催化学报

• 研究论文 • 上一篇    下一篇

可回收Fe3O4@SiO2-Ag磁性纳米微球对染料污染物的快速脱色处理

孙丽娟a, 何疆a, 安松松a, 张军伟b, 郑金敏a, 任栋a   

  1. a 兰州大学功能有机分子化学国家重点实验室, 甘肃兰州 730000;
    b 兰州大学磁学与磁性材料教育部重点实验室, 甘肃兰州 730000
  • 收稿日期:2013-01-14 修回日期:2013-03-28 出版日期:2013-07-16 发布日期:2013-07-16
  • 通讯作者: 何疆
  • 基金资助:

    国家自然科学基金(J1103307);甘肃省自然科学基金(3ZS041-A25-009).

Recyclable Fe3O4@SiO2-Ag magnetic nanospheres for the rapid decolorizing of dye pollutants

SUN Lijuana, HE Jianga, AN Songsonga, ZHANG Junweib, ZHENG Jinmina, REN Donga   

  1. a State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, Gansu, China;
    b Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, Gansu, China
  • Received:2013-01-14 Revised:2013-03-28 Online:2013-07-16 Published:2013-07-16
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (J1103307) and the Natural Science Foundation of Gansu Province in China (3ZS041-A25-009).

摘要: 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.

关键词: 四氧化三铁纳米颗粒, 催还还原, 染料, 可回收催化剂

Abstract: A simple electroless plating method using non-toxic, cost-effective precursors to fabricate Fe3O4@SiO2-Ag nanospheres for catalytic reduction of dye pollutants is developed. Incorporating the individual advantages of Ag and Fe3O4 nanoparticles, the Fe3O4@SiO2-Ag nanospheres exhibit enhanced catalytic reduction efficiency for rhodamine B and eosin Y compared with those of pure Ag or Fe3O4 nanoparticles, and can also be rapidly separated from aqueous solution using a magnet. The catalytic reaction rate is strongly dependent on both reaction temperature and Fe3O4@SiO2-Ag dosage. The presence of surfactants and inorganic salt (Na2SO4) influences the catalytic activity of the Fe3O4@SiO2-Ag nanospheres. Fe3O4@SiO2-Ag nanospheres show great promise for the treatment of industrial dye pollutants.

Key words: Fe3O4@SiO2-Ag nanocomposite, Catalytic reduction, Dye, Recyclable catalyst