【大学化学】doi: 10.12461/PKU.DXHX202412104
秉持“科教融汇、协同育人”理念,融合人工智能(AI)与生物化学教学研究。本文探讨了AI技术在生物化学教学改革中的应用,构建了与生物医学工程专业教学案例——AI预测基因突变的功能效应,从案例实施背景、教学内容设计、组织实施及效果评价等方面,阐述了该AI赋能教学的典型案例设计与实施,培养学生的多学科交叉融合的学习思维。
【无机化学学报】doi: 10.11862/CJIC.20230403
利用乙二胺-水蒸汽进行气相转化(VPT)制备超薄、取向MFI沸石膜,通过将MFI纳米片沉积层转化为致密的沸石膜,实现了膜厚度的有效控制。扫描电子显微镜和X射线衍射表明,制备的沸石膜膜厚度约为280 nm,具有高度b轴取向的致密结构。丁烷异构体双组分分离测试结果表明,在333 K下,等物质的量的正丁烷/异丁烷混合物的正丁烷渗透速率和分离因子分别为1.5×10-7 mol·m-2·s-1·Pa-1和14.8。Na2SiO3作为低聚硅源在MFI沸石纳米片二次生长过程中能够提供硅源和碱度,通过在胺类蒸汽中实现MFI沸石纳米片间的融合生长,进一步提高了膜的取向度和致密性。
【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.
【大学化学】doi: 10.12461/PKU.DXHX202406085
苯(C6H6)与二十面体硼烷(B12H122-)是具有π-和σ-芳香性分子的典型代表。本实验采用密度泛函理论(DFT)分别计算二者的分子轨道图及核独立化学位移值,引导学生了解计算化学研究芳香性的一般方法,构建对电子离域结构的直观认知。通过对比分析,帮助学生加深对芳香性的理解,达到巩固基础,拓宽视野,提升创新技能的目的。实验普适性好,易于推广。