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

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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 preparation method of an ultra-micro nano silver phosphate / titanium dioxide nanoflower composite material. The prepared ultra-micro silver phosphate / titanium dioxide nanoflower composite material is compounded from titanium dioxide nanoflower and ultra-micro silver phosphate particles, wherein the titanium dioxide nanoflower is formed by ultra-thin titanium dioxide nanosheets in a self-assembling manner, and the size of the titanium dioxide nanoflower is 500-1000 nm. By the titanium dioxide nanoflower, large-specific-surface-area loaded silver phosphate particles canbe provided, the size of the silver phosphate particles is 1-4 nm, and moreover, the ultra-micro silver phosphate nano particles are uniformly deposited on the titanium dioxide nanoflower. The ultra-micro nano silver phosphate / titanium dioxide nanoflower composite material is an effective and stable visible-light-driven photocatalyst, the composite nano material is prepared by a simple method, thepreparation process is simple, reaction conditions are easily controlled, and the ultra-micro nano silver phosphate / titanium dioxide nanoflower composite material is suitable for being prepared on alarge scale and produced industrially.

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): B01J27/18B01J35/02C02F1/30C02F101/36C02F101/38
CPCB01J27/1817B01J35/004B01J35/02C02F1/30C02F2101/308C02F2101/36C02F2101/38C02F2305/10
Inventor 胡海华
Owner ZHEJIANG UNIV CITY COLLEGE
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