A kind of metal ion doped bismuth vanadate yellow pigment and its preparation method and application

A technology of yellow pigments and metal ions, applied in the field of inorganic pigments, can solve the problem of limited near-infrared reflectivity of bismuth vanadate

Active Publication Date: 2022-03-01
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, Bi and V elements in bismuth vanadate still have certain toxicity
At present, ion doping is usually used to reduce the content of toxic metal elements and increase their near-infrared reflectivity. In the prior art, such as the invention patent with publication number CN109911938A, the near-infrared reflectivity is improved by doping La and Na, but this The method is limited to improving the near-infrared reflectance of bismuth vanadate, and its near-infrared reflectance is only 72%.

Method used

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  • A kind of metal ion doped bismuth vanadate yellow pigment and its preparation method and application
  • A kind of metal ion doped bismuth vanadate yellow pigment and its preparation method and application

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preparation example Construction

[0023] The present invention provides the preparation method of metal ion-doped bismuth vanadate yellow pigment described in the above technical scheme, comprising:

[0024] Bi 2 o 3 、Gd 2 o 3 , Li 2 CO 3 、MoO 3 and V 2 o 5 Calcination is carried out after mixing to obtain metal ion-doped bismuth vanadate yellow pigment.

[0025] Unless otherwise specified, the present invention has no special limitation on the source of each component, and commercially available products well known to those skilled in the art can be used.

[0026] In the present invention, the Bi 2 o 3 The mass content in the raw material is preferably 40-67%, more preferably 45-60%, more preferably 50-55%. In the present invention, the Bi 2 o 3 Used to provide Bi element.

[0027] In the present invention, the Gd 2 o 3 The mass content in the raw material is preferably 2.5-16%, more preferably 5-13%, more preferably 8-10%. The present invention will Gd 2 o 3 The mass content of is limited ...

Embodiment 1

[0042] Take by weighing reaction raw material according to mass content: Bi 2 o 3 66.18%, Gd 2 o 3 2.86%, Li 2 CO 3 0.58%, MoO 3 4.54% and V 2 o 5 25.84% 100g in total, put it into a planetary ball mill, use acetone as solvent, and ball-to-material ratio is 4:1 ball mill for 2 hours, put the ground powder into a high-temperature furnace for calcination at 800°C for 5 hours, cool naturally to room temperature and then put it into the planetary ball mill In a ball mill, acetone was used as a solvent and the ball-to-material ratio was 4:1 for ball milling for 4 hours to obtain metal ion-doped bismuth vanadate yellow pigment.

[0043] The crystal structure of the obtained pigment was characterized by X-ray powder diffraction method, and the results were as follows: figure 1 As shown, the obtained spectrum is compared with the standard card, and the result shows that the obtained pigment is a crystal of scheelite structure.

[0044] Use UV-vis-NIR spectrophotometer to meas...

Embodiment 2

[0046] Take by weighing reaction raw material according to mass content: Bi 2 o 3 53.88%, Gd 2 o 3 8.98%, Li 2 CO 3 1.83%, MoO 3 14.27% and V 2 o 5 21.04% 100g in total, put it into a planetary ball mill, use acetone as a solvent, and ball-to-material ratio is 4:1 ball mill for 2 hours, put the ground powder into a high-temperature furnace for calcination at 700°C for 6 hours, cool naturally to room temperature and then put it into the planetary ball mill In a ball mill, acetone was used as a solvent, and the ball-to-material ratio was 4:1 for ball milling for 5 hours to obtain metal ion-doped bismuth vanadate yellow pigment.

[0047] The crystal structure of the obtained pigment was characterized by X-ray powder diffraction method, and the results were as follows: figure 1 As shown, the obtained spectrum is compared with the standard card, and the result shows that the obtained pigment is a crystal of scheelite structure.

[0048] Use UV-vis-NIR spectrophotometer to ...

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Abstract

The invention provides a metal ion-doped bismuth vanadate yellow pigment and a preparation method and application thereof, belonging to the technical field of inorganic pigments. The metal ion doped bismuth vanadate yellow pigment provided by the invention comprises BiVO 4 and doped in the BiVO 4 Li in + 、Gd 3+ and Mo 6+ . The present invention utilizes lithium ions and gadolinium ions to replace BiVO 4 Part of the bismuth ions in the pigment, using molybdenum ions to replace part of the vanadium ions, can reduce the amount of Bi and V, reduce the content of toxic metal elements in the pigment, and at the same time inhibit BiVO 4 Doping is performed to tune the color of the pigment and increase its near-infrared reflectivity. The results of the examples show that the metal ion-doped bismuth vanadate yellow pigment provided by the present invention has a reflectivity of more than 90% in the near-infrared band of 780-2500 nm.

Description

technical field [0001] The invention relates to the technical field of inorganic pigments, in particular to a metal ion-doped bismuth vanadate yellow pigment and a preparation method and application thereof. Background technique [0002] Inorganic pigments with high infrared reflectance mainly reduce the temperature of coatings and coated objects by reflecting near-infrared rays in sunlight, and add them to coatings, glass, plastic films and other products to prepare new materials with reflective and heat-insulating functions. The product can be applied to the outer body of buildings, the coating of automobile shells, the heat insulation of offshore drilling platforms and oil storage tanks, etc. It can effectively reduce the surface temperature while reflecting the heat of the sun, and the color coating can meet people's growing demand High-quality life needs, it is a functional pigment with great application prospects. Commonly used inorganic pigments are lead chrome yello...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09C3/04
CPCC09C1/0006C09C3/043C09C3/041C01P2002/72C01P2006/90
Inventor 卫学玲包维维邹祥宇艾桃桃肖雷
Owner SHAANXI SCI TECH UNIV
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