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N regulated Pt/UiO-67 composite material with high stability as well as preparation method and application thereof

A composite material and high stability technology, applied in the direction of organic compound/hydride/coordination complex catalyst, separation method, chemical instrument and method, etc., can solve the problem of high price, easy agglomeration of noble metal nanoparticles, inhibition of development, etc. problem, to achieve uniform distribution, good CO catalytic oxidation effect, good thermal stability and chemical stability

Active Publication Date: 2016-03-16
嘉善县国创新能源研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Noble metals Pt, Pt, and Au are high-conversion and high-stability catalysts for petrochemical industry, automobile exhaust purification, and organic synthesis reactions. further development

Method used

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  • N regulated Pt/UiO-67 composite material with high stability as well as preparation method and application thereof
  • N regulated Pt/UiO-67 composite material with high stability as well as preparation method and application thereof
  • N regulated Pt/UiO-67 composite material with high stability as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0035] Embodiment 11.0% N regulates the preparation of Pt / UiO-67 composite material

[0036] Mix 23.3mg of zirconium chloride and 24.3mg of 6-(4-hydroxyphenyl)nicotinic acid into a 25ml polytetrafluoroethylene liner, add 3ml of DMF, heat at 120°C for 24 hours, filter, wash, and dry to obtain a new MOFsN-UiO-67.

[0037] Weigh 0.1g of N-UiO-67 and ultrasonically dissolve it in 8ml of DMF solution, meanwhile, weigh 0.0022g of K 2 PtCl 4 The DMF solution was added dropwise to the above solution, at room temperature, ultrasonicated for 1 hour, then transferred to a 25ml round bottom flask and stirred for 8 hours, so that the Pt ions were fully adsorbed and evenly dispersed on the surface of the carrier. Freshly prepared NaBH 4 The solution was slowly added dropwise to the above mixed solution, and the Pt 2+ Restored to Pt atoms, in this process, the color of the solution can be seen to change from yellow to black, aging for half an hour, so that Pt 2+ After complete reduction...

Embodiment 23

[0041] Example 23.0% N regulates the preparation of Pt / UiO-67 composite material

[0042] Mix 23.3mg of zirconium chloride and 24.3mg of 6-(4-hydroxyphenyl)nicotinic acid into a 25ml polytetrafluoroethylene liner, add 3ml of DMF, heat at 120°C for 24 hours, filter, wash, and dry to obtain a new MOFsN-UiO-67.

[0043] Weigh 0.1g of N-UiO-67 and ultrasonically dissolve it in 8ml of DMF solution, meanwhile, weigh 0.0067g of K 2 PtCl 4 The DMF solution was added dropwise to the above solution, at room temperature, ultrasonicated for 1 hour, then transferred to a 25ml round bottom flask and stirred for 8 hours, so that the Pt ions were fully adsorbed and evenly dispersed on the surface of the carrier. Freshly prepared NaBH 4 The solution is slowly added dropwise to the above mixed solution to reduce Pt2+ to Pt atoms. In this process, the color of the solution can be seen to change from yellow to black. After aging for half an hour, the Pt 2+ After complete reduction, filter in ...

Embodiment 35

[0045] Example 35.0% N regulates the preparation of Pt / UiO-67 composite

[0046] Mix 23.3mg of zirconium chloride and 24.3mg of 6-(4-hydroxyphenyl)nicotinic acid into a 25ml polytetrafluoroethylene liner, add 3ml of DMF, heat at 120°C for 24 hours, filter, wash, and dry to obtain a new MOFsN-UiO-67.

[0047] Weigh 0.1g of N-UiO-67 and ultrasonically dissolve it in 8ml of DMF solution, meanwhile, measure 0.01144g of K 2 PtCl 4 The DMF solution was added dropwise to the above solution, at room temperature, ultrasonicated for 1 hour, then transferred to a 25ml round bottom flask and stirred for 8 hours, so that the Pt ions were fully adsorbed and evenly dispersed on the surface of the carrier. Freshly prepared NaBH 4 The solution is slowly added dropwise to the above mixed solution to reduce Pt2+ to Pt atoms. In this process, the color of the solution can be seen to change from yellow to black. After aging for half an hour, the Pt 2+ After complete reduction, filter in a sand...

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Abstract

The invention relates to an N regulated Pt / UiO-67 composite material with high stability as well as a preparation method and application thereof. A carrier of the composite material is N-UiO-67, the composite material has a Zr6O32 secondary structure unit and a molecular formula of [Zr6O4(OH)4(O2C-C12NH6-CO2)6], and the loaded precious metal is Pt. The preparation method comprises the following steps: mixing zirconium chloride and 6-(4-hydroxyphenyl) niacin with DMF, carrying out water heating, filtering, washing and drying, thus obtaining new MOFs N-UiO-67; weighing N-UiO-67 and K2PtCI4, respectively dissolving in the DMF solution in an ultrasonic way, meanwhile, dripping the DMF solution of K2PtCI4 to the N-UiO-67 solution, mixing and carrying out ultrasonic treatment, then transferring to a round-bottom flask and stirring, dripping NaBH4 solution for reduction, stirring, filtering, washing, and drying, thus obtaining the powdery N regulated Pt / UiO-67 composite material. The N regulated Pt / UiO-67 composite particles are uniform in distribution, have particle size of about 2-3 micrometers, have relatively low initiation temperature, have carbon monoxide oxidation susceptibility with high stability, and can be recycled.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to an N-regulated Pt / UiO-67 composite material with high stability, a preparation method and application thereof. Background technique [0002] MOFs material is the abbreviation of Metal-Organic Frameworks. MOFs materials have both the rigidity of inorganic materials and the flexibility of organic materials. MOFs porous materials have important application values ​​in gas storage, catalysts, separation and optoelectronic materials, making them present great development potential in modern materials research. and attractive development prospects. [0003] Zr MOF has a high specific surface area, chemical stability and thermal stability, and is a porous material with both micropore and mesopore structures, which can be used as a stable catalyst carrier with high catalytic activity. [0004] Noble metals Pt, Pt, and Au are high-conversion and high-stability c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/28B01D53/86B01D53/62
CPCB01D53/62B01D53/8643B01J31/1691B01J31/28B01J2231/70B01J2531/48Y02A50/20
Inventor 王建国柏家奇庄桂林
Owner 嘉善县国创新能源研究院
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