Influence of Ni on enhanced catalytic activity of Cu/Co3O4 towards reduction of nitroaromatic compounds: studies on the reduction kinetics

被引：36
作者：
Deka, Pangkita [1 ]
Choudhury, Rimjim [1 ]
Deka, Ramesh C. [1 ]
Bharali, Pankaj [1 ]
机构：
[1] Tezpur Univ, Dept Chem Sci, Napaam 784028, India
来源：
RSC ADVANCES | 2016年 / 6卷 / 75期
关键词：
CORE-SHELL NANOPARTICLES; ALLOY NANOPARTICLES; CO3O4; NANOSTRUCTURES; GRAPHENE OXIDE; CONTROLLABLE SYNTHESIS; REUSABLE CATALYST; P-NITROPHENOL; PERFORMANCE; EFFICIENT; HYDROGENATION;
D O I：
10.1039/c6ra16301g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this work, we have investigated the influence of Ni on Cu/Co3O4 towards catalytic reduction of nitroaromatic compounds. For this purpose, Cu, Ni and CuNi alloy nanoparticles supported over Co3O4 are synthesized by a surfactant aided co-reduction method. The Co3O4 support is synthesized via a template-free hydrothermal route. The Co3O4 support and CuNi/Co3O4 nanocatalysts are characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), UV-visible spectroscopy and Brunauer-Emmett-Teller (BET) surface area techniques. The Co3O4 supported CuNi alloy nanoparticles exhibit superior catalytic performance for 4-nitrophenol (4-NP) reduction in comparison to the monometallic catalysts due to synergistic effects. Furthermore, the supported bimetallic nanoparticles demonstrate high recycling ability towards the reduction of 4-NP up to six cycles. To demonstrate the effectiveness of the highly active CuNi/Co3O4 nanocatalyst towards reduction of various nitroaromatics, the catalyst is also used for reduction of 4-nitroaniline, 4-nitrotoluene, 3-nitroaniline, and 2-nitroaniline. The presence of the CuNi/Co3O4 interfaces in the nanocatalyst is believed to be responsible for the high catalytic activity.
引用
收藏
页码：71517 / 71528
页数：12
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