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CuO/Bi4O5BrxI2-x composite photocatalyst with two-dimensional heterostructure and preparation method thereof

A bi4o5brxi2-x, heterostructure technology, applied in the field of photocatalysis technology and environmental pollution treatment, can solve the problems of weak interface of heterostructure, complex and harsh process, unfavorable for charge transport and transfer, etc., and achieves absorption enhancement, Easy to operate, visible light catalytic activity improvement effect

Active Publication Date: 2020-05-05
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relatively speaking, the interface effect of the heterostructure prepared by the physical mixing method is relatively weak, which is not conducive to charge transport and transfer.
The chemical synthesis method requires rational design to form an effective interface between different components, so as to realize the separation and transfer of photogenerated charges, so the process is complex and harsh.

Method used

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  • CuO/Bi4O5BrxI2-x composite photocatalyst with two-dimensional heterostructure and preparation method thereof
  • CuO/Bi4O5BrxI2-x composite photocatalyst with two-dimensional heterostructure and preparation method thereof
  • CuO/Bi4O5BrxI2-x composite photocatalyst with two-dimensional heterostructure and preparation method thereof

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preparation example Construction

[0030] A two-dimensional heterostructure CuO / Bi of the present invention 4 o 5 Br x I 2-x The preparation method of composite photocatalyst comprises the steps:

[0031] Accurately weigh 0.3g of Bi 4 o 5 Br x I 2-x Disperse the solid solution in deionized water, ultrasonically disperse for 0.5h; weigh 0-30mg of CuCl at the same time 2 2H 2 O was dissolved in an appropriate amount of deionized water, and then added dropwise to the above Bi 4 o 5 Br x I 2-x In the suspension, the mixed solution is placed under a xenon lamp light source, and the photosynthetic reaction is carried out by magnetic stirring for 0.5-3 hours. Finally, the obtained product was centrifuged, washed with deionized water and absolute ethanol, and dried in an oven at 60°C for several hours to obtain a two-dimensional heterostructure CuO / Bi 4 o 5 Br x I 2-x composite photocatalyst.

[0032] In order to better understand the present invention, the content of the present invention is further i...

Embodiment 1

[0034] A two-dimensional heterostructure CuO / Bi 4 o 5 Br x I 2-x The preparation method of composite photocatalyst comprises the following steps:

[0035] Accurately weigh 0.3g of Bi 4 o 5 Br 1 I 1 (abbreviated as BI0) solid solution dispersed in 30mL deionized water, ultrasonic dispersion 0.5h; at the same time weigh 10mg of CuCl 2 2H 2 O was dissolved in an appropriate amount of deionized water, and then added dropwise to the above BI0 suspension, and the mixed solution was placed under a 300W xenon lamp, and the photosynthetic reaction was carried out for 1 h with magnetic stirring. Finally, the obtained product was centrifuged, washed with deionized water and absolute ethanol, and dried in an oven at 60 °C for several hours to obtain a two-dimensional heterostructure composite photocatalyst, which was recorded as CuO / BI0.

[0036] The obtained CuO / BI0 composite photocatalyst was characterized by X-ray diffraction, CuO and Bi 4 o 5 The diffraction peaks of BrI co...

Embodiment 2

[0039] A two-dimensional heterostructure CuO / Bi 4 o 5 Br x I 2-x The preparation method of composite photocatalyst comprises the following steps:

[0040] Accurately weigh 0.3g of Bi 4 o 5 Br 2 (B0) Disperse the solid solution in 30mL deionized water, ultrasonically disperse for 0.5h; weigh 10mg of CuCl at the same time 2 2H 2 O was dissolved in an appropriate amount of deionized water, and then added dropwise to the above Bi 4 o 5 Br 2 In the suspension, the mixed solution was placed under a 300W xenon lamp, and the photosynthetic reaction was carried out for 1 h with magnetic stirring. Finally, the obtained product was centrifuged, washed with deionized water and absolute ethanol, and dried in an oven at 60 °C for several hours to obtain a two-dimensional heterostructure composite photocatalyst, which was recorded as CuO / B0.

[0041] X-ray diffraction characterization and transmission electron microscopy analysis were also carried out on the CuO / B0 sample, indicat...

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Abstract

The invention discloses a CuO / Bi4O5BrxI2-x composite photocatalyst with a two-dimensional heterostructure and a preparation method thereof, and belongs to the technical field of photocatalysis and environmental pollution treatment. According to the preparation method, Bi4O5BrxI2-x has visible light responsiveness and relatively strong photooxidation capability, and CuO nanosheets are generated onthe surface of Bi4O5BrxI2-x in situ in a specific photosynthesis environment, so that a tightly-combined two-dimensional heterostructure CuO / Bi4O5BrxI2-x composite photocatalytic material is formed. The method is simple in process, low in cost and easy to operate, and the prepared two-dimensional heterostructure CuO / Bi4O5BrxI2-x composite photocatalyst has the efficient photocatalytic performance.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis technology and environmental pollution treatment, and specifically relates to a two-dimensional heterostructure CuO / Bi 4 o 5 Br x I 2-x Composite photocatalyst and preparation method thereof. Background technique [0002] At present, environmental pollution is becoming more and more serious, and has become a focus problem that directly threatens human survival and needs to be solved urgently. Photocatalytic technology is a green technology that has been gradually developed since the 1970s and has important application prospects in the fields of energy and the environment. This technology can oxidize and decompose organic pollutants in the environment, and finally degrade them into CO 2 Small molecular substances such as water, inorganic ions, etc., are considered to be the most potential environmental pollution treatment methods due to the advantages of no secondary pollution and high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/30B01D53/86B01D53/44C02F101/30
CPCB01J27/06C02F1/30B01D53/8687C02F2305/10C02F2101/30B01J35/39Y02W10/37
Inventor 段芳刘澳杨丽靖路姗姗朱罕陆双龙杜明亮陈明清
Owner JIANGNAN UNIV
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