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- W4291638269 endingPage "121893" @default.
- W4291638269 startingPage "121893" @default.
- W4291638269 abstract "Selective adsorbents for the sorted recovery of ppm-level mixed cation solutions have been identified as a promising strategy. However, the current design of adsorbents is still abided by the modification or enhancement for the common adsorption sites. The focus on other adsorption interfaces with innovative designs is rarely. In this paper, we report an adsorbent for shell-core type Fe3O4@TiO2 grown on the edge of montmorillonite. The selective adsorption of Cr3+ was accomplish by constructing an Fe3O4 (3 1 1)-TiO2 (1 0 1) interface through long-range bonds of Fe3+-O-Ti4+, which was in accordance with the Freundlich model. An adsorption amount of Cr3+ was obtained as 194.36 mg/g in the presence of (Cu2+, Sn4+)-Fe3+-O-Ti4+, which was much higher than that of the strongest interference Ni2+ (47.68 mg/g) on the same site, by virtue of promoting electron transport on the Fe3O4 surface through ion doping. Simultaneously, the more active TiO2 surface structure was enabled by polycrystalline surface distortion, which was triggered by the built-in electric field. The increased electron cloud density within Fe3O4 provided electrons, accelerated the enrichment of interfacial holes and endowed sufficient selective sites for restraining Cr3+. This work may provide some insight into the application of interfacial adsorbents for classified collection." @default.
- W4291638269 created "2022-08-15" @default.
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- W4291638269 date "2022-11-01" @default.
- W4291638269 modified "2023-10-15" @default.
- W4291638269 title "Metal cations doping enhances selective adsorption of Cr3+ at oxide interfaces" @default.
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- W4291638269 doi "https://doi.org/10.1016/j.seppur.2022.121893" @default.
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