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Protonated g-C3N4/BiOBr heterojunction photocatalyst and preparation method

A photocatalyst, g-c3n4 technology, applied in the field of photocatalytic materials, achieves the effects of high removal efficiency, good application prospects and strong operability

Inactive Publication Date: 2018-12-28
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported in the literature that protonated g-C 3 N 4 / BiOBr heterojunction structure, but there is no research on g-C with flower globular protonation 3 N 4 / Reported by BiOBr

Method used

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  • Protonated g-C3N4/BiOBr heterojunction photocatalyst and preparation method
  • Protonated g-C3N4/BiOBr heterojunction photocatalyst and preparation method
  • Protonated g-C3N4/BiOBr heterojunction photocatalyst and preparation method

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preparation example Construction

[0035] The preparation method of the present invention comprises the following steps:

[0036] 1) Protonated g-C 3 N 4 Preparation: add g-C 3 N 4 The precursor is moved into a semi-closed alumina crucible, placed in a muffle furnace and calcined by air to obtain g-C 3 N4 Photocatalyst particles. Weigh g-C 3 N 4 Photocatalyst particles are dispersed in hydrochloric acid solution, stirred at room temperature for 3-5 hours, washed with deionized water until neutral, and the light yellow g-C 3 N 4 The photocatalyst particles were dried in an oven to obtain protonated g-C 3 N 4 catalyst of light.

[0037] 2) Curd-like protonated g-C in response to visible light 3 N 4 / BiOBr heterojunction photocatalyst preparation: Weighing protonated g-C 3 N 4 Dissolve photocatalyst and bismuth nitrate in 100mL deionized water, add 9mL acetic acid solution during stirring, after stirring at room temperature, add potassium bromide and 3mmol sodium acetate to the solution, continue sti...

Embodiment 1

[0050] Step 1: Put g-C 3 N 4 The precursor (melamine) is moved into a semi-closed alumina crucible, placed in a muffle furnace and calcined by air to obtain g-C 3 N 4 Photocatalyst particles. Weigh 3g g-C 3 N 4 Disperse photocatalyst particles in 60mL hydrochloric acid solution, stir at room temperature for 3-5h, then wash with deionized water until neutral, the light yellow g-C 3 N 4 The photocatalyst particles were dried in an oven to obtain protonated g-C 3 N 4 catalyst of light.

[0051] Step 2: Weigh 0.03g of protonated g-C 3 N 4 Dissolve photocatalyst and 4.78g bismuth nitrate in 100mL deionized water, add 9mL acetic acid solution during stirring, after stirring at room temperature, add 1.17g potassium bromide and 3mmol sodium acetate to the solution, continue to stir for 2 hours, then carry out aging After reacting for 1 hour, the resulting precipitate was washed three times with deionized water and absolute ethanol, and then centrifuged and dried to obtain t...

Embodiment 2

[0053] Step 1: Put g-C 3 N 4 The precursor (urea) was moved into a semi-closed alumina crucible, placed in a muffle furnace and calcined by air to obtain g-C 3 N 4 Photocatalyst particles. Weigh 3g g-C 3 N 4 Disperse photocatalyst particles in 60mL hydrochloric acid solution, stir at room temperature for 3-5h, then wash with deionized water until neutral, the light yellow g-C 3 N 4 The photocatalyst particles were dried in an oven to obtain protonated g-C 3 N 4 catalyst of light.

[0054] Step 2: Weigh 0.1 g of protonated g-C 3 N 4 Dissolve photocatalyst and 3.19g bismuth nitrate in 100mL deionized water, add 9mL acetic acid solution during stirring, after stirring at room temperature, add 0.78g potassium bromide and 3mmol sodium acetate to the solution, continue stirring for 2 hours, then carry out aging After reacting for 1 hour, the resulting precipitate was washed three times with deionized water and absolute ethanol, and then centrifuged and dried to obtain the...

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Abstract

A protonated g-C3N4 / BiOBr heterojunction photocatalyst is flower-like particles consisting of flower-like BiOBr and flaky g-C3N4 growing on the flow-like BiOBr in situ. The photocatalyst is prepared with the following method: 1) calcining a precursor of g-C3N4 in air to obtain g-C3N4 photocatalyst particles; 2) dispersing the g-C3N4 photocatalyst particles in a hydrochloric acid solution, stirringthe solution at the normal temperature, and washing the g-C3N4 photocatalyst particles with deionized water to be neutral; 3) drying the g-C3N4 photocatalyst particles in the step 2 to obtain a protonated g-C3N4 photocatalyst; 4) dissolving the protonated g-C3N4 photocatalyst and bismuth nitrate in water, adding an acetate solution after stirring, adding potassium bromide and sodium acetate afterstirring at the room temperature, conducting an aging reaction after stirring, washing an obtained precipitate with water and absolute ethyl alcohol respectively, and then, performing centrifugationand drying to obtain the protonated g-C3N4 / BiOBr heterojunction photocatalyst. The invention further discloses a preparation method of the catalyst.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a protonated g-C in flower-shaped visible light response 3 N 4 / BiOBr heterojunction photocatalyst. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. Background technique [0003] In recent years, with the development of society, PPCPs (that is, drugs and personal care products) have continuously entered human daily life, and the use of PPCPs has increased, and they have entered the water cycle through various channels, causing pollution to the water environment. serious threat to plant, animal and human health. Traditional methods are difficult to effectively degrade, how to effectively remove the pollution of PPCPs in water has become a problem to be solved in the 21st century. Heterogeneous photocatalytic oxidation technology has been widely used in environmental governance due to its simplicity, low cons...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/03B01J35/02C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/24B01J37/031C02F2305/10C02F2101/34C02F2101/38B01J35/50B01J35/39
Inventor 王丽君梁兰兰高生旺夏训峰朱建超香宝刘阳程成
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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