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Bimetallic MOF material and its preparation method and application in hydrogenation reaction
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A bimetallic and metal technology, which is applied in the field of bimetallic MOF materials and its preparation, can solve the problems of low activity, few active sites, and difficult access, and achieve the effects of excellent catalytic activity, improved utilization rate, and low cost
Active Publication Date: 2021-11-02
TIANJIN UNIV
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Traditional solid heterogeneous catalysts have fewer exposed active sites due to the limitation of specific surface area, so they show low activity in the catalytic process, while catalysts supported by porous carriers can effectively improve catalytic activity, but still difficult to achieve the desired result
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[0038] In another aspect of the invention, the present invention provides a method of preparing a bimetallic MOF material, wherein the preparation method comprises:
[0039] The iron and the doped metal are connected to the organic skeleton to obtain the double metal MOF material;
[0040] The doping metal comprises Cr, Mn, Co, Ni, Cu or Zn, the organic skeleton to diphenoic acid. As a result, the operation is simple, convenient, and easy to achieve, which is beneficial to obtain a bimetal MOF material excellent in catalytic performance.
[0041] In some embodiments of the invention, the preparation method includes:
[0042] The iron source and the doped metal source were mixed with dibenzoic acid to obtain a mixed solution;
[0043] After adding NaOH to the mixed solution, the reaction was carried out to give the bimetallic MOF material.
[0044] It should be noted that the doped metal source refers to a metal salt capable of providing Cr, Mn, Co, Ni, Cu or Zn.
[0045] In some e...
Embodiment 1
[0057] The preparation method of bimetallic MOF material includes the following steps:
[0058] Weigh 0.75mmol ferricnitrate, zincnitrate was placed 0.25 mmol PTFE liner, was added 5mL of stir dibenzoate was added dropwise 1mL 0.4M aqueous NaOH and placed in the heated environment of 100 deg.] C to react, after 12 hours the reaction temperature was lowered to room temperature to give the bimetallic MOF material.
[0059] XRD spectrum bimetal MOF material according to the present embodiment as those of the figure 1 Shown, wherein, FeMOF characteristic peaks does not appear other peaks heteroaryl, Zn proved successful FeMOF doped into the lattice. ICP (inductively coupled plasma) results demonstrate that the bimetallic material MOF Fe: Zn is 3.08: 1.08 (molar ratio).
[0067] Preparation of MOF bimetallic material in Example 1, except that iron nitrate was added 0.825mmol, 0.175 mmol zinc nitrate.
[0068] ICP characterization results demonstrate that the bimetallic material MOF Fe: Zn is 7.08: 1.02 (molar ratio).
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Abstract
The invention provides a bimetallic MOF material and its preparation method and application in hydrogenation reaction, relating to the field of hydrogenation technology, the bimetallic MOF material includes: iron, doped metal and organic framework, the iron and the A dopingmetal is connected to the organic framework; wherein, the dopingmetal includes Cr, Mn, Co, Ni, Cu or Zn, and the organic framework is terephthalic acid. The bimetallic MOF material is a substance with a regular crystal structure, the metal centers are connected by organic ligands, the metal active centers can be 100% exposed, and the catalytic activity is excellent.
Description
Technical field [0001] The present invention relates to the field of hydrogenation techniques, and more particularly to a bimetallic MOF material and a preparation method thereof and an application in a hydrogenation reaction. Background technique [0002] Multi-phase catalytic hydrogenation is an important step in industrial production. According to statistics, 25% of chemical production will involve at least one step hydrogenation, so the efficiency of hydrogenation directly determines the economic benefits of the entire production process, how to design Efficient and low-cost hydrogenation catalysts are the focus of this field. The conventional solid multiphase catalyst is less than the surface limit, and the exposed active site is small, and therefore, in the catalytic process, the catalyst having a vectors having porous characteristics can effectively improve the catalytic activity, but It is still difficult to achieve the ideal results. [0003] In view of this, the present...
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