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A kind of ultramicronano silver phosphate/titanium dioxide nanoflower composite material and its preparation method and application

A technology of titanium dioxide and composite materials, applied in the fields of nanomaterials and photocatalysis, can solve the problems of insufficient light absorption of titanium dioxide, difficult recovery of photocatalysts, poor stability of silver phosphate, etc., and achieves improved photocatalytic performance, increased scattering performance, and increased adsorption sites. and the effect of reactive sites

Active Publication Date: 2020-04-24
ZHEJIANG UNIV CITY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the above problems, to provide a preparation method of ultra-micronano silver phosphate / titanium dioxide nanoflower composite material, which solves the problems of insufficient light absorption of titanium dioxide, low light utilization rate, poor stability of silver phosphate and recovery of photocatalysts in the prior art. Difficulty and other issues

Method used

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  • A kind of ultramicronano silver phosphate/titanium dioxide nanoflower composite material and its preparation method and application
  • A kind of ultramicronano silver phosphate/titanium dioxide nanoflower composite material and its preparation method and application
  • A kind of ultramicronano silver phosphate/titanium dioxide nanoflower composite material and its preparation method and application

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Embodiment 1

[0022] Step 1: Add 0.025 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 1.125 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 200° C. for 24 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in a 60°C oven, dried for 24 hours, and finally the reactant was placed in a muffle furnace with a heating rate of 1°C / min and a heat treatment temperature of 550°C , and annealed for 2 hours to obtain the precursor titania nanoflower material.

[0023] Step 2: Step 2: Stir and disperse 100mg of the precursor titanium dioxide nanoflower material in 30mL of ethanol, and disperse it evenly with moderate ultrasound; weigh 200mg of silver nitrate and dissolve it in a solution of ammonia water with a mass fraction of 1% and a...

Embodiment 2

[0028]Step 1: Add 0.025 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 1.125 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 200° C. for 24 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in a 60°C oven, dried for 24 hours, and finally the reactant was placed in a muffle furnace with a heating rate of 1°C / min and a heat treatment temperature of 550°C , and annealed for 2 hours to obtain the precursor titania nanoflower material.

[0029] Step 2: Step 2: Stir and disperse 100mg of the precursor titanium dioxide nanoflower material in 30mL of ethanol, and disperse it evenly with moderate ultrasound; weigh 400mg of silver nitrate and dissolve it in a solution of ammonia water with a mass fraction of 2% and a ...

Embodiment 3

[0033] Step 1: Add 0.125 mL of diethylenetriamine (EDTA) to 31.5 mL of isopropanol, and stir for 10 min. Then, 4.5 mL of diisopropyl di(acetylacetonato)titanate was added to the solution. Stirring was continued for 10 min. The resulting mixed solution was poured into a reaction kettle, and subjected to solvent heat treatment at 220° C. for 24 hours. After the reaction, the precipitate was washed three times with deionized water and absolute ethanol, placed in a 60°C oven, dried for 24 hours, and finally placed in a muffle furnace with a heating rate of 10°C / min and a heat treatment temperature of 550°C , and annealed for 2 hours to obtain the precursor titania nanoflower material.

[0034] Step 2: Step 2: Stir and disperse 100mg of the precursor titanium dioxide nanoflower material in 30mL of ethanol, and disperse it evenly with moderate ultrasound; weigh 200mg of silver nitrate and dissolve it in a solution of ammonia water with a mass fraction of 1% and a volume of 10ml, ...

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Abstract

The invention discloses a method for preparing ultrafine nanosilver phosphate / titanium dioxide nanoflower composite material. The ultrafine silver phosphate / titanium dioxide nanoflower composite material prepared by the invention is composed of titanium dioxide nanoflowers and ultrafine silver phosphate nanoparticles. Among them, titanium dioxide nanoflowers are formed by self-assembly of ultra-thin titanium dioxide nanosheets, with a size of 500-1000nm. Titanium dioxide nanoflowers can provide a large specific surface area to load silver phosphate particles. The size of the silver phosphate particles is 1-4nm, and ultrafine silver phosphate nanoparticles are evenly deposited on the titanium dioxide nanoflowers. The ultrafine silver phosphate / titanium dioxide nanoflower composite material of the present invention is an efficient and stable visible light catalyst. The composite nanomaterial is prepared by a simple method, the preparation process is simple, the reaction conditions are easy to control, and it is suitable for large-scale preparation and industrial production.

Description

technical field [0001] The invention relates to an ultramicronano silver phosphate / titanium dioxide nanoflower composite material and a preparation method and application thereof, belonging to the technical field of nanomaterials and photocatalysis. Background technique [0002] The two major challenges facing the sustainable development of mankind in the 21st century are energy issues and environmental issues. Solar energy has the advantages of being clean, cheap, and renewable, so it is the goal of people to use, convert, and store solar energy efficiently and quickly. Semiconductor photocatalysis technology is centered on the chemical conversion and storage of solar energy, and the photodegradation of organic matter through solar energy is expected to solve the problem of industrial pollution. [0003] As a new type of visible light responsive semiconductor photocatalytic material, silver phosphate is widely used in water treatment, photolysis of water, waste gas treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18B01J35/02C02F1/30C02F101/36C02F101/38B01J35/00
CPCC02F1/30B01J27/1817C02F2101/308C02F2101/36C02F2101/38C02F2305/10B01J35/39B01J35/00B01J35/30
Inventor 胡海华
Owner ZHEJIANG UNIV CITY COLLEGE
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