Facile preparation of hydrophilic In2O3 nanospheres and rods with improved performances for photocatalytic degradation of PFOA

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Liu, Xiaoqing
Xu, Bentuo
Duan, Xiaoguang
Hao, Qiang
Wei, Wei
Wang, Shaobin
Ni, Bing-Jie
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2021
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Abstract

Perfluorooctanoic acid (PFOA, C7F15COOH) has raised global concerns because of its ubiquitous occurrence and resistance to most conventional water treatment techniques. In this work, we first used metal-organic framework (MOF) derived In2O3nanospheres (In2O3NS) and rods for photocatalytic degradation of PFOA under UV light irradiation. XRD was used to confirm the successful preparation of MOF-derived In2O3. SEM images show that In2O3NS and rods were obtained by the calcination of different indium (iii)-benzenedicarboxylate (In-BDC) MOFs. In2O3NS and rods demonstrated enhanced performances for photodegradation of PFOA compared with the commercial In2O3. The results show that PFOA was completely decomposed in 3 h, and its shorter-chain products were further mineralized in 6 h in the presence of In2O3NS under 254 nm UV light irradiation. MOF-derived In2O3is super-hydrophilic with a contact angle of ∼20° and possesses larger specific surface area, which facilitate the adsorption and tight coordination of PFOA with In2O3. Moreover, EIS Nyquist spectra show that the as-prepared In2O3NS and rods have higher efficiency in charge separation and migration compared with the commercial In2O3. All these properties contribute to the destruction of PFOA.

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Environmental Science: Nano

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8

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4

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This publication has been entered as an advanced online version in Griffith Research Online.

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Environmental sciences

Chemical engineering

Science & Technology

Physical Sciences

Life Sciences & Biomedicine

Chemistry, Multidisciplinary

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Liu, X; Xu, B; Duan, X; Hao, Q; Wei, W; Wang, S; Ni, B-J, Facile preparation of hydrophilic In2O3 nanospheres and rods with improved performances for photocatalytic degradation of PFOA, Environmental Science: Nano, 2021, 8 (4), pp. 1010-1018

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