Abstract: Water pollution,especially caused by p-nitrophenol,has drawn more and more attention in recent years. To solve the problem,catalytic reduction of p-nitrophenol into p-aminophenol is proposed,however,it requires catalyst of high activity and easy to recovery. Nano spinel CuFe_xCo_2-xO₄ recyclable catalysts(CuFe₂O₄、CuFeCoO₄、CuCo₂O₄) are prepared via a gel-burning method,and their catalytic activities are investigated in the catalytic nitrophenol reduction_.XRD characterization indicates that CuFe₂O₄,CuFeCoO₄ and CuCo₂O₄ catalysts all have excellent spinel phase structure. Micro-morphologies of nano spinel CuFe₂O₄,CuFeCoO₄ and CuCo₂O₄ catalysts are checked using SEM. SEM images showed that nano spinel CuCo₂O₄ catalyst has smaller particle size and higher dispersions than those of CuFe₂O₄ and CuFeCoO₄ catalysts. In the catalytic nitrophenol reduction,nano spinel CuCo₂O₄ catalyst exhibits much higher catalytic activity than CuFe₂O₄ and CuFeCoO₄ catalysts.

Key words: nanoparticles, catalyst, chemical reaction, reduction, reactivity

摘要： 目前，水质污染特别是对硝基苯酚造成的水质污染正受到越来越多的重视和关注。为了解决这一问题，提出了一种催化还原对硝基苯酚转化为对氨基苯酚的方法，而还原过程中一般都需要活性高、易回收的催化剂。本文采用凝胶-燃烧法制备了一系列易回收的CuFe_xCo_2-xO₄纳米尖晶石催化剂（CuFe₂O₄、CuFeCoO₄和CuCo₂O₄），并系统探究了催化剂在对硝基苯酚催化还原中的催化活性。XRD表征表明，催化剂CuFe₂O₄、CuFeCoO₄、CuCo₂O₄属于尖晶石结构。通过扫描电镜对比了纳米尖晶石催化剂CuFe₂O₄、CuFeCoO₄、CuCo₂O₄的微观形貌，相对于催化剂CuFe₂O₄、CuFeCoO₄，纳米尖晶石CuCo₂O₄催化剂具有更小的粒径和分散度。催化还原对硝基苯酚的实验结果表明，相对于催化剂CuCoFeO₄和CuFe₂O₄，纳米尖晶石CuCo₂O₄催化剂在对硝基苯酚的还原中具有更高的催化活性和良好的应用前景。

关键词: 纳米粒子, 催化剂, 化学反应, 还原, 活性