A novel highly ordered three dimensional mesoporous graphitic carbon nitride (MGCN-6) with C₃N₄ stoichiometry having amorphous wall structure, tunable textural parameters with body-centered cubic Ia3d framework has been prepared from 3D mesoporous silica, KIT-6 with adjustable pore diameters as hard templates through a temperature-induced poly condensation followed by the polymerization reaction of cyanamide (CNNH₂) precursor. The structure of the resulting mesoporous graphitic carbon nitride materials consists of sheets of three-dimensionally arranged s-heptazine units that are held together by covalent bonds between C and N atoms. The realized MGCN-6 materials have been thoroughly characterized using various techniques such as powder X-ray diffraction (XRD), N₂ physisorption, high-resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), UV–vis and Fourier transform infrared (FT-IR) spectroscopy, and elemental analysis. The characterization data reveal that the resultant materials possess a well-defined ordered three-dimensional porous structure with a high surface area and a large pore volume. The catalytic activity of these materials has been tested in the Knoevenagel condensation between benzaldehyde and malononitrile. This catalyst is found to be highly active and shows a high conversion with 100% product selectivity even at room temperature.

用3D介孔二氧化硅，孔度可调的KIT-6制备了具有无定形壁结构，体心立方Ia3d骨架可调结构参数的C ₃ N ₄化学计量的新型高度有序的三维介孔石墨碳氮化物（MGCN-6）。通过温度诱导的缩聚反应，然后进行氰酰胺（CNNH ₂）的前体。所得的中孔石墨碳氮化物材料的结构由三维排列的S-庚嗪单元薄片组成，这些薄片通过C和N原子之间的共价键结合在一起。使用各种技术（例如粉末X射线衍射（XRD），N ₂物理吸附，高分辨率透射电子显微镜（HRTEM），场发射扫描电子显微镜（FESEM），X射线光电子能谱（XPS），紫外可见和傅里叶变换红外（FT-IR）光谱以及元素分析。表征数据表明，所得材料具有高表面积和大孔体积的明确定义的有序三维多孔结构。这些材料的催化活性已在苯甲醛和丙二腈之间的Knoevenagel缩合反应中进行了测试。发现该催化剂是高活性的，甚至在室温下也显示出高转化率和100％的产物选择性。