Preparation Of Composite Materials Based On Nano-cerium Dioxide And Study On Dye Adsorption/Catalytic Performance

In recent decades,water pollution caused by industrial wastewater and toxic organic solvents has been increasing,which has seriously endangered human health and ecological balance.For this reason,it is a hot topic in recent research that the development of high-efficiency,environmentally friendly,economical,and easy-to-operate water pollution purification materials.As a typical rare earth oxide,Ce O₂nanoparticles can undergo redox cycles between+3 and+4 valences,provide high oxygen storage capacity,and have various preparation methods to prepare Ce O₂with different morphologies.In this paper,two kinds of Ce O₂nanocomposite materials were prepared,and their adsorption and catalytic properties were discussed.Using cerium nitrate hexahydrate as the cerium precursor,Ce O₂nanoparticles were prepared by hydrothermal method,and then MXene/Ce O₂nanocomposites were prepared by the suspension blending method.Through SEM and TEM,it can be seen that the dispersed Ce O₂nanoparticles are attached to the surface of MXene.Then the nanocomposite material adsorbs a certain volume and concentration of methylene blue and rhodamine B dye solution.The results show that the composite MXene/Ce O₂nanomaterial has a significantly better adsorption performance for dye solution than Ce O₂nanoparticles,and the recovered composite material has been subjected to an adsorption cycle experiment and still has good adsorption performance.The CeO₂/BiFeO₃nanocomposites with different molar ratios were prepared by the suspension blending method.The SEM results showed that the morphologies of Ce O₂/Bi Fe O₃nanocomposites with different molar ratios are quite different.Under acidic conditions,the composite material and H₂O₂were used to catalyze a certain volume and concentration of rhodamine B,methylene blue,and saffron T dye solutions,and conducted6 cycles of experiments The experimental results show that the Ce O₂/Bi Fe O₃nano-composite material can degrade the organic dye solution very well,and the cycle data show that the prepared composite material has good cycle stability.