降级(电信)
化学
石墨
表征(材料科学)
化学工程
机制(生物学)
光化学
材料科学
有机化学
纳米技术
计算机科学
电信
认识论
工程类
哲学
作者
Mengjuan Xu,Hongyu Zhou,Zelin Wu,Naiwen Li,Zhaokun Xiong,Gang Yao,Bo Lai
标识
DOI:10.1016/j.jhazmat.2020.123103
摘要
Abstract Expanded graphite (EG) immobilized nickel ferrite (NiCo2O4) was successfully constructed by a simple hydrothermal approach and applied for the degradation of sulfamethoxazole (SMX) in model wastewater by peroxymonosulfate (PMS) activation. The features of prepared catalysts were characterized by SEM, TEM, EDS, XRD, BET, TPD and XPS techniques. The influences of several critical parameters including the prepared NiCo2O4-EG dosages, PMS concentrations, temperature, initial solution pH and inorganic ions on SMX removal were studied in details. In particular, the synthesized NiCo2O4-EG exhibits excellent catalytic performances for SMX depredation over a wide pH range (pH 3.0–11.0). Besides, the transformation of various reactive oxygen species (SO4 −, HO , O2 − and 1O2) with the change of initial pH was investigated by the electron paramagnetic resonance (EPR) and quenching tests. In addition, twelve major degradation intermediates of SMX were detected by UPLC-QTOF-MS/MS. Finally, the PMS activation mechanism in NiCo2O4-EG/PMS system by the synergistic coupling of EG and NiCo2O4 were put forward. In brief, this work provided a promising and potential catalyst for PMS activation to remove SMX from wastewater.
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