罗丹明B
催化作用
可重用性
纳米颗粒
降级(电信)
电子顺磁共振
化学工程
分解
激进的
磁性纳米粒子
材料科学
化学
多相催化
核化学
纳米技术
光催化
有机化学
核磁共振
电信
物理
软件
计算机科学
工程类
程序设计语言
作者
Wei Luo,Lihua Zhu,Nan Wang,Heqing Tang,Ming Cao,Yuanbin She
摘要
BiFeO(3) magnetic nanoparticles (BFO MNPs) were prepared with a sol-gel method and characterized as a catalyst. It was found that BFO MNPs effectively catalyzed the decomposition of H(2)O(2) into *OH radicals, being confirmed with electron spin resonance spin-trapping technique and other radical probing techniques. The strong H(2)O(2)-activating ability of BFO MNPs showed promising applications in the oxidative degradation of organic pollutants. When BFO MNPs were used as a heterogeneous Fenton-like catalyst to degrade Rhodamine B, the apparent rate constant for the RhB degradation at 25 degrees C at pH 5.0 in the BFO MNPs-H(2)O(2) system was evaluated to be 2.89 x 10(-2) min(-1), being about 20 folds of that obtained with Fe(3)O(4) MNPs as the catalyst under similar conditions. Moreover, BFO MNPs were demonstrated to have excellent stability and reusability. The catalytic mechanism of BFO MNPs was also investigated with Monte Carlo simulations and density functional theory calculations.
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