Copolymerization modified graphite-phase carbon nitride nanosheet visible-light-driven photocatalyst

Abstract

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...

AI Technical Summary

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 and large band gap, which cannot be effectively using sunlight etc.

However, using urea, a cheap chemical raw material, as the carbon nitride precursor, the copolymerization method was introduced into the nanosheet g-C 3 N 4 research work has not yet been reported

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