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Titanate nanosheet photocatalytic membrane material, as well as preparation method and application thereof

A photocatalytic film and nanosheet technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of a wide range of applications, high transparency, good recycling performance and reuse performance

Inactive Publication Date: 2015-03-04
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant report on enhancing the activity of photocatalytic degradation of organic pollutants through transparent, flexible, unsupported photocatalytic membranes assisted by hydrogen peroxide.

Method used

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  • Titanate nanosheet photocatalytic membrane material, as well as preparation method and application thereof
  • Titanate nanosheet photocatalytic membrane material, as well as preparation method and application thereof
  • Titanate nanosheet photocatalytic membrane material, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 3.22g of anhydrous potassium carbonate (commercially available), 0.55g of anhydrous lithium carbonate (commercially available), and 7.68g of titanium oxide (commercially available) and mix and grind for 1 hour, then calcinate at 1000°C for 20 hours to obtain a 10g alkali metal layer Titanate K 0.8 Ti 1.73 Li 0.27 o 4 ;

[0028] Weigh 2.3g of the above-mentioned alkali metal layered titanate K 0.8 Ti 1.73 Li 0.27 o 4 , impregnated in 200mL with a concentration of 1mol L -1 Hydrochloric acid aqueous solution, replace the aqueous hydrochloric acid solution once a day, filter and wash after three days, and obtain 2 g of layered protonated titanate H after drying at 25 ° C 1.07 Ti 1.73 o 4 ·H 2 O;

[0029] Weigh 1 g of the above layered protonated titanate H 1.07 Ti 1.73 o 4 ·H 2 O, immersed in 250 mL of water, adding 0.6 mL of commercially available ethylamine aqueous solution containing 0.408 g of ethylamine, and mechanically shaking for 24 hours to o...

Embodiment 2

[0031] (1) The sol containing 40 mg titanate nanosheets prepared in Example 1 is added to a filter equipped with a microporous membrane (5 cm in diameter, and the pore size of the microporous membrane is 0.45 micron);

[0032] (2) Under reduced pressure, the titanate nanosheets are suction-filtered to form a titanate nanosheet film;

[0033] (3) Soak the titanate nanosheet membrane obtained in step (2) with 0.1mol / L hydrochloric acid aqueous solution, wash with deionized water, dry at room temperature 25°C for 24 hours, and finally remove it from the microporous membrane to obtain a transparent , flexible, unsupported photocatalytic film, that is, titanate nanosheet photocatalytic film material.

[0034] Such as figure 1 Shown is the titanate nanosheet photocatalytic film material prepared in Example 2, which is a transparent, flexible, unsupported photocatalytic film.

Embodiment 3

[0036] (1) Add the sol containing 40mg titanate nanosheets prepared in Example 1 into a petri dish (5 cm in diameter);

[0037] (2) Carry out solvent evaporation at room temperature 25 ℃, form titanate nanosheet film;

[0038](3) Soak the titanate nanosheet film obtained in step (2) with 0.1mol / L hydrochloric acid aqueous solution, wash with deionized water, dry at room temperature 25°C for 24 hours, and finally peel off from the petri dish to obtain a transparent, The flexible, unsupported photocatalytic membrane is a titanate nanosheet photocatalytic membrane material.

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Abstract

The invention discloses a high-activity titanate nanosheet photocatalytic membrane material, as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) adding a sol containing titanate nanosheets into a culture dish or a filter provided with a microfiltration membrane, and conducting solvent evaporation in the culture dish, or conducting suction filtration on the titanate nanosheets under the condition of pressure reduction in the filter to form a titanate nanosheet membrane; 2) soaking the obtained titanate nanosheet membrane in an acid solution, washing in water, and drying to obtain the titanate nanosheet photocatalytic membrane material which is an unsupported, transparent and flexible photocatalytic membrane. As the prepared titanate nanosheet photocatalytic membrane material is the unsupported, transparent and flexible photocatalytic membrane, under the assistance of hydrogen peroxide, the titanate nanosheet photocatalytic membrane material has quite high activity on photocatalytic degradation of organic pollutants, the preparation method is simple and easy to popularize, and the raw material is low in price, easy to get and beneficial to mass production.

Description

technical field [0001] The invention relates to the field of photocatalyst preparation and photocatalytic environmental treatment, in particular to a transparent, flexible and unsupported titanate nanosheet photocatalytic film material with extremely high activity assisted by hydrogen peroxide. Background technique [0002] The high development of society and industrialization has made environmental pollution, especially water pollution, one of the problems that seriously hinder the development of human society. How to effectively treat industrial and domestic sewage is of great significance to the sustainable development of human society. As a new and promising environmental pollution treatment technology, semiconductor photocatalysis has the characteristics of green and pollution-free, low energy consumption, less land occupation, high efficiency and wide application range. [0003] Among numerous photocatalytic materials, titanium oxide has been widely studied due to its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/02C02F1/30C02F1/72C02F101/30B01J35/00
CPCY02W10/37
Inventor 董晓平陈沁沁罗俊杰
Owner ZHEJIANG SCI-TECH UNIV
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