Rapid Construction of ZnO@ZIF‑8 Heterostructures with Size-Selective Photocatalysis Properties

  • Xianbiao Wang (2574457)
  • Jin Liu (1235427)
  • Sookwan Leong (2574460)
  • Xiaocheng Lin (1721479)
  • Jing Wei (127335)
  • Biao Kong (1629157)
  • Yongfei Xu (1876972)
  • Ze-Xian Low (1711435)
  • Jianfeng Yao (657360)
  • Huanting Wang (1430728)
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Publication date
March 2016

Abstract

To selectively remove heavy metal from dye solution, inspired by the unique pore structure of ZIF-8, we developed a synthetic strategy for rapid construction of ZnO@ZIF-8 heterostructure photocatalyst for selective reduction of Cr­(VI) between Cr­(VI) and methylene blue (MB). In particular, ZnO@ZIF-8 core–shell heterostructures were prepared by in situ ZIF-8 crystal growth using ZnO colloidal spheres as template and zinc source within 8–60 min. The shell of the resulting ZnO@ZIF-8 core–shell heterostructure with a uniform thickness of around 30 nm is composed of ZIF-8 crystal polyhedrons. The concentration of organic ligand 2-methylimidazole (Hmim) was found to be crucial for the formation of ZnO@ZIF-8 core–shell heterostructures. Different...

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