Comparative studies on Fenton-like reactions catalyzed by Fe_(3)O_(4) loaded inside and outside halloysite nanotubes for the removal of organic pollutants  

作　　者：Yang Li Jia-Qi Zhou Huan-Yan Xu Li-Min Dong Mao-Chang Cao Lian-Wei Shan Li-Guo Jin Xiu-Lan He Shu-Yan Qi 

机构地区：[1]Heilongjiang Provincial Key Laboratory of CO_(2) Resource Utilization and Energy Catalytic Materials,School of Materials Science and Chemical Engineering,Harbin University of Science and Technology,Harbin 150040,China

出　　处：《Frontiers of Materials Science》2024年第1期15-28,共14页材料学前沿（英文版）

基　　金：supported by the Natural Science Foundation of Heilongjiang Province,China(Grant No.LH2022E083).

摘　　要：In this work,Fe_(3)O_(4) nanoparticles(NPs)loaded inside and outside halloysite nanotubes(HNTs)were prepared and developed as the heterogeneous Fenton-like catalysts for the removal of representative organic pollutants.Characterization results indicated that the samples with Fe_(3)O_(4) NPs loaded outside the HNTs lumen(Fe_(3)O_(4)/HNTs)and inside the HNTs lumen(Fe_(3)O_(4)@HNTs)were successfully prepared.Both samples had typical magnetic hysteresis loops,while Fe_(3)O_(4)@HNTs exhibited higher magnetization intensity.The comparative experiments showed that Fe_(3)O_(4)@HNTs had better Fenton-like catalytic ability than that of Fe_(3)O_(4)/HNTs in the degradation of various organic pollutants.Taking Rhodamine B(RhB)as an example,the adsorption thermodynamics and kinetics of RhB onto Fe_(3)O_(4)/HNTs and Fe_(3)O_(4)@HNTs were also investigated.The comparative results demonstrated that the adsorption ability of Fe_(3)O_(4)/HNTs was better than that of Fe_(3)O_(4)@HNTs.Moreover,the dissolved concentration of Fe^(2+)and production amount of hydroxyl radical(·OH)in the Fe_(3)O_(4)@HNTs-H_(2)O_(2) system were significantly higher than those in the Fe_(3)O_(4)/HNTs-H_(2)O_(2) system.Based on aforementioned comparison,the nano-confinement effect in the Fe_(3)O_(4)@HNTs-H_(2)O_(2) system was verified.This work provides meaningful guidance for the cheap and convenient design of nanoreactors for Fenton-like applications.

关 键 词：Fe_(3)O_(4) halloysite nanotube adsorption Fenton-like reaction mechanism 

分 类 号：O64[理学—物理化学]