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A kind of tungsten bronze with substituted heteroatoms in tungsten and oxygen lattice sites, its preparation method and application

A technology of tungsten bronze and heteroatoms, which is applied to tungsten bronze with substitutional heteroatoms at tungsten and oxygen lattice points and its preparation and application fields, which can solve the harsh preparation conditions and increase the technical requirements of hydrothermal equipment for tungsten bronze powder Preparation cost and other issues, to achieve the effect of reducing preparation cost, improving electrical conductivity and transparent heat insulation properties, and strong heat insulation ability

Active Publication Date: 2016-04-20
HEBEI TIANBO CONSTR TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in the existing technology, the preparation conditions of tungsten bronze are relatively harsh (for example, the hydrothermal treatment temperature in the Chinese invention patent with publication number CN102320662 is 180~200°C), which will inevitably increase the technical requirements of hydrothermal equipment and tungsten bronze powder. The preparation cost of the body affects its popularization and application

Method used

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  • A kind of tungsten bronze with substituted heteroatoms in tungsten and oxygen lattice sites, its preparation method and application
  • A kind of tungsten bronze with substituted heteroatoms in tungsten and oxygen lattice sites, its preparation method and application
  • A kind of tungsten bronze with substituted heteroatoms in tungsten and oxygen lattice sites, its preparation method and application

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Experimental program
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Embodiment 1

[0041] Dissolve 0.2g of ammonium tungstate in 20ml of deionized water, add 1g of oxalic acid and stir evenly, adjust the pH value of the solution to 1.5 with concentrated hydrochloric acid, age the above solution for 2 hours at room temperature, and then add 0.05g of fluoride Ammonium (NH 4 F), after adding 0.05g sodium borohydride (NaBH 4 ), pour it into a 50ml hydrothermal kettle, conduct hydrothermal treatment at 150°C for 3 hours, and centrifugally dry to obtain tungsten bronze powder, whose general formula is (NH 4 ) 0.33 WO 2.75 f 0.2 , yield 78%. Such as figure 2 As shown in the scanning electron microscope photo, the tungsten bronze powder is a particle with a diameter of 30~50nm.

Embodiment 2

[0043] Dissolve 1.2g of sodium phosphotungstate in 30ml of deionized water, add 0.5g of citric acid and stir evenly, adjust the pH value of the solution to 0.5 with concentrated hydrochloric acid, and age the above solution for 72 hours at room temperature, then Add 0.8g stannous chloride (SnCl 2 ), pour it into a 50ml hydrothermal kettle, hydrothermally treat at 60°C for 48 hours, and centrifugally dry to obtain tungsten bronze powder, whose general formula is Na 0.33 W 0.88 sn 0.12 o 2.92 , the yield is 90%. Such as image 3 As shown in the scanning electron microscope photo, the tungsten bronze powder is granular with a diameter of 10-30nm.

Embodiment 3

[0045] Dissolve 4.8g of potassium tungstate in 40ml of deionized water, add 2ml of glacial acetic acid and stir evenly, then adjust the pH value of the solution to 0.2 with concentrated hydrochloric acid, and add 0.5g of hydrazine hydrochloride (N 2 h 4 ?HCl), 1g ammonium fluoride (NH 4 F) and 1.2g nickel chloride (NiCl 2 ), pour it into a hydrothermal kettle, hydrothermally treat at 100°C for 12 hours, and centrifugally dry to obtain tungsten bronze powder, whose general formula is (NH 4 ) 0.33 W 0.9 Ni 0.1 o 2.75 f 0.2 , the yield is 95%. The tungsten bronze powder is in the shape of a short rod with a diameter of 5-10nm and a length of 15-100nm.

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Abstract

The invention belongs to the tungsten bronze preparation and application thereof in the chemical engineering filed and the material field, and specifically relates to tungsten bronze powder with substitutional hetero-atoms at tungsten and oxygen lattice point positions as well as a preparation method and application of the tungsten bronze. A technical problem to be solved is as follows: a technical scheme for further improving concentration and transparent insulation performances of free electrons in the tungsten bronze, effectively adjusting and controlling forbidden bandwidth of a tungsten bronze material and effectively lowering hydrothermal preparation difficulty of the material is provided. The specific scheme is as follows: the chemical general formula of the tungsten bronze is M1xW(1-y)M2yO(3-z-t)nMt, wherein M2 in the formula is a positive ion with chemical valence +3, +4 or +5, and exists in a tungsten bronze lattice in a form of a substitutional atom to occupy the lattice point position of W; nM in the formula is a negative ion, with the chemical valence of (-)1, of a nonmetal element, and exists in the tungsten bronze lattice in the form of the substitutional atom to occupy the lattice point position of O. The tungsten bronze powder or tungsten bronze dispersion liquid disclosed by the invention is low in preparation cost, excellent in performance and extensive in use.

Description

technical field [0001] The invention belongs to the preparation and application of tungsten bronze in the fields of chemical industry and materials, and in particular relates to tungsten bronze powder with substitutional heteroatoms in W and O lattice sites, and a preparation method and application thereof. Background technique [0002] Studies have shown that temperate regions receive 1000kWh / m of solar energy per year 2 . Modulation of solar energy passing through building glass (ie energy intake) has great potential for energy saving (Granqvist, C.G. (2007). Solar Energy Materials and Solar Cells 91 (17): 1529-1598.). In terms of the wavelength distribution of solar energy, ultraviolet light, visible light and infrared light account for 7%, 50% and 43% of sunlight, respectively. The transparent thermal insulation material can selectively transmit visible light to ensure visual transparency and natural lighting in the interior, while achieving shading of ultraviolet and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00C01G53/00B82Y30/00C09D7/12C09D175/04C09D133/00C09D163/00C09D167/08C09D183/00
Inventor 康利涛轩海成王锟梁伟高峰李影邓加春李培养
Owner HEBEI TIANBO CONSTR TECH
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