Precursor-driven structural tailoring of iron oxychloride for enhanced heterogeneous Fenton activity  

作　　者：Shengshuo Xu Zhenying Lu Jinling Wang Guangtuan Huang Hualin Wang Xuejing Yang 

机构地区：[1]National Engineering Laboratory for Industrial Wastewater Treatment,East China University of Science and Technology,Shanghai 200237,China [2]State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第10期1533-1543,共11页化学科学与工程前沿（英文版）

基　　金：This work was partially supported by the National Key Projects for Fundamental Research and Development of China(Grant No.2019YFC1906700);the National Natural Science Foundation for Outstanding Young Scholars(Grant No.22222602);the National Natural Science Foundation of China(Grant No.21876049).

摘　　要：Iron oxychloride(FeOCl)is a unique layered material with tunable electronic properties.The conventional synthetic route of chemical vapor transition involves a thermodynamics-driven gas-solid interfacial reaction which often generates macroscopic crystals with stable facets.In this study,through analyzing the effects of the synthetic parameters on the FeOCl synthesis,we discovered the dominant contribution of theα-Fe_(2)O_(3)precursors on the chemical property of the FeOCl product,and subsequently developed a highly-controllable synthetic route of tailoring the FeOCl structures into small sizes and exposed high-energy facets via a facile and scalable mechanical-chemical approach.The synthesized products could be systematically tuned by the ball-milling conditions of theα-Fe_(2)O_(3)precursors.With increased milling time,the FeOCl crystallites demonstrated reduced sizes and more exposed(110)facets.Intriguingly,these smallsized FeOCl catalysts exhibited much faster Fenton-like kinetics than the pristine macroscopic FeOCl materials.Specifically,FeOCl catalysts with a 12-hour milling time showed nearly 39 times higher efficiency toward phenol degradation than the pristine FeOCl.The structure-reactivity relationship was further elucidated using the combinatory analysis via density functional theory calculation,electron paramagnetic resonance and radical quenching probe experiments.This work provides a rationale for tailoring the surface structures of FeOCl crystallites for potential applications in environmental catalysis.

关 键 词：FeOCl mechanical activation heterogeneous Fenton reaction ball milling 

分 类 号：O64[理学—物理化学]