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

ABSTRACT: Bi2O2CO3/Bi2MoO6 heterojunction catalysts were prepared by treating Bi2MoO6 sheets with aqueous NaHCO3 solutions at room temperature. All the Bi2O2CO3/Bi2MoO6 heterojunctions exhibited higher activities than pristine Bi2MoO6 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, N2 adsorption-desorption, Fourier transform infrared spectroscopy, and UV-vis spectroscopy. The higher activity of Bi2O2CO3/Bi2MoO6 than pristine Bi2MoO6 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 (•O2 -) were found to be the main active species. The good reusability of Bi2O2CO3/Bi2MoO6 was testified by cycling degradation of RhB and tetracycline hydrochloride.

SUBMITTER: Zhang J 

PROVIDER: S-EPMC6648943 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Facile Formation of Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Nanosheets for Visible Light-Driven Photocatalysis.

Zhang Junlei J   Liu Zhendong Z   Ma Zhen Z  

ACS omega 20190222 2

Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> heterojunction catalysts were prepared by treating Bi<sub>2</sub>MoO<sub>6</sub> sheets with aqueous NaHCO<sub>3</sub> solutions at room temperature. All the Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> heterojunctions exhibited higher activities than pristine Bi<sub>2</sub>MoO<sub>6</sub> in the photocatalytic degradation of rhodamine B (RhB), methyl orange, and ciprofloxacin under visible-light i  ...[more]

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