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High-activity phosphor-doped bismuth vanadate photocatalyst, preparation method and applications thereof

A technology of photocatalyst and highly active phosphorus, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of not giving the specific conditions of the catalyst, and not investigating the application research of the catalyst, so as to achieve high-efficiency photocatalysis The effect of activity, low cost and simple process

Inactive Publication Date: 2015-06-17
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For phosphorus-modified bismuth vanadate, Jo et al {Angew. Chem. Int. Ed.,51(2012) 3147} prepared phosphate-doped monoclinic scheelite-type BiVO by urea precipitation method 4 To improve the activity of photoelectrochemical oxidation of water, the improvement of photocatalytic activity is due to the incorporation of phosphate into monoclinic scheelite-type BiVO 4 They promoted the separation of photogenerated electrons and hole pairs, but they did not give the specific conditions for the preparation of the catalyst, nor did they investigate the application of the catalyst to the degradation of organic pollutants in industrial wastewater.

Method used

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  • High-activity phosphor-doped bismuth vanadate photocatalyst, preparation method and applications thereof
  • High-activity phosphor-doped bismuth vanadate photocatalyst, preparation method and applications thereof
  • High-activity phosphor-doped bismuth vanadate photocatalyst, preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Weigh 0.8489 g of bismuth nitrate pentahydrate and dissolve it in nitric acid with a concentration of 2 mol / L to prepare a bismuth nitrate solution with a concentration of 0.025 mol / L, and then add sodium phosphate dodecahydrate and original dodecahydrate at a molar ratio of 1:19 A mixture of sodium vanadate, wherein the sum of the moles of sodium phosphate dodecahydrate and sodium orthovanadate dodecahydrate is equal to the moles of bismuth nitrate, stirred for 30 minutes, and then mixed with dilute nitric acid solution or dilute sodium hydroxide solution The pH value of the system was adjusted to 2 to obtain the precursor, and then the precursor was transferred to an autoclave with a filling degree of 75% to 80%. The autoclave was hydrothermally treated at 180°C for 48 hours, and after natural cooling to room temperature, the The precipitate obtained in the autoclave was first washed 10 times with deionized water, then washed 3 times with absolute ethanol, and then dri...

Embodiment 2

[0030]Weigh 0.8489 g of bismuth nitrate pentahydrate and dissolve it in nitric acid with a concentration of 2 mol / L to prepare a bismuth nitrate solution with a concentration of 0.025 mol / L, then add sodium phosphate dodecahydrate and prododecahydrate at a molar ratio of 1:199 A mixture of sodium vanadate, wherein the sum of the moles of sodium phosphate dodecahydrate and sodium orthovanadate dodecahydrate is equal to the moles of bismuth nitrate, stirred for 30 minutes, and then mixed with dilute nitric acid solution or dilute sodium hydroxide solution The pH value of the system was adjusted to 2 to obtain the precursor, and then the precursor was transferred to an autoclave with a filling degree of 75% to 80%. The autoclave was hydrothermally treated at 180°C for 48 hours, and after natural cooling to room temperature, the The precipitate obtained in the autoclave was first washed 10 times with deionized water, then washed 3 times with absolute ethanol, and then dried in an o...

Embodiment 3

[0032] Weigh 0.8489 g of bismuth nitrate pentahydrate and dissolve it in nitric acid with a concentration of 2 mol / L to prepare a bismuth nitrate solution with a concentration of 0.025 mol / L, then add sodium phosphate dodecahydrate and prododecahydrate at a molar ratio of 1:99 A mixture of sodium vanadate, wherein the sum of the moles of sodium phosphate dodecahydrate and sodium orthovanadate dodecahydrate is equal to the moles of bismuth nitrate, stirred for 30 minutes, and then mixed with dilute nitric acid solution or dilute sodium hydroxide solution The pH value of the system was adjusted to 2 to obtain the precursor, and then the precursor was transferred to an autoclave with a filling degree of 75% to 80%. The autoclave was hydrothermally treated at 180°C for 48 hours, and after natural cooling to room temperature, the The precipitate obtained in the autoclave was first washed 10 times with deionized water, then washed 3 times with absolute ethanol, and then dried in an o...

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Abstract

The invention discloses a high-activity phosphor-doped bismuth vanadate photocatalyst, a preparation method and applications thereof. The preparation method comprises the following steps: adding a mixture of a phosphor source and a vanadium source into a bismuth nitrate solution, wherein the mole number of the phosphor source is equal to the mole number of the vanadium source; stirring, then adjusting the pH of the system to a range of 1.5 to 7 so as to obtain a precursor; then transferring the precursor to a high-pressure reactor to carry out hydrothermal reactions, filtering and washing the reaction products after the reactions, and drying and grinding so as to obtain the high-activity phosphor-doped bismuth vanadate photocatalyst. The preparation method has the advantages of low cost and simple technology and is suitable for industrial production. The prepared high-activity phosphor-doped bismuth vanadate photocatalyst has a high-efficient photocatalytic activity under simulated sunlight and good application prospect in the fields of environment protection, solar energy conversion, catalysis, photoelectrical equipment, and the like.

Description

technical field [0001] The invention relates to a highly active phosphorus-doped bismuth vanadate photocatalyst and its preparation method and application. The prepared monoclinic scheelite-type catalyst has high-efficiency photocatalytic activity under simulated sunlight and can be used for industrial wastewater The degradation of organic pollutants in medium belongs to the field of new catalyst materials. Background technique [0002] Photocatalysis research involves hot research fields such as energy, materials and environment. Among them, the semiconductor photocatalytic material BiVO 4 Due to its stable properties, wide spectral response range, strong redox ability, and cheap and easy to obtain, it has attracted widespread attention. However, due to the monoclinic scheelite-type BiVO 4 The existence of photogenerated electrons and hole pairs in photocatalytic materials is easy to recombine, which leads to the reduction of their photocatalytic activity. Therefore, the ...

Claims

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Application Information

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IPC IPC(8): B01J27/198B01D53/86B01D53/72C02F1/30C02F1/58
CPCY02W10/37
Inventor 刘伟赵国升姜大雨王丽常立民
Owner JILIN NORMAL UNIV
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