有序介孔石墨相氮化碳的合成及催化Knoevenagel缩合研究

Preparation of Ordered Mesoporous Carbon Nitride and Its Catalytic Performance for Knoevenagel Condensation

以二氰二胺为前驱体,不同晶化温度的SBA-15为硬模板,用纳米浇铸法合成了一系列比表面和孔体积可调的介孔石墨相氮化碳(CND-SBA15)。通过N2吸-脱附、TEM、小角XRD、XPS、FT IR、CO2-TPD等手段研究了材料的织构、微观形貌、孔结构的有序性、化学组成和碱性质等。在以苯甲醛和丙二腈为底物的Knoevenagel缩合反应中,CND-SBA15材料表现出了很好的催化活性和稳定性。

A series of mesoporous graphitic carbon nitride materials （CND-SBA15） with tunable surface areas and pore volumes have been prepared using dicyandiamide as a precursor and SBA-15 samples as templates under different hydrothermal temperatures. The textual properties, microscopic morphology, porous orderness, chemical compositions, and basic properties of CND-SBA15 materials were characterized by N2 adsorption-desorption, TEM, small angle XRD, XPS, FT-IR, and CO2-TPD. It has been demonstrated that CND-SBA15 materials exhibit high activity and stability for catalyzing Knoevenagel condensation reaction between benzyl aldehyde and malononitrile.