Preparation Of Transition Metal Compound-based Nanomaterials For Catalytic Reduction Of Nitrobenzene

Nitrobenzene,an important organic intermediate,is usually be reduced to produce high value aniline.but it is toxic to the environment or human body.The development of catalysts plays an important role for improving the efficiency of nitrobenzene degradation and aniline production In this paper,transition metal compound-based non-homogeneous nanomaterials of FeOOH/GCL and Cu1.8S/S2 was prepared by hydrothermal method.The structure and analytical properties of FeOOH/GCL and Cu1.8S/S2 towards nitrobenzene reduction were systematically investigated.Relevant research contents are as follows:(1)Preparation of FeOOH/GCL for catalytic reduction of nitrobenzene:Fusiform β-FeOOH/graphene-like carbon complex(FeOOH/GCL)was prepared by hydrothermal method with ferric chloride and go as raw materials.FeOOH/GCL was characterized by XRD,Raman,SEM,TEM and XPS.The catalytic activity of FeOOH/GCL for nitrobenzene reduction was also studied.The results show that FeOOH/GCL has good catalytic performance for the reduction of nitrobenzene and structural stability.After the fifth recycling,The conversion rate still reached 90%at the fifth cycle.In addition,the effects of GCL loading capacity andreaction temperature on the catalytic activity of FeOOH/GCL were discussed.Obtaining the optimal production process is of great significance for treating nitrobenzene and reducing the production cost of aniline(2)Preparation of Cu1.8S for catalytic reduction of nitrobenzene:A series of Cu1.8S nanoparticles with different S2 doping amount were synthesized by hydrothermal method from sulfur powder,sodium hydroxide and copper chloride.They were characterized by XRD,Raman,SEM,TEM and XPS,respectively.The results show that S2 exists in Cu1.8S nanoparticles.The Cu1.8S nanoparticles with different S2 doping amount have different morphology characteristics.Through the performance test,it was found that with the increase of S2 doping amount,the number of electrons and holes excited by laser also increased,and the separation time of electrons and holes became shorter.In addition,S2 doped Cu1.8S had excellent photocatalytic performance for reducing nitrobenzene.This work provides a simple and efficient method for S2 doping in sulfide.