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Bismuthyl bromide/bismuth molybdate heterojunction photocatalyst as well as preparation method and application thereof

A technology of bismuth oxybromide and photocatalyst, which is applied in the field of photocatalytic materials, can solve the problems of low quantum yield and visible light absorption utilization rate, etc., and achieves the effects of great development and application prospects, good degradation effect, and simple preparation process.

Inactive Publication Date: 2017-06-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bismuth molybdate (Bi 2 MoO 6 ) is a catalyst with photocatalytic activity under visible light irradiation, but it is still restricted by low quantum yield and visible light absorption utilization in practical applications.

Method used

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  • Bismuthyl bromide/bismuth molybdate heterojunction photocatalyst as well as preparation method and application thereof
  • Bismuthyl bromide/bismuth molybdate heterojunction photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of Bi by solvothermal method 2 MoO 6 Microspheres: 2mmol Bi(NO 3 ) 3 ·5H 2 O and 1 mmol Na 2 MoO 4 2H 2 Dissolve O in 5mL of ethylene glycol respectively, mix the two evenly under magnetic stirring at a speed of 500r / min, and slowly add 20mL of absolute ethanol, stir at room temperature for 30min at a speed of 500r / min, pour Put it into a 50mL closed reaction kettle, react at 160°C for 12h, wash the obtained product three times with absolute ethanol and deionized water, and dry it in a vacuum oven at 60°C for 12h to obtain Bi 2 MoO 6 Microspheres;

[0034] (2) Take 1g Bi from step (1) 2 MoO 6 Ultrasonic dispersion in 10mL of deionized water under the condition of P=100W to obtain a dispersion; 0.1591g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20mL of ethylene glycol and added to the dispersion, and mixed to obtain a mixed dispersion;

[0035] (3) Dissolve 0.1195g CTAB in 20mL ethylene glycol to obtain a CTAB ethylene glycol solution; slowly add ...

Embodiment 2

[0037] (1) Preparation of Bi by solvothermal method 2 MoO 6 Microspheres: 2mmol Bi(NO 3 ) 3 ·5H 2 O and 1 mmol Na 2 MoO 4 2H 2 Dissolve O in 5mL of ethylene glycol respectively, mix the two evenly under magnetic stirring at a speed of 500r / min, and slowly add 20mL of absolute ethanol, stir at room temperature for 30min at a speed of 500r / min, pour Put it into a 50mL closed reaction kettle, react at 160°C for 12h, wash the obtained product three times with absolute ethanol and deionized water, and dry it in a vacuum oven at 60°C for 12h to obtain Bi 2 MoO 6 Microspheres;

[0038] (2) Take 1g Bi from step (1) 2 MoO 6 Ultrasonic dispersion in 10mL of deionized water under the condition of P=100W to obtain a dispersion; 0.2387g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20mL of ethylene glycol and added to the dispersion, and mixed to obtain a mixed dispersion;

[0039] (3) Dissolve 0.1793g CTAB in 20mL ethylene glycol to obtain a CTAB ethylene glycol solution; slowly add ...

Embodiment 3

[0041] (1) Preparation of Bi by solvothermal method 2 MoO 6 Microspheres: 2mmol Bi(NO 3 ) 3 ·5H 2 O and 1 mmol Na 2 MoO 4 2H 2 O was respectively dissolved in 5 mL of ethylene glycol, and the two were mixed evenly under magnetic stirring at a speed of 500 r / min, and 20 mL of dehydrated ethanol was slowly added, and after stirring for 30 min at a speed of 500 r / min at room temperature, Pour it into a 50mL closed reaction kettle, react at 160°C for 12h, wash the obtained product three times with absolute ethanol and deionized water, and dry it in a vacuum oven at 60°C for 12h to obtain Bi 2 MoO 6 Microspheres;

[0042] (2) Take 1g Bi from step (1) 2 MoO 6 Ultrasonic dispersion in 10mL of deionized water under P=100W conditions, to obtain a dispersion; 0.3182g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 20mL of ethylene glycol and added to the dispersion, and mixed evenly to obtain a mixed dispersion;

[0043] (3) Dissolve 0.2391g CTAB in 20mL ethylene glycol to obtain a C...

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Abstract

The invention belongs to the technical field of photocatalytic materials and discloses a bismuthyl bromide / bismuth molybdate heterojunction photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing Bi2MoO6 microspheres by virtue of a solvothermal method; (2) dispersing the Bi2MoO6 microspheres into water to form Bi2MoO6 water dispersion liquid, slowly adding a Bi(NO3)3 glycol solution into the Bi2MoO6 water dispersion liquid, and uniformly stirring, so as to obtain mixed dispersion liquid; and (3) slowly adding cetyltrimethyl ammonium bromide ethylene glycol into the mixed dispersion liquid, stirring to react at room temperature, carrying out stir-free reaction at a high temperature, washing, and drying, so as to obtain the bismuthyl bromide / bismuth molybdate heterojunction photocatalyst. The photocatalyst has high photocatalytic activity and good stability; the preparation method is simple and suitable for batch production; and the photocatalyst is applied to photocatalytic degradation of organic pollutants such as rhodamine B.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a bismuth oxybromide / bismuth molybdate (BiOBr / BiOBr) responsive to visible light. 2 MoO 6 ) heterojunction photocatalyst and its preparation and application. Background technique [0002] Research and development of highly efficient photocatalysts with visible light response is an important research topic in the field of photocatalysis. Among them, semiconductor photocatalysis is an effective way to degrade pollutants and has been extensively studied in recent years. Bismuth molybdate (Bi 2 MoO 6 ) is a catalyst with photocatalytic activity under visible light irradiation, but it is still restricted by low quantum yield and visible light absorption utilization in practical applications. In order to further increase Bi 2 MoO 6 Researchers have done a lot of exploration work, including designing reasonable structural properties, doping, and synthesizing bism...

Claims

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Application Information

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IPC IPC(8): B01J27/132C02F1/30C02F101/30C02F101/38C02F101/34C02F101/36
CPCC02F1/30B01J23/002B01J27/132C02F2101/30C02F2101/38C02F2101/36C02F2101/34C02F2305/10B01J35/39
Inventor 牛晓君安少荣杨佳
Owner SOUTH CHINA UNIV OF TECH
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