Nano Research

, Volume 10, Issue 10, pp 3543–3556 | Cite as

Formation of willow leaf-like structures composed of NH2-MIL68(In) on a multifunctional multiwalled carbon nanotube backbone for enhanced photocatalytic reduction of Cr(VI)

  • Yunhong Pi
  • Xiyi Li
  • Qibin Xia
  • Junliang Wu
  • Zhong Li
  • Yingwei Li
  • Jing Xiao
Research Article
  • 70 Downloads

Abstract

Efficient separation and transfer of photogenerated electron/hole as well as enhanced visible light absorption play essential roles in photocatalytic reactions. To promote the photocatalytic reduction of Cr(VI), a toxic heavy metal ion, multiwalled carbon nanotube (MWCNT) was introduced as an electron acceptor into NH2-MIL-68(In). This led to the growth of a willow leaf-like metal-organic framework (MOF) on an MWCNT backbone forming MWCNT/NH2-MIL-68(In) (PL-1), which showed a highly efficient transfer of photogenerated carriers. Moreover, MWCNT incorporation introduced more mesopores for Cr(VI) diffusion and enhanced the visible light adsorption without lowering the conduction band position. As a result, the photocatalytic kinetic constant of PL-1 was found to be almost three times higher than that of the parent NH2-MIL-68(In). Thus, growing MOFs on MWCNTs provides a facile and promising solution for effective remediation of environmental pollution by utilizing solar energy. This work provides the first example of using MWCNT/MOF composites for photocatalytic reactions.

Keywords

NH2-MIL-68(In) multiwalled carbon nanotube (MWCNT) photocatalytic reduction Cr(VI) 

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Formation of willow leaf-like structures composed of NH2-MIL68(In) on a multifunctional multiwalled carbon nanotube backbone for enhanced photocatalytic reduction of Cr(VI)

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Yunhong Pi
    • 1
    • 2
  • Xiyi Li
    • 1
    • 2
  • Qibin Xia
    • 1
    • 2
  • Junliang Wu
    • 1
    • 2
  • Zhong Li
    • 1
    • 2
  • Yingwei Li
    • 1
    • 2
  • Jing Xiao
    • 1
    • 2
  1. 1.School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouChina
  2. 2.Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution ControlSouth China University of TechnologyGuangzhouChina

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