Facile Formation of Bi2O2CO3/Bi2MoO6 Nanosheets for Visible Light-Driven Photocatalysis | Zendy

Junlei Zhang | Zendy; Zhendong Liu | Zendy; Zhen Ma | Zendy

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Facile Formation of Bi₂O₂CO₃/Bi₂MoO₆ Nanosheets for Visible Light-Driven Photocatalysis

Author(s) -

Junlei Zhang,

Zhendong Liu,

Zhen Ma

Publication year - 2019

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.8b03699

Subject(s) - photocatalysis , rhodamine b , x ray photoelectron spectroscopy , spectroscopy , materials science , photoluminescence , dielectric spectroscopy , photochemistry , methyl orange , diffuse reflectance infrared fourier transform , photocurrent , scanning electron microscope , fourier transform infrared spectroscopy , analytical chemistry (journal) , nuclear chemistry , chemistry , electrochemistry , catalysis , chemical engineering , optoelectronics , electrode , organic chemistry , physics , quantum mechanics , composite material , engineering

Bi 2 O 2 CO 3 /Bi 2 MoO 6 heterojunction catalysts were prepared by treating Bi 2 MoO 6 sheets with aqueous NaHCO 3 solutions at room temperature. All the Bi 2 O 2 CO 3 /Bi 2 MoO 6 heterojunctions exhibited higher activities than pristine Bi 2 MoO 6 in the photocatalytic degradation of rhodamine B (RhB), methyl orange, and ciprofloxacin under visible-light irradiation, and the most active photocatalyst was found to be the one with a C/Bi molar ratio of ∼1/2.3. Relevant samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, N 2 adsorption-desorption, Fourier transform infrared spectroscopy, and UV-vis spectroscopy. The higher activity of Bi 2 O 2 CO 3 /Bi 2 MoO 6 than pristine Bi 2 MoO 6 is explained by the enhanced separation and transfer of photogenerated electron/hole pairs, as verified by transient photocurrent densities, photoluminescence spectroscopy, and electrochemical impedance spectroscopy. Photogenerated holes (h + ) and superoxide radical anions ( • O 2 - ) were found to be the main active species. The good reusability of Bi 2 O 2 CO 3 /Bi 2 MoO 6 was testified by cycling degradation of RhB and tetracycline hydrochloride.

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