尖晶石型铁酸铜的制备及其可见光催化性能

Preparation and Catalytic Properties of Spinel CuFe_2O_4 under Visible Light Irradiation

利用水热法和共沉淀法制备了尖晶石型纳米铁酸铜,表征了铁酸铜的微观结构和光谱性能,并以罗丹明B溶液作为目标污染物,研究了铁酸铜催化剂的可见光催化性能.结果表明:水热法所制备的铁酸铜的微观形貌为直径约200 nm的纳米球形,两种方法制备的铁酸铜在紫外-可见光谱区均有较强的光吸收.罗丹明B溶液的初始浓度、催化剂的制备方法、催化剂的投加量及H2O2的加入对染料的光催化降解效果均有影响.以0.05 g水热法制备的铁酸铜为催化剂,加入0.1 mL H2O2,降解50 mL 20 mg/L罗丹明B溶液,120 min后降解率能够达到96%以上.

Spinel CuFe2O4 nanoparticles were prepared by hydrothermal and coprecipitation methods, and their microstructures and spectral properties were characterized using various instrumental analysis techniques. The visible light induced photocatalytic activity of the samples was studied using Rhodamine B （Rh B ） solution as the target pollutant. The results indicate that CuFe2O4 nanoparticles synthesized via hydrothermal way are nanospheres with diameters about 200 nm, and the catalysts prepared with the two methods show relatively strong absorption in the UV-visible spectral region. The photocatalytic degradation of dyes is influenced by the initial concentration of Rh B solution, the preparation methods and the dosage Of the catalysts and the addition of H2O2. The degradation rate of Rh B （50 ml 20 mg/L） reaches 96% with the synergistic action of CuFe2O4 （0.05 g, hydrothermal）, H2O2 （0.1 mL） with visible light irradiation （120 min）.