Supercharge Your Innovation With Domain-Expert AI Agents!

Method for preparing titanium oxide photocatalyst

A technology of photocatalyst and titanium oxide, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as insufficient catalytic activity

Inactive Publication Date: 2015-04-29
SINOPHARM CHEM REAGENT
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a method for preparing a titanium oxide photocatalyst with high catalytic activity and low cost, so as to overcome the insufficient catalytic activity of the photocatalyst under visible 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
  • Method for preparing titanium oxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Dissolve 12g of titanium tetrachloride in 300g of pure water, add 9.7g of thiourea, heat up to 60°C under stirring, add 10wt% ammonia water continuously to keep the reaction system at pH=7.4, control the temperature and pH value to react After cooling down for 1 hour, suction filtration, the obtained solid phase was washed with pure water for 0.5 hours under stirring, and the solid phase obtained by suction filtration was dried at a temperature of 50°C in a spray dryer, and then placed in a sintering furnace, at 400 °C for 3 hours in vacuum, the resulting solid was ground in a ball mill, washed with pure water, and dried at 50 °C to obtain a titanium oxide photocatalyst. The sulfur content of the titanium oxide photocatalyst was determined The amount is 0.25wt%, the proportion of rutile type and anatase type is 10%, and the specific surface area is 180m 2 / g. The decomposition ability of isopropanol (IPA) and the decomposition ability of methylene blue (MB) are listed ...

Embodiment 2

[0050] Dissolve 20g of titanium tetrachloride in 300g of pure water, add 10.0g of dimethylthiourea, heat up to 50°C under stirring, add 30wt% ammonia water continuously to keep the reaction system at pH=7.8, control the temperature and The pH value was reacted for 2 hours, and suction filtered after cooling down. The obtained solid phase was washed with pure water for 1 hour under stirring, and the solid phase obtained by suction filtration was dried at a temperature of 60°C in a spray dryer, and then it was Put it in a sintering furnace, and roast it under vacuum at 450°C for 5 hours, put the obtained solid into a ball mill for grinding, wash it with pure water, and dry it at 60°C to obtain a titanium oxide photocatalyst. The sulfur content is 0.05wt%, the ratio of rutile and anatase is 60%, and the specific surface area is 170m 2 / g.

Embodiment 3

[0052] Dissolve 10g of titanium tetrachloride in 300g of pure water, add 9.7g of thiourea, heat up to 40°C under stirring, add 10wt% ammonia water continuously to keep the reaction system at pH=7.2, control the temperature and pH value to react After cooling down for 1 hour, suction filtration, the obtained solid phase was washed with pure water for 1 hour under stirring, and the solid phase obtained by suction filtration was dried at a temperature of 70°C in a spray dryer, and then placed in a sintering In the furnace, at a temperature of 600°C, air with a volume content of 2% hydrogen was fired for 4 hours, and the obtained solid was ground in a ball mill, washed with pure water, and dried at 70°C to obtain titanium oxide light. Catalyst, the sulfur content of the titanium oxide photocatalyst is determined to be 0.18wt%, the ratio of rutile type and anatase type is 10%, and the specific surface area is 150m 2 / g.

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a titanium oxide photocatalyst. The method comprises the following steps: by taking titanium tetrachloride and a sulfur-containing compound as raw materials, reacting with the sulfur-containing compound in high purity water, performing suction filtration on the obtained solid phase, washing, performing suction filtration again, drying the obtained solid-phase material in a spray dryer, roasting in a sintering furnace, grinding the obtained solids in a ball mill, washing by using pure water, and drying, thereby obtaining the titanium oxide photocatalyst. According to the added sulfur-containing compound, the sulfur atoms serving as positive ions are coated in titanium oxide, or adsorbed to the surface of titanium oxide particles, or dispersed on the grain boundary of titanium oxide, so that titanium oxide has high catalytic activity in a visible range. The titanium oxide photocatalyst prepared by the preparation method disclosed by the invention has the purity of 99.5 percent, reflects photocatalytic performance under visible light, has high catalytic activity and is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of titanium oxide photocatalyst. Background technique [0002] Titanium oxide has been used as a white pigment for a long time. Titanium oxide powder is widely used as an ultraviolet shielding material for cosmetics and similar purposes, as a material for forming photocatalysts, capacitors or thermistors, and as a sintered material in electronic materials, such as barium titanate. [0003] In recent years, the application of titanium dioxide to photocatalysts has been actively tried. When irradiated with light having an energy higher than its band gap, titanium oxide is activated, and electrons are generated in the conduction band, holes are generated in the valence band, and the reduction of electrons is used. The application of photocatalysts with the ability and positive charge oxidation ability is widely used. [0004] Titanium oxide photocatalysts have various applications in the prior art. The deve...

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): B01J21/06
Inventor 曹丽丽雷晓青顾金凤陆莉峻倪传宏
Owner SINOPHARM CHEM REAGENT
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com