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an ag/agcl/tio 2 Composite photocatalytic material, preparation method and application thereof

A composite photocatalysis and application technology, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve outstanding problems, and achieve the effect of simple conditions, excellent photocatalytic degradation activity, and performance improvement

Active Publication Date: 2020-03-17
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the use of Ag / AgX (X=Cl, Br, I) to support TiO 2 The research of surface plasmon photocatalyst mainly focuses on improving the photocatalytic performance of visible light, the degradation of organic dyes (CN104941615A) and the application as catalytic bactericidal material (CN105148888A). 2 Research Report on the Degradation of Organic Pollutants in the Gas Phase by Surface Plasmon Photocatalysts

Method used

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  • an ag/agcl/tio <sub>2</sub> Composite photocatalytic material, preparation method and application thereof
  • an ag/agcl/tio <sub>2</sub> Composite photocatalytic material, preparation method and application thereof
  • an ag/agcl/tio <sub>2</sub> Composite photocatalytic material, preparation method and application thereof

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preparation example Construction

[0038] In one embodiment of the present application, a Ag / AgCl / TiO 2 The preparation method of composite photocatalytic material, the steps are as follows:

[0039] With spherical titanium dioxide as carrier, silver nitrate as silver source, 1-octyl-3-methylimidazolium chloride salt or hydrochloric acid solution as chlorine source, AgCl is loaded on the surface of spherical titanium dioxide; after photoreduction, the surface of spherical titanium dioxide Silver ions in AgCl are reduced to elemental silver to obtain Ag / AgCl / TiO 2Composite photocatalytic materials.

[0040] As a preferred solution, the method of loading AgCl on the surface of spherical titanium dioxide can adopt hydrothermal co-precipitation method and immersion co-precipitation method.

[0041] Wherein, the method for loading AgCl by the hydrothermal co-precipitation method has the following steps:

[0042] (1) Add 1-octyl-3-methylimidazolium chloride salt, titanium dioxide and PVP into deionized water, stir...

Embodiment 1

[0052] Example 1: Ag / AgCl / TiO 2 Preparation of composite photocatalytic materials

[0053] Specific steps are as follows:

[0054] (1) Preparation of TiO by solvothermal method 2 Precursor:

[0055] First, measure 90ml of glacial acetic acid with a measuring cylinder and pour it into a 150ml beaker, then add 3.0ml of tetrabutyl titanate dropwise into the glacial acetic acid with a pipette gun, and keep stirring for 60 minutes. After the stirring was completed, the obtained white emulsion was transferred to a 120ml polytetrafluoroethylene-lined autoclave, and then the autoclave was placed in a temperature-controlled oven at 150°C for 12 hours of reaction. After the reaction, take out the reaction kettle, cool it down to room temperature naturally, and finally wash the precipitate with absolute ethanol 2-3 times during the suction filtration process, and dry it at 60-70°C to obtain TiO 2 Precursor powder.

[0056] (2) Preparation of anatase phase TiO 2 :

[0057] A certai...

Embodiment 2

[0063] Example 2: Ag / AgCl / TiO 2 Preparation of composite photocatalytic materials

[0064] Specific steps are as follows:

[0065] (1) Preparation of TiO by solvothermal method 2 Precursor:

[0066] First, measure 90ml of glacial acetic acid with a measuring cylinder and pour it into a 150ml beaker, then add 3.0ml of tetrabutyl titanate dropwise into the glacial acetic acid with a pipette gun, and keep stirring for 60 minutes. After the stirring was completed, the obtained white emulsion was transferred to a 120 ml polytetrafluoroethylene-lined autoclave, and then the autoclave was placed in a temperature-controlled oven at 150° C. for 12 hours. After the reaction, take out the reaction kettle, cool it down to room temperature naturally, and finally wash the precipitate with absolute ethanol 2-3 times during the suction filtration process, and dry it at 60-70°C to obtain TiO 2 Precursor powder.

[0067] (2) Preparation of anatase phase TiO 2 :

[0068] A certain mass of...

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Abstract

The invention discloses Ag / AgCl / TiO 2 Composite photocatalytic material and its preparation method and application. The substrate material of the catalyst is titanium dioxide, and particles AgCl and Ag are loaded on the surface of the substrate material. First, the titanium dioxide precursor is synthesized by solvothermal method, and then the anatase phase titanium dioxide is obtained by high-temperature calcination. Finally, titanium dioxide is used as the carrier, silver nitrate is used as the silver source and 1-octyl-3-methylimidazolium chloride salt or hydrochloric acid solution It is a chlorine source, and the AgCl loading method can be divided into two types: hydrothermal co-precipitation and immersion precipitation, and then the product Ag / AgCl / TiO is obtained through light reduction treatment. 2 . The preparation method is simple and easy to operate, and the synthesized Ag / AgCl / TiO 2 The microspheres have strong photocatalytic activity and have excellent performance in the photocatalytic degradation of ethylene and benzene and other volatile organic pollutants.

Description

technical field [0001] The invention relates to the technical field of air pollution treatment and photocatalytic material preparation, in particular to an Ag / AgCl / TiO 2 Composite photocatalytic material and its preparation method and application. Background technique [0002] As the current environmental pollution problem is becoming more and more serious, air pollution has seriously affected people's physical and mental health. The research on photocatalyst treatment of air pollution has become the focus and hotspot of catalytic science research. In the field of photocatalysis, titanium dioxide has become one of the most important semiconductor photocatalysts due to its excellent photocatalytic performance, good chemical stability, safety and non-toxicity, and low cost. Sewage treatment and many other fields have received widespread attention from scientists. Therefore, it will have very important strategic and practical significance to carry out in-depth research on com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/135B01D53/86B01D53/72B01D53/44
CPCB01D53/8668B01D53/8687B01J27/135B01J35/33
Inventor 王朋梁希壮黄柏标张晓阳秦晓燕王泽岩刘媛媛张倩倩
Owner SHANDONG UNIV
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