Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for preparing sulfur-doped hypoxia type TiO2 photocatalyst

A photocatalyst and sulfur doping technology, applied in the field of photocatalytic materials

Active Publication Date: 2016-11-30
SHAANXI UNIV OF SCI & TECH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, few people have been found to be engaged in research in this area

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 sulfur-doped hypoxia type TiO2 photocatalyst
  • Method for preparing sulfur-doped hypoxia type TiO2 photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A kind of sulfur-doped oxygen-deficient TiO 2 The preparation method of photocatalyst comprises the following steps:

[0035] (1) According to the fixed ratio of molar ratio n(Ti):n(Si)=1:2, Ti(SO 4 ) 2 and Na 2 SiO 3 9H 2 The amount of O, and then according to the molar ratio n(TiO 2 ): n(TiS 2 )=1:(0.03~0.1) ratio to determine Na 2 The amount of S and Ti(SO 4 ) 2 Supplementary dosage, thus determined Ti(SO 4 ) 2 total usage. Then based on the total molar amount of Ti and the molar ratio n(Ti):n(SO 4 )=1:(0.02~0.06) to determine the doping (NH 4 ) 2 SO 4 the amount of introduction. Thereafter, the corresponding chemical reagents were weighed, and the Na 2 S, Ti(SO 4 ) 2 and (NH 4 ) 2 SO 4 dissolve into an aqueous solution;

[0036] (2) Na 2 SiO 3 9H 2 O Use deionized water to prepare an aqueous solution with a concentration of 0.60-0.65 mol / L, place it in a digitally controlled temperature-adjusted ultrasonic instrument, and first dissolve Ti(...

Embodiment 1

[0042] (1) According to the fixed ratio of molar ratio n(Ti):n(Si)=1:2, Ti(SO 4 ) 2 and Na 2 SiO 3 9H 2 The amount of O, and then according to the molar ratio n(TiO 2 ): n(TiS 2 ) = 1:0.06 ratio to determine Na 2 The amount of S and Ti(SO 4 ) 2 Supplementary dosage, thus determined Ti(SO 4 ) 2 total usage. Then based on the total molar amount of Ti and the molar ratio n(Ti):n(SO 4 )=1:0.04 to determine doping (NH 4 ) 2 SO 4 the amount of introduction. Thereafter, the corresponding chemical reagents were weighed, and the Na 2 S, Ti(SO 4 ) 2 and (NH 4 ) 2 SO 4 dissolve into an aqueous solution;

[0043] (2) Na 2 SiO 3 9H 2 O Use deionized water to prepare an aqueous solution with a concentration of 0.65 mol / L, place it in a digitally controlled temperature-adjusting ultrasonic instrument, and under the action of continuous stirring and ultrasonic waves at 50°C, Ti(SO 4 ) 2 Add the solution slowly, and continue adding Na slowly after 10 min 2 S solution...

Embodiment 2

[0050] (1) According to the fixed ratio of molar ratio n(Ti):n(Si)=1:2, Ti(SO 4 ) 2 and Na 2 SiO 3 9H 2 The amount of O, and then according to the molar ratio n(TiO 2 ): n(TiS 2 )=1:0.03 ratio to determine Na 2 The amount of S and Ti(SO 4 ) 2 Supplementary dosage, thus determined Ti(SO 4 ) 2 total usage. Then based on the total molar amount of Ti and the molar ratio n(Ti):n(SO 4 )=1:0.06 to determine doping (NH 4 ) 2 SO 4 the amount of introduction. Thereafter, the corresponding chemical reagents were weighed, and the Na 2 S, Ti(SO 4 ) 2 and (NH 4 ) 2 SO 4 dissolve into an aqueous solution;

[0051] (2) Na 2 SiO 3 9H 2 O Use deionized water to prepare an aqueous solution with a concentration of 0.60 mol / L, place it in a digitally controlled temperature-adjusted ultrasonic instrument, and firstly dissolve Ti(SO 4 ) 2 Add the solution slowly, and continue to add Na slowly after 5min 2 S solution. Continue ultrasonic stirring for 25 minutes to form a w...

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
decomposition temperatureaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a sulfur-doped hypoxia type TiO2 photocatalyst. Sodium silicate serves as a silicon source, titanium sulfate serves as a titanium source, sulfate radicals serve as a doped sulfur source, sodium sulfide serves as a reducing agent, first a silica gel immobilized TiO2 / TiS2 copolymer is prepared through an ultrasound copolymerization method, the mixing amount of the sulfate radicals is changed, a product precursor is synthesized by in-situ symbiosis at 140-160 DEG C, and finally a silica gel immobilized sulfur-doped hypoxia type TiO2 photocatalyst (S / hypoxia type TiO2) material is prepared through sintering at 650-800 DEG C under the protective atmosphere of N2. Obtained results indicate that the goals of O vacancy defect and S effective doping are achieved successfully, and good conditions are created for photocatalysis red shift of the TiO2 photocatalyst and efficient utilization of solar light. Besides, the product is high in purity and good in crystal condition.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a sulfur-doped oxygen-deficient TiO 2 Preparation method of photocatalyst. Background technique [0002] TiO 2 It is a semiconductor material with a variety of functional properties, and has always had important application value in the fields of chemical industry, electronics, energy, and environmental protection. Anatase TiO 2 It has non-toxic, high-efficiency photocatalytic performance, can effectively degrade organic pollutants in air and water, and is an ideal clean catalytic material for sewage treatment and air purification; similarly, TiO 2 As a semiconductor material, the photogenerated electron-hole effect can make CO 2 Photocatalytic conversion into renewable energy such as methanol and methane. Therefore, TiO 2 Photocatalytic materials play a very important role in the field of environmental protection and renewable energy. [0003] However, Ti...

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): B01J27/04B01J37/10
CPCB01J27/04B01J37/10B01J35/39
Inventor 张超武王夏云张利娜张楠王芬
Owner SHAANXI UNIV OF SCI & TECH
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
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