Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing metal tungstate nanomaterial by use of micro-arc oxidation process and use of nanomaterial

A technology of micro-arc oxidation and nano-materials, which is applied in the direction of tungsten oxide/tungsten hydroxide, etc., can solve the problems that cannot meet the application requirements, the product shape is difficult to control, and produce toxic gases, etc. Superior, low-cost effect

Active Publication Date: 2015-05-06
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the reports on the preparation methods of metal tungstate mainly include hydrothermal method, microwave method, mechanical synthesis method, electrochemical synthesis method, sputtering method, etc., but the above methods have different degrees of high cost, produce toxic gas, and produce The shape is difficult to control and other problems, and because the prepared metal tungstate is relatively small, it can only be used for research and cannot meet the needs of applications. There have been no reports on the preparation of metal tungstate nanomaterials by micro-arc oxidation.

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 metal tungstate nanomaterial by use of micro-arc oxidation process and use of nanomaterial
  • Method for preparing metal tungstate nanomaterial by use of micro-arc oxidation process and use of nanomaterial
  • Method for preparing metal tungstate nanomaterial by use of micro-arc oxidation process and use of nanomaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In this example, after micro-arc oxidation, impregnation and sintering on the Ti sheet, NiWO was grown. 4 Nanowires, specifically as follows:

[0053] 1. Add 1L deionized water to the beaker, and add 25.08g Na 3 PO 4 12H 2 O, 12.97 g Na 2 B 4 o 7 10H 2 O and 1.98g Na 2 WO 4 2H 2 O, add 19.91g Ni(CH 3 COO) 2 , and continue to stir for 5h to obtain the electrolyte solution for micro-arc oxidation.

[0054] 2. Using industrial pure titanium (Gr1) as the substrate, first cut the titanium sheet into a suitable size, and then pretreat it. Put the Ti sheet in acetone for 15 minutes to sonicate, remove the oil on the surface, then rinse the residual acetone with deionized water, and then put the Ti sheet in H at room temperature. 2 O:HNO 3 : HF=5:4:1 (volume ratio) for 60s to remove the oxide layer on the surface, and finally wash it with deionized water and absolute ethanol.

[0055]3. Put the electrolyte obtained in step 1 into a stainless steel electrolytic ce...

Embodiment 2

[0062] The difference from Example 1 is that in this example, NiWO with different shapes can be obtained by controlling the current density of micro-arc oxidation and the time of micro-arc oxidation. 4 The shape is as follows:

[0063] 1. Add 1L deionized water to the beaker, and add 25.08g Na 3 PO 4 12H 2 O, 12.97 g Na 2 B 4 o 7 10H 2 O and 2.64 g Na 2 WO 4 2H 2 O, add 24.88g Ni(CH 3 COO) 2 , continue stirring for 5h.

[0064] 2. Use industrial pure titanium as the substrate to pretreat it. place the base in H 2 O:HNO 3 : HF=5:4:1 (volume ratio) for 60s, then washed 4 times with deionized water and 2 times with absolute ethanol.

[0065] 3. Put the electrolyte obtained in step 1 into an electrolytic cell, and use the pretreated industrially pure titanium as an anode electrode for micro-arc oxidation to perform micro-arc oxidation. Its current density is 10A / dm 2 , the time of micro-arc oxidation is 15min.

[0066] 4. Put the sample obtained in step 3 into 0....

Embodiment 3

[0072] The difference from Example 1 is that this example obtains different metal tungstate materials by changing the composition of the electrolyte and immersion solution, as follows:

[0073] 1. Add 1L deionized water into the beaker, and add 38.14gNa 3 PO 4 12H 2 O, 12.97 g Na 2 B 4 o 7 10H 2 O and 1.98g Na 2 WO 4 2H 2 O, add 21.95g Zn(CH 3 COO) 2 , continue stirring for 5h.

[0074] 2. Use industrial pure titanium as the substrate to pretreat it. place the base in H 2 O:HNO 3 : HF=5:4:1 (volume ratio) for 60s, then washed 4 times with deionized water and 2 times with absolute ethanol.

[0075] 3. Put the electrolyte obtained in step 1 into an electrolytic cell, and use the pretreated industrially pure titanium as an anode electrode for micro-arc oxidation to perform micro-arc oxidation. Its current density is 10A / dm 2 , the time of micro-arc oxidation is 10min.

[0076] 4. Put the sample obtained in step 3 into 0.5mol / L Zn(NO 3 ) 2 Soak in the solution f...

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of micro-arc oxidation, industrial catalysis, photocatalysis, nanomaterials and nanotechnology, and in particular relates to a method for preparing a metal tungstate nanomaterial by use of a micro-arc oxidation process and a use of the nanomaterial. The preparation method of the metal tungstate nanomaterial comprises the following steps: by taking a valve metal or an alloy thereof as a substrate, putting the substrate in an electrolyte containing wolframate radicals, generating a rough and porous oxide film on the surface of the substrate by use of the micro-arc oxidation process, next, dipping in a metal salt solution and then carrying out annealing treatment, thereby obtaining the metal tungstate nanomaterial. The preparation method is simple in process and free from atmosphere protection; the adopted raw materials is low in production cost, pollution-free and environmentally friendly; meanwhile, as the metal oxide film is generated in situ on the surface of the substrate, the film is excellent in bonding force with the substrate. The prepared metal tungstate nanomaterial is quite uniform in dimension and even in growth and distribution. The prepared metal tungstate nanomaterial can be used as a photocatalytic material, an electroluminescent material, a hydrodesulfurization catalyst and the like.

Description

technical field [0001] The invention relates to the fields of micro-arc oxidation, industrial catalysis, photocatalysis, nanomaterials and nanotechnology, in particular to a method and application of a micro-arc oxidation method for preparing metal tungstate nanomaterials. Background technique [0002] Due to its small average particle size, many surface atoms, large specific surface area, and high surface energy, nanomaterials have unique properties that conventional materials do not have. Therefore, nanomaterials have very important application prospects in the fields of magnetism, electricity, optics, heat and life sciences, and have attracted close attention from research institutions and researchers around the world. Some scholars even predict that nanotechnology will become the leading technology in the 21st century. technology. Among them, one-dimensional nanomaterials have great application prospects in the construction of electronic and optical devices and environm...

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): C01G41/02
Inventor 姜辛姜亚南翟朝峰刘宝丹
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI