高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (11): 2500.doi: 10.7503/cjcu20180450

• 物理化学 • 上一篇    下一篇

Fe3O4/TiO2@生物碳骨架复合材料的一步法制备及UV-Fenton催化性能

于晓丹1,2, 林鑫辰3, 冯威2,3, 李伟光1()   

  1. 1. 哈尔滨工业大学环境学院, 哈尔滨 150090
    2. 吉林建筑大学松辽流域水环境教育部重点实验室, 长春 130118
    3. 吉林大学环境与资源学院, 长春 130021
  • 收稿日期:2018-06-22 出版日期:2018-11-10 发布日期:2018-09-10
  • 作者简介:联系人简介: 李伟光, 男, 博士, 教授, 主要从事高级氧化技术研究. E-mail: hitliwg@126.com
  • 基金资助:
    国家自然科学基金(批准号: 61774073)资助.

One-step Preparation and UV-Fenton Properties of Fe3O4/TiO2@Bio-carbon Composities

YU Xiaodan1,2, LIN Xinchen3, FENG Wei2,3, LI Weiguang1,*()   

  1. 1. School of Environment, Harbin Institute of Technology, Harbin 150090, China
    2. Key Labroratory of Songliao Aquatic Environnment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China
    3. College of Environment and Resources, Jilin University, Changchun 130021, China
  • Received:2018-06-22 Online:2018-11-10 Published:2018-09-10
  • Contact: LI Weiguang E-mail:hitliwg@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.61774073).

摘要:

以玉米秸秆为生物模板, 经铁盐和钛盐溶液浸渍后煅烧, 制备了新型Fe3O4/TiO2分层介孔玉米秸秆碳骨架复合材料(Fe3O4/TiO2@MSC), 并研究了其多相UV-Fenton体系降解四环素的效能. 利用X射线衍射(XRD)、 X射线光电子能谱(XPS)、 N2吸附-脱附、 扫描电子显微镜(SEM)和透射电子显微镜(TEM)对合成的催化剂进行了表征. 结果表明, Fe3O4/TiO2@MSC保留了玉米秸秆的分级多孔形态, 纳米Fe3O4和TiO2在MSC表面生长, 秸秆碳作为骨架提高了纳米Fe3O4的分散性, 防止其团聚, 提高了催化剂的稳定性, 并且能够增加材料的比表面积和活性点位, 进而增强对UV-Fenton体系的催化活性. TiO2光催化和多相Fenton体系的协同作用促进了Fe(Ⅲ)向Fe(Ⅱ)转化. 催化性能研究结果表明, 在相同条件下, Fe3O4/TiO2@MSC催化的多相UV-Fenton体系盐酸四环素(TCH)降解效率在反应40 min后达到99.8%, 远高于Fe3O4@MSC+H2O2(30%), UV+H2O2(73%)、 UV+Fe3O4@MSC+H2O2(89.1%)和UV+Fe3O4/TiO2+H2O2(89.2%)体系, 并且该体系在中性甚至碱性条件下均能达到满意的TCH去除效果.

关键词: Fe3O4/TiO2@MSC, 玉米秸秆碳骨架, UV-Fenton体系, 盐酸四环素

Abstract:

A novel maize straw carbon(MSC) skeleton layered mesoporous material, Fe3O4/TiO2@MSC, was synthesized by using maize straw as raw material and calcination with iron salt and titanium salt solution. The degradation of tetracycline hydrochloride(TCH) in UV-Fenton system was studied. The as-synthesized catalysts were characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), N2 adsorption-desorption, scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results showed that the prepared Fe3O4/TiO2@MSC retained the original pore morphology of maize straw. The nano-Fe3O4 and TiO2 grew on the surface of MSC. The straw carbon as a framework improved the dispersion of nano-Fe3O4, prevented its agglomeration, increased the stability of catalyst, and increased the specific surface area and active site of the material, thereby enhancing the UV-Fenton’s reactivity. The synergistic effect of TiO2 photocatalysis and UV-Fenton system can promote the conversion of Fe(Ⅲ) to Fe(Ⅱ). Therefore, under the same conditions, TCH degradation efficiency in Fe3O4/TiO2@MSC catalyzed UV-Fenton system reached 99. 8% after 40 min reaction, much higher than those in Fe3O4@MSC+H2O2(30%), UV+H2O2(73%), UV+Fe3O4@MSC+H2O2(89.1%) and UV+Fe3O4/TiO2+H2O2(89.2%) systems. And the system can achieve satisfactory removal effect under neutral or even alkaline conditions.

Key words: Fe3O4/TiO2@MSC, Maize straw carbon skeleon, UV-Fenton system, Tetracycline hydrochloride

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