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CoWO4/Bi2WO6 composite acoustic catalyst as well as preparation method and application thereof

A catalyst and composite acoustic technology, applied in the field of CoWO4/Bi2WO6 composite acoustic catalyst and its preparation, can solve the problems of low acoustic catalysis efficiency, and achieve the effects of efficient degradation, improved acoustic catalytic activity, and short synthesis time

Pending Publication Date: 2021-11-30
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a CoWO 4 / Bi 2 WO 6 Composite acoustic catalysts to address monomeric CoWO 4 The problem of low acoustic catalytic efficiency

Method used

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  • CoWO4/Bi2WO6 composite acoustic catalyst as well as preparation method and application thereof
  • CoWO4/Bi2WO6 composite acoustic catalyst as well as preparation method and application thereof
  • CoWO4/Bi2WO6 composite acoustic catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 CoWO 4 / Bi 2 WO 6 Composite Acoustic Catalyst

[0029] (1) The preparation method is as follows

[0030] 1. CoWO 4 preparation of

[0031] According to the molar ratio of 1:1, 0.5mmol Co(NO 3 ) 2 ·6H 2 O and 0.5 mmol Na 2 WO 4 2H 2 O was placed in an Erlenmeyer flask containing 30 mL of deionized water, stirred by magnetic force for 30 min, poured into a polytetrafluoroethylene reaction kettle, and placed in a blast drying oven at 180°C for 24 h; Dry at ℃ for 2 hours, grind into a fine powder with an agate mortar, and obtain CoWO 4 powder.

[0032] 2. CoWO 4 / Bi 2 WO 6 Preparation of Composite Acoustic Catalyst

[0033] Take CoWO 4 powder (200mg, 0.65mmol), and disperse it in 30mL deionized water to obtain CoWO 4 aqueous solution.

[0034] Bi(NO 3 ) 3 ·5H 2 O (315.2mg, 0.65mmol) dissolved in 20mL concentration is 1mol L -1 HNO 3 , after magnetic stirring, the resulting solution was slowly added dropwise to CoWO 4 In aqueous solution, s...

Embodiment 2

[0041] Example 2 CoWO 4 / Bi 2 WO 6 Preparation of Composite Acoustic Catalyst

[0042] Take CoWO 4 powder (200mg, 0.65mmol), and disperse it in 30mL deionized water to obtain CoWO 4 aqueous solution.

[0043] Bi(NO 3 ) 3 ·5H 2 O (157.6mg, 0.325mmol) was dissolved in 20mL with a concentration of 1mol L -1 HNO 3 , after magnetic stirring, the resulting solution was slowly added dropwise to CoWO 4 In aqueous solution, solution A was obtained.

[0044] Na 2 WO 4 2H 2 O (53.4mg, 0.18mmol) was dissolved in 20mL with a concentration of 1mol L -1 In NaOH, solution B was obtained.

[0045] Solution A was slowly added dropwise to solution B, and after continuous stirring, the resulting mixed solution was transferred to an autoclave, and hydrothermally reacted in an oven at 180° C. for 8 hours.

[0046] Suction filtration, washed several times with deionized water and absolute ethanol successively, the product was dried at 60°C for 2h, and the molar ratio, Bi 3 + :Co 2...

Embodiment 3

[0047] Example 3 CoWO 4 / Bi 2 WO 6 Preparation of Composite Acoustic Catalyst

[0048] Take CoWO 4 powder (200mg, 0.65mmol), and disperse it in 30mL deionized water to obtain CoWO 4 aqueous solution.

[0049] Bi(NO 3 ) 3 ·5H 2 O (78.8mg, 0.163mmol) was dissolved in 20mL with a concentration of 1mol L -1 HNO 3 , after magnetic stirring, the resulting solution was slowly added dropwise to CoWO 4 In aqueous solution, solution A was obtained.

[0050] Na 2 WO 4 2H 2 O (26.7mg, 0.09mmol) was dissolved in 20mL with a concentration of 1mol L -1 In NaOH, solution B was obtained.

[0051] Solution A was slowly added dropwise to solution B, and after continuous stirring, the resulting mixed solution was transferred to an autoclave, and hydrothermally reacted in an oven at 180° C. for 8 hours.

[0052] Suction filtration, washed several times with deionized water and absolute ethanol successively, the product was dried at 60°C for 2h, and the molar ratio, Bi 3 + :Co 2+...

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Abstract

The invention discloses a CoWO4 / Bi2WO6 composite acoustic catalyst as well as a preparation method and application thereof. The preparation method comprises the steps: dissolving Bi(NO3)3.5H2O in HNO3, fully stirring, and slowly dropwise adding the obtained solution into a CoWO4 aqueous solution to obtain a solution A; dissolving Na2WO4.2H2O in NaOH to obtain a solution B; slowly dropwise adding the solution A into the solution B, continuously stirring, transferring the obtained mixed solution into a high-pressure kettle, and carrying out hydrothermal reaction; and carrying out suction filtration, washing and drying to obtain the CoWO4 / Bi2WO6 composite acoustic catalyst. Bi2WO6 has a unique flower-shaped hierarchical structure and a relatively large specific surface area, and provides a structural framework for directional high-density and uniform growth of nano particles on a sheet shape. The sound catalytic activity of the compounded sound catalyst is greatly improved, and the composite acoustic catalyst has high practical value in the field of environment purification.

Description

technical field [0001] The invention belongs to the field of acoustic catalysts, in particular to a CoWO 4 / Bi 2 WO 6 Composite acoustic catalyst and its preparation method and application. Background technique [0002] Cobalt tungstate (CoWO 4 ), as an important material in the field of electronics and optics, is one of the simplest members of the tungstate family and has good sonocatalytic activity. But monomeric CoWO 4 Acoustic catalytic efficiency is low. Therefore, it is necessary to develop a simple, economical and effective preparation method to improve CoWO 4 The sonocatalytic activity needs further study. Contents of the invention [0003] The purpose of the present invention is to provide a CoWO 4 / Bi 2 WO 6 Composite acoustic catalysts to address monomeric CoWO 4 The problem of low acoustic catalytic efficiency. [0004] Another object of the present invention is to provide a CoWO 4 / Bi 2 WO 6 Preparation method of composite acoustic catalyst. ...

Claims

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Application Information

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IPC IPC(8): B01J23/31B01J23/888B01J37/10C02F1/36C02F101/34C02F101/36C02F101/38
CPCB01J23/888B01J23/31B01J23/002B01J37/10C02F1/36B01J2523/00C02F2101/34C02F2101/36C02F2101/38B01J35/23B01J2523/54B01J2523/69B01J2523/845
Inventor 王思幻徐亮刘妮萍吴学签张琳王新
Owner LIAONING UNIVERSITY
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