“铟硫得”——与尿酸的狭路相逢
李虹瑶, 刘友燕, 代璐微, 杨敏, 王琪慧
【大学化学】doi: 10.3866/PKU.DXHX202311104
尿酸是嘌呤在人体内代谢的最终产物,如果人们长期食用嘌呤含量高的食物或者不新鲜的各种肉类,使人体尿酸失衡,就容易导致血液中尿酸过高,引发一系列健康问题。本实验制备了一种新型Cd2In2S5纳米晶,将Cd2In2S5纳米晶与丝网印刷碳柔性电极结合,所得电极可用于尿酸检测。可通过检测尿酸含量来监测人体健康状况以及判断肉类新鲜程度。本实验创新性的将神奇的纳米材料走向市场,让中小学生、大学生、社会人群都能明白尿酸检测原理。实验所用材料便宜易得,操作简单,可实现尿酸的居家检测。
关键词: 监测人体健康, 尿酸检测, 科普, Cd2In2S5纳米晶, 判断肉类新鲜度
荧光“变色”——基于动态发光的科普实验方案
衣梓硕, 刘鹏, 徐燕
【大学化学】doi: 10.12461/PKU.DXHX202311079
制备无毒的ZnGa2O4:Bi3+荧光材料,其同时具备可调多色荧光、动态光致变色及热致变色的三模式发光性质。我们利用这种类似“变色龙”的荧光特性设计了三种信息安全实施方案,实验互动性强且具有趣味性,有良好的科普实践展示效果,有助于激发学生对化学学科的学习热情,进而帮助青少年体会“美丽化学”的丰富内涵。
关键词: 动态荧光, 光致变色, 热致变色, 科普实验, 防伪
Green synthesis of MIL-101/Au composite particles and their sensitivity to Raman detection of thiram
Huihui LIU, Baichuan ZHAO, Chuanhui WANG, Zhi WANG, Congyun ZHANG
【无机化学学报】doi: 10.11862/CJIC.20240059
Metal-organic framework (MOF) MIL-101 and surface plasmon polariton (SPP) supported gold nanoparticles (Au NPs) hybrid systems were developed as a highly sensitive and reproducible surface-enhanced Raman scattering (SERS) detection platform, in which a green electrostatic self-assembly technology was adopted to construct the substrate. In an aqueous solution, the electronegativity of the particles can be used to prepare the composite substrate without any surface modifier. Due to the enrichment capacity of MIL-101 and the electromagnetic enhancement from Au NPs, the well-designed MIL-101/Au composites possessed ultrahigh sensitivity with the detection limit of Rhodamine 6G (R6G) as low as 10-10 mol·L-1. Meanwhile, the substrate exhibits high stability, excellent reproducibility, and recyclability. Additionally, the novel substrate can be explored for direct capture, and sensitively detect pesticide residues such as thiram.
关键词: MIL-101, Au nanoparticle, surface-enhanced Raman scattering, thiram

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