Chitosan-based film supported copper nanoparticles: A potential and reusable catalyst for the reduction of aromatic nitro compounds
Chitosan-based film supported copper nanoparticles: A potential and reusable catalyst for the reduction of aromatic nitro compounds
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DOI：
10.1016/j.carbpol.2017.01.018
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发表时间：
2017-04-01
影响因子：
11.2
通讯作者：
Fajardo, Andre R.
中科院分区：
文献类型：
--
作者：
de Souza, Jaqueline F.;da Silva, Gabriela T.;Fajardo, Andre R.
在本研究中，利用一种简单的方法在温和的条件下合成了铜纳米粒子(CuNPs)，并将其稳定到壳聚糖/聚乙烯醇(CP)基膜中。本研究中使用的聚合物基质允许合成稳定的纳米颗粒，其尺寸分布在薄膜基质中。此外，该体系表现出非常有吸引力的性能，如良好的机械性能、耐化学性、在使用和回收过程中易于操作、与其他类似体系相比相对较低的成本等。考察了Cp-Cu膜在硝基苯制苯胺(AN)还原反应中的催化性能。我们的研究结果表明，与其他催化剂相比，Cp-Cu膜有效地催化了反应，并降低了活化能(E-a)。连续重复使用6次后，Cp-Cu对该反应的催化效率仍保持不变。所有这些结果使该新体系成为芳香族硝基化合物还原为芳香胺的一种很有前途的催化剂。(C)2017爱思唯尔有限公司。保留所有权利。
In this study, copper nanoparticles (CuNPs) were synthesized and stabilized into a chitosan/poly(vinyl alcohol) (CP) based film using a simple protocol under mild conditions. The polymeric matrix utilized in this study allows synthesizing stable nanoparticle with narrow size distribution within the film matrix. Further, this system showed very attractive properties, such as good mechanical properties, chemical resistance, easy handling during use and recovery, relatively low-cost as compared to other similar systems, among others. The catalytic performance of CP-Cu film was tested in the reduction reaction of nitrobenzene (NB) to aniline (AN). Our findings reveal that CP-Cu film catalyzes the reaction efficiently and also decreases the energy of activation (E-a) as compared to other catalysts. The catalytic efficiency of CP-Cu regarding this reaction was kept even after 6 consecutive reuse cycles. All these results rank this novel system as a promising catalyst in the reduction of aromatic nitro compounds to aromatic amines. (C) 2017 Elsevier Ltd. All rights reserved.