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首页> 外文期刊>Catalysis science & technology >Visible-light-induced photocatalysis and peroxymonosulfate activation over ZnFe2O4 fine nanoparticles for degradation of Orange II
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Visible-light-induced photocatalysis and peroxymonosulfate activation over ZnFe2O4 fine nanoparticles for degradation of Orange II

机译：Visible-light-induced光催化和peroxymonosulfate激活在ZnFe2O4罚款纳米粒子退化的橙色

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Refractory and non-biodegradable pollutants produced by industries have inevitably brought great threat to human life. Integrating several kinds of advanced oxidation processes (AOPs) into one system has been proposed to be an efficient strategy to remove such pollutants from the environment at low cost. In this study, magnetic zinc ferrite fine nanoparticles, firstly synthesized by a novel soft chemical solution process, showed super reactivity, good reusability and easy separation ability for visible-light-induced Orange II degradation in an integrated ZnFe2O4/PMS (peroxymonosulfate, 2KHSO(5)center dot KHSO4 center dot K2SO4, OXONE) aqueous system. Powder X-ray diffraction, transmission electron microscopy, and Fe-57 Mossbauer and X-ray photoelectron spectroscopy were employed to characterize the structure and morphology as well as recognize the physicochemical changes of the fine nanoparticles before and after the reaction. The generated oxidizing intermediates during the degradation process were detected by electron paramagnetic resonance spectroscopy and classic quenching experiments, which confirmed that both sulfate radical (SO4 center dot-) and hydroxyl radical (. OH) co-existed in the degradation process. The systematic condition experiments further verified the dual functionality of the ZnFe2O4/PMS system, which actively acted as a photocatalyst and a PMS activator for dye molecule oxidation under visible light irradiation. This study proves that photocatalysis and PMS activation for remediation of organic pollutants in water can be easily integrated into one system by using zinc ferrite nanoparticles as an environmentally friendly catalyst.
机译：耐火材料和降解污染物由行业已经不可避免地带来了人类生命安全的巨大威胁。种先进的氧化过程(aop)一个系统提出了一种有效的去除这些污染物从策略以低成本的环境。锌铁氧体纳米粒子,首先合成了一种新型软化学解决方案过程,显示超级反应性,很好可重用性和简单的分离能力visible-light-induced橙色II退化的综合ZnFe2O4 / PMS (peroxymonosulfate2 khso点等特点中心点K2SO4(5)中心,硫酸氢钾)水系统。透射电子显微镜,Fe-57穆斯堡尔和x射线光电子能谱是用来描述结构和形态以及识别细的纳米粒子的物理化学变化之前和之后的反应。氧化降解中间体过程检测到电子顺共振光谱和经典的淬火实验,证实了这两种硫酸激进的(SO4中心点)和氢氧自由基(。哦)共存的退化过程。系统的条件实验进一步验证ZnFe2O4 / PMS系统的双重功能,积极作为光催化剂,经前综合症催化剂对染料分子氧化可见光照射。光催化和PMS激活修复有机污染物在水中很容易集成到一个系统通过使用锌铁氧体纳米粒子作为环境友好型催化剂。

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