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Preparation method for lamellar inorganic-organic composite energy storage and conversion material

An energy storage, organic technology, applied in the field of energy storage and conversion material preparation, which can solve problems such as single material structure

Inactive Publication Date: 2012-07-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material obtained by the preparation method has a single structure and stable properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation of Mg-Al-CO with Molar Mg / Al Ratio of 2.0 by Co-precipitation 3 Hydrotalcite, disperse it in water, add dropwise 0.5M hydrochloric acid solution at 70°C, control pH = 5, react for 4 hours, filter with suction, wash to obtain Mg-Al-Cl hydrotalcite filter cake, and filter this Disperse the cake in ethylene glycol, add ethyl orange (EO) ethylene glycol solution (by mole ratio n (ethyl orange) / n (hydrotalcite) = 3) at 70°C to react for 10 hours, filter with suction, wash with water, dry. The layered Mg-Al-ethyl orange hydrotalcite is obtained, and the fluorescence emission intensity of the material is greatly enhanced.

Embodiment 2

[0015] Preparation of Mg-Al-CO with Molar Mg / Al Ratio of 2.0 by Co-precipitation 3 Hydrotalcite, disperse it in water, add dropwise 0.5M hydrochloric acid solution at 70°C, control pH = 5, react for 4 hours, filter with suction, wash to obtain Mg-Al-Cl hydrotalcite filter cake, and filter this The cake is dispersed in ethylene glycol, and 4-aminoazophenyl-4-sulfonate (4A-4S) ethylene glycol solution is added at 90°C (by molar ratio n(4A-4S) / n(hydrotalcite) =3) React for 6 hours, filter with suction, wash with water, and dry. The layered Mg-Al-4A-4S hydrotalcite is obtained, and the fluorescence emission intensity of this material is greatly weakened.

Embodiment 3

[0017] Preparation of Zn-Al-CO with Molar Zn / Al Ratio of 2.0 by Co-precipitation 3 Hydrotalcite, disperse it in ethylene glycol, add 4-methoxyphenylacetic acid (4-MAA) and 2-naphthalenesulfonic acid (2-NSA) at 90°C [by molar ratio n(4-MAA): n(2-NSA)=1:1]Ethylene glycol solution (by molar ratio n(4-MAA):n(2-NSA):n(hydrotalcite)=2:2:1) was reacted for 10 hours, pumped Filter, wash with water, and dry. That is, the layered Zn-Al-4-MAA-2-NSA hydrotalcite is obtained, and the energy transfer between the donor and the acceptor in the guest between layers of the material is produced, and it has the performance of fluorescence emission energy transfer.

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Abstract

The invention belongs to the field of preparation of energy storage and conversion materials and particularly relates to a preparation method for a lamellar inorganic-organic composite energy storage and conversion material, which uses lamellar hydrotalcite-like compounds as a main body and uses a fluorescent chromophore with donor-receptor properties as an object. The preparation method comprises the steps that the lamellar inorganic-organic composite energy storage and conversion material is prepared by the hydrotalcite-like compounds and the fluorescent chromophore through the ion exchange reaction in ethylene glycol dispersion media. The hydrotalcite-like compounds are magnalium hydrotalcite, zinc-aluminum hydrotalcite or cobalt-aluminum hydrotalcite, the organic fluorescent chromophore comprises ethyl orange, 4-amino azo phenyl-4 sulfonate, 4-methoxyphenylacetic acid, 2-naphthalene sulfonic acid and coumarin-3-formic acid or 9-anthracenecarboxylic acid. A prepared product has a lamellar structure and specific fluorescence storage and conversion performance. The invention aims at developing the preparation method for the lamellar inorganic-organic composite energy storage and conversion material and adopts the ion exchange reaction so that three wastes including waste gas, waste water and waste residues are not produced in the preparation process.

Description

technical field [0001] The invention belongs to the field of preparation of energy storage and conversion materials, in particular to a preparation method of layered inorganic-organic composite materials. technical background [0002] At present, the fluorescent materials commonly used at home and abroad are mainly organic compounds, which are expensive, poor in stability and service life. Hydrotalcite-like is a kind of anionic inorganic layered structure material, its chemical formula is [M 2+ 1-x m 3+ x (OH) 2 ] x- A x / n n- mH 2 O, where M 2+ Can be Mg 2+ , Zn 2+ or Co 2+ and other divalent metal ions, M 3+ Al 3+ 、Cr 3+ or Fe 3+ and other trivalent metal ions, x satisfies 0.2≤x≤0.4, A n- Represents interlayer anions such as CO 3 2- , NO 3 - or Cl - . This type of material laminate has a permanent positive charge, and there are exchangeable anions between the layers to maintain the balance of the charge. Through ion exchange, different groups can be e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
Inventor 李蕾朱凯张立
Owner BEIJING UNIV OF CHEM TECH
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