Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (6): 1723.doi: 10.7503/cjcu20200845

• Inorganic Chemistry • Previous Articles     Next Articles

Synthesis and Photocatalytic Degradation Activity of Two Inorganic-organic Hybrids Based on Keggin-type Heteropolyacids

ZHAO Xue1, ZHANG Ange2, TIAN Hongrui1, WANG Henan1, HUO Haiyan1, LIU Shuxia1()   

  1. 1.College of Chemistry,Northeast Normal University,Changchun 130024,China
    2.College of Environmental Science and Engineering,Jilin Normal University,Siping 136609,China
  • Received:2020-12-07 Online:2021-06-10 Published:2021-06-08
  • Contact: LIU Shuxia E-mail:liusx@nenu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21872021)

Abstract:

Two inorganic-organic hybrids based on Keggin-type heteropolyacids with the chemical formula {[Cu2(4,4′-bipy)4(H2O)4](SiMo12O40)·18H2O}n1) and {[Cu2(4,4′-bipy)4(H2O)4](PMo6W6O40)·18H2O }n2)(bipy=bipyridine) were prepared. The single crystal X-ray analysis shows that the two compounds are isostructural, in which the Cu2+ is six-coordinated, ligated by four N atoms from four 4,4′-bipy and two O atoms from the two water molecules, forming a 2D cation layer [Cu(4,4′-bipy)2(H2O)2n2n+. Keggin-type heteropolyanions are arranged between the 2D cation layers by electrostatic interaction with coordination cations [Cu(4,4′-bipy)2(H2O)2n2n+. These compounds are characterized by infrared spectroscopy, powder X-ray diffraction and solid ultraviolet-visible diffuse reflectance spectroscopy. The degradation activity of synthetic compounds on the water-soluble dye methylene blue was researched. The experimental results indicate that the two compounds exhibit significant photodegradation activity for methylene blue, and the catalytic mechanism is discussed.

Key words: Polyoxometalate, Keggin-type heteropolyacid, Inorganic-organic hybrid, Photocatalysis

CLC Number: 

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