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A kind of preparation method of nano titanium dioxide/loofah composite photocatalyst

A technology of nano-titanium dioxide and loofah, which is applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as easy agglomeration, difficult recycling, and easy falling off. Achieve the effect of large specific surface area, solve the problem of difficult recycling and not easy to fall off

Active Publication Date: 2017-01-11
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the deficiencies in the prior art, the purpose of the present invention is to provide a preparation method of nano-titanium dioxide / loofah composite photocatalyst, the method is simple and easy, by this method, nano-titanium dioxide on the natural polymer material The fixed load is realized, and at the same time, it effectively solves the problems of easy agglomeration, high energy consumption, difficult recycling after preparation, and easy falling off during the preparation process.

Method used

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  • A kind of preparation method of nano titanium dioxide/loofah composite photocatalyst
  • A kind of preparation method of nano titanium dioxide/loofah composite photocatalyst
  • A kind of preparation method of nano titanium dioxide/loofah composite photocatalyst

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Embodiment 1

[0029] A kind of preparation method of nano titanium dioxide / loofah composite photocatalyst, its steps are:

[0030] 1) Add the silane coupling agent KH550 to the ethanol solution (the ethanol solution is obtained by adjusting the pH of 95v / v% ethanol to 3.5-4.5 with glacial acetic acid) to obtain a mixture. The mass fraction of KH550 in the mixture is 5wt%, at room temperature Hydrolyzed for 1 hour to obtain a silane coupling agent hydrolyzate;

[0031] 2) Add 5g nano-TiO 2 Place in 500mL of the silane coupling agent hydrolyzate obtained in step 1) and ultrasonically disperse for 15 minutes to form a mixed solution A, then place the mixed solution A in a water bath at 50°C for 1.5 hours, filter, and use ethanol solution (absolute ethanol: water volume ratio =1:4) After washing, vacuum drying at 80°C, and grinding into powder to obtain modified TiO 2 ,spare;

[0032] 3) Put 4.7g of the pretreated loofah into 500mL of the silane coupling agent hydrolyzate obtained in step 1)...

Embodiment 2

[0042] A kind of preparation method of nano titanium dioxide / loofah composite photocatalyst, its steps are:

[0043] 1) Add the silane coupling agent KH550 to the ethanol solution (the ethanol solution is obtained by adjusting the pH of 95v / v% ethanol to 3.5-4.5 with glacial acetic acid) to obtain a mixture. The mass fraction of KH550 in the mixture is 5wt%, at room temperature Hydrolyzed for 1 hour to obtain a silane coupling agent hydrolyzate;

[0044] 2) Add 5g nano-TiO 2 Place in 500mL of the silane coupling agent hydrolyzate obtained in step 1) and ultrasonically disperse for 15 minutes to form a mixed solution A, then place the mixed solution A in a water bath at 50°C for 1.5 hours, filter, and use ethanol solution (absolute ethanol: water volume ratio =1:4) After washing, vacuum drying at 80°C, and grinding into powder to obtain modified TiO 2 ,spare;

[0045] 3) Put 4.7g of the pretreated loofah into 500mL of the silane coupling agent hydrolyzate obtained in step 1)...

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Abstract

The invention belongs to the technical field of a preparation method of a photocatalyst, and discloses a preparation method of a nanometer titanium dioxide / loofah sponge composite photocatalyst. The preparation method comprises the following steps of: respectively carrying out coating modification on photocatalyst nanometer titanium dioxide and natural high-molecular material loofah sponge by utilizing a silane coupling agent, wherein a mechanism is as follows: alkoxy contained in the silane coupling agent reacts with hydroxy contained in a TiO2 surface and hydroxy contained in a loofah sponge surface so as to modify titanium dioxide and loofah sponge and enhance the dispersity of titanium dioxide; carrying out cross-linking reaction on a modified product through a double-functional group cross-linking agent to sufficiently combine nanometer titanium dioxide and loofah sponge so as to realize the loading of nanometer titanium dioxide on the surface of loofah sponge. According to the preparation method, the problems of low possibility in recovery, easiness for falling and the like of the traditional photocatalyst can be solved through the successful loading of nanometer titanium dioxide on loofah sponge and the light degradation property showed by nanometer titanium dioxide; in addition, the loaded material belongs to an environment-friendly material and generates no secondary pollution, so that a new method and direction are provided for removing pollutants contained in an eutrophic water body.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation methods, in particular to a preparation method of nano titanium dioxide / loofah composite photocatalyst, and the composite material can be widely used in the field of water treatment. Background technique [0002] Photocatalytic technology is a green high-tech with important prospects in the environmental field. It has attracted widespread attention in the field of environmental protection, and has been gradually introduced into the research and practice of water treatment, and has produced a large number of research results. Photocatalysts have broad application prospects in environmental protection and energy fields such as water treatment, gas purification, self-cleaning, photolysis hydrogen production, and new material preparation, and have attracted widespread attention. Especially in the field of water treatment, nano-photocatalysts have been applied to the treatment of indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38
Inventor 吴振斌孔令为许鹏贺锋张义徐栋
Owner INST OF AQUATIC LIFE ACAD SINICA