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

Preparation method of nano-gold modified titanium dioxide-carbon nanotube composite photocatalyst

A carbon nanotube composite and titanium dioxide technology, which is applied in the field of air purification, can solve the problems of consumption of organic solvents and template agents, difficulty in controlling the combination of three components, secondary hazards to the ecological environment, etc., and achieve excellent adsorption rate and excellent catalytic degradation effect , the effect of close interface relationship

Active Publication Date: 2020-10-23
GUANGDONG UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, Au-TiO 2 The preparation process of -CNTs composite photocatalyst is relatively complicated, and the combination of the three components is difficult to control, and it is easy to affect the photocatalytic effect. At the same time, a large amount of toxic organic solvents and templates (such as J. , L.Lu, et al.J.Am.Chem.Soc.2007,129,9401; Y.X.Zhang, B.Gao, G.L.Puma, et al.Sci.Adv.Mater.2010,2,503), which will not only increase cost, and will cause secondary harm to the ecological environment

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
  • Preparation method of nano-gold modified titanium dioxide-carbon nanotube composite photocatalyst
  • Preparation method of nano-gold modified titanium dioxide-carbon nanotube composite photocatalyst
  • Preparation method of nano-gold modified titanium dioxide-carbon nanotube composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The invention provides a method for preparing a nano-gold modified titanium dioxide-carbon nanotube composite photocatalyst, comprising the following steps:

[0036] a) using an alcohol aqueous solution and a steady-state gas as a medium, and using a micro-nano bubble generator to obtain micro-nano bubble water;

[0037] b) mixing and dispersing the micronano bubble water, carbon nanotubes and titanium salt to obtain a dispersion;

[0038] c) mixing and hydrolyzing the dispersion with an aqueous ammonia solution to obtain a hydrolyzate;

[0039] d) After mixing the hydrolyzate with gold salt and micro-nano bubble water, sequentially carry out light reduction and heating reaction to obtain a reaction product;

[0040] e) heat-treating the reaction product to obtain Au-TiO 2 -CNTs composite photocatalyst.

[0041] In the present invention, micro-nano bubble water is used as a soft template, combined with the above-mentioned specific treatment process, titanium salt, go...

Embodiment 1

[0067] 1.1 Sample preparation

[0068] Using 8L of 11% ethanol aqueous solution and air as the medium, using a micro-nano bubble generator equipped with a high-pressure micro-nano nozzle for processing, the working pressure is 0.40MPa, and the air intake rate is 1.5L / min. After treatment, we get Micro-nano bubble water. Take 80mL of micro-nano bubble water and put it in a 250mL conical flask, according to the mass ratio MWCNTs:TiO 2 =26% Add 83.2mg of MWCNTs and 4mmol TiCl to the above-mentioned micro-nano bubble water successively 4 , Place the Erlenmeyer flask in a sonicator for ultrasonic treatment for 15 minutes to obtain a uniform dispersion. A dilute ammonia solution with a concentration of 2.6% was gradually added dropwise to the above dispersion liquid until a sol state appeared, and then the hydrolysis reaction was continued for 13 hours at a room temperature of 30° C. to obtain a hydrolyzed product. Add 0.018 mmol HAuCl to the resulting hydrolyzate 4 10 mL of mic...

Embodiment 2

[0075] 1.1 Sample preparation

[0076] With 8L of 11% ethanol aqueous solution and air as the medium, the micro-nano bubble generator equipped with high-pressure micro-nano nozzles is used for processing, the working pressure is 0.40MPa, and the air intake rate is 3L / min. Nano sparkling water. Take 80mL of micro-nano bubble water and put it in a 250mL conical flask, according to the mass ratio MWCNTs:TiO 2 =26% Add 83.2mg of MWCNTs and 4mmol TiCl to the above-mentioned micro-nano bubble water successively 4 , Place the Erlenmeyer flask in a sonicator for ultrasonic treatment for 15 minutes to obtain a uniform dispersion. A dilute ammonia solution with a concentration of 2.6% was gradually added dropwise to the above dispersion liquid until a sol state appeared, and then the hydrolysis reaction was continued for 13 hours at a room temperature of 30° C. to obtain a hydrolyzed product. Add 0.018 mmol HAuCl to the resulting hydrolyzate 4 10 mL of micro-nano-bubble aqueous solu...

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
purityaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a nanogold-modified titanium dioxide-carbon nanotube composite photocatalyst, which includes the following steps: using an alcohol aqueous solution and a stable gas as a medium, and processing with a micro-nano bubble generator to obtain micro-nano bubble water ; Mix and disperse the micro-nano bubble water, carbon nanotubes and titanium salt to obtain a dispersion; mix and hydrolyze the dispersion with an ammonia solution to obtain a hydrolyzate; d) mix the hydrolyzate with gold salt and micron After the nanobubble water is mixed, light reduction and heating reactions are performed sequentially to obtain the reaction product; the reaction product is heat treated to obtain Au-TiO 2 -CNTs composite photocatalyst. The preparation method provided by the invention is simple and easy to implement, which greatly simplifies the preparation process; and the composite photocatalyst produced is stable in combination and has effective and excellent catalytic degradation effect; at the same time, the preparation process does not require the use of toxic organic solvents and template agents, which greatly improves the efficiency of the preparation process. Reduce costs and harm to the environment.

Description

technical field [0001] The invention belongs to the technical field of air purification, in particular to a method for preparing a nano-gold modified titanium dioxide-carbon nanotube composite photocatalyst. Background technique [0002] At present, among air pollutants represented by typical volatile organic compounds (VOCs), many substances have carcinogenic and teratogenic effects, and a series of chronic diseases will occur after long-term exposure to the human body. Therefore, the effective control and elimination of typical VOCs has become one of the current research hotspots, especially the development of continuous, efficient and stable air purification technology, which is of great significance for energy saving and emission reduction, reducing the generation of toxic particulate matter, and effectively improving the living environment. [0003] Among them, photocatalytic oxidation technology can directly use visible light or sunlight to degrade VOCs under the actio...

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 Patents(China)
IPC IPC(8): B01J23/52B01D53/86B01D53/72
CPCB01D53/8668B01J23/52B01J35/39
Inventor 安太成张卫平刘宏利李桂英陈江耀
Owner GUANGDONG 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