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介绍了一种采用无毒廉价的前驱物制备Fe3O4@SiO2-Ag磁性纳米微球的快捷方法,制备的Fe3O4@SiO2-Ag纳米微球在NaBH4存在下可以催化还原染料污染物.实验结果表明,Fe3O4@SiO2-Ag磁性纳米粒子保持了Ag纳米粒子和Fe3O4纳米粒子的双重优点,不仅对染料罗丹明B和曙红Y具有良好的催化还原效率,而且可以在外加磁场作用下从溶液中快速有效的分离.催化还原反应速率与反应温度及Fe3O4@SiO2-Ag催化剂用量有关,反应体系中表面活性剂和无机盐(Na2SO4)的存在也会影响催化剂的催化活性.该Fe3O4@SiO2-Ag磁性纳米粒子在工业染料污染物处理方面具有应用前景.
A fast method for preparing Fe3O4 @ SiO2-Ag magnetic nanospheres using non-toxic and inexpensive precursors was introduced. The prepared Fe3O4 @ SiO2-Ag nanospheres can catalyze the reduction of dye contaminants in the presence of NaBH4. The experimental results show that Fe3O4 @ Fe3O4 @ SiO2-Ag magnetic nanoparticles maintain the dual advantages of Ag nanoparticles and Fe3O4 nanoparticles, which not only has good catalytic reduction efficiency for rhodamine B and eosin Y, but also can be rapidly and effectively applied from an aqueous solution under the action of an applied magnetic field The catalytic reduction reaction rate was related to the reaction temperature and the amount of Fe3O4 @ SiO2-Ag catalyst, and the presence of surfactants and inorganic salts (Na2SO4) also affected the catalytic activity of the catalyst.The Fe3O4 @ SiO2-Ag magnetic nano Particles have potential applications in the treatment of industrial dye contaminants.