【摘要】 通过简单的两步水热法合成CoFe₂O₄/CoFe₂S₄复合物.扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）及X射线光电子能谱（XPS）物性表征表明,CoFe₂O₄/CoFe₂S₄复合物由纳米片和纳米花颗粒混杂构成.与CoFe₂O₄相比,原位硫化引入轻微缺陷可以增加活性位点,从而促进CoFe₂O₄/CoFe₂S₄复合物的氧化还原活性,赋予CoFe₂O₄/CoFe₂S₄催化过一硫酸盐（PMS）体系更优异的氧化降解能力.进一步的参数优化实验表明,CoFe₂O₄/CoFe₂S₄与PMS体系氧化降解黄连素的最佳条件为1mg/L CoFe₂O₄/CoFe₂S₄、0.8mmol/L PMS、温度40℃、pH 7.0,该条件下黄连素的降解率在60min内可达98.4%.CoFe₂O₄/CoFe₂S₄循环使用3次后,黄连素降解率依然在90%以上.电子顺磁共振（EPR）研究表明,CoFe₂O₄/CoFe₂S₄与PMS体系产生的主要活性氧化物种为■自由基抑制实验证明,■是降解黄连素的主要活性物种.更多还原

【Abstract】 The CoFe₂O₄/CoFe₂S₄ composite is synthesized by a simple two-step hydrothermal method. Scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS） characterization of physical properties show that the CoFe₂O₄/CoFe₂S₄ composite is composed of nanosheets and nanoflower particles. Compared with CoFe₂O₄, the introduction of slight defects by in-situ vulcanization can increase the active sites, thereby promoting the redox activity of the CoFe₂O₄/CoFe₂S₄ composite, and giving the CoFe₂O₄/CoFe₂S₄ catalytic peroxymonosulfate（PMS） system a better oxidative degradation ability. Further parameter optimization experiments show that the optimal conditions for the oxidative degradation of berberine by the CoFe₂O₄/CoFe₂S₄ and PMS system are 1 mg/L CoFe₂O₄/CoFe₂S₄, 0.8 mmol/L PMS, temperature of 40 ℃, pH of 7.0. Under these conditions, the degradation rate of berberine can reach 98.4% within 60 min. After three cycles of CoFe₂O₄/CoFe₂S₄, the degradation rate of berberine is still above 90%. Electron paramagnetic resonance（EPR） studies show that the main active oxide species produced by the CoFe₂O₄/CoFe₂S₄ and PMS system are ■; free radical suppression experiments prove that ■ is the main active species that degrades berberine.更多还原