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Bismuth/graphite phase carbon nitride/bismuthyl bromate composite photocatalyst as well as preparation method and application thereof

A technology of composite light and catalyst, used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as constraints, limitations, high prices, etc. Aids in absorption and utilization

Active Publication Date: 2021-02-09
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the noble metal pair g-C 3 N 4 Surface modification can greatly improve its photocatalytic performance and form plasmonic photocatalytic materials, but the existing plasmonic metal nanoparticles are mostly limited to noble metals such as Au, Ag, Pt, etc., and their practical applications are restricted by high prices.

Method used

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  • Bismuth/graphite phase carbon nitride/bismuthyl bromate composite photocatalyst as well as preparation method and application thereof
  • Bismuth/graphite phase carbon nitride/bismuthyl bromate composite photocatalyst as well as preparation method and application thereof
  • Bismuth/graphite phase carbon nitride/bismuthyl bromate composite photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A Bi / g-C 3 N 4 / BiOBrO 3 The preparation method of composite photocatalyst comprises the steps:

[0036] S1, Bi(NO 3 ) 3 ·5H 2 O and KBrO 3 Dissolve in deionized water, stir evenly, place in a high-pressure reactor, react at 160°C for 12 hours, separate, wash, and dry to obtain BiOBrO 3 powder;

[0037] 0.5g of BiOBrO 3 powder and 0.25g of g-C 3 N 4 Add the powder into 60ml of absolute ethanol, place it in an oven at 160°C for 8 hours, separate the precipitate, wash it, and dry it to obtain g-C 3 N 4 / BiOBrO 3 heterostructure;

[0038] S2, take 0.276g of bismuth nitrate, put it into a 50mL three-hole flask containing 25mL of ethylene glycol, stir for 15min, add 0.1g of NaOH and 0.276g of PVP and stir to dissolve to obtain a suspension, heat from room temperature to 190°C and Keep the reaction for 1 h, and pass N through the whole reaction process. 2 As a protective gas, after the reaction, cool to room temperature, centrifuge at 2000rpm for 30min, and was...

Embodiment 2

[0041] A Bi / g-C 3 N 4 / BiOBrO 3 The preparation method of composite photocatalyst comprises the steps:

[0042] S1, Bi(NO 3 ) 3 ·5H 2 O and KBrO 3 Dissolve in deionized water, stir evenly, place in a high-pressure reactor, react at 150°C for 14h, separate, wash, and dry to obtain BiOBrO 3 powder;

[0043] 0.5g of BiOBrO 3 powder and 0.25g of g-C 3 N 4 Add the powder into 60ml of absolute ethanol, place it in an oven at 150°C for 9 hours, separate the precipitate, wash it, and dry it to obtain g-C 3 N 4 / BiOBrO 3 heterostructure;

[0044] S2, take 0.276g of bismuth nitrate, put it into a 50mL three-hole flask containing 30mL of ethylene glycol, stir for 15min, add 0.1g of NaOH and 0.276g of PVP and stir to dissolve to obtain a suspension, heat from room temperature to 180°C and Keep the reaction for 1.5h, and pass N through the whole reaction process 2 As a protective gas, after the reaction, cool to room temperature, centrifuge and wash to obtain the final produ...

Embodiment 3

[0047] A Bi / g-C 3 N 4 / BiOBrO 3 The preparation method of composite photocatalyst comprises the steps:

[0048] S1, Bi(NO 3 ) 3 ·5H 2 O and KBrO 3 Dissolve in deionized water, stir evenly, place in a high-pressure reactor, react at 170°C for 10h, separate, wash, and dry to obtain BiOBrO 3 powder;

[0049] 0.5g of BiOBrO 3 powder and 0.5g of g-C 3 N 4 Add the powder into 60ml of absolute ethanol, place it in an oven at 170°C for 7 hours, separate the precipitate, wash it, and dry it to obtain g-C 3 N 4 / BiOBrO 3 heterostructure;

[0050] S2, take 0.118g of bismuth nitrate, put it into a 50mL three-hole flask containing 20mL of ethylene glycol, stir for 15min, add 0.1g of NaOH and 0.118g of PVP and stir to dissolve to obtain a suspension, heat from room temperature to 200°C and Keep the reaction for 0.5h, and pass N through the whole reaction process 2 As a protective gas, after the reaction, cool to room temperature, centrifuge and wash to obtain the final produc...

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Abstract

The invention relates to the technical field of photocatalysts, and particularly discloses a Bi / g-C3N4 / BiOBrO3 composite photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding g-C3N4 powder and BiOBrO3 powder in a mass ratio of (1: 1)-(1: 5) into absolute ethyl alcohol, performing reacting, separating out precipitates, and performing washing and drying to obtain a g-C3N4 / BiOBrO3 heterostructure; adding Bi nanoparticles and g-C3N4 / BiOBrO3 heterostructure powder in a mass ratio of (1: 1)-(1: 15) into absolute ethyl alcohol, carrying out ultrasonic reaction, separating precipitates, and performing washing, drying and grinding to obtain the Bi / g-C3N4 / BiOBrO3 composite photocatalyst. The Bi / g-C3N4 / BiOBrO3 composite photocatalyst provided by the invention can fully utilize visible light, has good photon-generated carrier separation efficiency, ensures strong oxidation-reduction activity of the catalyst, and can efficiently degrade pollutants.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a Bi / g-C 3 N 4 / BiOBrO 3 Composite photocatalyst and its preparation method and application. Background technique [0002] Graphite phase g-C 3 N 4 It is a typical new type of metal-free polymer semiconductor. As a metal-free visible light catalyst, it has received extensive attention in the fields of solar energy conversion and environmental governance due to its unique structure and performance. But pure g-C 3 N 4 It also has the disadvantages of small specific surface area and high recombination rate of photogenerated carriers after illumination. [0003] Although bismuth oxides and graphite phase g-C 3 N 4 Having a matching valence conduction band position can meet the prerequisites for forming a heterojunction. The combination of the two helps to reduce the defects of the high recombination rate of photogenerated carriers in both pure substances, but when the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/34B01J37/10B01D53/86B01D53/72C02F1/30C02F1/72C02F101/34
CPCB01J27/24B01J37/343B01J37/0036B01J37/10B01D53/8668C02F1/30C02F1/725B01D2258/06B01D2257/708C02F2101/34C02F2101/40C02F2101/301B01J35/39Y02W10/37
Inventor 肖凤娟李红丽孔龙飞张华琳赵东李君李梦雅张雪菲闫璐王猛张凯文杨涵段玉梅田智仁王世贸张广田付士峰吴湘峰杜永刚宗倩颖
Owner SHIJIAZHUANG TIEDAO UNIV
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