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Preparation method of Ag induced inverse opal TiO2 homojunction photocatalyst

A photocatalyst and inverse opal technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of irregular sample morphology and cumbersome steps, etc. The preparation process is simple and novel, the raw materials are cheap and easy to obtain, and the photocatalytic performance is enhanced.

Inactive Publication Date: 2018-04-06
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Previously reported preparations of dual-phase noble metal-modified dual-phase solid junctions all adopt a two-step or multi-step method, which is cumbersome and the morphology of the prepared samples is irregular.

Method used

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  • Preparation method of Ag induced inverse opal TiO2 homojunction photocatalyst
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  • Preparation method of Ag induced inverse opal TiO2 homojunction photocatalyst

Examples

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Effect test

Embodiment 1

[0017] Example 1: Ag-induced inverse opal TiO 2 The preparation method of the homojunction photocatalyst adopts the following technical scheme:

[0018] Dissolve 13.5mL of styrene and 0.7g of polyvinylpyrrolidone in 100mL of deionized water, stir for 15 minutes, add 0.15g of potassium persulfate and 0.3g of silver nitrate, pass nitrogen gas for 30min to remove the air, then raise the temperature to 70°C for 24 hours. After the reaction, insert a clean glass piece into the aqueous solution containing PS spheres, and place it in a drying oven at 45°C for 4-7 days to evaporate naturally. 10 mL of butyl titanate was dissolved in 10 mL of absolute ethanol, and then 1 mL of nitric acid was added. After stirring for 1 hour, the glass sheet with PS spheres was immersed in butyl titanate solution, and after soaking for 30 minutes, the glass sheet was taken out and dried under natural conditions for 1 hour. The dried glass piece was placed in a tube furnace, raised from room temperatu...

Embodiment 2

[0019] Example 2: Ag-induced inverse opal TiO 2 The preparation method of the homojunction photocatalyst adopts the following technical scheme:

[0020] Dissolve 13.5 mL of styrene and 0.7 g of polyvinylpyrrolidone in 100 mL of deionized water, stir for 15 minutes, add 0.2 g of potassium persulfate and 0.4 g of silver nitrate, pass nitrogen gas for 30 min to remove the air, then raise the temperature to 70°C for 24 hours. After the reaction, insert a clean glass piece into the aqueous solution containing PS spheres, and place it in a drying oven at 45°C for 4-7 days to evaporate naturally. 10 mL of butyl titanate was dissolved in 10 mL of absolute ethanol, and then 1 mL of nitric acid was added. After stirring for 1 hour, the glass sheet with PS spheres was immersed in butyl titanate solution, and after soaking for 30 minutes, the glass sheet was taken out and dried under natural conditions for 1 hour. The dried glass piece was placed in a tube furnace, raised from room temp...

Embodiment 3

[0021] Example 3: Ag-induced inverse opal TiO 2 The preparation method of the homojunction photocatalyst adopts the following technical scheme:

[0022] Dissolve 13.5mL of styrene and 0.7g of polyvinylpyrrolidone in 100mL of deionized water. After stirring for 15 minutes, add 0.3g of potassium persulfate and 0.5g of silver nitrate. After purging the air with nitrogen for 30 minutes, raise the temperature to 70°C for 24 hours. After the reaction, insert a clean glass piece into the aqueous solution containing PS spheres, and place it in a drying oven at 45°C for 4-7 days to evaporate naturally. 10 mL of butyl titanate was dissolved in 10 mL of absolute ethanol, and then 1 mL of nitric acid was added. After stirring for 1 hour, the glass sheet with PS spheres was immersed in butyl titanate solution, and after soaking for 30 minutes, the glass sheet was taken out and dried under natural conditions for 1 hour. The dried glass piece was placed in a tube furnace, raised from room ...

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Abstract

The invention provides a preparation method of an Ag induced inverse opal TiO2 homojunction photocatalyst. The Ag nanoparticle induced TiO2 biphasic homojunction photocatalyst with an inverse opal structure is prepared from PS microspheres in close packing arrangement as a template, Ag nanoparticles as an inducer and a butyl titanate solution as a precursor. The preparation method has the advantages that the raw materials are cheap and easily available, the preparation process is simple and novel, the morphology of the product is controllable, an obtained sample is of a three-dimensional ordered mesoporous inverse opal structure, by means of the structure, light transmission can be regulated periodically, incident light absorption of the material can be improved, and the photocatalytic performance is enhanced.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation, in particular to a method for preparing an Ag-induced inverse opal TiO2 homojunction photocatalyst. Background technique [0002] A photocatalyst with a homojunction structure can generate a built-in electric field inside, thereby effectively accelerating the transfer rate of photogenerated electrons-holes at the interface and preventing the recombination of photogenerated charge carriers. , magnetism, adsorption and catalysis and other physical and chemical fields have great application prospects. [0003] TiO 2 As an environmentally friendly multifunctional material, it is widely used in photolysis of water, synthesis of organic matter, degradation of pollutants in water, solar cells, gas sensors and other fields due to its economy, high efficiency and non-toxicity. Therefore, the preparation of TiO 2 Homojunction photocatalysts have great application prospects. In additio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04
CPCB01J23/04B01J35/39
Inventor 师进生张原原王丽丽蒋海燕任春艳曲郸
Owner QINGDAO AGRI UNIV
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