Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Silver phosphate/titanium dioxide nanocomposite and preparation method thereof

A nano-composite material, titanium dioxide technology, applied in the field of nano-composite material and its preparation

Inactive Publication Date: 2015-03-04
ZHEJIANG SCI-TECH UNIV
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide band gap (about 3.3 eV) of titanium dioxide photocatalytic materials, its photoresponse range is mainly concentrated in the ultraviolet region, and the proportion of effective use of solar energy is low (only about 5%), and there are Therefore, it is necessary to develop a new type of semiconductor photocatalytic material with high efficiency and visible light response characteristics.
[0004] In recent years, silver phosphate has received extensive attention as a new type of photocatalyst with high efficiency and visible light response, but the common silver phosphate will be photoreduced under visible light irradiation Or decompose into silver elemental particles to affect its stability, which limits its industrial application to a certain extent

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silver phosphate/titanium dioxide nanocomposite and preparation method thereof
  • Silver phosphate/titanium dioxide nanocomposite and preparation method thereof
  • Silver phosphate/titanium dioxide nanocomposite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Add 0.684 g PVP to 6 mL DMF solvent, add 1 mL acetic acid and 1 g butyl titanate, and stir magnetically for 12 h to obtain spinning solution. The above solution was put into a syringe for electrospinning, the flow rate of the solution was set at 0.6 mL / h, the collection distance was 14 cm, and the voltage was 15 kV. The fiber film collected on the receiving plate was put into a muffle furnace for sintering, and the temperature was raised to 500 °C at a rate of 1 °C / min, then kept for 3 h, and cooled to obtain titanium dioxide nanofibers;

[0032] 2) Take 0.08 g of titanium dioxide nanofibers obtained in step 1) and ultrasonically disperse them in 50 mL of deionized water; take 3 mmol of silver nitrate and dissolve them in the above dispersion liquid, and mix for 2 h under the condition of avoiding light and stirring;

[0033] 3) Dissolve 1 mmol of sodium dihydrogen phosphate in 50 mL of deionized water, add it dropwise to the solution obtained in step 2) under the co...

Embodiment 2

[0038] 1) Add 0.684 g PVP to 6 mL DMF solvent, add 1.5 mL acetic acid and 1.368 g butyl titanate, and stir magnetically for 15 h to obtain spinning solution. The above solution was put into a syringe for electrospinning, the flow rate of the solution was set at 0.8 mL / h, the collection distance was 20 cm, and the voltage was 18 kV. Put the fiber film collected on the receiving plate into a muffle furnace for sintering, raise the temperature to 550 °C at a rate of 2 °C / min, keep it for 2 h, and cool to obtain titanium dioxide nanofibers;

[0039]2) Take 0.2 g of titanium dioxide nanofibers obtained in step 1) and ultrasonically disperse them in 80 mL of deionized water; take 1.5 mmol of silver acetate and dissolve them in the above dispersion, and mix for 1 h under the condition of avoiding light and stirring;

[0040] 3) Dissolve 0.5 mmol of potassium dihydrogen phosphate in 50 mL of deionized water, add it dropwise to the solution obtained in step 2) under the condition of av...

Embodiment 3

[0042] 1) Add 0.684 g of PVP to 6 mL of DMF solvent, add 0.9 mL of dilute hydrochloric acid and 0.684 g of butyl titanate, and stir magnetically for 10 h to obtain a spinning solution. The above solution was put into a syringe for electrospinning, the flow rate of the solution was set at 0.5 mL / h, the collection distance was 10 cm, and the voltage was 10 kV. Put the fiber film collected on the receiving plate into a muffle furnace for sintering, raise the temperature to 450°C at a rate of 1.5°C / min, keep it warm for 3 hours, and cool to obtain titanium dioxide nanofibers;

[0043] 2) Take 0.05 g of titanium dioxide obtained in step 1) and ultrasonically disperse it in 100 mL of deionized water; add the silver nitrate ammonium solution containing 3 mmol of silver ammonium ions to the above dispersion, and mix for 1 h under the condition of avoiding light and stirring;

[0044] 3) Dissolve 1 mmol of sodium dihydrogen phosphate in 2 ml of deionized water, add it dropwise to the s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a silver phosphate / titanium dioxide nanocomposite. The silver phosphate / titanium dioxide nanocomposite is formed by silver phosphate nanoparticles and titanium dioxide nanofibers according to a mole ratio of (0.2-2) to 1, wherein the silver phosphate nanoparticles are loaded on the surfaces of the titanium dioxide nanofibers to form heterojunctions. A preparation method of the silver phosphate / titanium dioxide nanocomposite comprises the following steps: (1) preparing a spinning solution from butyl titanate, polyvinylpyrrolidone, dimethylformamide and an acid solution, and preparing titanium dioxide nanofibers by an electrostatic spinning manner; (2) dispersing the titanium dioxide nanofibers in deionized water, adding silver salt, and stirring without light; (3) preparing a dihydric phosphate solution, dropwise adding the dihydric phosphate solution into the solution prepared by the step (2) by magnetically stirring without light, and reacting to obtain the silver phosphate / titanium dioxide nanocomposite. The composite has double functions and are relatively high in catalytic activity in an ultraviolet light area and a visible light area. The method is simple and liable to operate, high in repeatability, mild in synthesis condition and low in cost, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to a nanocomposite material and a preparation method thereof, in particular to a silver phosphate / titanium dioxide nanocomposite material and a preparation method thereof. Background technique [0002] With the development of the economy, the problem of environmental pollution is becoming more and more serious, and has seriously threatened the survival and development of human beings. Therefore, it is more and more urgent to research and develop new and efficient green environmental protection materials to control environmental pollution. Semiconductor photocatalytic materials are a new class of materials that use sunlight to catalyze oxidation to degrade pollutants in the atmosphere or water. They have the characteristics of high efficiency, environmental protection, and low cost, and have attracted much attention in recent years. [0003] Titanium dioxide has the outstanding advantages of strong photocatalytic ability, chemical ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18C02F1/30C02F1/32C02F103/30
CPCY02W10/37
Inventor 杨叶锋谢金磊熊杰
Owner ZHEJIANG SCI-TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com