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Photocatalytic material as well as preparation method and application thereof

A photocatalytic material, potassium bromide technology, applied in the field of photocatalysis, can solve the problem of low hydrogen peroxide efficiency, achieve excellent photocatalytic hydrogen peroxide production performance, stable performance, and good market application prospects

Active Publication Date: 2021-04-13
HENAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a photocatalytic material to solve the problem that the efficiency of synthesizing hydrogen peroxide is not high in the existing BiOBr photocatalyst proposed in the above background technology in the production of hydrogen peroxide by photolysis of water

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  • Photocatalytic material as well as preparation method and application thereof
  • Photocatalytic material as well as preparation method and application thereof
  • Photocatalytic material as well as preparation method and application thereof

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preparation example Construction

[0036] The embodiment of the present invention also provides a method for preparing a photocatalytic material. The method for preparing a photocatalytic material includes the following steps:

[0037] Weigh bismuth nitrate pentahydrate and potassium bromide (KBr) according to the proportion, add them to the mixture of water and ethylene glycol and mix them evenly to obtain a bismuth oxybromide precursor solution;

[0038] adding potassium hexafluorophosphate to the mixture of ethanol and water for uniform mixing to obtain a potassium hexafluorophosphate solution;

[0039] The potassium hexafluorophosphate solution is added dropwise to the bismuth oxybromide precursor solution and mixed evenly, then transferred to a reaction kettle for hydrothermal reaction, washed and dried after cooling, to obtain the photocatalytic material.

[0040] As another preferred embodiment of the present invention, in the preparation method of the photocatalytic material, the condition of the hydrot...

Embodiment 1

[0049] A photocatalytic material, the specific preparation method is as follows:

[0050] 2.328 g of Bi(NO 3 ) 3 ·5H 2 The mixture of O and 0.571 g of KBr was added to a mixture of 12 mL of water and 28 mL of ethylene glycol and stirred magnetically for 40 min to obtain a bismuth oxybromide precursor solution. At the same time, a certain amount of KPF 6 Add it to the mixed solution of 10 mL ethanol and 10 mL deionized water, stir for 30 min until clear, and obtain potassium hexafluorophosphate solution (KPF in potassium hexafluorophosphate solution 6 The content is 10wt%). Subsequently, the potassium hexafluorophosphate solution was added dropwise to the above-mentioned bismuth oxybromide precursor solution, and after further magnetic stirring for 30 min, it was transferred to the reactor and kept at 110 °C for 10 h, and the reactor was naturally cooled to room temperature , washed with water and ethanol, and dried overnight at 60 °C to obtain KPF 6 The improved BiOBr co...

Embodiment 2

[0053] Compared with Example 1, except KPF in potassium hexafluorophosphate solution 6 The content of is 20wt%, other is identical with embodiment 1. The photocatalytic material prepared in this example is designated as KB-2.

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Abstract

The invention relates to the technical field of photocatalysis, and particularly discloses a photocatalytic material and a preparation method and application thereof, and the main components of the photocatalytic material are KPF6 and BiOBr. The photocatalytic material provided by the embodiment of the invention has excellent performance of preparing H2O2 by photocatalysis, is a BiOBr composite material improved by KPF6, can be used for efficiently preparing H2O2 by photolysis of water, is prepared by dropwise adding a potassium hexafluorophosphate solution into a bismuth oxybromide precursor solution by adopting a one-step hydrothermal method for hydrothermal reaction, is simple to operate. The problem that an existing BiOBr photocatalyst is not high in hydrogen peroxide synthesis efficiency in the process of preparing hydrogen peroxide through water photolysis is solved. Moreover, the preparation method provided by the invention is simple, and the prepared photocatalytic material is stable in performance and low in cost and has a good market application prospect.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a photocatalytic material and its preparation method and application. Background technique [0002] hydrogen peroxide (H 2 o 2 ) as an effective cleaning chemical reagent, can be miscible with water in any proportion, is a strong oxidizing agent, can be used for medical wound disinfection, environmental disinfection and food disinfection, and has a wide range of applications in the fields of papermaking, textiles, water purification and chemical synthesis. Broad application prospects. [0003] At present, the traditional method of producing hydrogen peroxide is complicated and consumes a lot of energy. Semiconductor photocatalyst is an ideal method for producing H 2 o 2 The way has attracted widespread attention, because this process only requires the existence of H 2 O, O 2 and light. Among many photocatalysts, TiO 2 , g-C 3 N 4 , GO (graphene oxide), BiOBr (bis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/14B01J27/06B01J37/10C01B15/027
CPCB01J27/14B01J27/06B01J37/10C01B15/027B01J35/39
Inventor 孙剑辉杜翠伟聂士雨张晶陈如艳韩笑吴宇涵
Owner HENAN NORMAL UNIV
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