| 孙校华,张学文,王非,许杰,薛冰.无金属组分的氮化碳材料催化CO2合成碳酸丙烯酯[J].分子催化,2024,38(5):409-417 |
| 无金属组分的氮化碳材料催化CO2合成碳酸丙烯酯 |
| Synthesis of Propylene Carbonate from CO2 Catalyzed by Metal-free Carbon Nitride |
| 投稿时间：2024-07-20 修订日期：2024-08-20 |
| DOI：10.16084/j.issn1001-3555.2024.05.002 |
| 中文关键词: 氮化碳 环碳酸酯 CO2环加成反应 |
| 英文关键词:g-C3N4 cyclic carbonate CO2 cycloaddition reaction |
| 基金项目:国家自然科学基金项目(22278041); 中国石油—常州大学创新联合体科技创新人才项目(CCIA2023-02)(National Natural Science Foundation of China (22278041); China National Petroleum—Changzhou University Innovation Consortium Science and Technology Innovation Talent Project (CCIA2023-02)). |
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| 中文摘要: |
| 以二氰二胺为前驱体, 经热聚和热剥离制备了剥离石墨相氮化碳(eg-C3N4)材料, eg-C3N4再经H2SO4处理制得了eg-C3N4-S材料. 采用N2-吸脱附、X射线衍射、傅里叶红外光谱、X射线光电子能谱和紫外-可见漫反射等方法对材料的孔结构、化学组成等理化性质进行了表征. 结果显示, 热剥离有效地提高了g-C3N4的比表面积, 而H2SO4处理引入了羟基. 在CO2和环氧丙烷环加成合成碳酸丙烯酯的催化反应中, eg-C3N4-S材料相较于未经H2SO4处理或未经热剥离的g-C3N4材料具有更高的催化活性. 在反应压力为2.0 MPa, 反应温度为140 ℃条件下, 环氧丙烷的转化率和碳酸丙烯酯选择性分别为85%和98%. |
| 英文摘要: |
| The exfoliated graphitic carbon nitride (eg-C3N4) material was synthesized by thermal polymerization and thermal exfoliation using dicyanodiamide as a precursor, and the eg-C3N4-S materials were prepared by treatment of H2SO4. The physicochemical properties, including porous structure, chemical compositions etc., of the materials were characterized by N2 adsorption-desorption, XRD, FT-IR, XPS and UV-Vis spectroscopy. The characterization results showed that exfoliation effectively increased the specific surface area of g-C3N4, while H2SO4 treatment introduced hydroxyl group. In the catalytic reaction of cycloaddition of CO2 with propylene oxide to propylene carbonate, eg-C3N4-S showed higher catalytic activity than g-C3N4 without H2SO4 treatment or thermal exfoliation. Under the reaction pressure of 2.0 MPa and temperature of 140 ℃, the propylene oxide conversion and propylene carbonate selectivity were 85% and 98%, respectively. |
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