Copolymerization modified graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst
A graphitic carbon nitride, copolymerization technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, hydrogen production, etc., can solve the problem of ineffective use of sunlight and excitons The problems of high energy and large forbidden band width can achieve good controllability and universality, simple preparation process, and the effect of reducing the band gap width.
Active Publication Date: 2013-09-04
FUZHOU UNIV
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Problems solved by technology
Although g-C 3 N 4 Some progress has been made in the field of photocatalysis, but there are still defects that cannot be ignored: such as small specific surface area, high exciton binding energy for generating photogenerated carriers, low quantum efficiency...
Method used
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Embodiment 1
[0021] Dissolve urea and barbituric acid with a mass ratio of 25:1 in water, stir at room temperature for 48 hours, evaporate to dryness, and grind. The solid powder was heat-treated at 450° C. for 10 h in a muffle furnace to prepare copolymerized modified graphitic carbon nitride nanosheets.
Embodiment 2
[0023] Dissolve urea and 2-aminobenzonitrile with a mass ratio of 100:1 in water, stir at room temperature for 24 hours, evaporate to dryness, and grind. The solid powder was heat-treated in a muffle furnace at 500° C. for 5 h to prepare copolymerized modified graphitic carbon nitride nanosheets.
Embodiment 3
[0025] Dissolve urea and 2-aminothiophene-3-carbonitrile with a mass ratio of 1000:1 in water, stir at room temperature for 12 hours, evaporate to dryness, and grind. The solid powder was heat-treated at 550° C. for 2 h in a muffle furnace to prepare copolymerized modified graphitic carbon nitride nanosheets.
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The invention discloses a copolymerization modified graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst as well as a preparation method and an application thereof, and belongs to the technical field of material preparation and photocatalysis. The graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst which adopts a nanosheet structure and synthesized with a copolymerization method is formed by taking urea and different small organic molecule monomers as precursors through the high-temperature copolymerization action. The prepared graphite-phase carbon nitride has a lower-dimension nanosheet microstructure and a proper band gap; compared with conventional bulk-phase carbon nitride, the graphite-phase carbon nitride effectively increases the specific surface area, enhances the utilization rate of sunlight, and has efficient photocatalysis hydrogen production performance in visible light. According to the copolymerization modified graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst, the synthetic process is simple, the cost is low, the catalytic efficiency is high, the actual production requirements are met, and the photocatalyst has broad application prospects in the field of photocatalysis.
Description
technical field [0001] The invention belongs to the technical field of material preparation and photocatalysis, and in particular relates to a copolymerized modified graphite phase carbon nitride nanosheet visible light catalyst and its preparation method and application. Background technique [0002] An important issue in today's energy and environment is to use solar energy to simulate natural photosynthesis to split water to produce clean energy such as hydrogen. Photocatalytic technology is a potential ideal solution. However, the low utilization rate of solar energy, the easy deactivation of photocatalysts, and the high cost of use restrict the application of photocatalysts in industrial production. Therefore, the preparation of efficient, stable, and nontoxic materials as visible light catalysts is a core challenge in this field. [0003] In recent years, a non-metallic polymer semiconductor - graphitic carbon nitride (g-C 3 N 4 ), has been used to catalyze the spl...
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Login to view more IPC IPC(8): B01J31/06C01B3/04
CPCY02E60/36
Inventor 王心晨张明文任禾张金水
Owner FUZHOU UNIV
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