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Porous magnesium silicate composite adsorption film and preparation method thereof

A composite adsorption, magnesium silicate technology, applied in the direction of magnesium silicate, silicate, silicon compounds, etc., can solve the problems of increasing risk, limiting the scope of use of materials, single carrier, etc., achieving easy operation and broad market application prospects , the effect of simple preparation process

Inactive Publication Date: 2018-05-25
南京凯特莱斯环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, this method uses silane as a silicon source, which inevitably requires the use of flammable and explosive organic substances such as methanol and ethanol as a solvent for silane during the reaction, which increases the risk of large-scale production.
On the other hand, the carrier is single, which limits the scope of use of materials

Method used

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  • Porous magnesium silicate composite adsorption film and preparation method thereof
  • Porous magnesium silicate composite adsorption film and preparation method thereof
  • Porous magnesium silicate composite adsorption film and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0027] The base material in this embodiment is carbon fiber material, preferably carbon paper. Of course, those skilled in the art know that the carbon fiber material here is not limited to carbon paper, and all carbon fiber materials that can realize the present invention are included, such as carbon cloth, graphene, carbon nanotube products and the like.

[0028] Step A: Soak the carbon paper in concentrated nitric acid solution for 2-6h, preferably 6h, to fully modify the surface, wash the surface with water, and then place it in an oven at 60-80°C for 10-30min, preferably at 80°C Dry for 15min;

[0029] Step B: 0.4 g (1.6 mmol) MgSO 4 ·7H 2 O and 2.4g (17.1mmol) of hexamethylenetetramine were dissolved in 50mL of deionized water to prepare a mixed solution with magnesium and alkali concentrations of 0.032mol / L and 0.342mol / L, respectively. In the mixed solution, and sonicated for 10-30min, preferably 30min, transfer the sonicated carbon paper and the solution together i...

Embodiment 2

[0033] The base material in this embodiment is a polymer material, preferably polyvinyl fluoride. Of course, those skilled in the art know that the polymer material here is not limited to polyvinyl fluoride, and any polymer material that can realize the present invention is included, such as epoxy resin, phenolic plastic, polyacrylonitrile fiber, and the like.

[0034] Step A: Soak the polyvinyl fluoride film in concentrated nitric acid solution for 2-6 hours, preferably 2 hours, to fully modify the surface, wash the surface with water, and then dry it in an oven at 60-80°C for 10-30 minutes, preferably at 60 ℃ oven drying for 30min;

[0035] Step B: 0.7g (3.4mmol) MgCl 2 ·6H 2 O is dissolved in 50mL deionized water together with 4.8g (34.2mmol) hexamethylenetetramine and is mixed with magnesium and alkali concentration and is the mixed solution of 0.064mol / L and 0.684mol / L respectively, gets the gained polyvinyl fluoride film of step A 3×3cm placed in the mixed solution, a...

Embodiment 3

[0039] The base material in this embodiment is a ceramic material, preferably alumina ceramics. Certainly, those skilled in the art know that the ceramic materials here are not limited to alumina ceramics, and all ceramic materials that can realize the present invention are included, such as magnesia porcelain, steatite porcelain, and the like.

[0040] Step A: Soak alumina ceramics in concentrated sulfuric acid solution for 2-6 hours, preferably 4 hours, to fully modify the surface, wash the surface with water, and dry in an oven at 60-80°C for 10-30min, preferably in an oven at 80°C Dry for 30min;

[0041] Step B: 0.4g (1.6mmol) Mg(NO 3 ) 2 ·6H 2 O and 2.1g (34.2mmol) urea were dissolved in 50mL deionized water to prepare a mixed solution with concentrations of magnesium and alkali of 0.032mol / L and 0.684mol / L respectively, and 3×3cm of alumina ceramics obtained in step A were placed in the mixing solution. solution, and ultrasonic 5 ~ 30min, preferably 20min. Transfer ...

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Abstract

The invention provides a porous magnesium silicate composite adsorption film and a preparation method thereof. Firstly, a two-step hydrothermal method is used; a basic magnesium carbonate thin sheet grows on a substrate; then, the basic magnesium carbonate thin sheet is used as a magnesium source for preparing magnesium silicate; finally, the porous magnesium silicate composite adsorption film ofa hierarchical pore structure is obtained. Compared with a conventional Stober method which is shown in the description, the method provided by the invention has the advantages that the condition thatinflammable and explosive organic solutions such as ethanol are used as solvents is avoided; by using the method, more materials can be selected as substrates; meanwhile, the preparation process is simple and green; the large-scale production is favorably realized. Compared with a single powder adsorbing material, the composite adsorption film has the advantages that the operation is simple and convenient, and the separation and the recovery are easy; the adsorption performance on heavy metal ions is excellent; wide market application prospects are realized. The invention also provides the porous magnesium silicate composite adsorption film; the porous magnesium silicate composite adsorption film is of the hierarchical pore structure.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of inorganic functional materials, and in particular relates to a material of a porous magnesium silicate composite adsorption membrane and a preparation method thereof. The material can be used in the fields of adsorption and separation of metal ions. Background technique: [0002] my country is one of the countries with the poorest per capita water resources in the world, but at the same time, with the rapid development of my country's industry, a large amount of industrial wastewater containing toxic and harmful heavy metal ions flows into the ecosystem. According to the "2015 China Environmental Status Bulletin" issued by the Ministry of Environmental Protection, more than 60% of my country's groundwater resources are polluted, and the content of various toxic and harmful metal ions is seriously exceeding the standard. Safety accidents caused by heavy metal pollution have also occurred f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/32C01B33/22C02F1/28C02F101/20
CPCB01J20/10B01J20/28033B01J20/3234C01B33/22C01P2002/72C01P2004/03C02F1/281C02F1/288C02F2101/20
Inventor 冯拥军黄人瑶
Owner 南京凯特莱斯环保科技有限公司
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