Zhao Yun, Jiang Yan, He Menglu, Jiang Gang, Zhu Xuguang, Tian Yue, Ni Zhonghai
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
Institute of New Carbon Materials, Taiyuan University of Technology, Taiyuan 030024, China.
Nanoscale. 2021 Sep 17;13(35):14847-14853. doi: 10.1039/d1nr04315c.
Black phosphorus (BP), a new 2D material as a layered allotrope of phosphorus, has regained attention due to its outstanding semiconductor characteristics. However, the major hurdles of using few-layer BP for applications are its poor solution processability and low ambient stability. Here, we report a covalent modification of BP nanosheets by a chemical reaction with sodium alkoxide. Fourier transform infrared spectra, Raman spectra, X-ray photoemission spectra and thermogravimetric analyses all confirmed the successful introduction of alkoxy groups on the BP surface with P-O-C bonds, which increased the solubility and ambient stability of BP. The introduced alkoxy groups as soluble side chains on the BP surface not only increase the solubility of BP nanosheets by almost 3 times, but also decrease the degradation ratio of the modified BP by about 2 times because of the encapsulation. In this work we developed a facile synthetic strategy to covalently modify BP by introducing soluble side chains, suggesting an effective way to realize its full potential application in electronics.
黑磷（BP）作为磷的一种层状同素异形体，是一种新型二维材料，因其出色的半导体特性而重新受到关注。然而，将少层黑磷用于实际应用的主要障碍是其较差的溶液可加工性和较低的环境稳定性。在此，我们报道了通过与醇钠发生化学反应对黑磷纳米片进行共价修饰。傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱和热重分析均证实了在黑磷表面成功引入了带有P-O-C键的烷氧基，这提高了黑磷的溶解性和环境稳定性。引入的烷氧基作为黑磷表面的可溶性侧链，不仅使黑磷纳米片的溶解度提高了近3倍，而且由于其封装作用，使改性黑磷的降解率降低了约2倍。在这项工作中，我们开发了一种通过引入可溶性侧链对黑磷进行共价修饰的简便合成策略，为实现其在电子学领域的全面潜在应用提供了一种有效方法。
