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BixCel-xVO4 nanorod with visible-light activity and preparation method

A nanorod and visible light technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of limited development, poor stability of vanadate compounds, and easy photocorrosion, etc., and is easy to operate and conducive to adsorption. Degradation, the effect of improving separation efficiency

Inactive Publication Date: 2015-09-23
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the deepening of research, most vanadate compounds have poor stability and are prone to photocorrosion, which limits their development.

Method used

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  • BixCel-xVO4 nanorod with visible-light activity and preparation method
  • BixCel-xVO4 nanorod with visible-light activity and preparation method
  • BixCel-xVO4 nanorod with visible-light activity and preparation method

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Experimental program
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Effect test

Embodiment 1

[0027] 1.84g Bi(NO 3 ) 3 ·5H 2 O and 1.63g Ce(NO 3 ) 3 ·6H 2 O powder was dissolved in 50mL water, stirred at room temperature for 30min, and ultrasonicated for 30min to obtain A solution; add 0.88g of NH 4 VO 3Add 50mL of water, dissolve in a water bath at 60°C, and stir for 30min to obtain solution B. Solution A was added dropwise to solution B under stirring to obtain a yellow clear liquid. The mixed solution was transferred to a 120mL autoclave lined with polytetrafluoroethylene, hydrothermally reacted at 147.4kPa and 160°C for 3h, and cooled naturally to room temperature. Centrifuge and collect the light yellow precipitate at the bottom, wash the precipitate with deionized water and ethanol in turn, dry the precipitate in a 60°C drying oven, and grind it into fine particles. The dried sample was heated up to 500°C at 10°C / min, and calcined at 500°C for 24 hours, and the obtained light yellow powder was Bi 0.5 Ce 0.5 VO 4 Nanorods, from figure 1 Bi can be clear...

Embodiment 2

[0029] 0.34g Bi(NO 3 ) 3 ·5H 2 O and 2.61g Ce(NO 3 ) 3 ·6H 2 O powder was dissolved in 50mL water, stirred at room temperature for 30min, and ultrasonicated for 15min to obtain A solution; add 0.88g of NH 4 VO 3 Add 50mL of water, dissolve in a water bath at 60°C, and stir for 30min to obtain solution B. Solution A was added dropwise to solution B under stirring to obtain a yellow clear liquid. The mixed solution was transferred to a 120mL autoclave lined with polytetrafluoroethylene, hydrothermally reacted at 133.7kPa and 120°C for 6h, and cooled naturally to room temperature. Centrifuge and collect the light yellow precipitate at the bottom, wash the precipitate with deionized water and ethanol in turn, dry the precipitate in a 60°C drying oven, and grind it into fine particles. The dried sample was heated up to 800°C at 10°C / min, and calcined at 800°C for 12 hours, and the obtained light yellow powder was Bi 0.2 Ce 0.8 VO 4 Nano stave.

Embodiment 3

[0031] 2.84g Bi(NO 3 ) 3 ·5H 2 O and 0.65g Ce(NO 3 ) 3 ·6H 2 O powder was dissolved in 50mL water, stirred at room temperature for 30min, and ultrasonicated for 60min to obtain A solution; add 0.88g of NH 4 VO 3 Add 50mL of water, dissolve in a water bath at 60°C, and stir for 30min to obtain solution B. Solution A was added dropwise to solution B under stirring to obtain a yellow clear liquid. The mixed solution was transferred to a 120mL autoclave lined with polytetrafluoroethylene, hydrothermally reacted at 161.1kPa, 200°C for 1h, and cooled naturally to room temperature. Centrifuge and collect the light yellow precipitate at the bottom, wash the precipitate with deionized water and ethanol in turn, dry the precipitate in a 60°C drying oven, and grind it into fine particles. The dried sample was heated up to 300°C at 10°C / min, and calcined at 300°C for 48 hours, and the obtained light yellow powder was Bi 0.8 Ce 0.2 VO 4 Nano stave.

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Abstract

A BixCel-xVO4 nanorod with visible-light activity is a nanoscale compound having a rod-like light-yellow microstructure and obtained by hydrothermal reaction of Bi(NO3)3.5H2O, Ce(NO3)3.6H2O and NH4VO3 at a molar ratio of x to 1-x to 1 (x is more than 0 and less than 1). A preparation method for the BixCel-xVO4 nanorod mainly comprises the following steps: uniformly mixing Bi(NO3)3.5H2O, Ce(NO3)3.6H2O and water to obtain a solution A; adding water into the NH4VO3 and dissolving a mixture in water bath with the temperature of 60 DEG C to obtain a solution B; dropwise adding the solution A into the solution B, performing hydrothermal reaction at 120 to 200 DEG C for 1 to 6 hours, cleaning precipitates, drying, and then calcining at 300 to 800 DEG C for 12 to 48 hours to obtain a light-yellow powdery substance, namely the BixCel-xVO4 nanorod. The BixCel-xVO4 nanorod is large in specific surface area and strong in adsorption capacity, has better visible-light absorption performance and greatly improves photocatalytic oxidation degradation of organic pollutants; and the preparation method for the BixCel-xVO4 nanorod is relatively simple and easy to operate.

Description

technical field [0001] The invention relates to a semiconductor photocatalyst for controlling environmental pollution and a preparation method. Background technique [0002] Energy crisis and environmental problems are two serious problems that human beings must face. How to effectively control and control the pollution of various chemical pollutants to the environment is the focus of comprehensive environmental management. In recent years, semiconductor photocatalytic oxidation technology, one of the advanced oxidation technologies, is being extensively studied by scholars at home and abroad. This technology can use solar energy as energy to degrade pollutants in the environment, effectively use solar energy, and reduce people's Energy use. [0003] Semiconductor photocatalytic oxidation technology began when Japanese scientists Fujishima and Honda discovered TiO irradiated by light 2 Single crystal electrodes can convert H 2 O decomposition, using TiO 2 The conversion ...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J35/10B01D53/86
Inventor 邹学军魏裕庭董玉瑛
Owner DALIAN NATIONALITIES UNIVERSITY
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