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Preparation method, product and application of Bi/BiOBr/RGO composite photocatalyst

A catalyst and composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high cost of preparation methods, unfavorable large-scale production, complex processes, etc., and improve catalytic performance. , The effect of promoting multiple scattering and photocatalytic performance improvement

Active Publication Date: 2019-04-02
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its preparation method is relatively costly, time-consuming, and the process is complicated, which is not conducive to large-scale production

Method used

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  • Preparation method, product and application of Bi/BiOBr/RGO composite photocatalyst
  • Preparation method, product and application of Bi/BiOBr/RGO composite photocatalyst
  • Preparation method, product and application of Bi/BiOBr/RGO composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) dissolving the bismuth source in ethylene glycol solution to form a concentration of 0.0550mol / L bismuth salt solution;

[0037] (2) Potassium bromide is dissolved in distilled water and form concentration is 0.2mol / L potassium bromide solution;

[0038] (3) Potassium bromide solution is slowly added to the bismuth salt solution, in volume ratio, potassium bromide solution: bismuth salt solution is 1:4, continues to stir 15min, obtains potassium bromide bismuth salt mixed solution;

[0039] (4) Ultrasonic treatment of graphite oxide in distilled water, the ultrasonic power is 250W, the ultrasonic time is 30min, and the ultrasonic frequency is 40KHz, and the concentration is made into a graphene suspension of 10.3g / L;

[0040] (5) The graphene suspension of 10.3g / L is added in the potassium bromide bismuth salt mixed solution, wherein, in volume ratio, graphene oxide suspension: potassium bromide bismuth salt mixed solution is 3:5 ;Continue stirring for 30min and ca...

Embodiment 2

[0044] (1) dissolving the bismuth source in ethylene glycol solution to form a concentration of 0.0550mol / L bismuth salt solution;

[0045] (2) Potassium bromide is dissolved in distilled water and form concentration is 0.2mol / L potassium bromide solution;

[0046] (3) Potassium bromide solution is slowly added to the bismuth salt solution, in volume ratio, potassium bromide solution: bismuth salt solution is 1:4, continues to stir 30min, obtains potassium bromide bismuth salt mixed solution;

[0047] (4) Ultrasonic treatment of graphite oxide in distilled water, the ultrasonic power is 250W, the ultrasonic time is 30min, and the ultrasonic frequency is 40KHz, and the concentration is made into a graphene suspension of 31.3g / L;

[0048] (5) The graphene suspension of 31.3g / L is added in the potassium bromide bismuth salt mixed solution, wherein, in volume ratio, graphene oxide suspension: potassium bromide bismuth salt mixed solution is 3:5 ;Continue stirring for 60min and ca...

Embodiment 3

[0053] (1) dissolving the bismuth source in ethylene glycol solution to form a concentration of 0.0550mol / L bismuth salt solution;

[0054] (2) Potassium bromide is dissolved in distilled water and form concentration is 0.2mol / L potassium bromide solution;

[0055] (3) Potassium bromide solution is slowly added to the bismuth salt solution, in volume ratio, potassium bromide solution: bismuth salt solution is 1:4, continues to stir 30min, obtains potassium bromide bismuth salt mixed solution;

[0056] (4) Ultrasonic treatment of graphite oxide in distilled water, the ultrasonic power is 250W, the ultrasonic time is 30min, and the ultrasonic frequency is 40KHz, and the concentration is made into a graphene suspension of 53.0g / L;

[0057] (5) The graphene suspension of 53.0g / L is added in the potassium bromide bismuth salt mixed solution, wherein, in volume ratio, graphene oxide suspension: potassium bromide bismuth salt mixed solution is 3:5 ;Continue stirring for 60min and ca...

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Abstract

The invention discloses a preparation method, product and application of a Bi / BiOBr / RGO composite photocatalyst. The preparation method comprises the following steps: dissolving a bismuth source in anethylene glycol solution to form a bismuth salt solution; dissolving potassium bromide in distilled water to form a potassium bromide solution; slowly adding the potassium bromide solution into the bismuth salt solution to obtain a potassium bromide-bismuth salt mixed solution; carrying out ultrasonic treatment on graphite oxide in distilled water to obtain a graphene oxide suspension liquid, adding the graphene oxide suspension liquid into the potassium bromide-bismuth salt mixed solution, carrying out a solvothermal reaction, carrying out cooling to room temperature after the reaction is finished, carrying out suction filtration, collecting precipitates and carrying out washing to obtain the composite photocatalyst. According to the invention, ethylene glycol is used as a solvent and areducing agent, and the flower-like Bi / BiOBr / RGO composite photocatalyst is simply and rapidly prepared through a one-step solvothermal method. The composite photocatalyst is free of toxicity, is environmentally friendly, and is suitable for industrial production. Under visible light, the composite photocatalyst can be used for photocatalytic degradation of rhodamine B, and the photocatalytic performance of the composite photocatalyst is greatly improved.

Description

technical field [0001] The invention belongs to the field of photocatalysts, and in particular relates to a preparation method of a Bi / BiOBr / RGO composite photocatalyst and its products and applications. Background technique [0002] Bismuth oxybromide (BiOBr) is an ideal visible-light-driven bismuth-based photocatalyst with a unique layered structure and relatively high photocatalytic activity. The disadvantage is that the single BiOBr has low utilization rate of visible light and the electrons and holes generated after photoexcitation are easy to recombine, which greatly limits the large-scale application of BiOBr in industry. [0003] So far, bismuth-based composites have been extensively studied to solve problems that single-component catalysts cannot solve by themselves. For example, Huang et al. successfully prepared the catalyst Bi / Bi by a two-step hydrothermal method. 2 WO 6 , has excellent degradation effect on rhodamine B and 4-chlorophenol (Y.K.Huang, S.F.Kang,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06
CPCB01J27/06B01J35/39
Inventor 何光裕陈海群姚焱袁菁菁郝青丽朱俊武付永胜汪信孙小强
Owner CHANGZHOU UNIV
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