Multi-Composite Ferrite Materilas: Preparation, Structurel And Catalytic Properties

Composite metal oxides of spinel structure were well known for its unique properties of magnetism, optics, electricity and catalysis. Together with the superior capability of corrosion and high temperature resistance, multi-composite ferrite materials obviously have been drawing more and more attention in many fields. Current researches were focused primarily upon controlling the particle size, doping and surface modification of the materials. In this dissertation, multi-composite ferrite materials and multi-composite ferrite/CNTs materials were synthesized at a relatively low temperature by using separate nucleation and aging Steps integrating reduction-oxidation method. The structure and catalytic activities of the products were the main emphasis of this research. The conclusions as followed:1. CoxZn1-xFe2O4 nanoparticles were synthesized as photocatalyst applied to MB degration the impact on structure and catalytic activities of products were corresponding to the change of Co2+ doping content. Investigated the variations of particle size, specific surface area, band gap and magnetic properties of products by regulating Co2+ doping content in virtue of characterization technique, and evaluated catalytic activities.2. Multi-composite ferrite materials CuxCo1-xFe2O4 were prepared as photocatalyst applied to phenol oxidation. In virtue of characterization technique, we were able to find out the products remained spinel structure by adding proper quantities of Cu2+, however, an excessive amount of Cu2+ would cause the distortion of lattice, impurities such as CuO or Fe2O3 were emerged from products. The influence of Cu2+ doping content on catalytic activities and magnetic properties were also investigated.3. Functionalized the prepared CNTs with aquafortis in order to add more active groups on surface. Synthesized ZnFe2O4/CNTs composite with different mass ratio as photocatalyst applied to MB degration. ZnFe2O4 nanoparticles were found steady and well-distributed over CNTs. Investigated the influence on catalytic activities of ZnFe2O4/CNTs composite with different mass ratio.