Abstract
Graphite carbon nitride has been developed for more than 10 yr since it was proposed in 2009. Due to its simple preparation process and good photocatalytic effect under visible light irradiation, the material has always been a hot research topic. In the past ten years, various g-C3N4 photocatalyst and its composite materials were prepared. Although these materials are diverse, they are made from only four kinds of raw materials, namely urea, thiourea, melamine and dicyandiamide. Starting from the most basic raw materials, the purpose of this experiment is to explore the differences in structure and properties of g-C3N4 synthesized from different raw materials. The experiment result expresses that the surface of the samples prepared by melamine and dicyandiamide is smooth, and the particles on the surface of the constituent materials are relatively large under the microscopic view, which is not conducive to the migration of photogenerated electrons and holes to the surface for reaction. The surface of the sample fired with urea and thiourea is rough and porous. The samples fired by urea and thiourea have rough and porous surfaces. The surface is composed of many small particles. When light irradiates the surface and generates carriers, the distance from the carriers to the surface becomes shorter, which reduces recombination and makes it more conducive to photocatalytic reactions.
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Cao, L., Li, Y. & Zheng, Z. Influence of Different Nitrogen-Enriched Precursors on the Structure and Properties of g-C3N4. Russ. J. Phys. Chem. 96, 1112–1123 (2022). https://doi.org/10.1134/S0036024422050193
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DOI: https://doi.org/10.1134/S0036024422050193