Composite titanium dioxide nano-sheet photocatalyst, preparation method and applications thereof

A technology of titanium dioxide and photocatalyst, applied in the field of photocatalysis, can solve the problems of two-dimensional nanostructure research, the efficiency is only 80%, and achieve the effect of simple preparation method, improved efficiency and reduced energy cost

Active Publication Date: 2015-08-19
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, 2D nanostructures are less studied
The Chinese patent with the patent number CN201210462406.2 reports a composite titanium dioxide nanotube array photocatalyst and its preparation method. The composite titanium dioxide nanotube array photocatalyst prepared by this method simulates the impact of sunlight on 10mg / L of 2,4 -Dichlorophenoxyacetic acid is photocatalyzed, and the degradation efficiency is only 80% in 3 hours

Method used

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  • Composite titanium dioxide nano-sheet photocatalyst, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0033] Configure P with a mass ratio of 1:14 123 and absolute ethanol mixed solution, the obtained mixed solution was added into the concentrated hydrochloric acid and isopropyl titanate mixed solution with a volume ratio of 1:3, and stirred for 30 min. Take the above solution and ethylene glycol with a volume ratio of 1:8, mix them evenly and add them into an autoclave, and react for 20 hours at 120°C, then wash the solid product in the autoclave with absolute ethanol for 4 times, and put it in a vacuum drying oven for 80 °C, dried for 3 hours to obtain white titanium dioxide nanosheets. 100 mg of titanium dioxide nanosheets were calcined in a tube furnace at 500° C. for 2 h, and then cooled down to room temperature naturally to obtain a white solid.

[0034] Weigh titanium dioxide nanosheets and melamine with a mass ratio of 1:2 and dissolve them in water, mix the mixed solution with 15 mg / L carbon quantum dot solution at a volume ratio of 3:1, stir at 69~70°C for 6...

Embodiment example 2

[0036] Configure P with a mass ratio of 1:15 123 and absolute ethanol mixed solution, the obtained mixed solution was added into the concentrated hydrochloric acid and isopropyl titanate mixed solution with a volume ratio of 1:3, and stirred for 30 min. Take the above solution and ethylene glycol with a volume ratio of 1:8, mix them evenly and add them to the autoclave, and react for 20 hours at 120 °C, then wash the solid product in the autoclave with absolute ethanol for 3 times, and put it in a vacuum drying oven for 80 °C, dried for 3 hours to obtain white titanium dioxide nanosheets. 100 mg of titanium dioxide nanosheets were calcined in a tube furnace at 500° C. for 2 h, and then cooled down to room temperature naturally to obtain a white solid.

[0037] Weigh titanium dioxide nanosheets and melamine with a mass ratio of 1:4 and dissolve them in water, mix the mixed solution with 12mg / L carbon quantum dot solution at a volume ratio of 3:1, stir at 69~70°C for 6h...

Embodiment example 3

[0039] Configure P with a mass ratio of 1:15 123 and absolute ethanol mixed solution, the obtained mixed solution was added into the concentrated hydrochloric acid and isopropyl titanate mixed solution with a volume ratio of 1:4, and stirred for 30 min. Take the above solution and ethylene glycol with a volume ratio of 1:10, mix them evenly and add them into the autoclave, react at 120°C for 20h, then wash the solid product in the autoclave with absolute ethanol for 3 times, and put it in a vacuum drying oven for 80 °C, dried for 3 hours to obtain white titanium dioxide nanosheets. 100 mg of titanium dioxide nanosheets were calcined in a tube furnace at 500° C. for 2 h, and then cooled down to room temperature naturally to obtain a white solid.

[0040]Weigh titanium dioxide nanosheets and melamine with a mass ratio of 1:8 and dissolve them in water, mix the mixed solution with 13mg / L carbon quantum dot solution at a volume ratio of 3:1, stir at 65~69°C for 6h, and then...

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PUM

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Abstract

The present invention relates to a composite titanium dioxide nano-sheet photocatalyst, a preparation method and applications thereof, wherein the composite titanium dioxide nano-sheet photocatalyst comprises, by weight, 0.01-0.02% of carbon quantum dots, 39.44-70.73% of carbon nitride, and 29.25-60.55% of titanium dioxide. According to the present invention, titanium tetraisopropanolate and melamine are respectively adopted as the titanium source and the nitrogen source, and the precursor synthesis method is used to compound the titanium dioxide, the carbon nitride and the carbon quantum dots, wherein the carbon quantum dot mass content is extremely low while the high photocatalytic activity is provided, and the product can be used in organic wastewater treatment and hydrogen production through water photodecomposition.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a composite titanium dioxide nanosheet photocatalyst, a preparation method and application thereof. Background technique [0002] In recent years, due to the influence of PM2.5, the air pollution index (AQI) of big cities has become the focus of deep concern of residents, which seriously threatens people's physical and mental health. Indoor environmental quality has attracted widespread attention and attention, and has gradually become a social hot spot. . Photocatalysis is currently the safest and cleanest environmental purification material in the world. It is widely used in Europe, America, Japan, South Korea and other regions. The purification project of the US space station, the marine oil pollution degradation project and the disinfection project of Japanese bus companies all use photocatalysis for treatment. [0003] Many studies have been carried out o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCY02E60/36
Inventor 钟兴施浙琪王建国庄桂林
Owner ZHEJIANG UNIV OF TECH
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