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

Preparation method of size-controllable amorphous tantalum oxide nanospheres

An amorphous, tantalum oxide technology, applied in the field of nanomaterials, can solve the problems of incomplete sunlight energy and low photocatalytic efficiency, and achieve the effects of low production cost, excellent photocatalytic activity, and easy operation

Inactive Publication Date: 2021-04-09
NORTHEASTERN UNIV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yet ultraviolet light only accounts for about 5% of sunlight, and this incomplete utilization of sunlight energy also causes Ta 2 o 5 One of the reasons for the low photocatalytic efficiency

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 of size-controllable amorphous tantalum oxide nanospheres
  • Preparation method of size-controllable amorphous tantalum oxide nanospheres
  • Preparation method of size-controllable amorphous tantalum oxide nanospheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] like figure 1 As shown, Example 1 proposes a 400-500 nm surface smooth amorphous Ta 2 O 5 The preparation method of nanospheres specifically includes the following steps:

[0049] 1. Weigh out 0.05 mmol of TaCl 5 The raw materials were dissolved in 15 mL of ethanol and mixed well.

[0050] 2. Add urea and oxalic acid to the ethanol solution of tantalum chloride, the substance ratio of tantalum chloride and urea is 1:10, and the substance ratio of tantalum chloride and oxalic acid is 1:5, and the solution is mixed with full stirring evenly.

[0051] 3. Transfer the mixed solution into a high-pressure reaction kettle for alcohol thermal reaction, the hydrothermal temperature is 240°C, and the hydrothermal time is 12h.

[0052] 4. Centrifuge the precipitate obtained by the alcohol thermal reaction at 4000 rpm for 8 min, and dry at 60° C. for 4 h. get amorphous Ta 2 O 5 Nanospheres.

[0053] figure 2 For the product XRD pattern prepared in Example 1, it can be se...

Embodiment 2

[0056] Add the surfactant PVP to the reactant to control the surface roughness of the amorphous tantalum oxide nanospheres, which specifically includes the following steps:

[0057] 1. Weigh out 0.05 mmol of TaCl 5 The raw materials were dissolved in 15 mL of ethanol and mixed well.

[0058] 2. Add urea, oxalic acid and PVP to the ethanol solution of tantalum chloride, the substance ratio of tantalum chloride to urea is 1:10, the substance ratio of tantalum chloride to oxalic acid is 1:5, and the ratio of tantalum chloride to oxalic acid is 1:5. The ratio of the substance to PVP is 1:1, and the solution is thoroughly mixed to make the solution evenly mixed.

[0059] 3. Transfer the mixed solution into a high-pressure reaction kettle for alcohol thermal reaction, the hydrothermal temperature is 240°C, and the hydrothermal time is 12h.

[0060] 4. Centrifuge the precipitate obtained by the alcohol thermal reaction at 4000 rpm for 8 min, and dry at 60° C. for 4 h. get amorphou...

Embodiment 3

[0063] Adjust the amount of PVP added, control the size of the amorphous tantalum oxide nanospheres, set the material ratio of tantalum chloride to PVP to 1:5, and fully stir to mix the solution evenly. Other conditions are the same as in Example 2. like Image 6 shown, the resulting amorphous Ta 2 O 5 Nanospheres are 300-400 nm in size.

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
Sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses size-controllable amorphous tantalum oxide nanospheres and a preparation method thereof. The method comprises the following steps of: adding urea and oxalic acid into an ethanol solution of tantalum chloride, uniformly stirring, transferring the mixed solution into a high-pressure reaction kettle, carrying out alcohol thermal reaction to obtain amorphous tantalum oxide nanospheres, and adjusting the sizes of the nanospheres by adding different amounts of PVP. The diameter of the amorphous cerium oxide nanospheres obtained by the method can be regulated and controlled from 500nm to 100nm, the granularity is uniform, and the dispersity is good. Compared with commercial tantalum oxide, the surface area of the amorphous tantalum oxide nanospheres is remarkably increased, and more adsorption sites are provided for dye molecules, so that the adsorption and photocatalytic performance is promoted to be improved.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a size-controllable amorphous tantalum oxide nanosphere and a preparation method thereof. Background technique [0002] Tantalum oxide (Ta 2 o 5 ) is the most common oxide of tantalum and the final product of metal tantalum oxidation in air. Because of Ta 2 o 5 The chemical properties are very stable, insoluble in general acid or alkali, so Ta 2 o 5 It is widely used as a coating material, a catalyst, and the like. The industry generally uses metal tantalum oxidation or tantalic acid dehydration process 2 o 5 preparation. However, the specific surface area of ​​the product obtained by the traditional process is relatively small, which limits Ta 2 o 5 application of materials. For the same volume of nanomaterials and bulk materials, the specific surface area of ​​nanomaterials is significantly larger than that of bulk materials, which provides more active sites for the...

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): C01G35/00B01J23/20B01J35/00B01J35/10B01J35/02
CPCC01G35/00B01J23/20C01P2004/32C01P2004/62C01P2006/12B01J35/39B01J35/40B01J35/615
Inventor 付海涛王岩杨晓红安希忠邹清川张浩赵晨
Owner NORTHEASTERN 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