Modified lanthanide-series-metal organic framework material and preparation method thereof

A lanthanide metal and organic framework technology, applied in non-metallic elements, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of small hydrogen storage at room temperature, and achieve the effect of increasing the hydrogen storage at room temperature and changing the adsorption process.

Inactive Publication Date: 2016-10-26
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology

The room temperature hydrogen storage capacity of lanthanide metal-organic framework materials in the prior art is small

Method used

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  • Modified lanthanide-series-metal organic framework material and preparation method thereof

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[0031] The preparation method of the present invention may also include activation treatment. Activation treatment may follow drying. The purpose of the activation treatment is to discharge the solvent molecules (such as water, the solvent used for grinding, etc.) in the micropores of the prepared material on the one hand, so that the active ingredient palladium component is more conducive to exerting its effect. On the other hand, activation can also increase the apparent density of the material, for example, it can be increased from 0.1-0.2g / cm3 to 0.2-0.5g / cm3 3 ; Of course, the BET specific surface area can also be increased to a certain extent. The activation method adopts the known gas flow method, that is, the gas flow is used as the adsorbate, where the gas flow can be one or at least two of nitrogen flow, helium flow, and argon flow.

[0032] The activation temperature is preferably 190-210°C, such as 190°C, 195°C, 200°C, 205°C, 210°C, preferably 200°C. Excessively...

Embodiment 1

[0034] Preparation of lanthanide metal organic framework material TbBTC: 0.28mmol Tb(NO 3 ) 3 ·6H 2 O and 0.02g (0.1mmol) H 3 BTC was mixed, and 4ml DMF, 4ml ethanol and 3.2ml HO were added 2 O, stirred at room temperature for 1 h until clear and transparent, then heated to 80 °C in air at a rate of 1 °C / min, and kept for 24 h, then cooled down to room temperature naturally. The yield of the obtained sample was about 37.9%. Elemental analysis: C is 21.98%; H is 1.17%; N is 1.29%.

[0035] The above-mentioned TbBTC lanthanide metal organic framework material and a palladium content of 2wt% are the Pd / AC catalyst powder ratio, and the catalyst Pd accounts for 0.334% of the total mass of the two, calculated as palladium. After mixing the two evenly, add ethanol, disperse by ultrasonic vibration for 20 minutes, let it dry naturally after being uniform, put it in a vacuum drying oven, and dry at 100°C for 3 hours to obtain the modified lanthanide metal organic framework materi...

Embodiment 2

[0037] Preparation of lanthanide metal organic framework material ErBTC: 0.28mmol Er(NO 3 ) 3 ·6H 2 O and 0.02g (0.1mmol) H 3 BTC was mixed, and 4ml DMF, 4ml ethanol and 3.2ml HO were added 2 O, stirred at room temperature for 1 h until clear and transparent, then heated to 80 °C in air at a rate of 1 °C / min, and kept for 24 h, then cooled down to room temperature naturally. The yield of the obtained sample was about 42.9%. Elemental analysis: C is 30.16%; H is 2.50%; N is 3.82%.

[0038] The ErBTC lanthanide metal-organic framework material and the palladium content of 2wt% are used as the Pd / AC catalyst powder ratio, and the catalyst Pd accounts for 0.334% of the total mass of the two, calculated as palladium. After mixing the two evenly, add ethanol, disperse by ultrasonic vibration for 20 minutes, let it dry naturally after being uniform, put it in a vacuum drying oven, and dry at 100°C for 3 hours to obtain the modified lanthanide metal organic framework material. The...

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Abstract

The invention provides a modified lanthanide-series-metal organic framework material and a preparation method thereof. The modified lanthanide-series-metal organic framework material comprises a lanthanide-series-metal organic framework material and a palladium catalyst, wherein the palladium catalyst accounts for 0.1-1% of the total mass of the raw materials when being counted by palladium. The modified lanthanide-series-metal organic framework material has the advantages that the palladium is introduced into the metal organic framework of the modified lanthanide-series-metal organic framework material, the absorption process of hydrogen in the framework is changed, and room-temperature hydrogen storage quantity is increased.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a modified lanthanide metal-organic framework material and a preparation method thereof. Background technique [0002] The development and utilization of hydrogen energy is a possible and important means to solve the global energy crisis and air pollution problems. In the application of hydrogen energy, how to store and transport hydrogen safely and efficiently so that the overall cost can reach an acceptable level is currently a bottleneck problem. Hydrogen storage materials have been a hot topic for researchers from many countries in recent years. However, among the hydrogen storage materials currently studied, there is no material that can better meet the practical goals proposed by the US Department of Energy (DOE). For the hydrogen storage system, in terms of hydrogen storage capacity alone, the development target proposed by DOE is to reach 4.5wt% in 2007, 6wt...

Claims

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Application Information

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IPC IPC(8): B01J20/22C01B3/00
CPCB01J20/02B01J20/226C01B3/0015C01B3/0026C01B3/0078Y02E60/32
Inventor 曹伟桑革郑振华朱新亮张志朱宏志石岩
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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