科学仪器自搭建实验的课程思政设计——以教学质谱仪的搭建、调试及应用为例
邓顺柳, 苏海峰, 朱亚先, 王玉枝, 翁玉华, 陈招斌, 彭淑女, 吕银云, 洪歆怡, 王翊如, 黄晓, 林志敏, 郑兰荪
【大学化学】doi: 10.3866/PKU.DXHX202308002
培养能够开展科学仪器原理创新、设计制造、应用开发的高端人才已成为建设人才强国、科技强国的必然要求。本案例在本科实验中引入我国科学家自主研制的教学质谱仪,采用学生亲自动手拆装、调试及应用的方式,深化学生对质谱仪工作原理、构造和相关分析方法的认识,破除对“高端仪器”的神秘感和畏难情绪,激发学生研制科学仪器的兴趣,培养敢于挑战自我、勇于自主创新的意志品质,坚定科技报国、服务国家的家国情怀。
关键词: 教学质谱仪, 组装, 调试, 课程思政
Construction of AgVO3/ZIF-8 composites for enhanced degradation of tetracycline
Min ZHU, Yuxin WANG, Xiao LI, Yaxu XU, Junwen ZHU, Zihao WANG, Yu ZHU, Xiaochen HUANG, Dan XU, Monsur Showkot Hossain Abul
【无机化学学报】doi: 10.11862/CJIC.20240392
AgVO3/ZIF 8 composites with enhanced photocatalytic effect were prepared by the combination of AgVO3 and ZIF-8. X-ray diffraction (XRD), scanning electron microscopy (SEM), high-power transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), photoluminescence (PL) spectroscopy, electron spin resonance (ESR) spectroscopy, transient photocurrent and electrochemical impedance spectroscopy (EIS) were used to characterize binary composites. Tetracycline (TC) was used as a substrate to study the performance efficiency of the degradation of photocatalysts under light conditions, and the degradation effect of TC was also evaluated under different mass concentrations and ionic contents. In addition, we further investigated the photocatalytic mechanism of the binary composite material AgVO3/ZIF-8 and identified the key active components responsible for the catalytic degradation of this new photocatalyst. The experimental results show that the degradation efficiency of 10% AZ, prepared with a molar ratio of 10% AgVO3 and ZIF-8 to TC, was 75.0%. This indicates that the photocatalytic activity can be maintained even under a certain ionic content, making it a suitable photocatalyst for optimal use. In addition, the photocatalytic mechanism of binary composites was further studied by the active species trapping experiment.
关键词: AgVO3, ZIF-8, metal-organic framework, photocatalysis, tetracycline
LiNbO3负极薄膜电化学性能及全固态薄膜锂离子电池应用
胡雪晨, 夏求应, 岳钒, 何欣怡, 梅正浩, 王金石, 夏晖, 黄晓
【物理化学学报】doi: 10.3866/PKU.WHXB202309046
全固态薄膜锂离子电池具有易微型化与集成化等优点,因此,非常适合为微系统供电。负极对全固态薄膜锂离子电池的性能有重要影响。现有电池通常采用金属锂作为负极,然而其枝晶生长问题及低的热稳定性限制了相应电池在工业、军事等高温、高安全场合应用。为此,本文系统研究了LiNbO3薄膜的电化学性能,结果表明:LiNbO3薄膜呈现高比容量(410.2 mAh·g−1)、高倍率(30C时比容量80.9 mAh·g−1)和长循环性能(2000圈循环后的容量保持率为100%),以及高的室温离子电导率(4.5 × 10−8 S·cm−1)。在此基础上,基于LiNbO3薄膜构建出全固态薄膜锂离子电池Pt|NCM523|LiPON|LiNbO3|Pt,其展现出较高的面容量(16.3 μAh·cm−2)、良好的倍率(30 μA·cm−2下比容量1.9 μAh·cm−2)及长循环稳定性(300圈循环后的容量保持率为86.4%)。此外,该电池表现出优秀的高温性能,连续在100 ℃下工作近200 h的容量保持率高达95.6%。研究表明:LiPON|LiNbO3界面不论在充放电循环还是高温下均非常稳定,这有助与提升全电池综合性能。
关键词: 全固态锂离子电池, LiNbO3薄膜, 负极, 界面, 高温, 稳定性

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