One-step synthesis of magnetically recyclable Co@BN core-shell nanocatalysts for catalytic reduction of nitroarenes
One-step synthesis of magnetically recyclable Co@BN core-shell nanocatalysts for catalytic reduction of nitroarenes
复制标题
一步合成磁性可回收Co@BN核壳纳米催化剂用于催化还原硝基芳烃
DOI：
10.1039/c7ra04907b
复制
发表时间：
2017-01-01
期刊：
影响因子：
3.9
通讯作者：
Qiu, Xiaoqing
中科院分区：
文献类型：
--
作者：
Du, Man;Liu, Qiuwen;Qiu, Xiaoqing
我们提出了一种简单的一步合成化学稳定和磁性Co@BN核壳纳米粒子。我们发现Co@BN纳米颗粒在温和的反应条件下具有高稳定性和磁性可回收性，是将硝基芳烃还原为氨基芳烃的优良催化剂。13.6 wt% Co@BN样品对4-硝基苯酚（4-NP）的还原活性最好。此外，在催化反应过程中，h-BN载体通过有效吸附/浓缩和电离反应物硝基芳烃，观察到显著的协同效应。考察了不同反应温度、4-硝基苯酚浓度、硼氢化钠浓度、金属负载量和催化剂用量对催化反应动力学的影响。测定了4-硝基苯酚催化还原13.6 wt% Co@BN的活化能为102.93 kJ mol（-1）。这项工作提供了一个清晰的例子Co@BN核壳纳米颗粒作为纳米催化剂。
We present a facile one-step synthesis of chemically stable and magnetic Co@BN core-shell nanoparticles. We found that Co@BN nanoparticles acted as excellent catalysts with high stability and magnetic recyclability for reduction of nitroarenes to aminoarenes under mild reaction conditions. The sample 13.6 wt% Co@BN showed the best catalytic activity for reduction of 4-nitrophenol (4-NP). In addition, a significant synergistic effect of the h-BN support was observed during the catalytic reaction by effectively adsorbing/concentrating and ionizing the reactant nitroaromatics. Moreover, the kinetics of the catalytic reaction were investigated at different reaction temperatures, 4-nitrophenol concentrations, sodium borohydride concentrations, metal loadings and catalyst amounts. The activation energy of the catalytic reduction of 4-nitrophenol for 13.6 wt% Co@BN was determined to be 102.93 kJ mol(-1). This work provides a clear example of Co@BN core-shell nanoparticles as nanocatalysts.