In the present study, nickel nanoparticles (Ni-NPs) immobilized on graphene oxide-chitosan (GO-Chit-Ni) have been synthesized and characterized as a catalyst for reduction of nitroarenes in water. For this purpose, GO has been functionalized with chitosan (GO-Chit). Then, Ni-NPs were immobilized on the surface of GO-Chit using a simple method. The GO-Chi-Ni nanocomposites were characterized using Fourier Transforms Infrared Spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), X-Ray Diffraction Measurements (XRD), and Atomic Adsorption Spectrometry (AAS). The GO-Chi-Ni nanoparticles demonstrated appropriate catalytic activity in reducing nitroarenes to aryl amines in the existence of sodium borohydride (NaBH4) aqueous solution as a hydrogen source at 80oC. This catalytic system applies environmentally benign water as a solvent that is cheap, easily accessible, non-toxic, non-volatile, non-flammable and thermally stable. This type of catalyst can be applied several times with no considerable change in its performance.

在本研究中，已经合成了固定在氧化石墨烯-壳聚糖（GO-Chit-Ni）上的镍纳米粒子（Ni-NPs），并表征了其为还原水中硝基芳烃的催化剂。为此，GO已使用壳聚糖（GO-Chit）功能化。然后，使用一种简单的方法将Ni-NPs固定在GO-Chit的表面上。使用傅立叶变换红外光谱（FT-IR），透射电子显微镜（TEM），X射线衍射测量（XRD）和原子吸收光谱（AAS）对GO-Chi-Ni纳米复合材料进行了表征。GO-Chi-Ni纳米粒子在80oC的硼氢化钠（NaBH4）水溶液为氢源的情况下显示出适当的催化活性，可将硝基芳烃还原为芳基胺。该催化系统使用环境友好的水作为溶剂，该溶剂便宜，易于获得，无毒，不挥发，不易燃且具有热稳定性。这种类型的催化剂可以使用几次，而其性能不会有明显变化。