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LiNH2BH3 synthesis method by taking lithium amide and ammonia borane as raw material

A lithium amide and raw material technology, applied in the direction of borane/diborane hydride, etc., can solve the problems of uneven contact of materials, low product purity, difficult control of reaction temperature, etc., and achieve fast reaction and easy realization Effect

Inactive Publication Date: 2009-09-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the ball milling process of this method, the material contact is not uniform, and the reaction temperature is not easy to control, and the product purity is not high.

Method used

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  • LiNH2BH3 synthesis method by taking lithium amide and ammonia borane as raw material
  • LiNH2BH3 synthesis method by taking lithium amide and ammonia borane as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Preparation of LiNH by liquid reaction method 2 BH 3

[0021] At room temperature 25°C, in an inert atmosphere, 0.308 g of BH 3 NH 3 Dissolve in 5 mL THF, add to 0.2295 g LiNH 2 , stirred vigorously at room temperature for 3 hours, and vacuum-dried the resulting mixed solution at 40° C. for 12 hours to obtain the final product. figure 1 is the XRD spectrum of the resulting product.

Embodiment 2

[0022] Embodiment 2: Preparation of LiNH by solid state reaction method 2 BH 3

[0023] At room temperature 25°C, 0.308 g of BH 3 NH 3 with 0.2295 g of LiNH 2 Mix and stir under an inert atmosphere, react for 1 minute, and vacuumize the product for 3 hours to remove impurity gas to obtain the product. figure 2 is the XRD spectrum of the resulting product.

Embodiment 3

[0024] Embodiment 3: Preparation of LiNH by liquid reaction method 2 BH 3

[0025] In an inert atmosphere at 10 °C, 0.308 g of BH 3 NH 3 Dissolve in 10 mL THF, add to 0.2295 g LiNH 2 , stirred vigorously at room temperature for 5 hours, and vacuum-dried the resulting mixed solution at 10° C. for 24 hours to obtain the final product.

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Abstract

The invention belongs to the technical field of material preparation, particularly relates to a LiNH2BH3 synthesis method by taking lithium amide and ammonia borane as raw materials. The product can be obtained by liquid reaction and solid reaction, wherein the liquid reaction method includes the following steps: BH3NH3 is dissolved in solvent under anhydrous oxygen-free inert atmosphere, the mixture is added into LiNH2 to react at 10-50 DEG C for 0.1-24 hours, thus obtaining LiNH2BH3 solid, and then the solvent is deprived under vacuum to obtain pure LiNH2BH3; wherein the molar ratio of lithium amide and ammonia borane is 1:1. The solid reaction method includes the following steps: BH3NH3 solid reacts with LiNH2 directly under inert atmosphere at 0-80 DEG C for 0.5-120 minutes, and then impurities and gas are deprived under vacuum to obtain pure LiNH2BH3; wherein the molar ratio of lithium amide and ammonia borane is 1:1. The invention is high in reaction speed, is easy to be realized, and can prepare the product with high purity.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and specifically relates to a method for synthesizing pure LiNH with lithium amide and boron ammonia as raw materials. 2 BH 3 Methods. Background technique [0002] Energy is an important material basis for human activities. At present, its main body is fossil fuels, which are non-renewable resources. However, there are many deficiencies in using fossil fuels as energy sources. With the development of the national economy and the deepening of urbanization, this problem has a great impact on the economy Constraints to development and improvement of people's quality of life are becoming increasingly apparent. Due to its high efficiency and non-polluting characteristics, hydrogen energy is one of the most ideal energy sources in the future. The development of hydrogen energy is currently the focus of global research. Hydrogen storage materials are an important part of the development ...

Claims

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Application Information

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IPC IPC(8): C01B6/21
Inventor 余学斌夏广林郭艳辉高梁
Owner FUDAN UNIV
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