Facile fabrication of Au/Fe3O4 nanocomposites as excellent nanocatalyst for ultrafast recyclable reduction of 4-nitropheol

被引：100

作者：

Yang, Yanting ^{[1
]}

Jiang, Kaidi ^{[1
]}

Guo, Jia ^{[1
]}

Li, Jing ^{[1
]}

Peng, Xiaoling ^{[1
]}

Hong, Bo ^{[1
]}

Wang, Xinqing ^{[1
]}

Ge, Hongliang ^{[1
]}

机构：

[1] China Jiliang Univ, Zhejiang Prov Key Lab Magnet Mat, Coll Mat & Chem, Hangzhou 310018, Zhejiang, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2020年 / 381卷

基金：

中国国家自然科学基金;

关键词：

Au/Fe3O4; nanocatalyst; 4-Nitrophenol; Superior catalytic activity; Catalyst recycling; METAL-FREE CATALYSTS; HIGHLY EFFICIENT; GOLD NANOPARTICLES; P-NITROPHENOL; AU NANOCLUSTERS; ADSORPTION; OXIDATION; NITROAROMATICS; HYDROGENATION; NANOCRYSTALS;

D O I：

10.1016/j.cej.2019.122596

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A highly efficient Au/Fe3O4 nanocatalyst is fabricated by using a seed deposition method, and is characterized by XRD, TEM, EDS, XPS, UV-vis and VSM, respectively. TEM image shows that small Au nanoparticles are immobilized onto Fe3O4 surface uniformly and densely. After immersion treatment by NaBH4, the Au/Fe3O4 nanocatalyst exhibits high catalytic efficiency in reducing 4-nitrophenol to 4-aminophenol. The 4-nitrophenol could be fully degraded in less than one minute. The Au/Fe3O4 nanocatalyst demonstrate good magnetic recoverability and high conversion in 1 min (> 98%) after 8 successive cycles. The reaction rate constant k of the catalyst with volume Au sol/mass Fe3O4 microspheres ratio 3 (Au/FeO-3) is 13.8 min(-1), which is 4.7 times larger than that of Au/FeO-1. The catalytic mechanisms were discussed. This work provides a simple and environmentally friendly method for preparing magnetic noble nanocatalyst used for 4-nitrophenol reduction.

引用

页数：10

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