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Supported oxidized graphene/metal organic framework composite material and preparation method thereof

A metal-organic framework and composite material technology, which is applied in the synthesis and application of supported graphene oxide/metal-organic framework composite materials, can solve the problems of unsatisfactory experimental controllability, reduction and disappearance of hydrogen overflow effect, etc. Achieve the effect of improving hydrogen absorption/desorption level, improving controllability and low cost

Inactive Publication Date: 2014-05-14
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the field of hydrogen overflow of MOFs. For example, the room temperature hydrogen storage capacity of MOFs using hydrogen overflow to store hydrogen is currently only 4.7wt%, which is in line with the commercialization of hydrogen storage materials formulated by the US Department of Energy. There is still a large gap in the index; several existing literatures use the grinding method to mechanically mix MOF and Pt / AC, the controllability of the experiment is not ideal, and the subtle differences in the sample preparation process will lead to the reduction of the hydrogen overflow effect or even disappear, such as Luzan, S.M.; Talyzin, A.V. Micropor. Mesopor. Mat., 2010, 135, 201; Campesi, R.; Cuevas, F.; Latroche, M.; Hirscher. M. Phys. Chem. Chem. Phys., 2010 ,12,10457;Stucket,N.R.;Wang,L.F.;Yang,R.T.Langmuir,2010,26,11963.

Method used

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  • Supported oxidized graphene/metal organic framework composite material and preparation method thereof
  • Supported oxidized graphene/metal organic framework composite material and preparation method thereof
  • Supported oxidized graphene/metal organic framework composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 2g of copper nitrate and 1g of trimesic acid in 17mL of N,N'-dimethylformamide, add 17mL of ethanol and 17mL of deionized water under stirring, and then add 0.15 x Graphene oxide loaded with Pt (the mass fraction of Pt is 20%, the particle size of Pt particles is 3-4nm), stirred evenly and ultrasonically dispersed for 15min, the obtained reaction solution was raised from room temperature to 100°C, keep the temperature for 4 hours, then cool to room temperature naturally. The product after suction filtration was immersed in dichloromethane for 2 times / 3 days, centrifuged at 3000r / h for 15min, and dried at 170°C for 36h to obtain a supported graphene oxide / metal organic framework composite material.

Embodiment 2

[0032] Will 1 g copper sulfate and 1 g Dissolve trimesic acid in 17 mL of N,N′-dimethylformamide, add 8.5 mL of ethanol and 8.5 mL of deionized water while stirring, and then add 0.20 g Graphene oxide loaded with Pt (the mass fraction of Pt is 20%, the particle size of Pt particles is 3-4nm), stirred evenly and ultrasonically dispersed for 30min, the obtained reaction solution was raised from room temperature to 95°C, after constant temperature for 6h, cool to room temperature naturally. The product after suction filtration was immersed in dichloromethane for 3 times / 3 days, centrifuged at 5000r / h for 10min, and dried at 180°C for 24h to obtain a supported graphene oxide / metal organic framework composite material.

Embodiment 3

[0034]Dissolve 1.5g of copper nitrate and 1g of trimesic acid in 17mL of N,N′-dimethylformamide, add 13mL of ethanol and 13mL of deionized water under stirring, and then add 0.2g of Pt-loaded graphene oxide (Pt The mass fraction of the Pt particles is 20%, the particle size of the Pt particles is 3-4nm), stirred evenly and ultrasonically dispersed for 15min, the obtained reaction solution was raised from room temperature to 100°C at a rate of 8°C / h, and after constant temperature for 5h, naturally Cool to room temperature. The product after suction filtration was immersed in dichloromethane for 2 times / 3 days, centrifuged at 4000r / h for 12min, and dried at 160°C for 30h to obtain a supported graphene oxide / metal organic framework composite material.

[0035] Characterization of Example 1

[0036] (1) Powder X-ray Diffraction Characterization of Example 1

[0037] The powder X-ray diffraction data collection of Example 1 of the present invention was completed on XRD-6000 X-ra...

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Abstract

The invention discloses a supported oxidized graphene / metal organic framework composite material and a preparation method thereof. The composite material comprises Pt-supported oxidized graphene and a copper-based metal organic framework, wherein the copper-based metal organic framework consists of copper ions and a bidentate ligand under a coordination bonding effect; the bidentate ligand is trimesic acid. The preparation method comprises the following steps: dissolving soluble copper salt and the trimesic acid in N,N'-dimethyl formamide, and adding ethanol and deionized water with stirring to obtain a mixed solution; adding the Pt-supported oxidized graphene into the formed mixed solution, uniformly stirring, and performing ultrasonic dispersion, so as to obtain a reaction solution; performing solvothermal reaction on the reaction solution under programmed temperature control, soaking, centrifuging and drying a product obtained from suction filtration, so as to obtain the supported oxidized graphene / metal organic framework composite material. The supported oxidized graphene / metal organic framework composite material has the high room temperature hydrogen storage capacity and the high experimental controllability and is simple in process and low in cost.

Description

technical field [0001] The invention belongs to the technical field of synthesis of hydrogen storage materials, in particular to the synthesis and application of a supported graphene oxide / metal organic framework composite material. Background technique [0002] Metal-Organic Frameworks (MOFs for short) are considered to be the most researched and developed materials due to their advantages such as low density, high thermal stability, large specific surface area, adjustable pores, and fast reversible hydrogen absorption / desorption kinetics. New hydrogen storage materials with development prospects, such as Furukawa, H.; Cordova, K.E.; O′Keeffe, M.; Yaghi, O.M. Science, 2013, 341, 1230444. have been studied. In recent years, people have assembled a large number of porous MOFs with novel structures by designing or selecting polycarboxylic acid or nitrogen-containing heterocyclic ligands and metal ions, such as Sculley, J.; Yuan, D.Q.; Zhou, H.C.Energy Environ.Sci., 2011,4,272...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C01B3/02
Inventor 周虎刘晓庆袁爱华
Owner JIANGSU UNIV OF SCI & TECH
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