采用溶胶-凝胶法制备了尖晶石型铁氧体Co1-xNaxFe2O4的系列样品，通用XRD，SEM对颗粒的结构、形貌进行了分析。结果表明，所合成的样品均为尖晶石型铁氧体；未掺杂样品CoFe2O4的形貌呈立方颗粒状，粒径均匀，边长约为1μm，掺杂后的样品Co0.8Na0.2Fe2O4颗粒为圆球状，尺寸大约在100~200nm，且有明显团聚的现象。通过对亚甲基蓝的降解情况对其光催化活性进行了研究。结果表明，经过A位Na+掺杂的CoFe2-xCrxO4样品，光催化活性明显提高。%Ferrite with spinel structure were synthesized by sol-gel method.The structure and appearance of the synthesized nanoparticles were characterized by XRD and SEM.The results of the as-prepared Co1-xNaxFe2O4 spinel structure,just place of tiptop diffract apex happen excursion,so as to structure transition from orthorhombic to monoclinic. The morphologies of not adulterate CoFe2O4 are cubic grain and dispersive with the average size about 1μm in diameter. The morphologies of adulterate Co0.8Na0.2Fe2O4 are pellet grain with the average size about 100-200nm, appear obvious reunite phenomenon.The photoeatalytieal activity of Co1-xNaxFe2O4 samples was mea-sured by the degradation of methylic orange,the results show that the A-site doping can improve the photocatalysis activity of Co1-xNaxFe2O4.
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