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Lead-Free Antimony-Based Perovskite Nanocrystals as a Fluorescent Nanoprobe for the Turn-On Detection of Trace Water in Organic Solvents
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-03-19 , DOI: 10.1021/acsanm.4c00542
Jing Wang 1 , Yujie Huang 1 , Ziqi Gao 1 , Jianxiu Du 1
Affiliation  

This work reported the synthesis of lead-free antimony-based perovskite nanocrystals (Cs3Sb2Br9 PNCs) through a ligand-assisted reprecipitation method. Cs3Sb2Br9 PNCs exhibit strong blue emission with one maximum emission peak at 423 nm when excited at a wavelength of 375 nm. Notably, it was found that the presence of trace water significantly enhances the fluorescence of Cs3Sb2Br9 PNCs. As the result, a fluorescence nanosensor was developed for the turn-on detection of trace water. The increase in the fluorescence intensity of Cs3Sb2Br9 PNCs at 423 nm displays a good linear relationship with the water content in the range of 0.1–4.0% (v/v) with a detection limit of 0.033% (v/v). Measurement repeatability is confirmed through parallel measurements (n = 11) of a 2.0% (v/v) water content, resulting in a relative standard deviation of 2.1%. The efficacy of this nanosensor was successfully demonstrated for determining the water content in various commercial organic solvents, yielding satisfactory results.

中文翻译:

无铅锑基钙钛矿纳米晶体作为荧光纳米探针用于有机溶剂中痕量水的启动检测

这项工作报道了通过配体辅助再沉淀方法合成无铅锑基钙钛矿纳米晶体(Cs 3 Sb 2 Br 9 PNC)。当在 375 nm 波长下激发时,Cs 3 Sb 2 Br 9 PNC 表现出强蓝色发射,在 423 nm 处有一个最大发射峰。值得注意的是,发现痕量水的存在显着增强了Cs 3 Sb 2 Br 9 PNC 的荧光。因此,开发了一种用于痕量水开启检测的荧光纳米传感器。 Cs 3 Sb 2 Br 9 PNCs 在 423 nm 处的荧光强度增加与含水量在 0.1%~4.0% (v/v) 范围内呈现良好的线性关系,检测限为 0.033% (v/v)。 )。测量重复性通过 2.0% (v/v) 水含量的平行测量 ( n = 11)得到确认,相对标准偏差为 2.1%。该纳米传感器的功效已成功证明用于测定各种商业有机溶剂中的水含量,并取得了令人满意的结果。
更新日期:2024-03-19
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