Novel Synthesis Method of Sheet-like Agglomerateβ-Bi2O3 with High Photocatalytic Activity

doi:10.15541/jim20170601

Abstract

Abstract:

Sheet-like agglomerates β-Bi₂O₃ were synthesized via an extraction-precipitation stripping-decomposition method using a leaching solution of bismuthinite as raw materials in acidic chloride media. Phase form of as-prepared Bi₂O₃ was confirmed by X-ray diffraction (XRD) and its morphology was observed by scanning electron microscope (SEM) and transmission electron microscope (TEM). Moreover, photocatalytic activity of the β-Bi₂O₃ was evaluated by measuring the degradation of Rhodamine B (RhB) under visible light irradiation. The results showed that the powders consisted of nanoflakes. The β-Bi₂O₃ exhibited a smaller band gap energy and larger absorbance edge than α-Bi₂O₃ and reported β-Bi₂O₃. In addition, 99.23% of the RhB was degraded under 4 h visible light irradiation and β-Bi₂O₃ was a fairly stable photocatalyst under the experimental conditions.

Key words: β-Bi₂O₃;, leaching solution from bismuthinite, extraction, stripping precipitation, degradation

CLC Number:

TF125

CHEN Jun, ZHAN Jing, DING Feng-Hua, LI Qi-Hou, TANG Yi-Wei. Novel Synthesis Method of Sheet-like Agglomerateβ-Bi₂O₃ with High Photocatalytic Activity[J]. Journal of Inorganic Materials, 2018, 33(8): 919-922.

Figures/Tables 8

Fig. 1 XRD pattern of the precursor

Fig. 2 SEM images of the precursor

Fig. 3 XRD patterns of β-Bi2O3

Fig. 4 (a) SEM, (b) TEM and (c) HRTEM images of β-Bi2O3

Fig. 5 (a) RhB concentration changes with irradiation and (b) RhB degradation in the first four cycle runs for β-Bi2O3

Fig. 6 Possible reaction mechanism of β-Bi2O3 photocatalysts for RhB photodegradation

Fig. S1 UV-Vis diffuse reflectance spectra of as-prepared β-Bi2O3 (inset: plots of (αhν)2 vs. photon energy)

Fig. S2 XRD patterns of as-prepared β-Bi2O3 after degradation of RhB

References 18

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Novel Synthesis Method of Sheet-like Agglomerateβ-Bi₂O₃ with High Photocatalytic Activity

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