K2TiF6 doped Mg/PMMA composite material and preparation method thereof

A composite material and charging amount technology, applied in hydrogen production and other directions, can solve the problems of poor low-temperature hydrogen absorption and desorption performance, restricting popularization and application, etc., and achieve the effects of easy operation, low price, and simple preparation process.

Active Publication Date: 2015-06-10
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But pure MgH 2 The low-temperature hydrogen absorption and desorption performance is poor, which seriously restricts its popularization and application.

Method used

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  • K2TiF6 doped Mg/PMMA composite material and preparation method thereof
  • K2TiF6 doped Mg/PMMA composite material and preparation method thereof
  • K2TiF6 doped Mg/PMMA composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Example: with K 2 TiF 6 as a catalyst for MgH 2 / PMMA for doping.

[0022] Weigh 0.2g K in the glove box 2 TiF 6 and 1.0 g MgH 2 , put it into a ball mill jar with a capacity of 100mL, put 20 steel balls with a diameter of 10 mm into the ball mill jar, and ensure that the ball-to-material ratio is 100:1. Put the ball mill jar in the ball mill, set the rotation speed to 400 r / min, and the time is 4 hours, and the final sample obtained is MgH 2 -K 2 TiF 6 Material.

[0023] Weigh 1.0 g of the above sample in the glove box, put it in a 50 mL Erlenmeyer flask, add 20 mL of anhydrous THF, and then add 0.3 g of PMMA material. The Erlenmeyer flask was sealed, then ultrasonicated for 0.5 hours, then vacuum-dried at 50°C for 12 hours, and finally vacuum-dried at room temperature for 5 hours to obtain K 2 TiF 6 Doped MgH 2 / PMMA sample

[0024] MgH doped with catalyst 2 XRD characterization of / PMMA composites

[0025] For the prepared MgH doped...

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Abstract

The invention provides a K2TiF6 doped Mg / PMMA composite material and a preparation method thereof. The invention relates to a preparation method for doping a MgH2 / polymethyl methacrylate (PMMA) composite hydrogen storage material by using K2TiF6 as a catalyst, in particular relates to a method for improving the dehydrogenation property of the MgH2 / PMMA composite hydrogen storage material by virtue of doping with the K2TiF6 as the catalyst, and belongs to the field of material invention. The composite material is prepared by virtue of the following steps: firstly, preparing a K2TiF6-MgH2 material by use of a solid-phase ball milling method; secondly, performing ultrasonic treatment, by use of a liquid-phase ultrasonic method, on the K2TiF6-MgH2 material in a tetrahydrofuran (THF) solution in which the PMMA is dissolved; finally, preparing the K2TiF6@MgH2 / PMMA composite hydrogen storage material by use of a temperature-controlled vacuum drying method. The composite hydrogen storage material prepared by virtue of solid-phase ball milling and liquid-phase ultrasonic treatment has excellent dehydrogenation property. When the doping amount of the catalyst K2TiF6 is 10-30wt%, the starting dehydrogenation temperature of the material is 120 DEG C, and at 200 DEG C, the constant-temperature dehydrogenation amount in 200 minutes reaches 4.9wt% (the complexing agent PMMA mass ratio deducted), which is 96% of the theoretical hydrogen content of the material.

Description

technical field [0001] The present invention relates to a kind of catalyst, specifically a kind of K 2 TiF 6 Doped Mg / PMMA composite material and preparation method. Background technique [0002] With the continuous consumption of mineral energy and a series of environmental problems caused by it, seeking clean, environmentally friendly and renewable new energy has become a scientific issue of common concern to scientists. Hydrogen energy, as a form of renewable energy storage with abundant reserves, clean and environment-friendly, has attracted widespread attention from all over the world. The commercial application of hydrogen energy needs to solve the three major technical problems of its production, storage and transportation, among which the efficient and safe on-board storage of hydrogen is the most challenging research topic with commercial application value. Among the studied hydrogen storage methods, solid-state hydrogen storage, which has obvious advantages in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04
CPCY02E60/36
Inventor 孙立贤李志宝徐芬闫二虎亓卫东蔡荣
Owner GUILIN UNIV OF ELECTRONIC TECH
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