CN-122006694-A - Nb/Bi composite photocatalytic material, preparation method and photodegradation dye application thereof

Abstract

The invention discloses a Nb/Bi composite photocatalytic material, a preparation method and application of photodegradation dye thereof, and belongs to the technical field of new materials. The preparation method of the Nb/Bi composite photocatalytic material comprises the following steps of mixing NbCl 5 and Bi (NO 3 ) 3 in a solvent to obtain a mixed solution, heating for reaction, and then carrying out solid-liquid separation to obtain a precursor; the Nb/Bi composite photocatalytic material with uniform morphology is successfully prepared by adopting a solvent thermal method and adopting NbCl 5 and Bi (NO 3 ) 3 as precursors through a heating reaction mode, and experimental results show that, the Nb/Bi composite photocatalytic material has stable performance, excellent visible light photocatalytic degradation capability, can be recycled for multiple times, and has important practical significance for solving the water environment pollution problem.

Inventors

• DING SHUANG
• ZENG XU
• LI YAN
• YAN YALAN
• WANG BO
• LIANG XIAO
• REN BO
• YANG XIAODONG

Assignees

• 吉林工程技术师范学院

Dates

Publication Date

20260512

Application Date

20260202

Claims (8)

1. 1. The preparation method of the Nb/Bi composite photocatalytic material is characterized by comprising the following steps of: Mixing NbCl 5 and Bi (NO 3 ) 3 in a solvent to obtain a mixed solution, heating for reaction, and then carrying out solid-liquid separation to obtain a precursor; and calcining the precursor to obtain the Nb/Bi composite photocatalytic material.
2. 2. The method according to claim 1, wherein the molar ratio of NbCl 5 to Bi (NO 3 ) 3 ) is 1:1-20.
3. 3. The method according to claim 1, wherein the heating reaction is carried out at a temperature of 160 to 200 ℃ for 12 to 48 hours.
4. 4. The method according to claim 1, wherein the calcination treatment is performed at a temperature of 200 to 500 ℃ for 1 to 4 hours.
5. 5. The method according to claim 4, wherein the temperature rise rate of the calcination treatment is 1 to 10 ℃.
6. 6. The method of claim 1, wherein the solvent is ethanol.
7. 7. A Nb/Bi composite photocatalytic material obtained by the production method according to any one of claims 1 to 6.
8. 8. Use of the Nb/Bi composite photocatalytic material according to claim 7 in the field of degradation of pollutants in water.

Description

Nb/Bi composite photocatalytic material, preparation method and photodegradation dye application thereof Technical Field The invention relates to the technical field of new materials, in particular to a Nb/Bi composite photocatalytic material, a preparation method and application of photodegradation dye thereof. Background In recent years, the water environment pollution problem is getting severe, and serious threats are caused to human health, ecosystem and social economy. Therefore, developing a green sustainable water purification technology has become a key topic to be overcome by global researchers. The photocatalysis technology is regarded as one of ideal ways for solving the water environment pollution problem because of the advantages of environmental friendliness, mild reaction conditions, multiple functions and the like. Photocatalytic materials play a critical role in the photocatalytic process as a key to the photocatalytic process, and therefore, how to develop photocatalytic materials with excellent properties is a research hotspot in the field. Among the photocatalytic materials, bismuth-based materials are attracting attention because of their safety, non-toxicity, easy preparation, and abundant reserves, and especially their unique layered structure and suitable forbidden band width give them good light response characteristics. However, bismuth-based materials still face inherent defects of low photo-generated electron efficiency, high electron-hole recombination rate, limited specific surface area and the like, and limit the practical application of the bismuth-based materials in the field of photocatalysis. On the other hand, the niobium-based material is used as an n-type semiconductor, has the forbidden bandwidth similar to that of TiO 2, has the advantages of safety, no toxicity, strong oxidation-reduction capability, good light absorption performance and the like, and has obvious potential in the aspect of photocatalytic degradation of water pollutants. At present, a plurality of researches on respective systems of bismuth-based photocatalytic materials and niobium-based photocatalytic materials are reported, however, the two are compounded to synergistically overcome respective defects, and the related work of constructing a novel photocatalytic material with high catalytic activity is still relatively lacking, and further researches are still needed. Disclosure of Invention The invention aims to provide a Nb/Bi composite photocatalytic material, a preparation method and application of photodegradation dye thereof, so as to solve the problems in the background art. The invention successfully prepares the Nb/Bi composite photocatalytic material with uniform morphology by using NbCl 5 and Bi (NO 3)3 as precursors through a heating reaction mode through a solvothermal method, and experimental results show that, the Nb/Bi composite photocatalytic material has stable performance, excellent visible light photocatalytic degradation capability, can be recycled for multiple times, and has important practical significance for solving the water environment pollution problem. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a preparation method of a Nb/Bi composite photocatalytic material, which comprises the following steps: Mixing NbCl 5 and Bi (NO 3)3 in a solvent to obtain a mixed solution, heating for reaction, and then carrying out solid-liquid separation to obtain a precursor; and calcining the precursor to obtain the Nb/Bi composite photocatalytic material. Preferably, the molar ratio of NbCl 5 to Bi (NO 3)3 is added in a range of 1:1 to 20, preferably 1:5). Preferably, the temperature of the heating reaction is 160-200 ℃ and the time is 12-48 hours. Preferably, the temperature of the calcination treatment is 200-500 ℃ and the time is 1-4 hours. Preferably, the temperature rising speed of the calcination treatment is 1-10 ℃ per minute. Preferably, the solvent is ethanol. The second technical scheme of the invention is to provide the Nb/Bi composite photocatalytic material obtained by the preparation method. The third technical scheme of the invention provides application of the Nb/Bi composite photocatalytic material in the field of pollutant degradation in water. The beneficial technical effects of the invention are as follows: According to the invention, nbCl 5 and Bi (NO 3)3 are used as precursors, and the Nb/Bi composite photocatalytic material with uniform morphology is successfully prepared by a solvothermal method through a heating reaction mode. The Nb/Bi composite photocatalytic material has stable performance and excellent visible light photocatalytic degradation capability, can be recycled for multiple times, and has important practical significance for solving the water environment pollution problem. The preparation method provided by the invention is simple and convenient, low in energy consumpti