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Preparation method of V-N co-doped TiO2/MoS2 composite photocatalysis material

A composite photocatalysis and co-doping technology, applied in chemical instruments and methods, physical/chemical process catalysts, water/sewage treatment, etc. The effect of enhancing photocatalytic performance and enhancing photocatalytic degradation ability

Inactive Publication Date: 2018-04-13
吴刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: Aiming at the problems of narrow photoresponse range and low quantum efficiency of traditional photocatalytic materials, a V-N co-doped TiO 2 / MoS 2 Preparation method of composite photocatalytic material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Take 0.1mol of tetrabutyl titanate and 10g of glacial acetic acid, add them to 100g of absolute ethanol, stir at 300r / min for 20min, then add 0.01mol of diethanolamine, 0.01mol of ammonium metavanadate, and continue to stir for 2h to obtain a mixed solution. Add 10g of molybdenum disulfide powder and 3.0g of sodium cholate into 2.0L of deionized water, disperse with 300W ultrasonic waves for 6h in a constant temperature water bath at 40°C, then transfer to a centrifuge and centrifuge at 3000r / min for 30min, and take the supernatant liquid, and centrifuged at 10000r / min for 30min, and the precipitated graphene-like structure molybdenum disulfide was obtained. Take 4g of graphene-like structure molybdenum disulfide, add 200g mass fraction of 1% acetic acid solution, and disperse with 300W ultrasonic wave for 30min. To obtain the base liquid, add the mixed liquid dropwise to the base liquid at 1ml / min, stir at 600r / min at 0°C until the dropwise addition is complete, then tr...

example 2

[0027] Take 0.1mol of tetrabutyl titanate and 15g of glacial acetic acid, add them to 150g of absolute ethanol, stir at 350r / min for 25min, then add 0.01mol of diethanolamine, 0.01mol of ammonium metavanadate, and continue to stir for 2h to obtain a mixed solution. Add 11g of molybdenum disulfide powder and 3.3g of sodium cholate into 2.2L of deionized water, disperse with 300W ultrasonic wave for 7h in a constant temperature water bath at 45°C, then transfer to a centrifuge and centrifuge at 3500r / min for 35min, and take the supernatant liquid, and centrifuged at 11000r / min for 35min, and the precipitated graphene-like structure molybdenum disulfide was obtained. Take 6g of graphene-like structure molybdenum disulfide, add 300g mass fraction of 1% acetic acid solution, and disperse with 300W ultrasonic wave for 35min. To obtain the base liquid, add the mixed liquid dropwise to the base liquid at 1ml / min, and stir at 700r / min at 2°C until the dropwise addition is complete, then...

example 3

[0029] Take 0.2mol of tetrabutyl titanate and 20g of glacial acetic acid, add them to 200g of absolute ethanol, stir at 400r / min for 30min, then add 0.02mol of diethanolamine, 0.02mol of ammonium metavanadate, and continue to stir for 3h to obtain a mixed solution. Add 12g of molybdenum disulfide powder, 3.6g of sodium cholate, add 2.4L of deionized water, disperse with 300W ultrasonic wave for 8h in a constant temperature water bath at 50°C, then transfer to a centrifuge and centrifuge at 4000r / min for 40min, and take the supernatant liquid, and centrifuged at 12000r / min for 40min, and the precipitated graphene-like structure molybdenum disulfide was obtained. Take 8g of graphene-like structure molybdenum disulfide, add 400g mass fraction to 1% acetic acid solution, and disperse with 300W ultrasonic wave for 40min. To obtain the base liquid, add the mixed liquid dropwise to the base liquid at 2ml / min, stir at 800r / min at 4°C until the dropwise addition is complete, then transf...

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Abstract

The invention relates to a preparation method of a V-N co-doped TiO2 / MoS2 composite photocatalysis material, and belongs to the technical field of preparation of a photocatalysis material. The preparation method comprises the following steps: enabling V-N to enter TiO2 crystal lattices in a clearance mode; and compounding V-N to MoS2 to form a special structure. More active sites in photocatalysisreaction is provided, adsorption and transmission of substances in a catalytic process are facilitated, and photocatalysis is enhanced by adsorption synergy. TiO2 band gaps are reduced by co-doping,ability of absorption of TiO2 to ultraviolet visible light is enhanced, TiO2 is compounded to MoS2, energy pole energy between TiO2 AND MoS2 is changed, by the band gaps which are narrow enough, valence electrons can be excited to a conduction band after absorbing the visible light, a photoresponse range is enhanced, and photocatalytic performance is enhanced. The prepared composite material is subjected to photoinduction to generate high electron and cavity separation rate, photo-induced electrons can be quite easily migrated to the surface from an inner region of the photocatalysis materialto participate reaction, by enhancement of electric charge carrier separation, more active oxygen groups are increased, and thus, the photocatalysis degradation ability is improved.

Description

technical field [0001] The invention relates to a V-N co-doped TiO 2 / MoS 2 The invention discloses a method for preparing a composite photocatalytic material, belonging to the technical field of photocatalytic material preparation. Background technique [0002] As a clean, safe and abundant renewable energy, solar energy has attracted more and more attention. The annual solar energy absorbed by the earth's atmosphere, ocean and land is about 3.85×10 6 EJ is equivalent to twice the sum of all the non-renewable energy coal, oil, natural gas and uranium obtained and mined by human beings on the earth. Therefore, making full use of solar energy can not only solve the energy crisis, but also reduce environmental pollution and ecological damage. Although the total amount of solar energy reaching the earth's surface is large, the energy flow density is very low, and it is limited by natural conditions such as day and night, seasons, geographical latitude and altitude, as well ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/32C02F1/72C02F101/34C02F101/36C02F101/38
CPCC02F1/30C02F1/32C02F1/725B01J27/24C02F2101/34C02F2101/36C02F2101/38C02F2305/10B01J35/39
Inventor 雷洪云王文新韩昏晓
Owner 吴刚
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