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BiOBr/RGO composite aerogel, preparation method and application of BiOBr/RGO composite aerogel

A composite airgel and graphene airgel technology, applied in the field of photocatalysis, can solve the problems of low efficiency, easy deactivation, difficult separation and recovery, etc., to achieve convenient separation and recovery, high reuse rate, simple and easy preparation method line effect

Inactive Publication Date: 2014-10-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a BiOBr / RGO composite airgel and its preparation method and application, to solve the problems of low efficiency, easy deactivation, difficult separation and recovery of traditional photocatalysts when degrading dye organic pollutants

Method used

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  • BiOBr/RGO composite aerogel, preparation method and application of BiOBr/RGO composite aerogel

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Embodiment 1

[0021] Preparation of BiOBr / RGO Composite Airgel with Efficient Liquid Phase Degradability

[0022] BiBr 3 Add 50 mL of an aqueous solution containing 200 mg of lysine, stir vigorously at room temperature for 30 min to form a uniform white suspension, then add 20 mL of graphene oxide (5 mg / mL), transfer to 100 mL of water In a hot kettle, react at 160°C for 10h. After cooling, the product hydrogel was washed and freeze-dried to obtain the composite airgel, wherein the BiOBr loading was 71.4wt%-90.9wt%.

[0023] figure 1 The photos of the BiOBr / RGO composite aerogels with different contents of the present invention are shown, indicating that good aerogels can be formed within this ratio range. figure 2 The X-ray diffraction (XRD) pattern of the BiOBr / RGO composite airgel of the present invention is shown, from which it can be found that the prepared sample is a composite of BiOBr and RGO. image 3 The ultraviolet-visible diffuse reflectance (DRS) diagrams of BiOBr / RGO and ...

Embodiment 2

[0025] Comparison of BiOBr / RGO Composite Airgel and BiOBr Powder Liquid Phase Photocatalytic Degradation of Rhodamine B

[0026] The obtained BiOBr / RGO composite airgel was used to degrade Rhodamine B in liquid phase. The sample was added to 60 mL Rhodamine B solution (20 ppm) for photocatalytic degradation under sunlight. The photocatalytic degradation of Rhodamine B was detected by Cary-500 spectrophotometer. BiOBr / RGO composite airgel of the present invention and BiOBr powder are compared to the degradation of Rhodamine B as follows Figure 5 shown. It can be observed from the figure that in the absence of a catalyst, light hardly degrades Rhodamine B. When adding the composite airgel of the present invention or BiOBr powder, the photocatalytic degradation rate of Rhodamine B is greatly improved. However, when the catalyst of the present invention is illuminated for 3 h, the rhodamine B has been completely decolorized, and the rhodamine B solution is completely degraded a...

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Abstract

The invention provides a BiOBr / RGO composite aerogel, a preparation method and application of the BiOBr / RGO composite aerogel, belonging to the technical field of material preparation and environment purification. The method comprises the following steps: firstly, loading the BiOBr on RGO aerogel through a simple one-step hydrothermal method to form the BiOBr / RGO composite aerogel having a macrostructure that the diameter is 2.5cm and the height is 2.5cm by using lysine as a reducing agent and a crosslinking agent. The composite aerogel prepared by the invention has high specific area and is capable of effectively adsorbing and photo-catalytically degrading dye organic pollutant, and is easily separated and recycled. The preparation method is simple, the raw material has low price and is easily available, large-scale industrial production is facilitated, and the obvious economic and social benefits are provided.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis in environmental treatment, and in particular relates to a photocatalyst BiOBr / RGO composite airgel for efficiently degrading dye organic pollutants and a preparation method thereof. Background technique [0002] Airgel is a bulk material containing micropores and mesopores, with a continuous three-dimensional network structure. RGO aerogels have attracted extensive attention from researchers due to their unique low density, high specific surface area, and large pore size. The RGO airgel obtained by using graphene oxide and various cross-linking agents as precursors has excellent mechanical strength and thermal stability, and has potential applications in solar cells, lithium batteries, various sensors, water treatment, etc. Application prospect. [0003] In the past few decades, semiconductor photocatalysts have been widely used to treat organic pollutants in water bodies. Nano-BiOBr is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J13/00C02F1/30
CPCY02W10/37
Inventor 李朝晖刘文君蔡静宇陈旬戴文新
Owner FUZHOU UNIV
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