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Lanthanum, yttrium and cerium co-doped bismuth vanadate inorganic pigment and preparation method thereof

An inorganic pigment, bismuth vanadate technology, applied in chemical instruments and methods, inorganic chemistry, vanadium compounds, etc., can solve problems such as the inability to meet the application of single bismuth vanadate, achieve stable color development, pure color tone, and improve color rendering performance Effect

Active Publication Date: 2013-12-18
中山市正合色彩资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these are far from satisfying the application of single bismuth vanadate in practical fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 5mmol (2.4254g) of Bi(NO 3 ) 3 ·5H 2 O dissolved to 1mol / L, 20ml of HNO 3 solution, and then add 0.1mmol (0.0325g) of La(NO 3 ) 3 , 0.1mmol (0.0383g) of Y(NO 3 ) 3 ·6H 2 O, 0.1mmol (0.0434g) Ce(NO 3 ) 3 ·6H 2 O and 2.5mmol (0.7306g) of ethylenediaminetetraacetic acid were stirred thoroughly to obtain solution A; 5mmol (0.7898g) of NaVO 3 2H 2 O was dissolved in 1mol / L, 20ml NaOH solution, and stirred thoroughly to obtain solution B; the above-mentioned solutions A and B were mixed and fully stirred, then transferred to a hydrothermal kettle, and microwaved at 160°C for 1 hour. Then, wash several times with deionized water and absolute ethanol, and then dry in a vacuum oven at 60°C for 12 hours to obtain a bismuth vanadate pigment co-doped with lanthanum, yttrium and cerium, whose general formula is Bi 0.94 La 0.02 Y 0.02 Ce 0.02 VO 4 .

Embodiment 2

[0021] 5mmol (2.4254g) of Bi(NO 3 ) 3 ·5H 2 O dissolved to 4mol / L, 20ml of HNO 3 solution, and then add 0.1mmol (0.0325g) of La(NO 3 ) 3 , 0.1mmol (0.0383g) of Y(NO 3 ) 3 ·6H 2 O, 0.1mmol (0.0434g) Ce(NO 3 ) 3 ·6H 2 O and 10mmol (2.9224g) of ethylenediaminetetraacetic acid were stirred thoroughly to obtain solution A; 5mmol (0.7898g) of NaVO 3 2H 2 Dissolve O in 4mol / L, 20ml NaOH solution, and stir well to obtain solution B; mix and stir the above-mentioned A and B solutions, transfer them to a hydrothermal kettle, and microwave for 3 hours at 220°C. Then, wash several times with deionized water and absolute ethanol, and then dry in a vacuum oven at 60°C for 12 hours to obtain a bismuth vanadate pigment co-doped with lanthanum, yttrium and cerium, whose general formula is Bi 0.94 La 0.02 Y 0.02 Ce 0.02 VO 4 .

Embodiment 3

[0023] 5mmol (2.4254g) of Bi(NO 3 ) 3 ·5H 2 O dissolved to 1mol / L, 20ml of HNO 3 solution, and then add 0.1mmol (0.0325g) of La(NO 3 ) 3 , 0.1mmol (0.0383g) of Y(NO 3 ) 3 ·6H 2 O, 0.1mmol (0.0434g) Ce(NO 3 ) 3 ·6H 2 O and 2.5mmol (0.7353g) of sodium citrate, stirred thoroughly to obtain solution A; 5mmol (0.7898g) of NaVO 3 2H 2 O was dissolved in 1mol / L, 20ml NaOH solution, and stirred thoroughly to obtain solution B; the above-mentioned solutions A and B were mixed and fully stirred, then transferred to a hydrothermal kettle, and microwaved at 160°C for 1 hour. Then, wash several times with deionized water and absolute ethanol, and then dry in a vacuum oven at 60°C for 12 hours to obtain a bismuth vanadate pigment co-doped with lanthanum, yttrium and cerium, whose general formula is Bi 0.94 La 0.02 Y 0.02 Ce 0.02 VO 4 .

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Abstract

The invention discloses a lanthanum, yttrium and cerium co-doped bismuth vanadate inorganic pigment and a preparation method thereof. The general formula of the inorganic pigment is Bi1-x-y-zLaxYyCezVO4, wherein x is not less than 0.02 and not more than 0.1, y is not less than 0.02 and not more than 0.1, and z is not less than 0.02 and not more than 0.1; chelating agents are utilized for assistance, and a microwave hydrothermal method is used for preparing the lanthanum, yttrium and cerium co-doped bismuth vanadate pigment; the different chelating agents are added so as to be favorable for slow release of metal ions in a reaction process, thereby enabling the generation process of the lanthanum, yttrium and cerium co-doped bismuth vanadate pigment to proceed more mildly; the microwave hydrothermal method is used to shorten the preparation time; and the doping of the prepared lanthanum element, yttrium element and cerium element is favorable for improving the color-forming performance of the bismuth vanadate pigment.

Description

technical field [0001] The invention relates to the field of inorganic pigment preparation, in particular to a lanthanum, yttrium and cerium co-doped bismuth vanadate inorganic pigment and a preparation method thereof. Background technique [0002] Since the 1980s, bismuth vanadate has been widely used in the two fields of photocatalytic degradation and inorganic pigments due to its non-toxic, bright color, good corrosion resistance, and photocatalytic properties. As an environmentally friendly inorganic material, it has gradually replaced environmentally harmful pigments in the field of pigments and has become a new type of pigment that is widely used. In recent decades, scholars have done a lot of research on the application of bismuth vanadate in inorganic pigments. For example, different methods are used to prepare bismuth vanadate pigments. The main methods are: solid phase method, impregnation method, water Thermal method, photoreduction method, modified metal-organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00
Inventor 李军奇张炼刘辉何选盟朱振峰崔明明刘振兴
Owner 中山市正合色彩资源有限公司
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