New insights in the dihydroxybenzenes-driven Fenton reaction: electrochemical study of interaction between dihydroxybenzenes and Fe(III).
New insights in the dihydroxybenzenes-driven Fenton reaction: electrochemical study of interaction between dihydroxybenzenes and Fe(III).
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二羟基苯驱动的芬顿反应的新见解：二羟基苯与 Fe(III) 之间相互作用的电化学研究。
DOI：
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发表时间：
2011
影响因子：
2.7
通讯作者：
P. Vanýsek
中科院分区：
文献类型：
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作者：
D. Contreras;J. Rodríguez;L. Basáez;J. Freer;R. Valenzuela;H. Mansilla;P. Vanýsek
有报道称，二羟基苯（DHB）驱动的Fenton反应比简单的Fenton反应更有效地降解难降解底物。DHB驱动的Fenton反应活性增强的原因尚不清楚，但这可能是由于DHB与Fe（III）形成的络合物的氧化还原电位发生了变化，或者形成了不同于经典Fenton反应的氧化剂。采用循环伏安法研究了铁（III）与DHBs 1,2-二羟基苯（儿茶酚，CAT）、2,3-二羟基苯甲酸（2,3- dhba）、3,4-二羟基苯甲酸（3,4- dhba）和1,2-二羟基-3,5-苯二磺酸盐（TIRON）之间的氧化还原反应，以更好地了解DHB驱动Fenton反应的增强反应活性。确定铁（III）与DHBs氧化还原反应产生的铁（II）量不足以解释反应性增强。DHBs/Fe（III）体系的循环伏安图（CV）显示出准可逆或不可逆的行为，并且阳极峰也发生移位和分裂。这种效应可能与铁（III）氧化DHBs有关，但与真正的相互作用无关。
It has been reported that the dihydroxybenzene (DHB) driven Fenton reaction is more efficient to degrade recalcitrant substrates than the simple Fenton reaction. The enhanced reactivity of the DHB driven Fenton reaction is not clear, but it could be explained by the formation of oxidant species different from the ones formed by classical Fenton reaction or by the shift of the redox potential of the complex formed by DHB and Fe(III). The redox reaction between Fe(III) and the DHBs 1,2-dihydroxybenzene (catechol, CAT), 2,3-dihydroxybenzoic acid (2,3-DHBA), 3,4-dihydroxybenzoic acid (3,4-DHBA), and 1,2-dihydroxy-3,5-benzenedisulfonate (TIRON) was studied by cyclic voltammetry to better understand the enhanced reactivity of the DHB driven Fenton reaction. It was determined that the amount of Fe(II) produced by the redox reaction between Fe(III) and DHBs was insufficient to explain the enhanced reactivity. Cyclic voltammograms (CV) of the DHBs/Fe(III) systems show a quasi-reversible or irreversible behavior and also shifting and splitting the anodic peaks. This effect can be related to DHBs oxidation by Fe(III), but not to a real interaction.