【摘要】 本文通过有机物前驱体法制备尖晶石型CuAl₂O₄纳米晶,利用TG-DTA、XRD、TEM、UV-VIS等分析手段表征了前驱体和CuAl204粉体。结果表明,CuAl₂O₄在热处理中出现了CuO中间相,经900℃焙烧得到单相CuAl₂O₄。800℃的CuAl₂O₄的禁带宽度为1.92 eV,颗粒直径在20～40 nm,具有最佳的光催化活性:在紫外光辐照2h对甲基橙的降解率为99%,在可见光和太阳光下也具有较高的活性。更多还原

【Abstract】 Spinel-type CuAI204 nanocrystalline was prepared by organic precursor method in this paper.The precursor and CuAl₂O₄ powder was characterized by TG-DTA,XRD,TEM,UV-VIS,etc.The result suggested that an intermediate-phase CuO appeared in the system of CuAl₂O₄ during the heat treatment and disappeared at 900℃. The band gap of CuAl₂O₄ obtained at 800℃is 1.92 eV and its particle diameter ranges from 20 to 40 nm.The sample had the highest photocatalytic activity:the efficiency of methyl orange photodegradation can reach 99% after ultraviolet illumination for 2 h and it also has high photocatalytic activity under visible light and sunshine.更多还原