Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (10): 20220215.doi: 10.7503/cjcu20220215

• Article: Inorganic Chemistry • Previous Articles     Next Articles

Synthesis, Characterization and Catalytic Oxidation Iodine Ion Performance of trz-Cl-Cu-PMo12

ZHANG Taiwen1, GUO Jun1,2(), ZHANG Dan2, YUAN Changmei1, QIU Shuangyan1   

  1. 1.School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550001,China
    2.State Key Laboratory for Efficient Utilization of Medium and Low Grade Phosphate Rock and Its Associated Resources,Wengfu(Group)Co,Guiyang 550014,China
  • Received:2022-04-05 Online:2022-10-10 Published:2022-06-21
  • Contact: GUO Jun E-mail:justin_gixt@163. com
  • Supported by:
    the National Natural Science Foundation of China(21862005);the Project of Guizhou Provincial Science and Technology Department, China(Nos. Qianhe Foundation [2019]1457, Qiankehe Support [2019]2835, Guizhou Kehe Platform Talent [2018] 5769) and the Youth Science and Technology Talent Growth Project of Guizhou Provincial Department of Education, China(No. Qian Kehe KY Zi [2018]126)

Abstract:

Using H3PMo12O40 as precursor, 1,2,4-triazole-modified Keggin-type polyoxometalate-based metal- organic framework compound trz-Cl-Cu-PMo12 was synthesized by in situ decarboxylation of 1,2,4-triazole-3-carbo?xylic acid by hydrothermal method. It was characterized by X-ray single crystal diffraction, IR, TG, XRD, SEM, elemental analysis, etc. X-ray single crystal diffraction and elemental analysis showed that the structural formula of the crystalline compound is [Cu6Cl0.5(C2H2N34][PMo12O40][Cu6Cl0.5(C2H2N34], and consists of one classic Keggin type [PMo12O403-, two [Cu6Cl0.5(C2H2N341.5+ by approximately center symmetry, and one-dimen?sional(1D)to three-dimensional(3D)structures are formed between components through supramolecular interactions. Catalytic stu-dies show that the heterogeneous catalyst is in catalytic oxidation of hydrogen peroxide with iodide ion as iodine element, the reaction rate reaches the end point after 4 min 35 s, the reaction rate is as high as 1.42×10-5 mol·L-1·s-1, and the generation rate of iodine element is increased by about 551 times. The catalyst is reused 8 times, and the conversion rate is still as high as 99. 6%, showing excellent catalytic activity and good repeatability.

Key words: Polyoxometalates, in situ Decarboxylation, Catalytic performance, Iodide ion

CLC Number: 

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