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.

“新医科”是一种从治疗为主到兼具预防、治疗、康养的生命健康全周期的医学新理念。本文依据“新医科”理念，针对《医学基础化学实验》教材中的“氧化还原反应和电极电位”部分实验进行了“医学-化学-生物”等学科的交叉、融合与创新，具体有：(1) 电池电动势的测量实验中用乙二胺四乙酸钠(Na₄Y)代替浓氨水，实现样品体系中Cu²⁺/Zn²⁺浓度的变化；(2) 氧化还原反应与电极电位的关系实验中用维生素C (Vc)的C₆H₆O₆ (氧化型)/C₆H₈O₆ (还原型)电对替代Br₂/Br⁻电对，实现不同电对氧化还原性质的对比研究；(3) 增设谷胱甘肽还原Fe³⁺的实验，实现医学热点—细胞铁死亡过程的跨界思考。通过系列改进使实验变得绿色环保和医教结合，对诠释基础化学中的“新医科”理念具有重要意义。

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。