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Supported metal organic skeleton/graphene oxide hydrogen storage material and preparation method thereof

A technology of metal-organic frameworks and hydrogen storage materials, which is applied in chemical instruments and methods, hydrogen production, and other chemical processes. The effect of maturity, low cost and simple process

Inactive Publication Date: 2015-04-22
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although people have made some progress in this field, there are still many problems such as insufficient hydrogen storage capacity at room temperature and poor controllability of experiments.
In addition, the particle size and dispersion of the active component, the nature of the carrier, and the combination of the active component and the carrier will all affect the hydrogen spillover effect, such as Wang, L.F.; Lachawiec Jr, A.J.; Yang, There are studies in R.T.RSC Adv., 2013, 3, 23935. Therefore, the hydrogen overflow mechanism of MOFs still needs to be further explored

Method used

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  • Supported metal organic skeleton/graphene oxide hydrogen storage material and preparation method thereof
  • Supported metal organic skeleton/graphene oxide hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Dissolve 2.933 g of zinc nitrate and 4.867 g of 2-methylimidazole in 230 mL of methanol, then add 0.390 g of graphene oxide, and stir at 10° C. for 6 hours. The centrifuged product was washed three times with methanol (10 mL each time) to prepare the ZIF-8 / graphene oxide carrier material.

[0024] (2) Dissolve 8.38 mg of palladium chloride and 20.6 mg of polyvinyl alcohol in 42 mL of deionized water, and stir for 1 hour. Then add 200 mg of ZIF-8 / graphene oxide, stir for 2 hours, then slowly add 15 mg of sodium borohydride, and stir for 5 hours. The centrifuged product was washed twice with water (10 mL each time), and dried at 60° C. for 24 hours to obtain a supported metal organic framework / graphene oxide hydrogen storage material.

Embodiment 2

[0026] (1) Dissolve 2.933 g of zinc sulfate and 6.489 g of 2-methylimidazole in 280 mL of methanol, then add 0.471 g of graphene oxide, and stir at 30° C. for 4 hours. The centrifuged product was washed three times with methanol (10 mL each time) to prepare the ZIF-8 / graphene oxide carrier material.

[0027] (2) Dissolve 25.14 mg of tetrachloropalladium acid and 61.80 mg of polyvinyl alcohol in 126 mL of deionized water, and stir for 1 hour. Then add 200 mg of ZIF-8 / graphene oxide, stir for 2 hours, then slowly add 45 mg of potassium borohydride, and stir for 5 hours. The centrifuged product was washed twice with water (10 mL each time), and dried at 60° C. for 24 hours to obtain a supported metal organic framework / graphene oxide hydrogen storage material.

Embodiment 3

[0029] (1) Dissolve 2.933g of zinc chloride and 8.111g of 2-methylimidazole in 330mL of methanol, then add 0.552g of graphene oxide, and stir at 50°C for 2 hours. The centrifuged product was washed three times with methanol (10 mL each time) to prepare the ZIF-8 / graphene oxide carrier material.

[0030] (2) Dissolve 41.90 mg of palladium acetylacetonate and 103.00 mg of polyvinyl alcohol in 210 mL of deionized water, and stir for 1 hour. Then add 200 mg of ZIF-8 / graphene oxide, stir for 2 hours, then slowly add 75 mg of hydrazine hydrate, and stir for 5 hours. The centrifuged product was washed twice with water (10 mL each time), and dried at 60° C. for 24 hours to obtain a supported metal organic framework / graphene oxide hydrogen storage material.

[0031] The room temperature hydrogen storage test of the hydrogen storage materials prepared in Examples 1-3 was completed on the ASAP 2020 device of American Mike Company, and the samples were vacuum degassed at 160° C. for 24 h...

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Abstract

The invention discloses a supported metal organic skeleton / graphene oxide hydrogen storage material and a preparation method thereof. The hydrogen storage material is formed by steeping palladium metal in a metal organic skeleton / graphene oxide carrier, wherein the loading capacity of the palladium metal is 1.0-5.0% of the mass of the carrier; and the metal organic skeleton is ZIF-8. The preparation method comprises the following steps: firstly heating reactants of dissolvable zinc salt, 2-methylimidazole and graphene oxide to prepare a metal organic skeleton / graphene oxide carrier material, and then loading dissolvable palladium salt in the metal organic skeleton / graphene oxide carrier to obtain the supported metal organic skeleton / graphene oxide hydrogen storage material under the condition of existence of a reductant and a dispersant by adopting an excessive steeping method. The supported metal organic skeleton / graphene oxide hydrogen storage material has good hydrogen storage performance at room temperature, and the process is simple.

Description

technical field [0001] The invention belongs to the technical field of synthesis of hydrogen storage materials, and in particular relates to a loaded metal organic framework / graphene oxide hydrogen storage material and a preparation method thereof. Background technique [0002] Hydrogen has attracted much attention as a green and renewable energy source. Metal-organic frameworks (MOFs) are considered promising hydrogen storage materials due to their high specific surface area, large porosity, and adjustable structure, such as Suh, M.P.; Park, H.J.; Prasad, T.K.; Lim, D.W. Chem. Rev., 2008, 112, 782. Unfortunately, the physical adsorption mechanism of MOFs can only store a large amount of hydrogen at extremely low temperatures, and its room temperature hydrogen storage capacity is extremely low. Hydrogen overflow technology has become a research hotspot in the field of hydrogen storage because it can significantly increase the hydrogen absorption capacity of MOFs at room tem...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C01B3/02
Inventor 周虎袁爱华张健张军
Owner JIANGSU UNIV OF SCI & TECH
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