Preparation method of nanometer Bi2WO6/rectorite composite catalyst

A composite catalyst and rectorite technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of small powder specific surface area, difficulty in separation and recovery, low utilization efficiency, etc., and achieve strong adsorption , high visible light activity, easy to control the effect

Inactive Publication Date: 2013-02-06
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently about Bi 2 WO 6 The research on photocatalytic technology is mostly limited to Bi 2 WO 6 The degradation of pollutants by the powder suspension system can not solve the problem of nano-Bi in the wastewater treatment process. 2 WO 6 The specific surface area of ​​the powder is small, easy to coagulate, easy to deactivate, low utilization efficiency, difficult to separate and recover, etc.

Method used

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  • Preparation method of nanometer Bi2WO6/rectorite composite catalyst
  • Preparation method of nanometer Bi2WO6/rectorite composite catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A Visible Light Responsive Nano-Bi 2 WO 6 The preparation method of / rectorite composite catalyst, it comprises the steps:

[0024] 1) Take by weighing 5.6738g citric acid, be dissolved in the deionized water of 300mL, be mixed with citric acid solution, standby; Take by weighing 0.8086g (NH 4 ) 6 W 7 o 24 ·6H 2 O, dissolved in 390mL deionized water, prepared as (NH 4 ) 6 W 7 o 24 Solution, standby; Weigh 2.9104g of Bi(NO 3 ) 3 ·5H 2 O (the molar ratio of Bi ions to citric acid is 1:3), was added to the citric acid solution prepared above, and then stirred at a constant temperature of 80°C to form a white precipitate and obtain a solution containing the white precipitate; Ammonium tetraacetic acid-ammonia solution (weigh 5.2604g of ethylenediaminetetraacetic acid and dissolve in 50mL of ammonia water; the molar ratio of ethylenediaminetetraacetic acid to citric acid is 2:3), slowly add dropwise to the above solution containing white precipitate , and then co...

Embodiment 2

[0031] A Visible Light Responsive Nano-Bi 2 WO 6 The preparation method of / rectorite composite catalyst, it comprises the steps:

[0032] 1) Take by weighing 5.6738g citric acid, be dissolved in the deionized water of 300mL, be mixed with citric acid solution, standby; Take by weighing 0.8086g (NH 4 ) 6 W 7 o 24 ·6H 2 O, dissolved in 390mL of deionized water, prepared as (NH 4 ) 6 W 7 o 24 Solution, standby; Weigh 2.9104g of Bi(NO 3 ) 3 ·5H 2 O (the molar ratio of Bi ions to citric acid is 1:3), was added to the citric acid solution prepared above, and then stirred at a constant temperature of 80°C to form a white precipitate and obtain a solution containing the white precipitate; Ammonium tetraacetic acid-ammonia solution (weigh 5.2604g of ethylenediaminetetraacetic acid and dissolve in 50mL of ammonia water; the molar ratio of ethylenediaminetetraacetic acid to citric acid is 2:3), slowly add dropwise to the above solution containing white precipitate , and then...

Embodiment 3

[0038] A Visible Light Responsive Nano-Bi 2 WO 6 The preparation method of / rectorite composite catalyst, it comprises the steps:

[0039] 1) Take by weighing 5.6738g citric acid, be dissolved in the deionized water of 300mL, be mixed with citric acid solution, standby; Take by weighing 0.8086g (NH 4 ) 6 W 7 o 24 ·6H 2 O, dissolved in 390mL of deionized water, prepared as (NH 4 ) 6 W 7 o 24 Solution, standby; Weigh 2.9104g of Bi(NO 3 ) 3 ·5H 2 O (the molar ratio of Bi ions to citric acid is 1:3), was added to the citric acid solution prepared above, and then stirred at a constant temperature of 80°C to form a white precipitate and obtain a solution containing the white precipitate; Ammonium tetraacetic acid-ammonia solution (weigh 5.2604g of ethylenediaminetetraacetic acid and dissolve in 50mL of ammonia water; the molar ratio of ethylenediaminetetraacetic acid to citric acid is 2:3), slowly add dropwise to the above solution containing white precipitate , and then...

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Abstract

The invention relates to a preparation method of a nanometer composite catalyst which is used for photocatalytic water treatment and is responsive to visible light. The preparation method of a nanometer Bi2WO6 / rectorite composite catalyst is characterized in that the method comprises the following steps: 1) preparing a citric acid solution; preparing a (NH4)6W7O24 solution; weighing Bi(NO3)3.5H2O, adding into the prepared citric acid solution, stirring at a constant temperature to form a white precipitate; dropwisely adding an ethylenediaminetetraacetic acid-ammonia solution into the solutioncontaining the white precipitate, adding the (NH4)6W7O24 solution, stirring to form a precursor solution; 2) preparing a sodium-based rectorite suspension liquid; 3) dropwisely adding the precursor solution into the sodium-based rectorite suspension liquid, stirring, and drying; 4) coking, cooling and grinding; roasting to obtain the nanometer Bi2WO6 / rectorite composite catalyst which is responsive to visible light. The preparation method has low cost, is simple and practical, and is easy to control; the prepared composite catalyst has the advantages of strong adsorbability, high visible-light activity, etc.

Description

technical field [0001] The invention relates to a preparation method of a visible light-responsive nanocomposite catalyst used for photocatalytic water treatment, belonging to the fields of nanomaterials and environmental purification. Background technique [0002] In recent years, with the increasingly serious environmental pollution problems and the enhancement of people's awareness of environmental protection, photocatalytic materials have become a hot spot in the research of catalytic science. Among them, TiO 2 Semiconductor photocatalysts have attracted much attention because of their stable chemical properties, strong oxidizing properties, insoluble, non-toxic, and low cost. However, due to TiO 2 The higher requirements for excitation light energy (<380nm), and the wider energy gap (Eg=3.0-3.2eV) determine that its light absorption threshold is limited to the ultraviolet region, so the utilization rate of sunlight is low, which further limits its practical applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/31B01J35/10B01J20/10C02F1/30
Inventor 张高科郭亚丹甘慧慧
Owner WUHAN UNIV OF TECH
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