Cu-substituted lanthanum ferrite perovskites: Preparation, characterization and photocatalytic activity in gas-solid regime under simulated solar light irradiation

JOURNAL OF ALLOYS AND COMPOUNDS

卷:682

Article

Parrino, F.¹  Garcia-Lopez, E.¹  Marci, G.¹  Palmisano, L.¹  Felice, V.^2,3  Sora, I. Natali^2,3  Armelao, L.^4,5 

[1] Univ Palermo, Dipartimento Energia Ingn Informaz & Modelli Mate, Schiavello Grillone Photocatalysis Grp, Edificio 6,Viale Sci, I-90128 Palermo, Italy

[2] Univ Bergamo, INSTM RU Bergamo, Viale Marconi 5, I-24044 Bergamo, Italy

[3] Univ Bergamo, Dipartimento Ingn, Viale Marconi 5, I-24044 Bergamo, Italy

[4] Univ Padua, IENI CNR, Via Marzolo 1, I-35131 Padua, Italy

[5] Univ Padua, INSTM, Dipartimento Sci Chim, Via Marzolo 1, I-35131 Padua, Italy

关键词: Photocatalysis;    LaFeO3;    Perovskite;    Cu(II) substituted LaFeO3;   

DOI  :  10.1016/j.jallcom.2016.05.017

来源: Elsevier

【 摘 要 】

LaFeO3 perovskites, both bare and containing 5-40 mol% of Cu(II) substituting Fe(III), have been prepared by the citrate autocombustion synthesis method and used as heterogeneous photocatalysts for the degradation of 2-propanol in gas-solid regime under simulated solar light irradiation. Bare LaFeO3 resulted inactive, whereas Cu(II) containing perovskites oxidized 2-propanol to propanone, and eventually to CO2 and H2O. The photocatalytic activity of the Cu containing LaFeO3 perovskites increased by increasing the Cu amount up to 10 mol% and hence slightly decreased for higher copper contents. The samples were fully characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman and diffuse reflectance (DRS) spectroscopies, X-ray photoelectron spectroscopy (XPS) and photocurrent measurements. The photocatalytic activity was correlated with compositional, structural and morphological features. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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