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Facet-dependent photoactivity of Mn3O4/BiOCl for naproxen detoxication: Strengthening effect of Mn valence cycle
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2021-09-07 , DOI: 10.1016/j.apcatb.2021.120672
Runren Jiang 1 , Guanghua Lu 1 , Min Wang 1 , Tianjian Dang 1 , Jianchao Liu 1 , Zhenhua Yan 1
Affiliation  

Utilizing photocatalysis to degrade pollution is emerging as a promising way to treat wastewater, but is challenged by low efficiency and scanty toxicity cognition. In this work, Mn3O4/BiOCl based crystal plane engineering systems are applied for naproxen (NPX) degradation, and Mn3O4/BiOCl010 displayed better degradation rate, which is 16 and 8 times than that of the Mn3O4/BiOCl001 and BiOCl010. According to the degradation pathway analysis and biological toxicity experiments, the toxicity of the degradation solution increased first and then decreased, which may be caused by the mineralization of NPX and more toxic intermediates. Affected by the distinct internal charge transfer directions of the two crystal planes of BiOCl, Mn3O4/BiOCl010 heterojunction system has a faster charge transform than that of Mn3O4/BiOCl001. Moreover, the valence cycle of Mn can further accelerate the charge transfer, which can also provide a powerful driving force for NPX elimination.



中文翻译:

用于萘普生解毒的 Mn3O4/BiOCl 的晶面依赖性光活性:Mn 价循环的强化作用

利用光催化降解污染正在成为一种有前途的废水处理方法,但面临着效率低下和毒性认知不足的挑战。在这项工作中,基于Mn 3 O 4 /BiOCl 的晶面工程系统用于萘普生(NPX) 降解,Mn 3 O 4 /BiOCl 010显示出更好的降解率,是Mn 3 O 的16 和8 倍。4 /BiOCl 001和 BiOCl 010. 根据降解途径分析和生物毒性实验,降解液的毒性先升高后降低,可能是NPX矿化及毒性较大的中间体所致。受BiOCl两个晶面不同的内部电荷转移方向的影响,Mn 3 O 4 /BiOCl 010异质结体系比Mn 3 O 4 /BiOCl 001具有更快的电荷转换。此外,Mn 的价循环可以进一步加速电荷转移,这也可以为 NPX 的消除提供强大的驱动力。

更新日期:2021-09-12
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