Carbon-nitrogen alkene photocatalyst and preparation method thereof

A photocatalyst and carbenene technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as unfavorable electron-hole separation, low photocatalytic activity, etc., and achieve high application prospects And the effect of practical value, simple process and cheap raw materials

Inactive Publication Date: 2013-03-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

C 3 N 4 As a new type of visible light non-metallic photocatalyst, it has good application prospects, but its properties are similar to those of polymers, which is not conducive to the separation of electrons and holes, making its own photocatalytic activity low.

Method used

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  • Carbon-nitrogen alkene photocatalyst and preparation method thereof
  • Carbon-nitrogen alkene photocatalyst and preparation method thereof
  • Carbon-nitrogen alkene photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, chemical exfoliation prepares carbazene

[0028] Weigh 2.0g C 3 N 4 Put it in a 50mL beaker, then add 20mL of 98% concentrated sulfuric acid, mix and stir the two at room temperature on an electromagnetic stirrer for 8 hours, then pour the mixed liquid into a beaker with 100mL deionized water for dilution. Put it into a centrifuge tube for centrifugation, and the precipitate obtained after centrifugation is washed several times with deionized water until the pH is close to neutral, then transferred to a petri dish, placed in a constant temperature oven, and dried at 80°C. The finally obtained white solid powder is For carbon nitrogen.

[0029] The structural test of the carbazene prepared in this embodiment was carried out on a German Bruker D8Advance X-ray diffractometer (XRD) (CuKα ray, λ=0.154nm, voltage 40kV, current 40mA), and its XRD pattern is as follows figure 1 shown. Depend on figure 1 It can be seen that C 3 N 4 The 100 crystal plane on t...

Embodiment 2

[0036] Embodiment 2, the photoelectric performance test of carbonitrone

[0037] (1) Preparation of carbon nitrogen film electrode

[0038] Ultrasonic disperse 2 mg of carbazene powder in 1 mL of water, make a slurry, and spread it on a 4 cm × 2 cm ITO conductive glass by dip coating method. After the sample is dried, it is heated at 200°C for 5 hours to make a thin film electrode, and the film has a certain mechanical strength by heating.

[0039] (2) Evaluation of photoelectric properties of carbonitrone

[0040] Use methylene blue dye (MB) as the target degradation product, and the initial concentration in 100mL is 1*10 -550mg of photocatalyst was added to mol / L MB solution, and the catalytic activity of carbazene photocatalyst was investigated under the irradiation of ultraviolet light and visible light. The ultraviolet light adopts 11W low-pressure mercury lamp, the main wavelength is 254nm, and the light intensity is 0.9mW / cm 2 . Visible light uses a 500W xenon lamp...

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Abstract

The present invention discloses a carbon-nitrogen alkene photocatalyst and a preparation method thereof. The method comprises the following steps: (1) dispersing carbon nitride in concentrated sulfuric acid and stirring to obtain a mixed liquid; (2) adding deionized water to the obtained mixed liquid to obtain a diluted solution; and (3) carrying out centrifugation on the diluted solution, and adopting deionized water to wash the obtained precipitate after centrifugation to achieve a neutral state to obtain the carbon-nitrogen alkene photocatalyst. The single-layer sheet-like structure carbon-nitrogen alkene photocatalyst prepared by the preparation method has good performances of photocatalysis degradation of pollutants and photocurrent response. The preparation method has characteristics of inexpensive raw materials, simple process and effectively reduced product cost, is suitable for industrial mass production, and has high application prospects and practical values.

Description

technical field [0001] The invention relates to a carbanitrone photocatalyst and a preparation method thereof, belonging to the technical field of photocatalytic materials and preparation methods thereof. Background technique [0002] g-C 3 N 4 (g-C 3 N 4 marked C 3 N 4 ) is a material with conjugated large π bonds, which has good chemical stability and thermal stability, and has attracted widespread attention because of its special mechanical, electronic and optical properties. Since Nature Materials reported C in 2009 3 N 4 After photolysis of water to produce hydrogen under visible light conditions, it has quickly become a hot spot in photocatalytic research in recent years. A series of studies have been carried out on it, including photolysis of water to produce hydrogen, degradation of organic dyes, organic reactions, etc. C 3 N 4 As a new type of visible-light non-metallic photocatalyst, it has good application prospects, but its properties are similar to tho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
Inventor 朱永法徐婧石睿
Owner TSINGHUA UNIV
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