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Preparation method and application of carbon nitrogen/titanium dioxide composite material

A technology of titanium dioxide and composite materials, applied in the direction of titanium dioxide, titanium oxide/hydroxide, material analysis using wave/particle radiation, etc., can solve the problems of affecting photoelectric detection, easy recombination of electrons and holes, etc.

Pending Publication Date: 2017-03-15
CHANGCHUN DINGCHENG TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrons and holes themselves are easy to recombine after illumination, which seriously affects the photodetection.

Method used

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  • Preparation method and application of carbon nitrogen/titanium dioxide composite material
  • Preparation method and application of carbon nitrogen/titanium dioxide composite material
  • Preparation method and application of carbon nitrogen/titanium dioxide composite material

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preparation example Construction

[0030] The invention provides a preparation method of carbon nitrogen / titanium dioxide composite material, comprising: mixing carbon nitride, trivalent titanium salt, hydrogen peroxide and anionic surfactant in water, heating and reacting to obtain an intermediate product; Calcined in a protective atmosphere to obtain a carbon nitrogen / titanium dioxide composite material.

[0031] The present invention has no special limitation on the sources of all raw materials, which can be commercially available or self-made.

[0032] Wherein, the carbon nitride can be carbon nitride well-known to those skilled in the art, and there is no special limitation. In the present invention, it is preferably prepared according to the following method: melamine is calcined at high temperature in a protective atmosphere to obtain carbon nitride.

[0033] According to the present invention, it is preferred to adopt temperature-programmed melamine to reach the temperature of high-temperature calcinati...

Embodiment 1

[0046] 1.1 Synthesis of ultrathin carbon nitride:

[0047] Weigh 2 grams of melamine and put it into a crucible, and heat it to 500°C under a nitrogen atmosphere (the heating rate of the temperature program is 2.5K min -1 ), held at constant temperature for 2 hours, then cooled to room temperature. Centrifuge and wash several times with methanol and secondary water respectively, and dry at 70°C for 12 hours to obtain bulk carbon nitride (abbreviated as bg-C 3 N 4 ). Ultrasonic disperse the obtained product into secondary water, let the solution settle naturally, then centrifuge to take the supernatant for later use, and obtain ultra-thin carbon nitride (utg-C for short). 3 N 4 );

[0048] 1.2 Synthesis of ultra-thin carbon-nitrogen / titanium dioxide composites:

[0049] 3 mg utg-C 3 N 4 and 1.5 mg of sodium dodecylsulfonate were dispersed in secondary water and stirred evenly for 1 hour. Next, 10 milliliters of titanium trichloride (0.6 mol per liter) and 5 milliliters...

Embodiment 2

[0060] 2.1 Synthesis of ultrathin carbon nitride:

[0061] Weigh 2 grams of melamine and put it into a crucible, and heat it to 530°C under a nitrogen atmosphere (the heating rate of the temperature program is 2.5K min -1 ), held at constant temperature for 2 hours, then cooled to room temperature. Centrifuge and wash several times with methanol and secondary water respectively, and dry at 70°C for 12 hours to obtain bulk carbon nitride (abbreviated as bg-C 3 N 4 ). Ultrasonic disperse the obtained product into secondary water, let the solution settle naturally, then centrifuge to take the supernatant for later use, and obtain ultra-thin carbon nitride (utg-C for short). 3 N 4 ).

[0062] 2.2 Synthesis of ultrathin carbon nitride / titanium dioxide composites:

[0063] 3 mg utg-C 3 N 4 and 2 mg of sodium dodecylsulfonate were dispersed in secondary water and stirred evenly for 1 hour. Next, 15 milliliters of titanium trichloride (0.6 mol per liter) and 5 milliliters of ...

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Abstract

The invention provides a preparation method of a carbon nitrogen / titanium dioxide composite material. The method comprises the following steps: mixing carbon nitride, titanous salt, oxydol and an anionic surfactant in water, and heating to react to obtain an intermediate product; and calcining the intermediate product in a protective atmosphere to obtain the carbon nitrogen / titanium dioxide composite material. Compared with the prior art, the titanium dioxide nanoparticles are grown on the carbon nitride in situ and calcinedin the protective atmosphere to convert the crystal form, so that the prepared carbon nitrogen / titanium dioxide composite material can be used as a photoelectric material for determining the antioxidant capacity of the antioxidant.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, in particular to a preparation method and application of a carbon nitrogen / titanium dioxide composite material. Background technique [0002] In photoelectrochemical sensing, semiconductors generate electrons and holes after being illuminated. Different semiconductors exhibit different reductibility (electrons) and oxidation (holes). Using these two properties of semiconductors can sense many substances. . However, the electrons and holes themselves are easy to recombine after illumination, which seriously affects the photodetection. [0003] Antioxidants can eliminate highly active free radicals in organisms and maintain the health of organisms. At present, the detection of antioxidant capacity of antioxidants has attracted more and more attention from researchers. The evaluation principle of photoelectrochemistry for anti-oxidation capacity is as follows: Light irradiates the ...

Claims

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Application Information

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IPC IPC(8): G01N21/63G01N23/227G01N23/20C01G23/08
CPCC01G23/08C01P2002/72C01P2002/80C01P2004/04G01N21/63G01N23/20G01N23/227
Inventor 牛利韩冬雪
Owner CHANGCHUN DINGCHENG TECH
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