【大学化学】doi: 10.3866/PKU.DXHX202310063
科学仪器在科学研究和实验教学中发挥着重要作用,推动着科技创新。本文将青蒿素提取与鉴定实验加以改进,作为本硕贯通实验项目。实验过程中引入并应用现代仪器原理提取黄花蒿中的有效成分,测定青蒿素含量,纯化青蒿素,分析青蒿素结构。将天然产品的提取、分析、分离和鉴定结合起来,提高了学生学习兴趣,学习了天然产物的前沿实验技术,培养了创新意识,训练了科研思维。
【大学化学】doi: 10.12461/PKU.DXHX202411009
在为强基计划本科生开展的仪器分析实验课程中,利用交互式电子课件作为实验课程的课前学习材料,将线上学习与线下学习相结合,有针对性地为学生开展高阶学习内容,激发了学生学习的积极性,提高了学生的实验技能,培养了学生的科研创新思维,为本硕贯通仪器分析实验课程提供了建设数字化课程资源的新途径。
【无机化学学报】doi: 10.11862/CJIC.20240219
A simple two-step hydrothermal method synthesized four different CdS/Fe3O4 photocatalysts with varying ratios of mass of CdS to Fe3O4. The composition and morphology of the prepared samples were investigated using X-ray diffraction (XRD), Raman spectrum, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Solid UV reflectance spectra testing found that CdS/Fe3O4 nanocomposites had good light absorption throughout the spectral range, promoting their photocatalytic properties. Under visible light irradiation, CdS/Fe3O4 (2:5) with a mass ratio of 2:5 exhibited excellent photocatalytic performance, with a degradation rate of 98.8% for rhodamine B. Furthermore, after five cycles of photocatalytic degradation reaction, the rhodamine B degradation rate remained at 96.2%, indicating that the photocatalysts have good photocatalytic stability.