化工进展 ›› 2018, Vol. 37 ›› Issue (07): 2860-2866.DOI: 10.16085/j.issn.1000-6613.2017-2002

• 资源与环境化工 • 上一篇    下一篇

MIL-101光催化剂对Cr(Ⅵ)-RhB复合污染的定向分离及其高效光催化协同处理

崔陪陪1, 胡芸1,2,3, 黄倩倩1, 付名利1,2,3   

  1. 1 华南理工大学环境与能源学院, 广东 广州 510006;
    2 广东省大气环境与污染控制重点实验室, 广东 广州 510006;
    3 广东省环境风险防控与应急处置工程技术研究中心, 广东 广州 510006
  • 收稿日期:2017-09-24 修回日期:2017-11-08 出版日期:2018-07-05 发布日期:2018-07-05
  • 通讯作者: 胡芸,教授,博士生导师,研究方向为环境功能材料。
  • 作者简介:崔陪陪(1992-),女,硕士研究生,研究方向为环境功能材料。
  • 基金资助:
    国家自然科学基金(21577039,21777047,51578245)、广东省科技计划(2015A020215004)及广州市科技计划(201804020026)项目。

Directional separation and synergetic treatment of Cr(Ⅵ)-RhB on MIL-101 photocatalyst

CUI Peipei1, HU Yun1,2,3, HUANG Qianqian1, FU Mingli1,2,3   

  1. 1 School of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China;
    2 Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, Guangdong, China;
    3 Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou 510006, Guangdong, China
  • Received:2017-09-24 Revised:2017-11-08 Online:2018-07-05 Published:2018-07-05

摘要: 以九水硝酸铬、对苯二甲酸、氢氟酸为前体,采用水热法制备了MIL-101光催化剂。运用X射线衍射(XRD)、紫外-可见光吸收光谱(UV-vis)、傅里叶红外光谱(FTIR)、BET比表面积分析仪、扫描电镜(SEM)及透射电镜(TEM)等方法表征材料的形貌结构。考察了MIL-101(Cr)光催化剂对Cr(Ⅵ)-RhB水体复合污染的定向分离以及光催化处理性能,并对其协同处理机制进行了探讨。结果表明:相较于单一Cr(Ⅵ)和RhB污染,该光催化剂在紫外光下表现出对Cr(Ⅵ)-RhB水体复合污染更高的处理效率。而且由于MIL-101的本身结构的特性,使得分子直径不同的两种目标污染物Cr(Ⅵ)和RhB能够自主定向分离,并且同步发生氧化还原反应。

关键词: MIL-101, Cr (Ⅵ)-RhB复合污染, 光催化, 定向分离, 协同处理

Abstract: The MIL-101 photocatalysts were prepared by solvothermal synthesis method using chromic nitrate nonahydrate, terephthalic acid and hydrofluoric acid as precursors. The structures of the samples were characterized by X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-vis), fourier transform-infrared (FTIR), Brunauer-Emmett-Teller (BET), scanning electron microscope (SEM) and transmission electron microscope (TEM) measurements. The orientationasl separation and photocatalytic reaction of Cr(Ⅵ) and RhB in Cr(Ⅵ)-RhB combined pollution on MIL-101(Cr) were investigated. Furthermore, the synergetic treatment mechanism for the combined pollution was discussed. The results demonstrated that this photocatalyst exhibited higher treatment efficiency for Cr(Ⅵ)-RhB combined pollution than for single Cr(Ⅵ) or RhB under ultraviolet light irradiation. Meanwhile, because of the structure of MIL-101, the target pollutants of Cr(Ⅵ) and RhB with different molecular diameters can be directionally separated, and the oxidation of RhB was synchronized with the reduction of Cr(Ⅵ).

Key words: MIL-101, Cr (Ⅵ)-RhB, photocatalysts, directional separation, synergetic treatment

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