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An Ag-induced anti-opal tio 2 Preparation method of homojunction photocatalyst

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

Inactive Publication Date: 2020-03-17
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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  • An Ag-induced anti-opal tio <sub>2</sub> Preparation method of homojunction photocatalyst
  • An Ag-induced anti-opal tio <sub>2</sub> Preparation method of homojunction photocatalyst
  • An Ag-induced anti-opal tio <sub>2</sub> Preparation method of homojunction photocatalyst

Examples

Experimental program
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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 an Ag-induced inverse opal TiO 2 Preparation method of homojunction photocatalyst, using closely packed PS microspheres as template, Ag nanoparticles as inducer, and butyl titanate solution as precursor to prepare Ag nanoparticle-induced inverse opal structure TiO 2 Dual-phase homojunction photocatalyst. The invention has the advantages of cheap and easy-to-obtain raw materials, a simple and novel preparation process, and controllable product morphology. The obtained sample exhibits a three-dimensional ordered mesoporous inverse opal structure. This structure can periodically adjust the transmission of light and improve the material's resistance to incident light. absorption, thereby enhancing photocatalytic performance.

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 Patents(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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