源起于发霉甜苜蓿，脱胎于生化实验室，华法林先生起初作为一种强力灭鼠毒药大杀四方。然而，在进入医药领域的道路上，他却因毒药的身份标签和种种流言而饱受质疑和反对。科学家们揭示了华法林抗凝血的机制，并证明了华法林抗凝治疗对患者的益处。从此，华法林先生以及他的衍生物们成为了抗凝治疗和防治鼠害的前线战士。

笔者在大学入学之初就受教于华彤文老师，后来跟随华老师做研究、搞教学、写教材，直至担任《大学化学》主编时依然听取华老师的教诲。在此文中分享40余年来近距离观察、感受和学习华老师严谨治学、勇于担当的教学与研究的态度和方法，期待我国的化学教育教学事业薪火相传，持续发展。

高效灭藻与生态安全之间的矛盾是光催化治理有害藻华(HABs)的关键瓶颈。传统铜基光催化剂虽具有灭藻效果，但常引发严重的二次污染与水生态毒性。为解决这一矛盾，我们通过将LaCoO₃ (LCO)钙钛矿八面体共价锚定于2,4,6-三羟基苯-1,3,5-三甲醛(TP)和2,5-二氨基-1,4-苯二硫醇二盐酸盐(DABDT)溶剂热聚合而成的PTP-DABDT酰胺-亚胺功能骨架上，构建了具有生物安全性的S型异质结光催化材料。飞秒瞬态吸收光谱(fs-TA)和原位光照X射线光电子能谱(XPS)等证实了内建电场(IEF)的形成。该电场驱动超快S型电荷转移，在保持强氧化还原电势的同时能够有效抑制载流子复合。因此，改良后的20LCO/PTP-DABDT复合材料展现出优异的“杀藻-净化”协同性能：在铜绿微囊藻中实现64.39%叶绿素a降解以抑制藻华增殖，同时降解藻细胞释放的微囊藻毒素。更重要的是，对比毒性分析揭示了范式转变——传统铜基杀藻剂会导致非靶标生物(花鲈)100%死亡，而本体系存活率始终高于90%。本研究提出开创性的“生态调控”策略，为兼顾高效灭藻与环境生物安全性提供了可持续解决方案。

Polyhedral bismuth vanadate (BVO) material was prepared using a straightforward hydrothermal method, and then a small-sized AgNi bimetallic co-catalyst was synthesized in situ on the surface of the polyhedral BVO through a chemical reduction method. The photocatalytic performance of the catalyst was studied. The physicochemical properties of the prepared AgNi/BVO material were characterized through various techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, and nitrogen adsorption-desorption analysis. The results indicated that AgNi bimetallic co-catalysts were extensively loaded onto the unique morphology of BVO polyhedra, significantly increasing the metal attachment sites. Simultaneously, the AgNi loading also improved the crystallinity of BVO. The silver surface plasmon resonance effect, in conjunction with the nickel's lattice interface effect, enhanced the BVO catalyst's absorption of visible light and improved the separation of photo-generated electrons, thereby increasing the photocatalytic activity. Photocatalytic degradation experiments using MB (methylene blue) as a model pollutant demonstrated that when the ratio was 3:1, AgNi/BVO exhibited the highest catalytic activity, with a reaction rate of 5.4 times higher than that of BVO under visible light irradiation. This photocatalyst retained excellent photocatalytic activity even after four cycles of use.

首先采用柠檬酸辅助溶胶-凝胶法制备钴酸镧(LaCoO₃，LCO)，并利用水热法制备LaCoO₃/g-C₃N₄(LCO/CN)p-n型异质结复合光催化剂。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、紫外可见漫反射光谱(UV-Vis DRS)和光致发光(PL)光谱对LCO/CN进行了表征，评价了其对盐酸四环素(TC)的光催化降解性能，同时使用自由基捕获剂验证了光催化反应中起作用的活性基团，并推测了反应机理。结果表明，LCO和CN的复合显著增强了CN的光催化活性，当二者质量比为10%时制备的10%LCO/CN呈现出最佳的光催化性能，在120 min内对10 mg·L^-1 TC的降解率高达96.2%，反应速率常数达到0.018 93 min^-1，分别是CN和LCO的3.04倍和1.93倍。3次循环回收实验结果显示，10%LCO/CN对TC的降解率下降得较少，表明该催化剂具有良好的稳定性和实用性。