Core-shell structure titanium sub-oxide and controllable preparation method thereof

A technology of titanium oxide and core-shell structure, applied in the field of material science, to achieve the effects of excellent thermal stability, uniform reaction, and ultra-high electrical conductivity

Active Publication Date: 2017-07-25
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Is it possible to achieve the preparation of titania and its surface structure regulation under low temperature conditions, so that it has excellent electrocatalytic performance? At present, there are no l

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
  • Core-shell structure titanium sub-oxide and controllable preparation method thereof
  • Core-shell structure titanium sub-oxide and controllable preparation method thereof
  • Core-shell structure titanium sub-oxide and controllable preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The invention provides a titanium oxide with a core-shell structure coated with an amorphous layer on the surface and a method for preparing the pure phase of the titanium oxide under low temperature conditions with low cost and controllable control. The reduction of titanium dioxide by an active metal enables the controllable preparation of titanium dioxide at a relatively low temperature (550°C). The TiO prepared under this low-temperature condition has a unique core-shell structure covered by an amorphous layer on the surface, and has excellent electrocatalytic oxygen reduction performance.

[0032] In the present invention, as long as titanium dioxide can be transformed into a rutile phase by a suitable method, the microscopic morphology of titanium dioxide (rutile titanium dioxide) includes but is not limited to various shapes such as balls, rods, strips, tubes and irregular polygons.

[0033] In the present invention, the particle diameter of titanium dioxide may ...

Embodiment 1

[0060] (1) Titanium dioxide is used as a precursor, and metal magnesium is used as a reducing agent, wherein, in terms of molar percentage, metal magnesium: TiO 2 =55% weighed and ground and mixed in a mortar;

[0061] (2) Add the uniformly mixed powder into a quartz tube with an open end, connect a vacuum pump to make the vacuum less than 1 Pa, and then use a hydrogen-oxygen flame gun to melt and seal the open end of the quartz tube;

[0062] (3) Place the vacuum-tight quartz tube in a muffle furnace, raise the temperature from 30°C to 450°C at a rate of 1°C / min, keep it warm for 6 hours, and then rise from 450°C to 550°C at a rate of 1°C / min ℃, keep warm for 6 hours and then cool with the furnace;

[0063] (4) Open the vacuum-tight quartz tube, mix the gained black powder with water and stir for 6 hours, remove part of the incompletely reacted metal;

[0064](5) Suction filter the stirred solution, add 1M dilute hydrochloric acid, mix and stir for 6 hours, add deionized wa...

Embodiment 2

[0066] (1) Titanium dioxide is used as a precursor, and metal magnesium is used as a reducing agent, wherein, in terms of molar percentage, metal magnesium: TiO 2 =105% weighed and ground in a mortar and mixed evenly;

[0067] (2) Add the uniformly mixed powder into a quartz tube with an open end, connect a vacuum pump to make the vacuum less than 1 Pa, and then use a hydrogen-oxygen flame gun to melt and seal the open end of the quartz tube;

[0068] (3) Place the vacuum-tight quartz tube in a muffle furnace, raise the temperature from 30°C to 450°C at a rate of 1°C / min, keep it warm for 6 hours, and then rise from 450°C to 550°C at a rate of 1°C / min ℃, keep warm for 6 hours and then cool with the furnace;

[0069] (4) Open the vacuum-tight quartz tube, mix the gained black powder with water and stir for 6 hours, remove part of the incompletely reacted metal;

[0070] (5) Suction filter the stirred solution, add 1M dilute hydrochloric acid, mix and stir for 6 hours, add dei...

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
Particle sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to core-shell structure titanium sub-oxide and a controllable preparation method thereof. The titanium sub-dioxide has a core shell structure, and the surface is coated with an amorphous titanium sub-oxide layer. The titanium sub-dioxide has the special core shell structure, and the surface of the special core shell structure is coated with an amorphous titanium sub-oxide layer, so that the core-shell structure titanium sub-oxide has unique electrical and optical properties of the titanium sub-oxide, excellent thermal stability and super-high conductivity, also has small particle size, high specific surface area, controllable micro structure units and other good performances, and can be used for catalysts and catalyst carriers, high conductive materials and preparation of effective rechargeable batteries and the like.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to titanium dioxide with a surface amorphous layer covering a core-shell structure and a controllable preparation method thereof. Background technique [0002] Titanium oxide is a general term for a series of non-stoichiometric titanium oxides (Ti n o 2n-1 ), has many advantages such as high electrical conductivity (conductivity 1500S / cm, much higher than graphite material), high chemical stability (resistant to strong acid and strong alkali) and electrochemical stability (stable voltage window in aqueous solution is above 3.0V). It has good application prospects in the fields of catalyst / catalyst carrier, fuel cell, liquid flow battery and so on. [0003] In 1959, Magnéli first studied the crystal structure of this kind of substance, so titanium suboxide is also called Magnéli phase titanium oxide. Titanium oxide has a crystal structure based on rutile titan...

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): C01G23/04B01J21/06
CPCB01J21/063B01J35/0033B01J35/008C01G23/043C01P2002/72C01P2002/77C01P2004/03C01P2004/04C01P2004/30C01P2004/61C01P2004/62C01P2004/64C01P2006/40
Inventor 黄富强徐吉健
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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