Cu2＋掺杂的Bi2O3的制备及光催化性能的研究

Preparation and photocatalytic activity of Bi_2O_3 doped with Cu^(2+)

本文采用并流沉淀法制备了Cu2+掺杂的纳米Bi2O3光催化剂(Cu/Bi原子比分别为1%,2%,3%和4%)。以甲基橙模拟有机污染物对催化剂的光催化性能进行了考察。用比表面(BET)、X-射线粉末衍射(XRD)、X-射线光电子能谱(XPS),紫外-可见漫反射光谱(DRS)和表面光电压谱(SPS)对所制备的催化剂进行了表征。结果表明,Cu2+掺杂量为3%时制备的Bi2O3具有最高的比表面积、孔容、最小孔径和晶粒尺寸。对甲基橙的光催化脱色结果显示掺杂量为3%时Cu2+-Bi2O3表现出最佳的光催化活性。

In this paper, Cu2＋-doped Bi2O3 photocatalysts with different molar ratio of Cu/Bi （ 1% ,2% ,3 % and 4% ）were prepared by parallel flaw co-precipitation method. The prepared photocatalysts were characterized by Brunauer-Emmett Teller（BET） method, X-ray diffraction（XRD） ,X-ray photoelectron spectroscopy（XPS）, UV-Vis diffuse reflectance spectroscopy and surface photovohage spectra （SPS）. The results show that 3 % Cu2＋-Bi2O3 prepared has the highest BET surface area, pore volume, the smallest pore size and the average crystal size, 3% Cu2＋-Bi2O3 exhibits the best photocatalytie activity.