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Graphene oxide modified LaVO4 nanocomposites with enhanced photocatalytic degradation efficiency of antibiotics

Abstract

The rational design of green and stable photocatalysts applied for highly efficient removal of antibiotics still remains a great challenge. Especially the systematic analysis of the degradation pathway and toxicity of antibiotic degradation products is essential, but there are few studies. Herein, novel GO/LaVO4 composite materials were fabricated via a one-step hydrothermal method and presented enhanced photocatalytic degradation efficiency for tetracycline (TC) and naproxen (NPX) under visible light irradiation. 0.01% GO/LaVO4 presented the highest degradation rate with good stability, which improves 3.46 times for TC and 2.29 times for NPX compared to pure LaVO4. Especially worth mentioning, the intermediates of TC produced during photodegradation reaction and corresponding possible degradation pathway was in-depth analyzed with mass spectrometry (MS) spectra. More importantly, through the design of toxicology experiments, the toxicity of TC solution was obvious eliminated after the photocatalytic treatment. Results indicated that the modifying of GO could efficiently improve the optical absorption property and accelerate the separation and migration of photogenerated charge carriers, thus enhance the photocatalytic activity. This work offers a new perspective on the design of other LaVO4-based photocatalysts for efficient antibiotics removal.

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Publication details

The article was received on 17 Aug 2018, accepted on 10 Sep 2018 and first published on 10 Sep 2018


Article type: Research Article
DOI: 10.1039/C8QI00864G
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Graphene oxide modified LaVO4 nanocomposites with enhanced photocatalytic degradation efficiency of antibiotics

    Y. Xu, J. Liu, M. Xie, L. Jing, J. Yan, J. Deng, H. Xu, H. Li and J. Xie, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00864G

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