李正名院士是我国著名的教育家、化学家和农药学家。在李先生逝世3周年之际，李正名奖学金捐赠暨首届颁奖仪式在南开大学举行。本文结合一部分典型的具体事例，对李正名先生的教育家精神和科学家精神进行了介绍，从中折射出他始终如一的坚定爱国信念和无私奉献精神。青年学子通过学习李先生的光辉事迹，可以深入了解老一辈科学家浓厚的家国情怀。本文有助于激励当代大学生厚植爱国主义理想与信念，增强自主创新意识和能力，立志为中华民族的伟大复兴贡献自己的全部力量。

构建表面无机-有机复合包覆层，用于改善高镍层状(NCM811)正极材料结构和界面不稳定问题。复合包覆层由纳米偏铝酸锂(LiAlO₂，LAO)和环化聚丙烯腈(cPAN)构成。该复合包覆层中LAO是一种典型的锂离子导体，可提供Li⁺迁移通道；PAN环化后，可产生离域的π键，形成具有电子导电性的cPAN。材料表面复合包覆层的结构及成分研究表明，该复合包覆层均匀分布在NCM811材料表面。半电池测试结果表明，在2.7~4.3 V(vs Li/Li⁺)电压范围内，在180 mA·g^-1电流密度下，改性后的NCM811材料循环150周后容量保持率为84.8%。而同样条件下，原始NCM811材料容量保持率为65.5%。该复合包覆层可有效提升NCM811结构和界面稳定性，减少电解液分解，降低界面阻抗。

In this study, sawdust served as a carbon source and urea as a nitrogen source to synthesize carbon- supported, nitrogen-doped TiO₂ composites via a one-pot solvothermal method. The composites were characterized using FTIR, powder X-ray diffraction, X-ray photoelectron spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, thermogravimetry-derivative thermogravimetry, scanning electron microscopy-energy dispersive spectroscopy, and transmission electron microscopy. Results indicated that all synthesized composites exhibit the anatase phase, with those calcined at 800 ℃ demonstrating enhanced crystallinity. Nitrogen is incorporated into the TiO₂ lattice, while carbon is predominantly located on the surface. Photodegradation experiments showed that 20 mg of composite N-TiO₂/C-800 achieved degradation rates of 93.4% for methylene blue (20 mg·L^-1, 50 mL) and 99.4% for oxytetracycline (20 mg·L^-1, 50 mL) within 30 min. Free radical capture experiments indicated that h⁺ was the primary active species in the photocatalytic degradation process.