【摘要】 利用静电自组装法,将羧甲基纤维素（CMC）组装到Fe₃O₄上得到Fe₃O₄@CMC,再通过自由基聚合反应将丙烯酸（AA）和丙烯酰胺（A M）接枝交联到Fe₃O₄@C M C上,制备出Fe₃O₄@CMC-g-p（AA-co-AM）（Fe₃O₄@hydrogel）微球。利用TEM、XRD、FTIR、TGA、XPS、BET等技术对Fe₃O₄hydrogel微球进行了表征,并将其作为催化剂应用于类芬顿高级氧化反应中催化降解酸性红73。结果表明:Fe₃O₄@hydrogel仍为反尖晶石型结构,共聚物CMC-g-p（AA-co-AM）成功包覆在Fe₃O₄表面,且含量为17.7%,复合微球平均粒径在10nm左右,饱和磁化强度为44.8emu/g,BET表面积为73.5m2/g,平均孔直径为8.3nm,为介孔结构。Fe₃O₄@hydrogel微球对酸性染料废水有良好的催化降解性能,通过调节芬顿反应体系中初始p H值、催化剂用量以及H2O2浓度,得到反应最适条件为p H3.5、H₂O₂10m m ol/l、催化剂用量200mg/l。在此条件下3h内能达到对酸性红7399.83%以上的降解。更多还原

【Abstract】 Fe₃O₄@CMC-g-p（A A-co-A M）（Fe₃O₄@hyd rogel） microspheres were prepared by electrostatic self-assembly method and radical polymerization reaction. The as-prepared microspheres were characterized by TEM, XRD, FTIR, TGA, XPS and BET techniques. Fe₃O₄@hydrogels were used for degradation of Acid Red 73（AR73） through Fenton advanced oxidation reaction. It was found that Fe₃O₄@hydrogel was still anti-spinel structure and copolymer CMC-g-p（AA-co-AM） was successfully coated on Fe₃O₄ surface. The content of hydrogel in the particles was 17.7%. The average diameters of the composite microspheres was about 10 nm. The saturation magnetization intensity was 44.8 emu/g, the BET surface area was 73.5 m²/g. Fe₃O₄@hydrogel microspheres exhibited excellent catalytic degradation performance for acidic dye wastewater. The optimal reaction conditions were initial solution p H of 3.5, H₂O₂ of 10 mmol/L and catalyst dosage of 200 mg/l. Under this condition, up to 99.83% of the AR73 can be degraded within 3 h.更多还原