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Synthesis of Novel Ternary Photocatalyst Ag3PO4/Bi2WO6/Multi-Walled Carbon Nanotubes and Its Enhanced Visible-Light Photoactivity for Photodegradation of Norfloxacin

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Novel nanocomposites of Ag3PO4/Bi2WO6/MWCNTs were prepared via a facile hydrothermal method and in-situ precipitation without the addition of any spherical template. The composites exhibited excellent catalytic activity under visible-light irradiation. Compared with pure Ag3PO4, Bi2WO6, Bi2WO6/MWCNTs, and Ag3PO4/Bi2WO6, ternary Ag3PO4/Bi2WO6/MWCNTs nanocomposites showed the best photocatalytic performance due to the narrow band gap, large specific surface area, high charge separation efficiency, and strong light absorbance in the visible region. Degradation experiments involving norfloxacin (NOR) antibiotics under visible-light irradiation confirmed ideal photocatalytic activity of Ag3PO4/Bi2WO6/MWCNTs nanocomposites. Degradation products of NOR were identified via LC-MS/MS analysis, and a potential photodegradation mechanism of NOR was discussed; results indicated that these antibiotics could be degraded via three pathways. The piperazinyl ring was the most reactive site for hydroxyl radical attacks, followed by stepwise oxidation and further ring-opening. Overall, the composites appear to be promising materials for removing contaminants from water.
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Keywords: Ag3PO4/Bi2WO6/MWCNTs; Degradation Mechanism; LC-MS/MS; Nanocomposites; Norfloxacin

Document Type: Research Article

Affiliations: 1: College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, Shanghai 201620, China 2: Zhejiang Province New Textile Research & Development Emphasised Laboratory, Hangzhou 310009, China 3: Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection of Ministry Education, Guangxi Normal University, Guilin 541004, China

Publication date: April 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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