文献类型：期刊文献

英文题名：Visible Light-Driven Selective Organic Degradation by FeTiO3/Persulfate System: the Formation and Effect of High Valent Fe(IV)

作者：Pan, Lihan[1,2];Shi, Wen[1,2];Sen, Tapas[3];Wang, Lingzhi[1,2];Zhang, Jinlong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Fine Chem,Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Fine Chem,Joint Int Res Lab Precis Chem & Mo, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Univ Cent Lancashire, Sch Phys Sci & Comp, Ctr Mat Sci, Preston, Lancs, England

年份：2021

卷号：280

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20203509096814);WOS:【SCI-EXPANDED(收录号:WOS:000572833100010)】；

基金：This work was supported by the National Natural Science Foundation of China (21673073, 21677048, 5171101651 and 21811540394), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), the Programme of Introducing Talents of Discipline to Universities (B20031, B16017), Shanghai Municipal Science and Technology (18520710200 and 17520711500) and the Fundamental Research Funds for the Central Universities (222201717003).

语种：英文

外文关键词：FeTiO3; persulfate; high valent Fe(IV); irradiation; selective degradation

摘要：The role of high-valent Fe has rarely been explored in persulfate-based heterogeneous reaction. Herein, the existence of Fe(IV) is verified in a visible light-assisted FeTiO3/persulfate system using methyl phenyl sulfoxide as the probe. The FeTiO3/persulfate/light system is capable of selectively degrading aromatic compounds with lower ionization potentials including tetracycline and bisphenol A by photo-generated high-valent Fe(IV). The contributions from SO4 center dot-, (OH)-O-center dot and O-1(2) are excluded. The comparable efficiency in the dark requires higher dosages and suffers from a rapid deactivation. Based on XPS, Raman and EPR analyses, the poor dark activity is caused by the formation of a complex between in situ formed Fe(III) and SO(4)(2-)on the FeTiO3 surface; this complex is, however, the key intermediate for Fe(IV) production under the light irradiation. This study reveals the long-ignored role of SO42- as an abundant species in iron-based persulfate systems. We also call for re-evaluating the real oxidation mechanism in other persulfate-based reactions considering the different oxidation mechanisms of radicals and high-valent iron.