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- W3164334920 endingPage "150129" @default.
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- W3164334920 abstract "Bi5O7I/calcined Bi-doped ZnAl layered double hydroxides (Bi5O7I/ZnAlBi-CLDHs) composites were prepared using the ultrasonic-assisted wet-chemical method, and the removal efficiency of Cr(VI) in an aqueous solution—through the adsorption and photocatalytic reduction of Bi5O7I/ZnAlBi-CLDHs—was investigated. The Bi doping concentration and composition ratio of Bi5O7I/ZnAlBi-CLDHs influence the removal rate of Cr(VI), and the optimal removal ability of Bi5O7I/ZnAlBi-LDHs is attained with 3% Bi doping and a Bi5O7I/ZnAlBi-CLDHs ratio of 1/10. The adsorption rate of Cr(VI) reaches 84% when infiltrating Bi5O7I/ZnAlBi-CLDHs for 60 min, while a higher removal rate of 98%, is attained through photocatalysis with visible light irradiation. The experimental data fit well with the pseudo second-order kinetic model, Langmuir adsorption isotherm model and the first-order reaction equation, which explains the possible Cr(VI) removal mechanism based on the fitting data. XPS results prove that about 61% of the Cr(VI) is gradually reduced to safe Cr(III) through the photocatalysis of Bi5O7I/ZnAlBi-CLDHs by the light irradiation duration 6 h. These results indicated that harmful Cr(VI) can be effectively removed by as-prepared Bi5O7I/ZnAlBi-CLDHs for water security, and that Bi5O7I/ZnAlBi-CLDHs provide a new prospect for the removal of Cr(VI) through adsorption and photocatalysis." @default.
- W3164334920 created "2021-06-07" @default.
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- W3164334920 date "2021-10-01" @default.
- W3164334920 modified "2023-09-26" @default.
- W3164334920 title "Effect of Bi5O7I/calcined ZnAlBi-LDHs composites on Cr(VI) removal via adsorption and photocatalytic reduction" @default.
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- W3164334920 doi "https://doi.org/10.1016/j.apsusc.2021.150129" @default.
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