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Spontaneous Fenton-like dye degradation in clustered-petal di-manganese copper oxide by virtue of self-cyclic redox couple
Journal of Environmental Chemical Engineering ( IF 7.7 ) Pub Date : 2021-07-21 , DOI: 10.1016/j.jece.2021.106094
Sourav Bhowmick 1 , Ching Thian Moi 1 , Nitul Kalita 1 , Alpana Sahu 1 , Shipra Suman 1 , Mohammad Qureshi 1
Affiliation  

Stable and earth abundant metal containing oxides can be a good model system for practical dye degradations at industrial scale. In particular, metal oxides having mixed valence states can be good candidates, as they offer readily available intermediates useful in dye degradations. Here in we have proposed, a di-manganese copper oxide (Mn2CuO4) with clustered-petal morphologies, having mixed-valence states of Mn (III/IV) and Cu (II/I) is utilized for the industrial dye degradation process. A Fenton-like reaction pathway is observed in degrading RhodamineB (k = 7.15 ×10-2 min-1) following first-order reaction kinetics. The high catalytic activity of Mn2CuO4 is due to the co-existent redox cycle (Mn(III) + Cu(II) ↔ Mn(IV) + Cu(I)), operating within the system. The versatility of Mn2CuO4 in dye degradation is verified using a host of textile-related dyes in the present study. Potential reusability and stability in wide pH range of the catalyst are also examined and found to be suitable for commercial purposes.



中文翻译:

利用自循环氧化还原对在簇状二锰氧化铜中自发性类芬顿染料降解

稳定且富含地球的金属氧化物可以成为工业规模实际染料降解的良好模型系统。特别是,具有混合价态的金属氧化物可能是很好的候选者,因为它们提供了可用于染料降解的容易获得的中间体。在此我们提出,具有簇状花瓣形态的二锰氧化铜 (Mn 2 CuO 4 ) 具有 Mn (III/IV) 和 Cu (II/I) 的混合价态,可用于工业染料降解过程。在一级反应动力学之后,在降解罗丹明B ( k = 7.15 ×10 -2  min -1 ) 中观察到类似芬顿的反应途径。Mn 2 CuO 4的高催化活性是由于共存的氧化还原循环 (Mn(III) + Cu(II) ↔ Mn(IV) + Cu(I)) 在系统内运行。在本研究中,使用大量与纺织品相关的染料验证了 Mn 2 CuO 4在染料降解中的多功能性。还检查了催化剂在宽 pH 范围内的潜在可重复使用性和稳定性,发现它们适用于商业目的。

更新日期:2021-07-22
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