Silver phosphate/silver/titanium dioxide nanoflower composite and preparation method and application thereof

A technology of titanium dioxide and composite materials, applied in the field of nanomaterials and photocatalysis, can solve the problems of insufficient light absorption of titanium dioxide, difficulty in photocatalyst recovery, poor stability of silver phosphate, etc., to increase multiple scattering performance, expand absorption range, and increase adsorption sites Effects of points and reaction sites

Active Publication Date: 2018-09-28
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 silver phosphate / silver / 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 difficulty in photocatalyst recovery in the prior art. And other issues

Method used

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  • Silver phosphate/silver/titanium dioxide nanoflower composite and preparation method and application thereof
  • Silver phosphate/silver/titanium dioxide nanoflower composite and preparation method and application thereof
  • Silver phosphate/silver/titanium dioxide nanoflower composite and preparation method and application thereof

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Experimental program
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Effect test

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 an oven at 60°C, dried for 24 hours, and finally placed in a muffle furnace with a heating rate of 1°C / min and a heat treatment temperature of 450°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 volume of 10...

Embodiment 2

[0030] 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 an oven at 60°C, dried for 24 hours, and finally placed in a muffle furnace with a heating rate of 1°C / min and a heat treatment temperature of 450°C , and annealed for 2 hours to obtain the precursor titania nanoflower material.

[0031] 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 volume of 10...

Embodiment 3

[0035] 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 450°C , and annealed for 2 hours to obtain the precursor titania nanoflower material.

[0036] 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 to obtain ...

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Abstract

The invention discloses silver phosphate/silver/titanium dioxide nanoflower composite and a preparation method and application thereof. The silver phosphate/silver/titanium dioxide nanoflower composite prepared herein is a Z-Scheme heterogenous structure made by compositing superfine silver phosphate nanoparticles, silver nanoparticles and titanium dioxide nanoflowers. The titanium dioxide nanoflowers are formed by self-assembly of ultrathin titanium dioxide nanosheet, providing large specific surface area and rich oxygen vacancies. Few silver ions are subjected to oxygen vacancy reduction bythe titanium dioxide nanoflowers and are deposited evenly on the surface of the titanium dioxide nanoflowers in reduced manner; the silver ions are in tight interfacial contact with the titanium dioxide nanoflowers; the surface of the silver nanoparticles is coated with a layer of silver phosphate nanoparticles by means of simple chemical coprecipitation. The silver phosphate/silver/titanium dioxide nanoflower composite herein is an efficient stable photoelectric conversion material; the preparation method of simple chemical preparation is simple, reaction conditions are easy to control, and the preparation method is applicable to large-scale preparation and industrial production.

Description

technical field [0001] The invention relates to a silver phosphate / silver / titanium dioxide nanoflower composite material and a preparation method and application thereof, belonging to the technical field of nanometer materials and photocatalysis. Background technique [0002] Energy is an important resource for human survival and development. 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. By using semiconductor materials to absorb solar energy and convert solar energy into other non-polluting and renewable new energy sources, it is considered to be one of the main means to solve the human energy crisis. . [0003] As a new type of visible light responsive semiconductor photocatalytic material, silver phosphate is widely used in water treatment, photolys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18C01B3/04C01B13/02
CPCB01J27/18B01J35/004C01B3/042C01B13/0207C01B2203/0277C01B2203/1041C01B2203/1082Y02E60/36
Inventor 胡海华
Owner ZHEJIANG UNIV CITY COLLEGE
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