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

A large specific surface area-visible light-responsive tio 2 Catalyst and its preparation method

A technology with large specific surface area and specific surface area, which is applied in the field of photocatalysis, can solve the problems of low quantum efficiency, achieve good visible light photocatalytic performance, and improve the effect of visible light photocatalytic performance

Active Publication Date: 2017-09-15
FUZHOU UNIV
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to TiO 2 The forbidden band width is wide and can only be excited by ultraviolet light, while the energy of ultraviolet light in sunlight is less than 5% of the total energy, while visible light with lower energy accounts for most of the total energy, and the quantum efficiency is low

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
  • A large specific surface area-visible light-responsive tio <sub>2</sub> Catalyst and its preparation method
  • A large specific surface area-visible light-responsive tio <sub>2</sub> Catalyst and its preparation method
  • A large specific surface area-visible light-responsive tio <sub>2</sub> Catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A Large Specific Surface Area-Visible Light Responsive TiO 2 The preparation method of catalyst, concrete steps are:

[0026] (1) MIL-125(Ti)-NH 2 The preparation method is: weigh 2-aminoterephthalic acid (1.2 g) and disperse it in 36 mL N, N-dimethylformamide (DMF) and anhydrous methanol (4 mL), stir for 30 min until the solute is fully dissolved After dispersion, pipette tetrabutyl titanate (1.2 mL) into the reaction kettle, continue to stir for 30 min, put the kettle in an oven at 150 °C for 72 h, cool naturally, and wash with anhydrous methanol several times Exchange and wash, centrifuge, and dry the obtained sample in a vacuum oven at 60°C. The obtained yellow sample is MIL-125(Ti)-NH 2 ;

[0027] (2) With the synthesized MIL-125(Ti)-NH 2 As the precursor, weigh a certain amount of the precursor in the middle of the quartz tube of the tube furnace, and continue to pass nitrogen and oxygen, and calcined to a certain temperature to obtain N-doped TiO 2 ; By adju...

Embodiment 1

[0029] 1) Weigh 2-aminoterephthalic acid (1.2 g) and disperse it in N,N-dimethylformamide (DMF) (36 mL) and anhydrous methanol (4 mL), stir for 30 min until the solute is fully dissolved After dispersion, pipette tetrabutyl titanate (1.2mL) into the reaction kettle, continue to stir for 30 minutes, put the kettle in a 150°C oven for 72 hours, cool naturally, and wash with anhydrous methanol several times. Exchange and wash, centrifuge, and dry the obtained sample in a vacuum oven at 60°C. The obtained yellow sample is MIL-125(Ti)-NH 2 ;

[0030] 2) Place the obtained sample in the middle of the quartz tube of the tube furnace for calcination, continuously pass nitrogen and oxygen, the nitrogen flow rate is 50ml / min, the oxygen flow rate is 5 ml / min, the calcination temperature is 500°C, and the heating rate is 1°C per minute , the constant temperature holding time is 3 hours, and the calcined product is cooled with the furnace at a cooling rate of 3°C per minute, and cooled t...

Embodiment 2

[0032] 1) Weigh 2-aminoterephthalic acid (1.2 g) and disperse it in DMF (36 mL) and anhydrous methanol (4 mL), stir for 30 min until the solute is fully dissolved and dispersed, then pipette the titanium Tetrabutyl ester (1.2 mL) was added to the reaction kettle, and continued to stir for 30 min. After loading the kettle, it was placed in an oven at 150 °C for 72 h, cooled naturally, washed with anhydrous methanol several times, centrifuged, and the obtained sample was placed in Drying in a vacuum oven at 60°C, the resulting yellow sample is MIL-125(Ti)-NH 2 ;

[0033]2) Place the obtained sample in the middle of the quartz tube of the tube furnace for calcination, continuously pass nitrogen and oxygen, the nitrogen flow rate is 50ml / min, the oxygen flow rate is 10 ml / min, the calcination temperature is 550°C, and the heating rate is 1°C per minute , the constant temperature holding time is 3 hours, and the calcined product is cooled with the furnace at a cooling rate of 3°C ...

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
Login to View More

Abstract

The invention provides a TiO2 catalyst with a large specific surface area and a visible-light response function and a method for preparing the TiO2 catalyst, and belongs to the technical field of photocatalysis. Ti-MOF (MIL-125 (Ti)-NH2) which is used as a self-template is sintered and synthesized in atmosphere of oxygen and hydrogen with a certain proportion (of oxygen to hydrogen of 1:5-1:10) to obtain the catalyst which is a TiO2 polyhedron with auto-doped N and a large specific surface area. The TiO2 catalyst and the method have the advantages that morphology of MOF can be effectively copied by the aid of the template method, and the specific surface area of TiO2 can be greatly increased by microporous structures and can reach 262.3 m<2> / g; MOF ligands are regulated and controlled, N, F and S elements are doped in the TiO2, and accordingly the visible-light photocatalyst performance of the TiO2 can be improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis in the energy environment, and in particular relates to a large specific surface area-visible light response TiO 2 Catalyst and method for its preparation. Background technique [0002] Environmental and energy issues are two major issues restricting the development of today's society. Semiconductor photocatalysis technology uses solar energy as the driving force of the reaction to effectively reduce energy consumption, and because of its mild reaction conditions and no secondary pollution, it has become the solution to these two issues. Ideal way. The core of photocatalytic technology lies in photocatalyst. Among various materials, nano-TiO 2 Due to its low cost, non-toxicity, high stability, good catalytic performance and recyclable utilization, it has attracted widespread attention. But since TiO 2 The forbidden band width is wide and can only be excited by ultraviolet light, while ...

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): B01J27/24B01J35/10C02F1/30C02F1/58C01B3/04
CPCY02E60/36
Inventor 吴棱黄林娟沈丽娟秦娜熊锦华
Owner FUZHOU UNIV
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