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Bimetal-doped VIB-group metal oxide nano-material, preparation method therefor and application of bimetal-doped VIB-group metal oxide nano-material

A nano-material and bimetallic technology, applied in the field of inorganic oxide materials and their preparation, can solve the problems of reducing free electron concentration, poor infrared light absorption ability, and limited number of free electrons, and achieve narrow particle size distribution and near-infrared absorption High capacity and low cost effect

Active Publication Date: 2017-03-08
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] However, there are few reports on double-doped VIB group metal oxide materials in the published literature and patents, and most of them are traditional single-doped VIB group metal oxide materials. Because single-doped VIB group metal oxide materials The limited number of free electrons leads to poor absorption of infrared light, especially near-infrared light
In a few publicly reported double-doped VIB group metal oxides, there is usually a form of non-metallic elements doping oxygen instead, but this doping method is likely to cause distortion to the microstructure of the product, especially the crystal lattice. , so as to form electron capture or scattering centers, thereby reducing the concentration of free electrons or increasing their effective mass, which is not conducive to the improvement of infrared shielding performance
In addition, although some double-doped VIB group metal oxides adopt double-metal doping, the preparation methods such as plasma are used, and the process is complicated, which is not suitable for large-scale production.

Method used

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  • Bimetal-doped VIB-group metal oxide nano-material, preparation method therefor and application of bimetal-doped VIB-group metal oxide nano-material

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A kind of lithium potassium tungsten bronze Li 0.12 K 0.2 WO 3 Nanoparticles, the preparation method of which is as follows:

[0045] Prepare 80ml of 0.15mol / L potassium tungstate aqueous solution, and use 3mol / L hydrochloric acid solution to adjust the pH of the solution to 2.5. Then add 0.0015mol lithium nitrate and 0.002mol potassium nitrate, stir and mix evenly at room temperature; then add 0.15mol glycerol, then move the solution to a 150ml hydrothermal reaction kettle, and react in an oven at 160°C for 24h. After the reaction was completed and cooled to room temperature, the product was centrifuged, washed four times with 50 ml of deionized water and 50 ml of absolute ethanol, and dried in vacuum at 70°C. XRD and SEM tests were carried out on the obtained lithium potassium tungsten bronze powder particles. Such as figure 1 It is the XRD spectrum of the product of this example. The XRD test results show that its structure is similar to the peak position of NO...

Embodiment 2

[0047] A kind of lithium potassium tungsten bronze Li 0.29 K 0.23 WO 3 Nanoparticles, the preparation method of which is as follows:

[0048] Prepare 80ml of 0.15mol / L potassium tungstate aqueous solution, and use 3mol / L hydrochloric acid solution to adjust the pH of the solution to 2.5. Then add 0.004mol lithium nitrate and 0.003mol potassium nitrate, stir and mix evenly at room temperature; then add 0.15mol glycerol, then move the solution to a 150ml hydrothermal reaction kettle, and react in an oven at 160°C for 24h. After the reaction was completed and cooled to room temperature, the product was centrifuged, washed four times with 50 ml of deionized water and 50 ml of absolute ethanol, and dried in vacuum at 70°C. The results of XRD and TEM tests on the powder particles show that the crystal structure, appearance, size and properties of the particles are similar to the particles prepared in Example 1. Carry out XPS test on it, the test result is as follows image 3 As...

Embodiment 3

[0050] A kind of sodium potassium tungsten bronze Na 0.2 K 0.07 WO 3 Nanoparticles, the preparation method of which is as follows:

[0051] Prepare 80ml of 0.25mol / L sodium tungstate aqueous solution, and use 3mol / L hydrochloric acid solution to adjust the pH of the solution to 7.5. Then add 0.002mol potassium sulfate and 0.0045mol sodium sulfate, stir and mix evenly at room temperature, then add 0.075mol reducing agent ethylenediamine, then move the solution to a 150ml hydrothermal reaction kettle, and react in an oven at 180°C for 20h. After the reaction is completed and cooled to room temperature, the product is centrifuged and washed, and the powder particles are vacuum-dried at 70°C. Carry out SEM test on the powder particles, the results are as follows Figure 5 As shown, the obtained sodium potassium tungsten bronze particles are rod-shaped particles with a length of 50-500 nm and a width of 50-100 nm. Its shielding effect on near-infrared light is similar to that ...

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Abstract

The invention discloses a bimetal-doped VIB-group metal oxide nano-material, a preparation method therefor and an application of the bimetal-doped VIB-group metal oxide nano-material. A chemical formula of the VIB-group metal oxide nano-material disclosed by the invention is AxByMO3, wherein M is a VIB group element, A and B are dope elements present in the form of metal cations, O is an oxygen element, x is not smaller than 0 and not greater than 1, y is not smaller than 0 and not greater than 1, and the A and the B are one of different and self-existent main-group or subgroup elements. The metal oxide nano-material is prepared from a VIB-group metal element containing compound, a reducer and A-and-B-containing substances under hydrothermal conditions. The prepared bimetal-doped VIB-group oxide nanoparticles have very high near-infrared screening capacity and can be applied to the fields of photo-control materials and devices, glass energy saving and the like.

Description

technical field [0001] The invention relates to the field of inorganic oxide materials and their preparation. More specifically, it relates to a double-metal doped VIB group metal oxide nanomaterial and its preparation method and application. Background technique [0002] After entering the 21st century, modern civilized society is facing many challenges. Among them, the energy crisis has become one of the biggest obstacles to the sustainable development of society. World building energy consumption accounts for 30% to 40% of the entire energy consumption, and about 50% of the energy loss of the entire building is consumed on doors and windows. According to estimates, 90% of the buildings built in my country are not energy-saving, and it is predicted that by 2020, my country's construction area will reach 70 billion square meters, which means that building energy consumption will increase sharply. If no energy-saving measures are taken, it is predicted that by 2020, China...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00B82Y30/00
CPCB82Y30/00C01G41/006C01P2002/72C01P2002/85C01P2004/03C01P2004/04C01P2004/16C01P2004/64
Inventor 陈建峰杨晨熹曾晓飞
Owner BEIJING UNIV OF CHEM TECH
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