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A kind of flaky biological carbon/hydrotalcite composite nanomaterial and its preparation method and application

A composite nanomaterial and hydrotalcite technology, which is applied in the field of flaky lignin-based biocarbon/hydrotalcite composite nanomaterials and their preparation, can solve the problems of high price, dependence of organic anions on petrochemical resources, etc. Large, easy-to-industrial effect

Active Publication Date: 2018-03-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic anions used in this method rely on petrochemical resources and are more expensive than biomass materials such as lignin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of hydrotalcite: 0.1mol CoCl 2 ·6H 2 O, 0.05mol AlCl 3 ·6H 2 O. Dissolve 0.2 mol of urea in 1L of deionized water from which carbon dioxide has been removed, place at 98°C and stir for 48 hours. After the reaction is complete, filter and wash with deionized water for 5 times, then wash with absolute ethanol for 3 times, and place Dry at 60°C to obtain hydrotalcite.

[0029] (2) Roasting: the hydrotalcite prepared in step (1) was calcined at 500° C. for 4 hours to prepare a composite double metal oxide.

[0030] (3) Reduction: Disperse 10 g of lignin raw material in 500 ml of deionized water, add sodium hydroxide to adjust the pH to 12 and stir mechanically. After the lignin is fully dissolved, the cellulose, hemicellulose and insoluble impurities in the lignin solution are separated by centrifugation to obtain the purified lignin solution, and then 20 g of the hydrotalcite bismuth prepared in step (2) is added. Metal oxide, fully stirred for 6 hours...

Embodiment 2

[0034] The method in Example 1 was adopted to prepare sheet-like wood-based biochar / hydrotalcite composite nanomaterials, the difference being that divalent metal salt, tri-salt metal salt and urea were respectively 0.15mol NiCl 2 ·6H 2 O, 0.1mol AlCl 3 ·6H 2 O and 0.5mol, other conditions remain unchanged.

[0035]After measurement, the BET specific surface area of ​​the flake wood-based biochar / hydrotalcite composite nanomaterial prepared in this embodiment is 359m 2 / g, the pore volume is 0.35cm 3 / g, and the resistivity is 1.13Ω·m.

Embodiment 3

[0037] The method in Example 1 is adopted to prepare sheet-like wood-based biochar / hydrotalcite composite nanomaterials. The difference is that divalent metal salts, tri-salt metal salts and urea are respectively 0.2mol ZnCl 2 , 0.1mol AlCl 3 ·6H 2 O and 0.3mol urea, other conditions remain unchanged.

[0038] After measurement, the BET specific surface area of ​​the flake wood-based biochar / hydrotalcite composite nanomaterial prepared in this embodiment is 498m 2 / g, the pore volume is 0.46cm 3 / g, and the resistivity is 0.32Ω·m.

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Abstract

The invention relates to a sheet-like lignin-based bio-carbon / hydrotalcite composite nanomaterial and a preparation method thereof. It is prepared from calcined hydrotalcite and lignin raw materials. It is 0.2-0.8cm3 / g, and the resistivity is 0.2-3.0Ω·m, including the following steps: roasting: to obtain composite bimetallic oxide; reduction: to obtain lignin / hydrotalcite composite; high-temperature carbonization: to obtain flaky wood Element-based biocarbon / hydrotalcite composite nanomaterials. The beneficial effects of the present invention are as follows: the problems that the coprecipitation method hydrotalcite flake diameter is small and the purity are not high are avoided, and the aggregation phenomenon caused by the complexation of lignin molecules to metal ions in the synthesis process is also avoided; it is easier to regulate and control The microstructure and product composition of the flake biochar, and the method has the advantages of simple process, low cost and easy industrialization. It can be applied to adsorption, catalysis, energy storage, electromagnetic and other fields.

Description

technical field [0001] The invention relates to a sheet-like lignin-based biocarbon / hydrotalcite composite nanomaterial, a preparation method and application thereof, and belongs to the technical field of material science. Background technique [0002] Carbon materials, such as carbon black, carbon fiber, carbon nanotubes, fullerene, graphene, etc., have extremely wide and important applications in various fields due to their ultra-high mechanical strength and electrical and thermal conductivity. However, these carbon materials usually need to use petrochemical resources as raw materials, use more expensive instruments and equipment, or have complicated production methods, resulting in high cost of carbon materials. Therefore, how to get rid of the dependence of carbon materials on petrochemical resources, reduce production costs, and simplify process methods has become a key issue in the field of carbon materials research. [0003] Among these carbon materials, two-dimensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/00B82Y30/00B82Y40/00
CPCC01P2006/40C01P2006/12C01F7/785Y02P20/54
Inventor 蒋灿刘辉张云飞李亮
Owner WUHAN INSTITUTE OF TECHNOLOGY
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