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Lanthanum-cerium co-doping bismuth vanadate inorganic pigment and preparation method thereof

A technology of inorganic pigments and bismuth vanadate, applied in inorganic chemistry, chemical instruments and methods, vanadium compounds, etc., can solve problems such as the inability to meet the application of single bismuth vanadate, and achieve stable color development, improvement of main color and brightness, and reduction of The effect of energy consumption

Inactive Publication Date: 2013-12-04
SHAANXI UNIV OF SCI & TECH
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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 (0.0434g) of 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 and cerium, whose general formula is Bi 0.96 La 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 (0.0434g) of 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 and cerium, whose general formula is Bi 0.96 La 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 (0.0434g) of 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 and cerium, whose general formula is Bi 0.96 La 0.02 Ce 0.02 VO 4 .

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Abstract

The invention discloses lanthanum-cerium co-doping bismuth vanadate inorganic pigment and a preparation method thereof. The general formula of the bismuth vanadate inorganic pigment is Bil-x-yLaxCeyVO4, wherein x is larger than or equal to 0.02 and less than or equal to 0.1, and y is larger than or equal to 0.02 and less than or equal to 0.1. Chelating agents are utilized to assist and a microwave hydrothermal method is adopted to prepare the lanthanum-cerium co-doping bismuth vanadate pigment, the slow release of metal ions in the reaction process is facilitated through the addition of various chelating agents, so that the process of preparing the lanthanum-cerium co-doping bismuth vanadate pigment is carried out relatively lenitively; through the adoption of the microwave hydrothermal method to prepare, the preparation time is reduced. The lanthanum-cerium co-doping bismuth vanadate pigment prepared by the invention has the advantages that the improvement of the color generating performance of the bismuth vanadate pigment is facilitated through the doping of lanthanum and cerium.

Description

technical field [0001] The invention relates to the field of inorganic pigment preparation, in particular to a lanthanum 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 decompos...

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 SHAANXI UNIV OF SCI & TECH
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