Abstract

Materials based on graphitic carbon nitride (g-C₃N₄) are intensely studied as promising photocatalysts of different reactions, hydrogen peroxide formation including. Effect of synthesis parameters of g-C₃N₄ obtained by thermolysis of melamine, urea, and thiourea on its composition and photocatalytic activity has been studied. The photocatalytic activity of obtained materials has been studied in the reaction of oxidative decomposition of organic dye and in oxygen reduction to form hydrogen peroxide. It has been shown that, in spite of incomplete polycondensation after thermolysis, the obtained samples display high values of photocatalytic activity. The work has shown that the photocatalytic activity of samples obtained at 550°С is by factor 2–4 higher than that for samples obtained at 500 and 600°C. It has been shown that the preparation of g-C₃N₄ from thiourea in air leads to photocatalyst with maximal activity, whereas melamine and urea produce the best catalyst under nitrogen atmosphere.

中文翻译：

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石墨氮化碳合成气氛对其光催化产过氧化氢活性的影响

摘要

基于石墨氮化碳 (gC ₃ N ₄ ) 的材料作为不同反应（包括过氧化氢形成）的有前途的光催化剂被深入研究。gC ₃ N _{4合成参数的影响}研究了三聚氰胺、尿素和硫脲热解制得的三聚氰胺的组成和光催化活性。在有机染料的氧化分解反应和氧还原形成过氧化氢的反应中，研究了所得材料的光催化活性。已经表明，尽管热解后缩聚不完全，但所得样品显示出高光催化活性值。工作表明，在 550°С 下获得的样品的光催化活性比在 500 和 600°C 下获得的样品高 2-4 倍。已经表明，gC ₃ N _4的制备从空气中的硫脲产生的光催化剂具有最大的活性，而三聚氰胺和尿素在氮气氛下产生最好的催化剂。