Enhanced catalyst activity by decorating of Au on Ag@Cu2O nanoshell
Enhanced catalyst activity by decorating of Au on Ag@Cu2O nanoshell
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Ag@Cu2O纳米壳上修饰Au增强催化剂活性
DOI：
10.1016/j.apsusc.2017.11.082
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发表时间：
2018-03-30
影响因子：
6.7
通讯作者：
Jung, Young Mee
中科院分区：
文献类型：
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作者：
Chen, Lei;Liu, Maomao;Jung, Young Mee
我们成功地合成了Au修饰的Ag@Cu2O异质结构通过一个简单的电流替代方法。随着Au前体浓度的增加，Ag@Cu2O表面Au纳米颗粒（NPs）的密度增加，从而改变了Ag@ Cu 2 O-Au结构的催化活性。Au、Ag和Cu 2 O的复合具有良好的催化性能，进一步提高了Ag@ Cu 2 O-Au结构的催化活性。此外，所提出的Ag@ Cu 2 O-Au纳米复合材料用于通过催化还原将有机有毒污染物4-硝基苯酚（4-NP）转化为其无毒且具有医学重要性的氨基衍生物，以优化材料性能。Au修饰的Ag@Cu2O具有良好的催化活性，催化还原时间大大缩短（5 min）。因此，Ag@ Cu 2 O-Au的三个新特性，即，电荷再分配和转移，吸附，和有机污染物的催化还原，被确定用于水修复。所提出的催化性能具有潜在的应用，为双金属和局域表面等离子体共振（LSPR）和过氧化物酶样催化。(c)2017爱思唯尔B. V.保留所有权利。
We successfully synthesized Au-decorated Ag@Cu2O heterostructures via a simple galvanic replacement method. As the Au precursor concentration increased, the density of the Au nanoparticles (NPs) on the Ag@Cu2O surface increased, which changed the catalytic activity of the Ag@Cu2O-Au structure. The combination of Au, Ag, and Cu2O exhibited excellent catalytic properties, which can further effect on the catalyst activity of the Ag@Cu2O-Au structure. In addition, the proposed Ag@Cu2O-Au nanocomposite was used to transform the organic, toxic pollutant, 4-nitrophenol (4-NP), into its nontoxic and medicinally important amino derivative via a catalytic reduction to optimize the material performance. The proposed Au-decorated Ag@Cu2O exhibited excellent catalytic activity, and the catalytic reduction time greatly decreased (5 min). Thus, three novel properties of Ag@Cu2O-Au, i.e., charge redistribution and transfer, adsorption, and catalytic reduction of organic pollutants, were ascertained for water remediation. The proposed catalytic properties have potential applications for photocatalysis and localized surface plasmon resonance (LSPR)- and peroxidase-like catalysis. (c) 2017 Elsevier B.V. All rights reserved.