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首页> 外文期刊>Catalysis science & technology >Prussian blue/TiO2 nanocomposites as a heterogeneous photo-Fenton catalyst for degradation of organic pollutants in water
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Prussian blue/TiO2 nanocomposites as a heterogeneous photo-Fenton catalyst for degradation of organic pollutants in water

机译：普鲁士蓝/TiO2纳米复合材料作为水中有机污染物降解的异质光丝催化剂

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摘要

Nowadays, a lot of research focuses on accelerating Fe-II/Fe-III redox cycles to increase the pseudo first-order rates of the Fenton reaction. Here, Prussian blue/titanium dioxide nanocomposites (PB/TiO2 NPs) were designed as heterogeneous photo-Fenton catalysts to increase the Fe-II recovery in degrading organic contaminants in water for the first time. The PB/TiO2 NPs were characterized by various analytical techniques to obtain the optimum ratio of PB and TiO2 for efficient degradation of organics. The performance of the catalysts was tested by following the removal of rhodamine B dye, salicylic acid, m-cresol, and isophorone under various conditions (pH, ratios of PB and TiO2, H2O2, and temperature). Formation of the intermediates of iron (Fe-II/Fe-III) in the studied system using Mossbauer spectroscopy was explored for the first time and presents important insights into the relevant catalytic phenomena. The generation of (OH)-O-center dot radicals in the reaction system was identified using electron paramagnetic resonance spectroscopic techniques. Results demonstrated that the developed PB/TiO2 NPs were stable and could degrade organic contaminants in water efficiently.
机译：如今，许多研究重点是加速FE-II/FE-III氧化还原周期，以提高芬顿反应的伪一阶速率。在这里，普鲁士蓝/二氧化钛纳米复合材料（PB/TIO2 NPS）被设计为异质光芬顿催化剂，以增加水中降解有机污染物的Fe-II回收率。 PB/TIO2 NP的特征是各种分析技术，以获得PB和TIO2的最佳比率，以有效地降解有机物。通过在各种条件下（pH，PB和TIO2，H2O2和温度的比率）去除催化剂的性能，通过除去若丹明B染料，水杨酸，M-Cresol和同酮。首次探索了使用Mossbauer光谱的研究系统中铁（Fe-II/Fe-III）的中间体的形成，并首次探讨了对相关催化现象的重要见解。使用电子顺磁共振光谱技术鉴定了反应系统中（OH） - 中心点自由基的产生。结果表明，开发的PB/TIO2 NP稳定，可以有效地降解有机污染物。

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