Tsinghua University, Beijing, China.
Nanoscale. 2015 Aug 7;7(29):12284-90. doi: 10.1039/c5nr03481g. Epub 2015 Jul 7.
A facile and environmentally friendly method was developed for the fabrication of N-doped carbon nanomaterials by hydrothermal treatment using polyurethane (PU) sponge as a carbon source. We have demonstrated that the hydrothermal decomposition of PU sponge involves top-down hydrolysis and bottom-up polymerization processes for the synthesis of N-doped carbon dots (N-CDs). Fluorescence spectroscopy and cytotoxicity studies indicated that these highly-soluble N-CDs show excellent photoluminescence properties and low cytotoxicity, and can be used as good probes for cellular imaging. Additionally, the N-doped hollow carbon nanostructures can be designed using a simple template method. The prepared N-doped double-shelled hollow carbon nanotubes exhibited excellent ORR electrocatalytic activity and superior durability. Indeed, our method described here can provide an efficient way to synthesize N-doped carbon-based materials for a broad range of applications.
一种简便且环保的方法是通过水热处理使用聚氨酯（PU）海绵作为碳源来制备 N 掺杂碳纳米材料。我们已经证明，PU 海绵的水热分解涉及自上而下的水解和自下而上的聚合过程，用于合成 N 掺杂碳点（N-CDs）。荧光光谱和细胞毒性研究表明，这些高水溶性的 N-CDs 具有优异的光致发光性能和低细胞毒性，可用作细胞成像的良好探针。此外，可以使用简单的模板法设计 N 掺杂的中空碳纳米结构。所制备的 N 掺杂双层空心碳纳米管表现出优异的 ORR 电催化活性和卓越的耐久性。实际上，这里描述的方法可以为广泛的应用提供一种高效合成 N 掺杂碳基材料的方法。
