纳米晶CuAl2O4的合成、表征及光催化性能研究  

Synthesis,characterization and photocatalytic properties of nanocrystalline CuAl_2O_4

作　　者：骆凡[1] 吴季怀[1] 林建明[1] 胡东红[2] 杨媛媛[1] 张云霞[1] 

机构地区：[1]华侨大学材料物理化学研究所,福建泉州362021 [2]泉州师范学院,福建泉州362000

出　　处：《中国科技论文在线》2008年第4期263-267,共5页

基　　金：高等学校博士学科点专项科研基金(20060385001)

摘　　要：本文通过有机物前驱体法制备尖晶石型CuAl_2O_4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,CuAl_2O_4在热处理中出现了CuO中间相,经900℃焙烧得到单相CuAl_2O_4。800℃的CuAl_2O_4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。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.

关 键 词：催化化学 铝酸铜 有机物前驱体法 尖晶石 

分 类 号：O643.36[理学—物理化学]