Highly Efficient Fe(III)-initiated Self-cycled Fenton System in Piezo-catalytic Process for Organic Pollutants Degradation.
Highly Efficient Fe(III)-initiated Self-cycled Fenton System in Piezo-catalytic Process for Organic Pollutants Degradation.
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DOI：
10.1002/anie.202307018
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发表时间：
2023-06
影响因子：
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通讯作者：
Jing-yu Xu;Q. Zhang;Xin Gao;Peifang Wang;Huinan Che;Chunmei Tang;Y. Ao
中科院分区：
文献类型：
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作者：
Jing-yu Xu;Q. Zhang;Xin Gao;Peifang Wang;Huinan Che;Chunmei Tang;Y. Ao
压电催化自芬顿（PSF）体系是一种新兴的废水处理技术，但O2还原性过氧化氢（H2 O2）的产生和Fe（III）还原的竞争严重限制了反应动力学。在这里，我们开发了一种双电子水氧化H2 O2生产（WOR-H2 O2）加上Fe（III）还原超过Fe（III）/BiOIO 3压电催化剂的高效PSF。发现Fe（III）的存在可以同时引发WOR-H2 O2和Fe（III）还原为Fe（II），从而使得能够快速反应动力学朝向随后的H2 O2/Fe（II）的芬顿反应。Fe（III）引发的PSF系统提供了优异的自循环降解污染物，磺胺甲恶唑（SMZ）的降解速率常数超过经典Fe（II）-PSF系统的3.5倍。该研究为构建高效PSF体系提供了新的视角，并打破了Fe（III）在芬顿反应中的先入为主的观念。
Piezo-catalytic self-Fenton (PSF) system has been emerging as a promising technique for wastewater treatment, while the competing O2 reductive hydrogen peroxide (H2O2) production and Fe(III) reduction seriously limited the reaction kinetics. Here, we develop a two-electron water oxidative H2O2 production (WOR-H2O2) coupled with Fe(III) reduction over a Fe(III)/BiOIO3 piezo-catalyst for highly efficient PSF. It is found that the presence of Fe(III) can simultaneously initiate the WOR-H2O2 and reduction of Fe(III) to Fe(II), thereby enabling a rapid reaction kinetics towards subsequent Fenton reaction of H2O2/Fe(II). The Fe(III) initiating PSF system offers exceptional self-recyclable degradation of pollutants with a degradation rate constant for sulfamethoxazole (SMZ) over 3.5 times as that of the classic Fe(II)-PSF system. This study offers a new perspective for constructing efficient PSF systems and shatters the preconceived notion of Fe(III) in the Fenton reaction.