Preparation method of noble metal/graphene composite titanium dioxide photocatalyst and application of noble metal/graphene composite titanium dioxide photocatalyst in air purification

A graphene composite and titanium dioxide technology, applied in the field of photocatalysis, can solve the problems of unsatisfactory photocatalytic efficiency of pollutants, complicated operation, photocatalyst photogenerated electrons, high hole recombination rate, etc., to achieve strong photodegradation of pollutants ability, high photocatalytic efficiency

Pending Publication Date: 2020-05-08
厦门十日甫智能科技合伙企业(有限合伙) +1
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Titanium dioxide as a photocatalyst, its catalytic efficiency needs to be improved, the main reasons are: 1. Titanium dioxide has a wide band gap of light energy, 3.2V, and the absorption threshold of the spectrum is 387nm, which can only use the ultraviolet part of the solar spectrum ; 2. The photogenerated electron and hole recombination rate of titanium dioxide photocatalyst is high, so the quantum efficiency is low
[0010] However, the existing method of simultaneously doping graphene and noble metals on titanium dioxide is complicated to operate, and the photocatalytic efficiency and ability to degrade pollutants in the air of the prepared titanium dioxide photocatalyst are not very ideal.

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 noble metal/graphene composite titanium dioxide photocatalyst and application of noble metal/graphene composite titanium dioxide photocatalyst in air purification
  • Preparation method of noble metal/graphene composite titanium dioxide photocatalyst and application of noble metal/graphene composite titanium dioxide photocatalyst in air purification
  • Preparation method of noble metal/graphene composite titanium dioxide photocatalyst and application of noble metal/graphene composite titanium dioxide photocatalyst in air purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 25mg cetyltrimethylammonium bromide to 250mL water

[0035] (2) Add 2mL of 0.1mol / L HAuCl 4 .4H 2 O aqueous solution.

[0036] (3) Add 1.8 mL of 0.5 mol / L KOH solution to adjust the pH value to 8.

[0037] (4) Add 10 g of Degussa P25 under vigorous stirring, and continue stirring for one hour.

[0038] (5) Add 192 mg of potassium tartrate and continue stirring for one hour.

[0039] (6) Buchner funnel to filter, collect the powder, redisperse the powder in water, stir for 10 minutes, then filter to collect the powder, repeat the operation 3-4 times.

[0040] (7) The obtained solid powder was dried in an oven at 80° C. for 4 hours.

[0041] (8) Take 5 g of the solid powder prepared in (7) and 25 mg of graphene oxide powder, and dissolve them in 480 mL of water and 240 mL of ethanol. Stir vigorously for 30 min.

[0042] (9) Pour the reaction solution into a hydrothermal kettle and heat at 120°C for 24 hours.

[0043] (10) Remove the reaction liquid by filtra...

Embodiment 2

[0045] (1) Add 5 mg of sodium dodecylbenzenesulfonate to 100 mL of water.

[0046] (2) Add 1mL of 0.05mol / L HAuCl 4 .4H 2 O aqueous solution.

[0047] (3) Add 1 mL of 0.5 mol / L NaOH solution to adjust the pH value to 9.5.

[0048] (4) Add 10 g of anatase titanium dioxide under vigorous stirring, and continue stirring for one hour.

[0049] (5) Add 325 mg of ascorbic acid and continue stirring for three hours.

[0050] (6) Buchner funnel to filter, collect the powder, redisperse the powder in water, stir for 10 minutes, filter and collect the powder, repeat the operation 3-4 times.

[0051] (7) The obtained solid powder was dried in a 40°C drying oven for 12 hours.

[0052] (8) Take 15 g of the solid powder prepared in (7) and 50 mg of graphene oxide powder, and dissolve them in 1440 mL of water and 720 mL of ethanol. Stir vigorously for 30 min.

[0053] (9) Pour the reaction solution into a hydrothermal kettle and heat at 180°C for 15 hours.

[0054] (10) Remove the re...

Embodiment 3

[0056] (1) Add 50mg sodium polyacrylate to 100mL water

[0057] (2) Add 1mL of 0.1mol / L Na 2 PdCl 4 aqueous solution.

[0058] (3) Add 0.1 mL of 0.1 mol / L sodium hydroxide to adjust the pH of the solution to 8.

[0059] (4) Add 10 g of Degussa P25 under vigorous stirring, and continue stirring for two hours.

[0060] (5) Add 40 mg of citric acid and continue to stir for two hours.

[0061] (6) Put the solution into a centrifuge and centrifuge at 5000r / min for 15min, pour off the supernatant, redisperse the obtained solid in water and stir for 10min, repeat the above steps. The finally obtained solid powder was dried in an oven at 40° C. for 12 hours.

[0062] (7) Take 0.6 g of the solid powder prepared in (6) and 30 mg of graphene oxide powder, dissolve them in a mixture of 60 mL of water and 30 mL of ethanol and stir vigorously for 30 min.

[0063] (8) Pour the mixed solution into a hydrothermal kettle and heat at 180° C. for 5 hours.

[0064] (9) Remove the reaction l...

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
breaking strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a preparation method of a noble metal / graphene composite titanium dioxide photocatalyst. The preparation method is characterized by comprising the following steps: S1, sequentially adding a surfactant and a noble metal salt or noble metal acid solution into a solvent, uniformly stirring, adjusting the pH value to 7.0-10.0, adding titanium dioxide powder and a reducing agent,reacting at room temperature for 1-4 h, and separating out a solid A; and S2, adding the solid A prepared in step S1 and graphene oxide powder into an ethanol-water solution, and carrying out a hydrothermal reaction to obtain the noble metal / graphene composite titanium dioxide. The photocatalytic efficiency of the photocatalyst is high.

Description

technical field [0001] The invention relates to the preparation of a noble metal / graphene composite titanium dioxide photocatalyst and its application in air purification, belonging to the technical field of photocatalysis. Background technique [0002] With the popularization of interior decoration, the pollution of building materials to the indoor environment comes with it. Ordinary people pay more and more attention to the quality of air in their homes and public places. In the document "Indoor Air Quality Standard" GBT 1882-2002, there are relevant regulations on the upper limit of indoor concentrations of various organic substances. At present, there are many kinds of air purification products on the market, with mixed results and uneven effects. [0003] Generally, the release of organic pollutant gases from building materials is a long-term process. Many air purification products only undergo a one-time chemical reaction with pollutant gases, so they cannot maintain ...

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): B01J23/52B01J23/44B01J23/42B01J21/06B01J37/10B01D53/86B01D53/44
CPCB01J23/52B01J23/44B01J23/42B01J21/063B01J37/10B01D53/8687B01D53/44B01D2258/06B01J35/39
Inventor 李燕群张礴江波袁赛赛洪文晶
Owner 厦门十日甫智能科技合伙企业(有限合伙)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap