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UiO-66 derived etched carbon/polymer membranes: high-performance supports for the extraction of organic pollutants from water

journal contribution
posted on 2023-05-19, 20:30 authored by Cabello, CP, Pico, MFF, Fernando Maya AlejandroFernando Maya Alejandro, del Rio, M, Palomino, GT

Herein we report the use of the zirconium metal–organic framework (UiO-66) as precursor to prepare porous carbons by a direct carbonization step (carbon-ZrO2). By applying a post-carbonization acidic etching treatment with hydrofluoric acid (HF), the initial surface area of the carbon-ZrO2 sample increased from 270 m2 g−1 to 1550 m2 g−1 (carbon-ZrO2-HF). This increase is attributed to the partial removal of the ZrO2 present in the UiO-66-derived carbon. Carbon-ZrO2-HF exhibited fast adsorption kinetics and an outstanding maximum adsorption capacity of 510 mg g−1 for the dye rhodamine B. For practical applications, the obtained porous carbon-ZrO2-HF material was used to fabricate a carbon composite membrane using polyvinylidene fluoride. The prepared membranes were applied as water filtration supports for the extraction of toxic phenols from water, including an endocrine disrupting phenol with widespread exposure: bisphenol A. High efficiency for the simultaneous extraction of phenolic pollutants, and an excellent reusability with a variation of a 2% for 10 consecutive bisphenol A extraction cycles, were obtained. Due to their high and accessible porosity, small particles size, and facile processability into membranes, the UiO-66 derived etched carbons are promising materials for environmental applications, such as the extraction of organic toxic pollutants.

History

Publication title

Chemical Engineering Journal

Volume

346

Pagination

85-93

ISSN

1385-8947

Department/School

School of Natural Sciences

Publisher

Elsevier Science Sa

Place of publication

Po Box 564, Lausanne, Switzerland, 1001

Rights statement

Copyright 2018 Elsevier B.V.

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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