可回收金/Fe3O4 微颗粒还原 2,4-二硝基苯酚和阴离子、阳离子偶氮染料催化活性的比较研究

IF 2.5 4区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
MSc. Ikhbayar Batsukh, Assoc. Prof. Tegshjargal Khishigjargal, Uuriintuya Dembereldorj, Assoc. Prof. Munkhtsetseg Sambuu, Assoc. Prof. Erdene-Ochir Ganbold, Assoc. Prof. Erdene Norov
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引用次数: 0

摘要

本研究对金/Fe3O4 微颗粒作为可重复使用的催化剂用于还原三种不同的有机污染物(即 2,4-二硝基苯酚、刚果红和亚甲蓝染料)进行了比较分析。结果表明,金/Fe3O4 微颗粒在还原这些污染物方面具有很强的催化活性,即使在 5 次循环后仍可重复用于还原 2,4-二硝基苯酚和刚果红染料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Comparative Study of Catalytic Activity of Recyclable Au/Fe3O4 Microparticles for Reduction Of 2,4-Dinitrophenol and Anionic, Cationic Azo Dyes.

Comparative Study of Catalytic Activity of Recyclable Au/Fe3O4 Microparticles for Reduction Of 2,4-Dinitrophenol and Anionic, Cationic Azo Dyes.

Comparative Study of Catalytic Activity of Recyclable Au/Fe3O4 Microparticles for Reduction Of 2,4-Dinitrophenol and Anionic, Cationic Azo Dyes.

We synthesized Au/Fe3O4 microparticles. Initially, citrate-capped Fe3O4 micro-sized particles were synthesized by the co-precipitation method with an excess amount of trisodium citrate. Gold ions were reduced on the surface of citrate-capped Fe3O4 and grew as gold sub-microparticles with an average diameter of 210 nm on the surface. The characteristic SPR peak of gold nanoparticles on the surface of Fe3O4 was detected at 584 nm, whereas the absorption in the near-infrared region was increased. SEM images has proved that the synthesized Au/Fe3O4 composite microparticles has an average diameter of 1.7 micrometers. The results of XRD patterns proved the existence of both crystal phases of Fe3O4 and Au particles. To investigate the catalytic activity, the reaction rate constant of reduction of 2,4-dinitrophenol (2,4-DNP) and degradation of Congo red (CR), and methylene blue (MB) with NaBH4 in the presence of Au/Fe3O4 catalyst was monitored by UV-Vis spectroscopy. The initial reaction rate constant calculated from the change in characteristic peak absorptions of 2,4-dinitrophenol was 3.97×10−3 s−1, while the reaction rate constants for the degradation of CR and MB were 9.72×10−3 s−1 and 14.25×10−3 s−1 respectively. After 5 cycles, Au/Fe3O4 microparticles preserved 99 % of the reaction rate constant, exhibiting considerable recycling efficiency in the reduction of nitro groups.

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来源期刊
ChemistryOpen
ChemistryOpen CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
4.80
自引率
4.30%
发文量
143
审稿时长
1 months
期刊介绍: ChemistryOpen is a multidisciplinary, gold-road open-access, international forum for the publication of outstanding Reviews, Full Papers, and Communications from all areas of chemistry and related fields. It is co-owned by 16 continental European Chemical Societies, who have banded together in the alliance called ChemPubSoc Europe for the purpose of publishing high-quality journals in the field of chemistry and its border disciplines. As some of the governments of the countries represented in ChemPubSoc Europe have strongly recommended that the research conducted with their funding is freely accessible for all readers (Open Access), ChemPubSoc Europe was concerned that no journal for which the ethical standards were monitored by a chemical society was available for such papers. ChemistryOpen fills this gap.
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