In this paper, polymeric graphitic carbon nitride (pgCN) with disordered in-plane and ordered inter-plane structure was prepared via a two-step method of low-temperature solvothermal synthesis and post-calcination, using dicyandiamide and cyanuric chloride mixture as raw materials and acetonitrile as solvent. Disordered in-plane structure of the pgCN was confirmed by X-ray diffraction (XRD), transmission electron microscope (TEM) and electron diffraction (ED). The microstructure, chemical states, bandgap, charge migration and photocatalytic performance of the pgCN were compared with that of classic bulk graphitic carbon nitride (bulk g-C₃N₄) obtained from melamine by calcination and its post-hydrothermal product. The pgCN showed highly efficient in both the photodegradation of Rhodamine B (RhB) and hydrogen evolution reaction (HER) benefiting from disordered–ordered hybrid plane structure which can inhibit photoelectron recombination and provide higher charge separation efficiency. Under visible light irradiation, the average HER rate of pgCN could reach 4541 μmol h⁻¹ g⁻¹, which is 18.2 times higher than that of bulk g-C₃N₄ crystal.

中文翻译：

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杂化有序杂化平面的聚合物石墨氮化碳的低温溶剂热煅烧制备及增强的光催化性能

本文采用双氰胺和氰尿酰氯混合物为原料，通过低温溶剂热合成和后煅烧两步法，制备了无序面内和有序面内结构的高分子石墨碳氮化物（pgCN）。以乙腈为溶剂。pgCN的无序面内结构通过X射线衍射（XRD），透射电子显微镜（TEM）和电子衍射（ED）确认。将pgCN的微观结构，化学状态，带隙，电荷迁移和光催化性能与经典的本体石墨氮化碳（bulk gC ₃ N ₄），是由三聚氰胺经煅烧得到的，及其后的水热产物。pgCN在罗丹明B（RhB）和氢释放反应（HER）的光降解中均表现出很高的效率，得益于无序有序杂化平面结构，该结构可以抑制光电子重组并提供更高的电荷分离效率。在可见光照射下，pgCN的平均HER率可达到4541μmolh ^-1  g ^-1，是块状gC ₃ N ₄晶体的18.2倍。