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

Carbon nano onion/titanium dioxide/silicon dioxide composite photocatalytic material as well as preparation method and application thereof

A technology of composite photocatalysis and titanium dioxide, applied in the field of photocatalytic materials, can solve the problems of short wavelength and low quantum efficiency, and achieve the effects of inhibiting separation, improving catalytic efficiency and high visible light catalytic activity

Active Publication Date: 2018-11-30
TAIYUAN UNIV OF TECH
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its practical application is affected by low quantum efficiency and wide bandgap (3.2eV for anatase, 3.0eV for rutile), which makes it easy to recombine photogenerated electrons and holes, so it can only use short wavelength and high energy. Disadvantages of UV light

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
  • Carbon nano onion/titanium dioxide/silicon dioxide composite photocatalytic material as well as preparation method and application thereof
  • Carbon nano onion/titanium dioxide/silicon dioxide composite photocatalytic material as well as preparation method and application thereof
  • Carbon nano onion/titanium dioxide/silicon dioxide composite photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A nano-onion carbon / titanium dioxide / silica (CNOs / TiO 2 / SiO 2 ) The concrete steps of the preparation method of catalyst are as follows:

[0036] (1) Purification of CNOs

[0037] Weigh 15g of CNOs and disperse in 750mL of nitric acid solution with a mass fraction of 68%, acid-dissolve and reflux at 80°C for 2h, wash the pickled product repeatedly with distilled water until the pH is neutral, dry at 80°C, and calcined at 400°C , grinding;

[0038] (2) CNOs / TiO 2 / SiO 2 preparation of

[0039]1) Mix 6 mL of titanium tetraisopropoxide and 3 mL of isopropanol solution and stir for 1 min, weigh 0.0192 g of pickled CNOs and add to the mixed solution and stir, transfer the mixed solution to the dropping funnel, add dropwise to the In a round bottom flask of 42mL distilled water, the dropping rate was controlled at 0.3mL / min, while stirring, and the condensation system was turned on;

[0040] 2) Add 1 mL of nitric acid solution dropwise to the mixed solution in step 1)...

Embodiment 2

[0052] (1) Purification of CNOs

[0053] Weigh 15g of CNOs and disperse in 750mL nitric acid solution with a mass fraction of 68%, acid reflux treatment at 80°C for 2h, wash the pickled product with distilled water repeatedly until the pH is neutral, dry at 80°C, and dry at 400°C calcined, ground;

[0054] (2) CNOs / TiO 2 / SiO 2 preparation

[0055] 1) Mix 6 mL of titanium tetraisopropoxide and 3 mL of isopropanol solution and stir for 1 min, weigh 0.0576 g of acid-washed CNOs into the mixed solution and stir, transfer the mixed solution to the dropping funnel, add dropwise to the In a round bottom flask of 42mL distilled water, the dropping rate was controlled at 0.3mL / min, while stirring, and the condensation system was turned on;

[0056] 2) Add 1mL of nitric acid solution to the mixed solution in step 1) dropwise, the dropping rate is controlled at 0.25mL / min, heated and stirred in a water bath at 70°C, after the reaction is completed, turn on the cooling water system t...

Embodiment 3

[0064] (1) Purification of CNOs

[0065] Weigh 15g of CNOs and disperse in 750mL nitric acid solution with a mass fraction of 68%, acid reflux treatment at 80°C for 2h, wash the pickled product with distilled water repeatedly until the pH is neutral, dry at 80°C, and dry at 400°C calcined, ground;

[0066] (2) CNOs / TiO 2 / SiO 2 preparation

[0067] 1) Mix 7mL titanium tetraisopropoxide and 3mL isopropanol solution and stir for 1min, weigh 0.0192g of pickled CNOs and add to the mixed solution and stir, transfer the mixed solution to the dropping funnel, add dropwise In a round bottom flask of 42mL distilled water, the dropping rate was controlled at 0.3mL / min, while stirring, and the condensation system was turned on;

[0068] 2) Add 1 mL of nitric acid solution dropwise to the mixed solution in step 1), the rate of addition is controlled at 0.25 mL / min, heated and stirred in a water bath at 70 °C, after the reaction is completed, the cooling water system is connected to co...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method and application of a carbon nano onion / titanium dioxide / silicon dioxide (CNOs / TiO2 / SiO2) composite photocatalytic material. The method uses titanium tetraisopropoxide (C12H28O4Ti) as a titanium source, purified carbon nano onions (CNOs) as a carbon source, and ethyl orthosilicate (C8H20O4Si) as a silicon precursor to prepare the CNOs / TiO2 / SiO2 compositephotocatalytic material through a sol-gel method. According to the method disclosed by the invention, active components of the photocatalytic material obtained by the method are not easy to fall offand have high stability; the obtained composite catalyst has a large specific surface area, and an obviously-improved adsorption effect on pollutants; introduction of the CNOs greatly inhibits TiO2 photogenerated electron-hole compounding, and improves catalytic activity; and the photocatalytic material effectively solves the two bottleneck difficult problems of a low quantum yield and a poor adsorption effect in a photocatalysis technology.

Description

technical field [0001] The invention relates to a nano-onion carbon / titanium dioxide / silicon dioxide composite photocatalytic material and a preparation method and application thereof, belonging to the field of photocatalytic materials. Background technique [0002] Water is the source of life, but with the continuous development of industry, the problem of water pollution is becoming more and more serious. Photocatalytic technology has the characteristics of simple operation, low energy consumption and no secondary pollution. Its development has brought a new development direction to the treatment of environmental pollutants. [0003] Among semiconductor photocatalysts, TiO2 has been widely studied for its high chemical stability, low cost, easy availability, non-toxicity and high photocatalytic efficiency. However, its practical application is affected by low quantum efficiency and wide bandgap (3.2eV for anatase, 3.0eV for rutile), which makes it easy to recombine photog...

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
IPC IPC(8): B01J21/18C02F1/30C02F101/38C02F101/36C02F101/34
CPCC02F1/30B01J21/18C02F2101/34C02F2101/36C02F2101/38B01J35/39
Inventor 张卫珂杨艳青贾佳王佳玮邓钏
Owner TAIYUAN UNIV OF TECH
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