高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (10): 20220215.doi: 10.7503/cjcu20220215

• 研究论文: 无机化学 • 上一篇    下一篇

trz-Cl-Cu-PMo12的合成、 表征及催化氧化碘离子性能

张太文1, 郭军1,2(), 张丹2, 袁常梅1, 邱双艳1   

  1. 1.贵州师范大学化学与材料科学学院, 贵阳 550001
    2.瓮福(集团)有限责任公司中低品位磷矿及其共伴生资源高效利用国家重点实验室, 贵阳 550014
  • 收稿日期:2022-04-05 出版日期:2022-10-10 发布日期:2022-06-21
  • 通讯作者: 郭军 E-mail:justin_gixt@163. com
  • 基金资助:
    国家自然科学基金(21862005);贵州省科技厅计划项目(批准号: 黔合基础[2019]1457、 黔科合支撑[2019]2835、 黔科合平台人才[2018]5769)和贵州省教育厅青年科技人才成长项目(批准号: 黔科合KY字[2018]126)资助

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)

摘要:

以H3PMo12O40为前驱体, 采用水热法使1,2,4-三氮唑-3-甲酸进行原位脱羧后, 合成了1,2,4-三氮唑修饰的Keggin型多金属氧酸盐基金属-有机框架化合物(trz-Cl-Cu-PMo12), 并通过X射线单晶衍射、 红外光谱(IR)、 热重分析(TG)、 X射线衍射(XRD)、 扫描电子显微镜(SEM)及元素分析等手段对其进行了表征. X射线单晶衍射及元素分析表明, 该晶体化合物的结构式为[Cu6Cl0.5(C2H2N3)4][PMo12O40][Cu6Cl0.5(C2H2N3)4], 且由1个经典的 Keggin 型[PMo12O40]3-和2个[Cu6Cl0.5(C2H2N3)4]1.5+以近似中心对称的方式构成, 各组分之间通过超分子作用形成一维(1D)~三维(3D)结构. 催化性能研究结果表明, 该非均相催化剂在催化过氧化氢氧化碘离子为碘单质的反应中, 经4 min 35 s到达终点时, 反应速率高达1.42×10-5 mol·L-1· s-1, 碘单质生成速率提高了约551倍. 催化剂重复使用8次, 转化率仍然高达99.6%, 表现出优异的催化活性, 且具有良好的可重复性.

关键词: 多金属氧酸盐, 原位脱羧, 催化性能, 碘离子

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

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