Fenton-like action and the synergistic effect of the photocatalysis and Fenton-like on methyl orange (MO) degradation of La0.7Sr0.3MnO3/α-Fe2O3 (20%) were also investigated. It is not only a solar-driven photocatalyst with high efficiency, but also shows excellent Fenton-like catalytic effect. And the photocatalysis and Fenton-like system exhibited synergetic catalytic effect on MO degradation by La0.7Sr0.3MnO3/α-Fe2O3 (20%). Furthermore, near superparamagnetic characteristics of the catalyst make it easy to recycle by the external magnetic field and can be reused for 6 times, suggesting that it is a stable multifunctional catalyst.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 69.000 Bücher
  • über 500 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 50.000 Bücher
  • über 380 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Maschinenbau + Werkstoffe




Testen Sie jetzt 30 Tage kostenlos.

Literatur
Über diesen Artikel

Weitere Artikel der Ausgabe 13/2021

Journal of Materials Science 13/2021 Zur Ausgabe

Premium Partner

    Marktübersichten

    Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen. 

    Bildnachweise