Reinventing Fenton Chemistry: Iron Oxychloride Nanosheet for pH-Insensitive H2O2 Activation,Environmental Science & Technology Letters

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Reinventing Fenton Chemistry: Iron Oxychloride Nanosheet for pH-Insensitive H2O2 Activation
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2018-02-20 00:00:00 , DOI: 10.1021/acs.estlett.8b00065
Meng Sun ₁ , Chiheng Chu ₁ , Fanglan Geng ₂ , Xinglin Lu ₁ , Jiuhui Qu ₃ , John Crittenden ₄ , Menachem Elimelech ₁ , Jae-Hong Kim ₁

Affiliation

This study intends to reinvent classical Fenton chemistry by enabling the Fe(II)/Fe(III) redox cycle to occur on a newly developed FeOCl nanosheet catalyst for facile hydroxyl radical (^•OH) generation from H₂O₂ activation. This approach overcomes challenges such as low operating pH and large sludge production that have prevented a wider use of otherwise attractive Fenton chemistry for practical water treatment, in particular, for the destruction of recalcitrant pollutants through nonselective oxidation by ^•OH. We demonstrate that FeOCl catalysts exhibit the highest performance reported in the literature for ^•OH production and organic pollutant destruction over a wide pH range. We further elucidate the mechanism of rapid conversion between Fe(III) and Fe(II) in FeOCl crystals based on extensive characterizations. Given the low-cost raw material and simple synthesis and regeneration, FeOCl catalysts represent a critical advance toward application of iron-based advanced oxidation in real practice.

中文翻译：

重塑Fenton化学：用于pH不敏感的H ₂ O ₂活化的三氧化二铁纳米片

这项研究旨在通过使Fe（II）/ Fe（III）氧化还原循环发生在新开发的FeOCl纳米片状催化剂上，以通过H ₂ O ₂活化产生容易的羟基自由基（^• OH）来重塑经典的Fenton化学。这种方法克服了诸如低运行pH值和大量污泥产生的挑战，这些挑战阻止了原本具有吸引力的Fenton化学方法在实际水处理中的广泛应用，尤其是通过^• OH的非选择性氧化来破坏顽固性污染物。我们证明FeOCl催化剂具有在文献中报道的最高性能^•在很宽的pH范围内产生OH和破坏有机污染物。基于广泛的表征，我们进一步阐明了FeOCl晶体中Fe（III）和Fe（II）之间快速转化的机理。鉴于廉价的原料以及简单的合成和再生，FeOCl催化剂代表了在实际实践中应用铁基高级氧化技术的关键进展。

更新日期：2018-02-21

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