纳米铁酸铜催化过硫酸盐降解酸性红FRL

采用共沉淀法-焙烧制备纳米铁酸铜催化剂,利用扫描电镜(SEM)、X射线光电子能谱(XPS)和X射线衍射 (XRD)对催化剂进行表征。以酸性红FRL为降解目标物,研究此催化剂催化过硫酸钠降解酸性红FRL的性能。考察了氧化剂浓度、催化剂用量和初始染料浓度对降解的影响。结果表明:催化剂经700 ℃焙烧3 h,可得到完整晶相的CuFe2O4;当初始污染物浓度为20 mg/L,过硫酸盐浓度为2.0 g/L,催化剂用量为2.0 g/L时,降解2.5 h,酸性红FRL染料溶液的降解率可达85.3%。实验所得催化剂可重复使用5次,同时酸性红FRL降解过程遵循准一级动力学方程。

Degradation of Acid Red FRL by persulfate with nanometer copper ferrite as catalyst

Nanometer-sized copper ferrite catalysts were prepared through a co-precipitation-calcination method and were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray powder diffraction (XRD). The degradation performance by persulfate was investigated through the catalyst with Acid Red FRL as the target pollutant. The effects of factors such as concentration of oxidant, dosage of catalyst, and initial concentration of pollutants were studied. The results showed that the catalyst could achieve the complete crystal phase of CuFe2O4 after roasting for 3 h at 700 ℃. The degradation rate of Acid Red FRL reached 85.3% after 2.5 h under certain conditions (initial Acid Red FRL concentration of 20 mg/L, oxidant concentration of 2.0 g/L, catalyst dosage of 2.0 g/L). The catalyst could be used repeatedly five times, and the degradation of Acid Red FRL followed a pseudo-first-order kinetics equation.