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Method for preparing mixed metal carbon-based composite material by using polyacid-based metal organic framework material

A carbon-based composite material and organic framework technology, applied in the field of material chemistry, can solve problems such as high cost, long cycle time, and secondary pollution

Pending Publication Date: 2021-09-14
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing organic pollutant removal methods have defects such as high cost, long cycle, and secondary pollution, which have become a key technical bottleneck restricting the treatment of organic pollutants

Method used

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  • Method for preparing mixed metal carbon-based composite material by using polyacid-based metal organic framework material
  • Method for preparing mixed metal carbon-based composite material by using polyacid-based metal organic framework material
  • Method for preparing mixed metal carbon-based composite material by using polyacid-based metal organic framework material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Stir the mixture of metal salt zinc nitrate and organic ligand 2-methylimidazole for 14 hours;

[0024] Step 2: The saturated polyacid H 3 PMo 12 o 40 Add to the mixed solution prepared in step 1, the saturated polyacid H in the mixed solution 3 PMo 12 o 40 The concentration is 0.01-15mol / L;

[0025] Step 3: stirring and reacting the solution obtained in step 2 at 180° C. for 1 h to obtain a reactant;

[0026] Step 4: The reactant obtained in Step 3 was washed several times with ethanol and deionized water, and then dried in a vacuum oven at 80° C. to obtain a polyacid-based metal-organic framework material;

[0027] The prepared polyacid-based metal-organic framework materials were subjected to in-situ template pyrolytic carbonization, sulfuration, and phosphating post-treatment to obtain MoS 2 @ZnS Carbon based composites.

Embodiment 2

[0029] Step 1: Stir the mixture of metal salt zinc nitrate and organic ligand 2-methylimidazole for 0.5 hours,

[0030] Step 2: The saturated polyacid H 3 PMo 12 o 40 Add to the mixed solution prepared in step 1, the saturated polyacid H in the mixed solution 3 PMo 12 o 40 The concentration is 0.01-15mol / L;

[0031] Step 3: stirring and reacting the solution obtained in step 2 at 20° C. for 24 hours to obtain a reactant;

[0032] Step 4: The reactant obtained in Step 3 was washed several times with ethanol and deionized water, and then dried in a vacuum oven at 40° C. to obtain a polyacid-based metal-organic framework material;

[0033] In situ template pyrolytic carbonization, sulfurization and phosphating of the prepared polyacid-based metal-organic frameworks to obtain mixed-metal MoS 2 @ZnS Carbon based composites.

Embodiment 3

[0035] Step 1: Metal ion Cu 2+ , Fe 3+ , Zn 2+ ,Co 2+ , Zr 4+ A mixture of any one of the organic ligands trimesic acid, 2-methylimidazole, terephthalic acid and biphenyl dicarboxylic acid was stirred for 24 hours;

[0036] Step 2: The saturated polyacid H 3 PMo 12 o 40 Add to the mixed solution prepared in step 1, the saturated polyacid H in the mixed solution 3 PMo 12 o 40 The concentration is 0.01-15mol / L;

[0037] Step 3: stirring and reacting the solution obtained in step 2 at 100° C. for 1 h to obtain a reactant;

[0038] Step 4: The reactant obtained in Step 3 was washed several times with ethanol and deionized water, and then dried in a vacuum oven at 60° C. to obtain a polyacid-based metal-organic framework material;

[0039] The prepared polyacid-based metal-organic framework was subjected to in-situ template pyrolytic carbonization, sulfurization and phosphating to obtain carbon-based composites.

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Abstract

The invention relates to a method for preparing a mixed metal carbon-based composite material by using a polyacid-based metal organic framework material. The method comprises the following steps: carrying out in-situ template pyrolysis carbonization, vulcanization, phosphorization and other post-treatments on a prepared polyacid-based metal organic framework material to obtain a mixed metal carbon-based composite material. According to the invention, a series of porous carbon uniformly-loaded mixed metal composite materials with uniform pore diameters and adjustable sizes are prepared by selecting multi-acid@MOF materials with different pore structures as precursors and adopting a temperature programming-in-situ template pyrolysis and post-treatment method to develop surface modification and regulate and control the pore diameters at the same time, so that the cost is effectively saved, the period is shortened, and the defect of secondary pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of material chemistry, in particular to a method for preparing mixed metal-carbon-based composite materials with polyacid-based metal-organic framework materials. Background technique [0002] Polyoxometalates (abbreviated as polyacids) refer to a class of polymetallic oxygen clusters with special structures and properties formed by polycondensation of some pre-transition elements Mo, W, V, etc. with MOx (X=5 or 6) as units. The composition is adjustable, the structure is diverse, and the properties can be improved. In recent years, researchers have used different types of polyacids as precursors to obtain transition metal-based non-noble metal catalysts after post-treatment, which have shown remarkable catalytic performance in photocatalysis and greatly enriched the application fields of polyacids. Metal-organic framework (MOF) is a classical porous material composed of metal ion / cluster units coordinated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J37/20B01J37/08
CPCB01J27/051B01J37/20B01J37/082
Inventor 兰青靳素娟张丹李旭阳杨妍杨博涵司超磊
Owner NANYANG NORMAL UNIV