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

Method for preparing visible light efficient multifunctional photocatalyst

A technology with visible light and catalytic activity, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems such as application limitations

Active Publication Date: 2007-03-28
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to TiO 2 It can only absorb ultraviolet light with a wavelength of ≤400nm, and its application is greatly limited

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 visible light efficient multifunctional photocatalyst
  • Method for preparing visible light efficient multifunctional photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The technical features and advantages of the present invention can be seen from the embodiments and application examples given below.

[0012] 1. AgBr / TiO 2 Optical absorption properties and stability of catalysts

[0013] Add 1 g of P25 powder to 100 ml of deionized water, sonicate for 30 minutes, then add 1.2 g of cetyltrimethylammonium bromide (CTAB) to the suspension, stir at room temperature for 30 minutes, and then add 0.21 g of AgNO 3 and 2.3mlNH 4 OH (25wt% NH 3 ) prepared [Ag(NH) 3 ) 2 ] + solution. The resulting system was stirred at room temperature for 12 hours, then the samples were centrifuged and dried at 70°C. Finally, the obtained powder was calcined at 500 °C for 3 hours to obtain AgBr / TiO 2 Catalyst, the obtained sample was analyzed by UV-Vis diffuse reflection and X-ray diffraction, and the obtained results are shown in the figure.

[0014] Figure 1 shows that the absorption band boundary of P25 is around 400 nm, while that of AgBr / TiO 2 Th...

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 present invention relates to a preparation method of AgBr / TiO2 system with high-effective visible light photocatalytic activity. Said method includes the following steps: adding commercially-available Degussa P25 into deionized water, ultrasonic treatment for 20-50 min, then adding cetyl trimethyl ammonium bromide (CTAB) into the suspension, stirring them for 30 min at room temperature, then adding [Ag(NH3)2]+ solution, making Ag content in AgBr / TiO2 be 5-15 wt%, the mole ratio value of CTAB and Ag+ be 2-4, stirring obtained system at room temperature, making centrifugal separation of sample, dring at 70deg.C, calcining the obtained powder body at 450-650deg.C so as to obtain the invented AgBr / TiO2 sample.

Description

technical field [0001] The invention relates to a preparation method of a visible light catalyst, in particular to a preparation method of a composite catalytic system in which silver bromide is supported on the surface of titanium dioxide. Background technique: [0002] As an emerging water treatment technology, heterogeneous photocatalysis has been extensively studied. Titanium dioxide is valued for its highest catalytic activity and stability. However, due to TiO 2 It can only absorb ultraviolet light with a wavelength of ≤400nm, and its application is greatly limited. Recently, Calzafeeri et al. reported that under ultraviolet and visible light, when silver ions are present in the system, the electrodes and SnO coated with silver chloride 2 Experiment on photocatalytic oxidation of water with a thin layer of silver chloride on the coating. Noriyoshi et al. supported silver bromide on silica and studied its activity and stability under ultraviolet light. Roderigues e...

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): B01J27/08B01J21/06B01J37/02
Inventor 胡春兰永清
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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