Abstract A new precursor was developed for the preparation of graphitic carbon nitride (g-C3N4) with a large specific surface area and N vacancies. The SEM and TEM results show that the obtained samples have porous nanosheet structure, XPS, EPR and UV–Vis spectra indicate N vacancy defects existed in the g-C3N4. During the synthesis process, glyoxylic acid inhibited the condensation of melamine, thus increasing the porosity of g-C3N4, generating abundant defects, and improving yield. Under light irradiation, g-C3N4 samples prepared by glyoxylic acid mediated melamine shown enhanced photocatalytic activities in gaseous organic pollution photodegradation. This study developed a potential agent for producing inexpensive and highly active g-C3N4 photocatalysts.

中文翻译：

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使用乙醛酸介导的三聚氰胺制备具有增强光催化活性的高比表面积缺陷g-C3N4纳米片

摘要 开发了一种新的前驱体，用于制备具有大比表面积和 N 空位的石墨氮化碳 (g-C3N4)。SEM 和 TEM 结果表明所得样品具有多孔纳米片结构，XPS、EPR 和 UV-Vis 光谱表明 g-C3N4 中存在 N 空位缺陷。在合成过程中，乙醛酸抑制了三聚氰胺的缩合，从而增加了g-C3N4的孔隙率，产生了大量缺陷，提高了产率。在光照射下，由乙醛酸介导的三聚氰胺制备的 g-C3N4 样品在气态有机污染光降解中显示出增强的光催化活性。该研究开发了一种潜在的试剂，可用于生产廉价且高活性的 g-C3N4 光催化剂。