Carbon quantum dot-modified bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite photocatalyst, and preparation method and application thereof

A technology of fluorine-doped tin oxide and carbon quantum dots, which is applied in the direction of physical/chemical process catalysts, oxygen/ozone/oxide/hydroxide, oxygen preparation, etc., can solve the problems that limit the application of cadmium-based quantum dots, and achieve Effects of reduced recombination rate, high catalytic performance, and high specific surface area

Active Publication Date: 2019-09-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environmental unfriendliness of many quantum dots limits their practical applications, for example, cadmium pollution limits the application of cadmium-based quantum dots

Method used

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  • Carbon quantum dot-modified bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite photocatalyst, and preparation method and application thereof
  • Carbon quantum dot-modified bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite photocatalyst, and preparation method and application thereof
  • Carbon quantum dot-modified bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Prepare a fluorine-doped tin oxide film with an ordered macroporous three-dimensional space structure on a conductive substrate:

[0041] (1) Concentrated sulfuric acid and hydrogen peroxide solution are prepared with piranha solution at a volume ratio of 3:1, and the newly prepared piranha solution is soaked in FTO conductive glass for more than 2 hours to remove organic impurities on the surface of the conductive glass. After soaking, use deionized water Rinse several times until the solution pH = 7, remove and dry under nitrogen flow.

[0042] (2) Polystyrene monodisperse bead (d≈450nm) solution is sonicated for 2 minutes, take 1ml of the solution and put it in 40ml pentahydrate ethanol, put the clean FTO glass obtained above into a glass vial containing polystyrene monodisperse bead solution , the polystyrene monodisperse bead solution just submerged the FTO conductive glass with its rough conductive surface facing outward.

[0043] Transfer the glass vial conta...

Embodiment 2

[0061] The difference between this example and Example 1 is that when using the in-situ synthesis method to synthesize bismuth tungstate, the number of soaking cycles is 20, and the other steps are exactly the same, marked as 20-CQD / Bi 2 WO 6 @mac - FTO.

Embodiment 3

[0063] The difference between this example and Example 1 is that when using the in-situ synthesis method to synthesize bismuth tungstate, the number of soaking cycles is 40 times, and the other steps are exactly the same, marked as 40-CQD / Bi 2 WO 6 @mac - FTO.

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Abstract

The invention discloses a carbon quantum dot modified bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite photocatalyst, and a preparation method and application thereof, belonging to the technical field of photocatalysis of solar-photoelectrochemical conversion. The composite photocatalyst is prepared by preparing a fluorine-doped tin oxide film with a three-dimensional ordered porous space structure on a conductive substrate, allowing bismuth tungstate to grow on the film to prepare a bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite film, soaking the bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite film in a carbon quantum dot solution and carrying out vacuum drying. The carbon quantum dot-modified bismuth tungstate/ordered macroporous fluorine-doped tin oxide composite film has high specific surface area, high electrical conductivity and high photocatalytic activity, and can be used as a photoanode material for solar-photoelectrochemical conversion equipment. The preparation method of the invention has the advantages of simple process, mild reaction conditions, easy control, and good application prospects.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic solar energy-photoelectrochemical conversion, and more specifically relates to a carbon quantum dot modified bismuth tungstate / ordered macroporous fluorine-doped tin oxide composite photocatalyst and its preparation method and application. Background technique [0002] With the excessive development and utilization of fossil energy, the energy crisis will be the main social problem that all countries in the world will inevitably face. The development of photocatalytic technology with high efficiency and low energy consumption is of great significance for alleviating energy crisis and environmental pollution. Traditional catalytic technologies have disadvantages such as low photocatalytic efficiency, high cost, and secondary pollution. In 1970, Japanese researchers Tujishima and Honda used TiO2 as a photocatalyst and decomposed water under ultraviolet irradiation to produce oxygen and hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J35/06B01J35/10B82Y30/00B82Y40/00C01B3/04C01B13/02
CPCB01J27/135B01J35/004B01J35/065B01J35/0033B01J35/1004B82Y30/00B82Y40/00C01B3/042C01B13/0207C01B2203/1082C01B2203/1041C01B2203/0277Y02E60/36Y02P20/133
Inventor 陈其赞罗东向张梦龙杜国辉
Owner GUANGDONG UNIV OF TECH
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