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

Preparation method for double-rare earth element lanthanum and gadolinium codoped titanium dioxide nanotube

A technology of titanium dioxide and nanotubes, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as low photocatalytic quantum efficiency, low solar energy utilization rate, and narrow adsorption range. Achieve the effects of simple preparation process, convenient and simple product treatment, and low cost

Inactive Publication Date: 2013-05-01
SHANGHAI NAT ENG RES CENT FORNANOTECH
View PDF1 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide (TiO 2 ) Photocatalysts have encountered the following bottlenecks in industrial applications: first, electron-hole pairs are easy to recombine, and the photocatalytic quantum efficiency is low; Ultraviolet rays with energy greater than or equal to its forbidden band width can excite TiO 2 Produces photocatalytic and photochemical reactions, while ultraviolet rays only account for about 3% to 5% of the sun's natural light radiation, and the utilization rate of solar energy is low
In recent years, the research on the doping modification of titanium dioxide by rare earth elements has also made key progress, but there is still a lot of research space, especially the double rare earth element modified TiO2. 2 Nanotubes have been poorly studied

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
  • Preparation method for double-rare earth element lanthanum and gadolinium codoped titanium dioxide nanotube
  • Preparation method for double-rare earth element lanthanum and gadolinium codoped titanium dioxide nanotube
  • Preparation method for double-rare earth element lanthanum and gadolinium codoped titanium dioxide nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present invention adopts impregnation-co-precipitation method to prepare double rare earth-doped titanium dioxide nanotube composite material, and the method comprises the following steps:

[0030] (1) TiO 2 Preparation of nanotubes: Preparation of TiO by a strong alkali-hydrothermal method 2 nanotube;

[0031] (2) configure lanthanum nitrate and gadolinium nitrate aqueous solution (0.001M);

[0032] (3) During the stirring process, weigh a certain amount of TiO 2 Nanotube (0.01M) in the solution of step (2); Continue stirring for 16h;

[0033] (4) the product is suction filtered and washed (removing surface-adsorbed La 3+ and Gd 3+ ), the resulting product was dried in a constant temperature oven at 80°C for 10 h, and ground into powder to obtain La and Gd co-doped TiO 2 nanotube composites.

[0034] The product obtained in step (4) is characterized by TEM and XRD for its structure and crystal form respectively, figure 1 , 2 TiO prepared by strong alkali m...

Embodiment 2

[0036] The present invention adopts impregnation-co-precipitation method to prepare double rare earth-doped titanium dioxide nanotube composite material, and the method comprises the following steps:

[0037] (5)TiO 2 Preparation of nanotubes: Preparation of TiO by a strong alkali-hydrothermal method 2 nanotube;

[0038] (6) configure lanthanum nitrate and gadolinium nitrate aqueous solution (0.001M);

[0039] (7) During the stirring process, weigh a certain amount of TiO 2 Nanotube (0.01M) in the solution of step (2); Continue stirring for 16h;

[0040] (8) Suction filtration of the product, washing (removing surface-adsorbed La 3+ and Gd 3+ ), the resulting product was dried in a constant temperature oven at 80 °C for 10 h, ground into powder, and finally placed in a muffle furnace for calcination at 300 °C to obtain La and Gd co-doped TiO 2 nanotube composites.

Embodiment 3

[0042] The present invention adopts impregnation-co-precipitation method to prepare double rare earth-doped titanium dioxide nanotube composite material, and the method comprises the following steps:

[0043] (1) TiO 2 Preparation of nanotubes: Preparation of TiO by a strong alkali-hydrothermal method 2 nanotube;

[0044] (2) configure lanthanum nitrate and gadolinium nitrate aqueous solution (0.001M);

[0045] (3) During the stirring process, weigh a certain amount of TiO 2 Nanotube (0.01M) in the solution of step (2); Continue stirring for 16h;

[0046] (4) the product is suction filtered and washed (removing surface-adsorbed La 3+ and Gd 3+ ), the resulting product was dried in a constant temperature oven at 80 °C for 10 h, ground into powder, and finally placed in a muffle furnace for calcination at 400 °C to obtain La and Gd co-doped TiO 2 nanotube composites.

[0047] The product obtained in step (4) is characterized by TEM, as Figure 5 As shown, it can be seen ...

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 invention brings forward a preparation method for a double-rare earth element lanthanum and gadolinium codoped titanium dioxide nanotube. The method is characterized by comprising the following steps: preparing a titanium dioxide nanotube by using a strong base-hydrothermal treatment combined method; preparing a mixed solution of lanthanum nitrate and gadolinium nitrate; adding the titanium dioxide nanotube into the solution prepared in step (2) during stirring; continuing stirring for a period of time; and carrying out pumping filtration and washing on an obtained product, drying the product in a drying box at a constant temperature of 80 DEG C for 10 h, grinding the product into powder and sintering the powder in a muffle furnace at a certain temperature so as to obtain the lanthanum and gadolinium codoped titanium dioxide nanotube composite. With the preparation method, a plurality of rare earth ions can be successfully loaded on the surface of and in the titanium dioxide nanotube, the rare earth ions have high dispersibility in the titanium dioxide nanotube, and the product has stable properties; the preparation method has easy and convenient process and flow and allows the product to maintain a tubular structure after sintering.

Description

technical field [0001] The invention belongs to the technical field of nano-titanium dioxide modification, and in particular relates to a method for preparing a double rare earth material lanthanum and gadolinium co-doped titanium dioxide nanotube composite material. Background technique [0002] Due to its low price and fast electron-hole separation, titanium dioxide has become a photocatalyst, photoanode material for solar cells, etc. Titanium dioxide (TiO 2 ) photocatalysts encountered the following bottlenecks in industrial applications: first, electron-hole pairs are easy to recombine, and the photocatalytic quantum efficiency is low; Ultraviolet rays with energy greater than or equal to its forbidden band width can excite TiO 2 Photocatalysis and photochemical reactions are produced, and ultraviolet rays only account for about 3% to 5% of the sun's natural light radiation, and the utilization rate of solar energy is low. Therefore, various approaches have been used ...

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): B01J23/10B01J21/06B82Y30/00
Inventor 林琳赵斌殷天惠金彩虹何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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