【摘要】 以介孔氧化硅LP-FDU-12作为硬模板,通过纳米复制技术合成出具有单晶结构的介孔CO₃O₄小球,对合成样品进行XRD、TEM、N2吸脱附、超导量子干涉仪（SQUID）测试表征。结果表明,所合成的介孔CO₃O₄较完整地复制了LP-FDU-12的介孔孔道结构,其比表面积到53 m²/g,较传统方法合成的纳米CO₃O₄有较大提高。磁性能研究表明,在奈尔温度T_N为35 K时,出现磁反转,由反铁磁性转变为弱铁磁性。更多还原

【Abstract】 Mesoporous single-crystal Co₃O₄ was obtained via nanocasting method using mesoporous silica LP-FDU-12 as hard template.The material were characterized by XRD,HRTEM,nitrogen adsorption-desorption and SQUID.The results show that the meso-structure of LP-FDU-12 was well replicated by mesoporous Co₃O₄.The surface area of mesoporous Co₃O₄ is 53m’/g.The temperature dependence curves of magnetization indicate mainly antiferromagnetism and weak ferromagnetism of mesoporous Co₃O₄ at T_N:35 K respectively.更多还原