BiPO4-WO3 composite photocatalyst and preparation method thereof

A bipo4-wo3, composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low utilization rate of light, hindering application, reducing photocatalytic efficiency, etc. Achieve the effect of improving photocatalytic performance, improving separation efficiency, improving solar energy utilization and photon quantum efficiency

Inactive Publication Date: 2016-08-17
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its wide bandgap value (3.83eV), it can only absorb ultraviolet light, resulting in low light utilization rate, and the rapid recombination of photogenerated electrons and holes also greatly reduces the photocatalytic efficiency, thus hampers its application in industry
However, there is no relevant literature on BiPO 4 -WO 3 Report on Composite Photocatalyst

Method used

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  • BiPO4-WO3 composite photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Add 0.005 mol of sodium tungstate and 0.005 mol of sodium chloride into deionized water and make up to 100mL to form a mixed solution of sodium tungstate and sodium chloride. After stirring for 30 minutes, adjust the pH value of the mixed solution with hydrochloric acid 0.5, continue to stir for 30 minutes, then transfer to the hydrothermal reaction kettle, then put the hydrothermal reaction kettle into the microwave digestion instrument and react with microwave at 180 ° C for 10 minutes, after the reaction is completed, it is cooled, washed and dried to obtain WO 3 powder;

[0018] (2) Prepare 100 mL of an aqueous solution of bismuth nitrate with a molar concentration of 0.1 mol / L, and add 0.01 mol of sodium dihydrogen phosphate and 0.01 mol of WO obtained in step (1) to the aqueous solution of bismuth nitrate under stirring conditions 3 powder;

[0019] (3) Stir the mixed solution obtained in step (1) for 1 hour at room temperature, then transfer it to a hydrothe...

Embodiment 2

[0021] (1) Add 0.01mol of sodium tungstate and 0.01mol of sodium chloride into deionized water and make up to 100mL to form a mixed solution of sodium tungstate and sodium chloride. After stirring for 30 minutes, adjust the pH of the mixed solution with hydrochloric acid 0.8, continue to stir for 30 minutes, then transfer to a hydrothermal reaction kettle, then put the hydrothermal reaction kettle into a microwave digestion apparatus and react with microwave at 180°C for 20 minutes, after the reaction is completed, it is cooled, washed and dried to obtain WO 3 powder;

[0022] (2) Prepare 100 mL of bismuth nitrate aqueous solution with a molar concentration of 0.2 mol / L, add 0.02 mol of sodium dihydrogen phosphate and 0.1 mol of WO obtained in step (1) to the bismuth nitrate aqueous solution under stirring conditions 3 powder;

[0023] (3) Stir the mixed solution obtained in step (2) for 1 hour at room temperature, then transfer it to a hydrothermal reaction kettle, then put ...

Embodiment 3

[0026] (1) Add 0.02mol of sodium tungstate and 0.02mol of sodium chloride to deionized water and make up to 100mL to form a mixed solution of sodium tungstate and sodium chloride. After stirring for 30 minutes, adjust the pH value of the mixed solution with hydrochloric acid 1.0, continue to stir for 30 minutes, then transfer to a hydrothermal reaction kettle, then put the hydrothermal reaction kettle into a microwave digestion apparatus and react with microwave at 180°C for 30 minutes, after the reaction is completed, it is cooled, washed and dried to obtain WO 3 powder;

[0027] (2) Prepare 100 mL of bismuth nitrate aqueous solution with a molar concentration of 0.5 mol / L, add 0.05 mol of sodium dihydrogen phosphate and 0.5 mol of WO obtained in step (1) to the bismuth nitrate aqueous solution under stirring conditions 3 powder;

[0028] (3) Stir the mixed solution obtained in step (2) for 1 hour at room temperature, then transfer it to a hydrothermal reaction kettle, then ...

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Abstract

The invention discloses a BiPO4-WO3 composite photocatalyst and a preparation method thereof, and belongs to the technical field of inorganic environment-friendly photocatalysis materials. According to the technical scheme, the preparation method of the BiPO4-WO3 composite photocatalyst comprises the steps that 1, sodium tungstate and sodium chloride are added into deionized water according to the molar ratio of 1:1, the pH value of the mixed solution is adjusted with hydrochloric acid to range from 0.5 to 1 and transferred into a hydrothermal reaction still, the hydrothermal reaction still is placed in a microwave digestion instrument, a microwave reaction is carried out for 10 min to 30 min at the temperature of 180 DEG C, cooling, washing and drying are carried out after the reaction is finished, and WO3 powder is obtained; 2, a bismuth nitrate water solution is prepared, sodium dihydrogen phosphate and the WO3 powder are added to form a mixed solution; 3, the mixed solution obtained in the step 2 is stirred for 1 h at room temperature and then transferred into the hydrothermal reaction still, the hydrothermal reaction still is placed in the microwave digestion instrument, a microwave reaction is carried out for 10 min to 30 min at the temperature of 180 DEG C, centrifugation, washing and drying are carried out after the reaction is finished, and the BiPO4-WO3 composite photocatalyst is prepared. According to the prepared BiPO4-WO3 composite photocatalyst, the utilization rate of sunlight and photocatalytic activity are effectively increased.

Description

technical field [0001] The invention belongs to the technical field of inorganic environmental protection photocatalytic materials, in particular to a BiPO 4 -WO 3 Composite photocatalyst and preparation method thereof. Background technique [0002] In recent years, photocatalytic oxidation technology has been widely studied by scholars in the field of environmental research due to its advantages of strong ability, high efficiency and no secondary pollution. Photocatalytic oxidation technology mainly utilizes the generation of highly active and highly oxidizing hydroxyl radicals to oxidize and remove organic pollutants, so as to achieve the purpose of effectively treating sewage. [0003] Among many photocatalysts, BiPO 4 As an oxo acid salt, it has attracted much attention for its excellent photocatalytic performance since its discovery. However, due to its wide bandgap value (3.83eV), it can only absorb ultraviolet light, resulting in low light utilization rate, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/188
CPCB01J27/188B01J35/004
Inventor 刘玉民张鹏吕华
Owner HENAN NORMAL UNIV
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