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Nanomaterials 2018, 8(5), 329;

Highly Efficient, Low-Cost, and Magnetically Recoverable FePt–Ag Nanocatalysts: Towards Green Reduction of Organic Dyes

College of Physics, Jilin Normal University, Siping 136000, China
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
Technology Development Department, GLOBALFOUNDRIES (Singapore) Pte. Ltd., 60 Woodlands Industrial Park D, Street 2, Singapore 738406, Singapore
School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
United Microelect Corp. Ltd., 3 Pasir Ris Dr 12, Singapore 519528, Singapore
These authors contributed equally to this work.
Authors to whom correspondence should be addressed.
Received: 1 April 2018 / Revised: 11 May 2018 / Accepted: 11 May 2018 / Published: 14 May 2018
(This article belongs to the Special Issue Alleviating Climate Change and Pollution with Nanomaterials)
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Nowadays, synthetic organic dyes and pigments discharged from numerous industries are causing unprecedentedly severe water environmental pollution, and conventional water treatment processes are hindered due to the corresponding sophisticated aromatic structures, hydrophilic nature, and high stability against light, temperature, etc. Herein, we report an efficient fabrication strategy to develop a new type of highly efficient, low-cost, and magnetically recoverable nanocatalyst, i.e., FePt–Ag nanocomposites, for the reduction of methyl orange (MO) and rhodamine B (RhB), by a facile seed deposition process. X-ray diffraction results elaborate that the as-synthesized FePt–Ag nanocomposites are pure disordered face-centered cubic phase. Transmission electron microscopy studies demonstrate that the amount of Ag seeds deposited onto the surfaces of FePt nanocrystals increases when increasing the additive amount of silver colloids. The linear correlation of the MO and RhB concentration versus reaction time catalyzed by FePt–Ag nanocatalysts is in line with pseudo-first-order kinetics. The reduction rate constants of MO and RhB increase with the increase of the amount of Ag seeds. FePt–Ag nanocomposites show good separation ability and reusability, and could be repeatedly applied for nearly complete reduction of MO and RhB for at least six successive cycles. Such cost-effective and recyclable nanocatalysts provide a new material family for use in environmental protection applications. View Full-Text
Keywords: FePt–Ag nanocomposites; magnetic properties; catalytic reduction; organic dyes FePt–Ag nanocomposites; magnetic properties; catalytic reduction; organic dyes

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Liu, Y.; Zhang, Y.; Kou, Q.; Chen, Y.; Sun, Y.; Han, D.; Wang, D.; Lu, Z.; Chen, L.; Yang, J.; Xing, S.G. Highly Efficient, Low-Cost, and Magnetically Recoverable FePt–Ag Nanocatalysts: Towards Green Reduction of Organic Dyes. Nanomaterials 2018, 8, 329.

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