Even compact and transparent laminated double-metal hydroxide film and preparation method thereof

A layered bimetallic and hydroxide technology, which is applied in chemical instruments and methods, iron compounds, nickel compounds, etc., can solve the problems that hinder the application and development of LDHs materials, deviceization, and the difficulty of preparing LDHs into thin films, so as to achieve easy operation , Simple equipment, low energy consumption

Inactive Publication Date: 2008-04-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Unlike other layered materials, LDHs are not easy to prepare thin films, which hinders some application development and deviceization of LDHs materials.

Method used

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  • Even compact and transparent laminated double-metal hydroxide film and preparation method thereof
  • Even compact and transparent laminated double-metal hydroxide film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step A: 1.1604g (0.004mol) of solid Ni(NO 3 ) 2 .6H 2 O and 0.7503g (0.002mol) of solid Al(NO 3 ) 3 .9H 2 O dissolved in 20ml of deCO 2 in the water.

[0024] Step B: Measure 0.54ml of concentrated ammonia water with a mass percentage concentration of 28%, and dilute to 20ml to obtain dilute ammonia water with a mass percentage concentration of 0.68%.

[0025] Step C: Put the mixed salt and lye in different petri dishes, react in a sealed desiccator, the reaction temperature is 25°C, and the reaction time is 24h. Part of the film on the surface of the salt solution is taken out and used to remove CO 2 After washing with water three times, it was transferred to a clean silicon substrate for drying at low temperature to obtain a membrane sample. The remaining membrane samples were taken out and washed by centrifugation, dried at 60 °C for 24 h and ground to obtain Ni 2 AlNO 3 LDHs powder.

[0026] The IR spectrum of the film powder is at 1384cm -1 The strong an...

Embodiment 2

[0028] Step A: 4.3360g (0.016mol) of solid Zn(NO 3 ) 2 .6H 2 O and 3.0012g (0.008mol) of solid Al(NO 3 ) 3 .9H 2 O dissolved in 80ml of deCO 2 in the water.

[0029] Step B: Measure 2.16ml of concentrated ammonia water with a mass percentage concentration of 28%, and dilute to 80 ml to obtain dilute ammonia water with a mass percentage concentration of 0.68%.

[0030] Step C: Put the mixed salt and lye in different petri dishes, react in a sealed desiccator, the reaction temperature is 25°C, and the reaction time is 24h. Part of the film on the surface of the salt solution is taken out and used to remove CO 2After washing with water three times, it was transferred to a clean silicon substrate for drying at low temperature to obtain a film sample. The remaining membrane samples were taken out and washed by centrifugation, dried at 60°C for 24 hours and ground to obtain Zn 2 AlNO 3 LDHs powder.

[0031] The IR spectrum of the film powder is at 1384cm -1 The strong and...

Embodiment 3

[0033] Step A: 1.1604g (0.004mol) of solid Ni(NO 3 ) 2 .6H 2 O and 0.8080g (0.002mol) of solid Fe(NO 3 ) 3 .9H 2 O dissolved in 80ml of deCO 2 in the water.

[0034] Step B: Measure 1.25ml of concentrated ammonia water with a mass percentage concentration of 28%, and dilute to 20ml to obtain dilute ammonia water with a mass percentage concentration of 1.57%.

[0035] Step C: Put the mixed salt and lye in different petri dishes, react in a sealed desiccator, the reaction temperature is 25°C, and the reaction time is 24h. Part of the film on the surface of the salt solution is taken out and used to remove CO 2 After washing with water three times, it was transferred to a clean silicon substrate for drying at low temperature to obtain a membrane sample. The remaining membrane samples were taken out and washed by centrifugation, dried at 60 °C for 24 h and ground to obtain Ni 2 FeNO 3 LDHs powder.

[0036] The IR spectrum of the film powder is at 1384cm -1 The strong an...

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Abstract

The invention discloses a uniform, compact and transparent layered double metal hydroxide film and the preparing method thereof, and belongs to the technical field of layered double metal hydroxides. The general chemical formula of the film layer LDHs is [M<2+>1-xM<3+>x (OH) 2]<X+> (A<N->) x/n*mH2O, wherein, M<2+> represents any one of Mg<2+>, Ni<2+> and Zn <2+>; M<3+> represents either one of Al<3+> and Fe<3+>; A<N-> is any one of NO3<->, Cl<-> and SO4<2->; x is larger than or equal to 0.2 and less than or equal to 0.4; m is larger than or equal to 0 and less than or equal to 2. The preparing method needs not a base piece for support, and refers to gas-liquid interface method to prepare the uniform, compact and transparent LDHs film on an air-water interface under the joint effect of surface tension of the solution and pH gradients. The invention has the advantage that the film is formed on a gas-liquid interface without the need of a base piece for support, thereby overcoming influence of the base piece on preparation of the LDHs film; the reaction occurs at normal temperature and has lower energy consumption; the equipment is simple and easy to operate.

Description

[0001] Field [0002] The invention belongs to the field of layered double metal hydroxides, and in particular provides a uniform, dense and transparent layered double metal hydroxide film and a preparation method thereof, which prepares uniform, dense and transparent layered double metal hydrogen at the air-water interface oxide film. Background technique [0003] Layered double hydroxides, also known as hydrotalcites (LDHs), are important inorganic functional materials. LDHs have a layered structure, and the element composition of the main layer and the type and quantity of the guest anion between the layers are all adjustable. These characteristics make LDHs have a variety of excellent physical and chemical properties, and show extremely broad application prospects in many fields such as ion exchange, adsorption, catalysis, polymer modification, optical materials, magnetic materials, and electrical materials. At present, the research and application of LDHs at home and ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G1/00
CPCC01P2002/82C01P2002/72C01G9/006C01P2002/88C01G49/009C01P2004/64C01P2002/22C01P2004/03C01G53/006B82Y30/00
Inventor 王连英张英超王祎鹏尹平
Owner BEIJING UNIV OF CHEM TECH
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