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采用超声辅助反向共沉淀法制得磁纳米Fe3O4颗粒,然后以磁纳米Fe3O4颗粒为种子采用种子乳液聚合法制得羟基功能化的磁纳米复合物微球,再以三聚氯氰为桥联剂键合氯化血红素制得磁微球负载氯化血红素仿酶催化剂.利用傅里叶变换红外光谱仪(FT-IR)、配置积分球的紫外-可见(UV-Vis)分光光度计、透射电子显微镜(TEM)、热重分析仪(TGA)和振动样品磁强计(VSM)对催化剂进行了表征.结果表明,催化剂粒径大小为10～12 nm,粒度均一,分散性好,在300 K下具有一定顺磁性,饱和磁化强度为21.61 emu/g,磁性物质含量为52.50%.催化剂在紫外光照和H2O2存在下对水中邻苯二甲酸二甲酯(DMP)有较高的氧化降解活性,且重复使用效果较好.
The magnetic nano-Fe3O4 particles were prepared by ultrasonic assisted reverse coprecipitation method, and then the hydroxyl-functionalized magnetic nanocomposite microspheres were prepared by seed emulsion polymerization using magnetic nano-Fe3O4 particles as seeds. Cyanuric chloride Hemin-loaded hemin-loaded hemin-like enzyme catalyst was prepared by using hemin as a carrier.Using Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectrophotometer equipped with integrating sphere, TEM, TGA and VSM were used to characterize the catalyst.The results showed that the size of catalyst was 10 ~ 12 nm with uniform particle size and good dispersion, Under the UV light and H2O2 conditions, the catalyst has a higher oxidative degradation activity to dimethyl phthalate (DMP) in water, and has a higher paramagnetic saturation magnetization of 21.61 emu / g and a magnetic material content of 52.50% And repeated use of better.