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Manufacturing method for magnetic photocatalyst coating

A technology of photocatalyst and production method, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve low quantum efficiency, limited applications, and poor utilization of visible light Advanced problems, to achieve the effect of easy preparation method, good visible light response and good photocatalytic activity

Inactive Publication Date: 2015-08-05
刘泽华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pure phase Bi 2 WO 6 In addition to its low quantum efficiency, its application in photocatalysis is limited because of its low utilization rate of visible light (about λ<400nm).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of magnetic photocatalyst coating is characterized in that, comprises the steps:

[0019] (1) Na 2 WO 4 The solution was added to the Bi(NO 3 ) 3 solution, where Bi 3+ and WO 4 2- The concentration ratio is 3:1, and at room temperature, the temperature is controlled at 50°C for 3 hours;

[0020] (2) Mix nano-titanium dioxide and attapulgite clay with a mass ratio of 2:5, add a mixture of ferric nitrate and strontium nitrate with a molar ratio of 1:2, add water to dissolve, and stir with a high-speed mixer at a speed of 500r / min for 30min;

[0021] (3) Mix the mixture of the previous two steps, add 0.3% tetraethoxysilane coupling agent, adjust the pH=7-8 with NaOH solution, then transfer to the reaction kettle, control the temperature at 160°C, and heat Reaction 6h;

[0022] (4) Wash the product obtained above with distilled water and absolute ethanol, and dry at 60°C to obtain magnetic bismuth tungstate powder;

[0023] (5) Compos...

Embodiment 2

[0025] A kind of preparation method of magnetic photocatalyst coating is characterized in that, comprises the steps:

[0026] (1) Na 2 WO 4 The solution was added to the Bi(NO 3 ) 3 solution, where Bi 3+ and WO 4 2- The concentration ratio is 3:1, and at room temperature, the temperature is controlled at 55°C for 2.5 hours;

[0027] (2) Mix nano-titanium dioxide and attapulgite clay with a mass ratio of 2:5, add a mixture of ferric nitrate and strontium nitrate with a molar ratio of 1:2, add water to dissolve, and stir with a high-speed mixer at a speed of 500r / min for 30min;

[0028] (3) Mix the mixture of the previous two steps, add 0.4% tetraethoxysilane coupling agent, adjust the pH=7-8 with NaOH solution, then transfer to the reaction kettle, control the temperature at 165°C, and heat Reaction 5.5h;

[0029] (4) Wash the product obtained above with distilled water and absolute ethanol, and dry at 60°C to obtain magnetic bismuth tungstate powder;

[0030] (5) Co...

Embodiment 3

[0032] A kind of preparation method of magnetic photocatalyst coating is characterized in that, comprises the steps:

[0033] (1) Na 2 WO 4 The solution was added to the Bi(NO 3 ) 3 solution, where Bi 3+ and WO 4 2- The concentration ratio is 3:1, and at room temperature, the temperature is controlled at 60°C for 2 hours;

[0034] (2) Mix nano-titanium dioxide and attapulgite clay with a mass ratio of 2:5, add a mixture of ferric nitrate and strontium nitrate with a molar ratio of 1:2, add water to dissolve, and stir with a high-speed mixer at a speed of 500r / min for 30min;

[0035] (3) Mix the mixture of the previous two steps, add 0.5% tetraethoxysilane coupling agent, adjust the pH=7-8 with NaOH solution, then transfer to the reaction kettle, control the temperature at 170°C, and heat Reaction 5h;

[0036] (4) Wash the product obtained above with distilled water and absolute ethanol, and dry at 60°C to obtain magnetic bismuth tungstate powder;

[0037] (5) Compos...

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PUM

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Abstract

The invention discloses a manufacturing method for a magnetic photocatalyst coating. The method is characterized by comprising the following steps: (1) adding a Na2WO4 solution into a Bi(NO3)3 solution and carrying out reaction; (2) weighing nanometer titanium dioxide and attapulgite clay by a mass ratio of 2: 5, then carrying out mixing, adding a mixture of ferric nitrate and strontium nitrate with a mol ratio of 1: 2, and carrying out reaction; (3) mixing the mixed solutions obtained in the above two steps, then adding a polymeric dispersant, regulating pH value in a range of 7 to 8, and carrying out hydrothermal reaction for 5 to 6 hours; (4) carrying out washing so as to prepare magnetic bismuth tungstate powder; and (5) compounding the magnetic bismuth tungstate powder with polyaniline according to the mass ratio of 4% to 5%. The manufacturing method for magnetic photocatalyst coating is simple and easily-available in raw materials, is easy to operate and has no requirements on pressure of reaction system; the prepared magnetic photocatalyst coating has good photocatalytic activity; and the magnetic photocatalyst obtained from combining of magnetic substances composed of ferric nitrate and strontium nitrate with a catalyst has good visible-light response.

Description

technical field [0001] The invention belongs to the technical field of preparation of composite functional materials, and in particular relates to a preparation method of a magnetic photocatalyst coating. Background technique [0002] Since the discovery of TiO 2 Since it can photolyze water and degrade organic pollutants under ultraviolet radiation, some new non-TiO 2 Photocatalysts have been developed successively, such as photocatalysts such as perovskite type, vanadium subgroup composite oxides and bismuth compounds. However, for most photocatalysts, they have low quantum efficiencies under visible light, and the photocatalytic technology used still cannot meet the needs of dealing with environmental pollution. Semiconductor materials such as tungstate have good application prospects because of their unique structure and physical and chemical properties. [0003] In recent years, magnetic substances and catalysts have been combined to form magnetically loaded photoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D179/02B01J23/888
Inventor 刘泽华
Owner 刘泽华