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a nano w 0.4 mo 0.6 o 3 Preparation method of high-performance photocatalyst

A photocatalyst and high-performance technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of less research on tungsten-molybdenum double metal oxides and complex processes, and achieve improved Photocatalytic activity, simple preparation method, and easy-to-achieve effects

Active Publication Date: 2018-02-23
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are few studies on tungsten-molybdenum double metal oxides, because the process is mostly complicated

Method used

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  • a nano w <sub>0.4</sub> mo <sub>0.6</sub> o <sub>3</sub> Preparation method of high-performance photocatalyst
  • a nano w <sub>0.4</sub> mo <sub>0.6</sub> o <sub>3</sub> Preparation method of high-performance photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Prepare 0.5mol / L of C 6 h 12 o 6 ·H 2 O (glucose) distilled water, 0.2mol / L Na 2 WO 4 2H 2 O distilled water, 0.2mol / L Na 2 MoO 4 2H 2 O distilled aqueous solution and 0.01mol / L polyoxyethylene fatty alcohol ether distilled aqueous solution.

[0023] 2) Dilute the above solution in molar ratio C 6 h 12 o 6 ·H 2 O:Na 2 WO 4 2H 2 O:Na 2 MoO 4 2H 2O=2:1:1 ratio mixed, stirred at 40°C for 30min to obtain a mixed solution. Then add polyoxyethylene fatty alcohol ether distilled aqueous solution to the mixed solution, and stir at 40 for 20 minutes. Wherein, the volume of the polyoxyethylene fatty alcohol ether distilled aqueous solution is 1% of the volume of the mixed solution.

[0024] 3) Adjust the pH to 1 with hydrochloric acid with a concentration of 2 mol / L.

[0025] 4) Then pour it into a polytetrafluoroethylene-lined high-pressure hydrothermal reactor, keeping the volume filling ratio at 50%.

[0026] 5) Put the sealed reaction kettle into a ho...

Embodiment 2

[0032] 1) Prepare 0.8mol / L of C 6 h 12 o 6 ·H 2 O distilled water, 0.5mol / L Na 2 WO 4 2H 2 O distilled water, 0.5mol / L Na 2 MoO 4 2H 2 O distilled aqueous solution and 0.03mol / L polyoxyethylene fatty alcohol ether distilled aqueous solution.

[0033] 2) Dilute the above solution in molar ratio C 6 h 12 o 6 ·H 2 O:Na 2 WO 4 2H 2 O:Na 2 MoO 4 2H 2 O=3:1:1 ratio mixed, stirred at 45°C for 25min to obtain a mixed solution. Then, distilled aqueous solution of polyoxyethylene fatty alcohol ether was added to the mixed solution, and stirred at 45° C. for 15 minutes. Wherein, the volume of polyoxyethylene fatty alcohol ether distilled aqueous solution is 1.5% of the mixed solution volume.

[0034] 3) Adjust the pH to 1.5 with hydrochloric acid with a concentration of 2 mol / L.

[0035] 4) Then pour it into a polytetrafluoroethylene-lined high-pressure hydrothermal reactor, keeping the volume filling ratio at 60%.

[0036] 5) Put the sealed reactor into a homogeneo...

Embodiment 3

[0040] 1) Prepare 1mol / L of C 6 h 12 o 6 ·H 2 O distilled water, 0.8mol / L Na 2 WO 4 2H 2 O distilled water, 0.8mol / L Na 2 MoO 4 2H 2 O distilled aqueous solution and 0.05mol / L polyoxyethylene fatty alcohol ether distilled aqueous solution.

[0041] 2) Dilute the above solution in molar ratio C 6 h 12 o 6 ·H 2 O:Na 2 WO 4 2H 2 O:Na 2 MoO 4 2H 2 O=4:1:1 ratio mixed, stirred at 50°C for 20min to obtain a mixed solution. Then add polyoxyethylene fatty alcohol ether distilled aqueous solution to the mixed solution, and stir at 50° C. for 10 min. Wherein, the volume of polyoxyethylene fatty alcohol ether distilled aqueous solution is 2% of the mixed solution volume.

[0042] 3) Adjust pH=2 with hydrochloric acid with a concentration of 3 mol / L.

[0043] 4) Then pour it into a polytetrafluoroethylene-lined high-pressure hydrothermal reactor, keeping the volume filling ratio at 70%.

[0044] 5) Put the sealed reaction kettle into a homogeneous hydrothermal reacto...

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Abstract

The invention discloses a preparation method of a high-performance nano W0.4Mo0.6O3 photocatalyst. The preparation method comprises the following steps: uniformly mixing a C6H12O6.H2O aqueous solution, a Na2WO4.2H2O aqueous solution and a Na2MoO4.2H2O aqueous solution to obtain a solution mixture, adding a polyoxyethylene alcohol ether aqueous solution into the solution mixture, uniformly stirring, regulating the pH value to 1-2, performing hydrothermal reaction at 120-180 DEG C for 5-15 hours, performing aftertreatment to obtain powder, and removing carbon from the powder, thereby obtaining the high-performance nano W0.4Mo0.6O3 photocatalyst. The nano W0.4Mo0.6O3 photocatalyst has a nano granule structure, and has large specific surface area, so that the contact area between the photocatalyst and organic dye is enlarged, and photo-catalytic reaction is facilitated. The preparation method is simple and convenient, and is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a nanometer W 0.4 Mo 0.6 o 3 Preparation method of high-performance photocatalyst. Background technique [0002] Both tungsten and molybdenum are molybdenum-based materials, and their ions have the same ionic radius, so tungsten trioxide (WO 3 ) and molybdenum trioxide (MoO 3 ) are well known metal oxides with similar physicochemical properties. They are all n-type semiconductor materials with the same lattice defect, and the main defect is oxygen defect. Their gas sensitivity and photocatalytic properties have been widely studied. In addition, oxides of tungsten and molybdenum have been widely used as electrochemical materials due to their unique activity in non-stoichiometric forms. [0003] W x Mo 1-x o 3 The system exhibits "displaceable" and "reconstructive" phase transitions due to hydrogen intercalation and high temperature, resulting in rearrange...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30A62D3/17A62D101/26A62D101/28
CPCA62D3/17A62D2101/26A62D2101/28B01J23/002B01J23/30B01J35/0013B01J35/004
Inventor 曹丽云李妍黄剑锋李嘉胤介燕妮姚春燕吴建鹏
Owner SHAANXI UNIV OF SCI & TECH
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