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Journal of Materials Science
Erschienen in: Journal of Materials Science 19/2019

05.07.2019 | Chemical routes to materials

Anchoring Co3O4 on BiFeO3: achieving high photocatalytic reduction in Cr(VI) and low cobalt leaching

verfasst von: Xuefeng Shi, Shanyu Quan, Linmei Yang, Cong Liu, Fanian Shi

Erschienen in: Journal of Materials Science | Ausgabe 19/2019

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Abstract

A novel Co3O4–BiFeO3 nanocomposite was successfully prepared via a facile hydrothermal method followed by an impregnation process and well characterized with XRD, TEM, FTIR, XPS, UV–Vis DRS and PL spectrum. XPS and TEM analyses reveal that Co3O4 nanoparticles were successfully anchored on the BiFeO3. The photocatalytic activities of prepared photocatalysts were evaluated by removal of Cr(VI) under visible light (300 W Xe lamp irradiation). The results indicate that the 0.8% CO3O4–BiFeO3 (Co0.8Bi) sample calcined at 500 °C for 4 h showed the best performance, and the rate constant k of Cr(VI) reduction over Co0.8Bi is about 13.7- and 23.3-fold compared with pure BiFeO3 and Co3O4, respectively. More importantly, the CO3O4-BiFeO3 catalyst exhibited highly chemical stability with Co leaching of lower than 34.5 μgL−1, which is attributed to a strong interaction between Bi and Co components in Co3O4–BiFeO3. The effects of Co3O4 loading, calcination temperature and initial pH on catalytic activity and cobalt leaching were optimized.
Vorheriger Artikel Size, structure, and luminescence of Nd2Zr2O7 nanoparticles by molten salt synthesis
Nächster Artikel Effect of Al substrate microstructure on layered double hydroxide morphology

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Metadaten
Titel
Anchoring Co3O4 on BiFeO3: achieving high photocatalytic reduction in Cr(VI) and low cobalt leaching
verfasst von
Xuefeng Shi
Shanyu Quan
Linmei Yang
Cong Liu
Fanian Shi
Publikationsdatum
05.07.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 19/2019
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-019-03816-x

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