摘要
本文以三乙基胺为矿化剂,用溶胶–凝胶法在碱性条件下成功制备了FeTiO3微粒,进行了X射线衍射、扫描电镜、等电点测试等表征,并探究了其作为多相类Fenton催化剂对水体中的不同有机污染物的催化降解性能。结果表明FeTiO3微粒在pH~3、25℃时可有效催化H2O2降解橙黄G (OG)、甲硝唑、亚甲基蓝等模型污染物。以降解OG为例考察了FeTiO3微粒的循环使用性能,循环使用五次后其催化降解性能仍保持不变,2 h可完全降解OG (25 mg/L),COD去除率达57%~69%,对应的一级动力学速率常数为0.175 min−1。
In this paper, FeTiO3 particles were prepared by a modified solgel method and characterized by X-ray diffraction, scanning electron microscopy, measurement of isoelectric point, etc. The catalytic performance of FeTiO3 as a heterogeneous Fenton-like catalyst in the degradation of various organic pollutants in water was investigated. The results showed that FeTiO3 particles could effectively cat-alyze H2O2 for the degradation of orange G (OG), metronidazole and methylene blue at pH ~3 and 25˚C. The recyclability of FeTiO3 particles was tested by taking the degradation of OG as an example. The catalytic activity of FeTiO3 particles in the degradation of OG remained unchanged after five cycles, that is, OG (25 mg/L) could be completely degraded within 2 h with the COD removal rates of 57%~69% and the corresponding first-order kinetic rate constant of 0.175 min−1.
出处
《材料科学》
CAS
2022年第3期194-201,共8页
Material Sciences
