a bivo 4 /agio 3 Heterojunction nano photocatalytic material and its preparation method and application

A technology of photocatalytic materials and catalytic materials, applied in the field of BiVO4/AgIO3 heterojunction nano-photocatalytic materials and their preparation, can solve the problems of poor separation efficiency of photogenerated electrons and holes, limit photocatalytic efficiency, etc., and reduce recombination probability , The process is simple, and the effect of accelerating the separation

Active Publication Date: 2021-05-25
FUJIAN UNIV OF TECH
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Problems solved by technology

Among them, n-type BiVO 4 The semiconductor has a good visible light photocatalytic effect because of its bandgap width of about 2.3eV, but a single BiVO 4 The poor separation efficiency of photogenerated electrons and holes of photocatalysts limits its final photocatalytic efficiency.
There is no AgIO yet 3 / BiVO 4 Reports on Heterojunction Photocatalysts

Method used

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  • a bivo <sub>4</sub> /agio <sub>3</sub> Heterojunction nano photocatalytic material and its preparation method and application
  • a bivo <sub>4</sub> /agio <sub>3</sub> Heterojunction nano photocatalytic material and its preparation method and application
  • a bivo <sub>4</sub> /agio <sub>3</sub> Heterojunction nano photocatalytic material and its preparation method and application

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Embodiment 1

[0031] Preparation scheme of the present invention:

[0032] Dissolve 2.3g of ammonium vanadate in 20ml of sodium hydroxide solution to obtain solution A; another measure of 9.7g of bismuth nitrate pentahydrate was dissolved in 20ml of concentrated nitric acid to obtain solution B; solution B was added dropwise to solution A, and ultrasonic After 25 minutes of treatment, adjust the pH of the mixture to 7, stir it magnetically for 30 minutes, transfer it into a 100ml polytetrafluoroethylene autoclave, react at 180°C for 24 hours, wash and filter the product with distilled water and ethanol, and dry it at 80°C for 12 hours Get BiVO 4 photocatalyst.

[0033] Synthetic BiVO 4 The photocatalyst is the benchmark, and the synthetic AgIO is weighed according to the molar ratio of the substance at 0.4:1. 3 needed silver nitrate and potassium iodate. Dissolve the weighed silver nitrate in 20ml of distilled water, add BiVO 4 , magnetically stirred for 30min, potassium iodate dissolv...

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Abstract

The invention belongs to the technical field of photocatalytic materials, in particular to a BiVO 4 / AgIO 3 Heterojunction nano photocatalytic material and its preparation method and application. The photocatalytic material is made of BiVO 4 with AgIO 3 Composite. The present invention uses silver nitrate, potassium iodate, ammonium vanadate and bismuth nitrate as raw materials, and utilizes hydrothermal method and precipitation method to obtain AgIO with better visible light response. 3 / BiVO 4 A heterojunction photocatalytic material that can be used for photocatalytic degradation of organic dyes and antibiotics in wastewater under visible light. The preparation method involved in the present invention has simple process, easy control and low cost; the prepared AgIO 3 / BiVO 4 Heterojunction photocatalytic materials with higher visible light catalytic activity than AgIO 3 and BiVO 4 All have been significantly improved, the photocurrent is larger, and its visible light catalytic activity and stability are better improved. It has a better degradation effect on antibiotics such as tetracycline and dyes such as rhodamine B in water, and can further expand its volatility. Application in photocatalytic degradation of organic waste gas.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a BiVO 4 / AgIO 3 Heterojunction nano photocatalytic material and its preparation method and application. Background technique [0002] Photocatalytic technology is a clean material conversion technology for light energy utilization. Its application fields include photolysis of water to produce hydrogen, degradation of organic pollutants in water, degradation of volatile organic compounds (VOCs) in the air, and simulation of plant photosynthesis process. Wait. The technology of realizing photocatalytic reaction with the help of semiconductor materials has received more and more attention. Semiconductor materials can generate electron-hole pairs under light. The semiconductor surface has a strong reducing ability and can combine with the adsorbed oxygen to generate strong oxidizing free radicals; while the holes that migrate to the semiconductor surface have a s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/08B01J35/02C02F1/30B01D53/86B01D53/44C02F101/30C02F101/36C02F101/38C02F103/34
CPCB01D53/8687B01D2257/708B01D2259/802B01J27/08B01J35/004B01J35/023C02F1/30C02F2101/308C02F2101/36C02F2101/38C02F2103/34C02F2305/10
Inventor 刘敏毅林国良宋旭春谢宇昕
Owner FUJIAN UNIV OF TECH
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