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Nitrogen and Phosphorus Co-Doped Carbon Dots for Selective Detection of Nitro Explosives.
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-04 , DOI: 10.1021/acsomega.9b03234
Dipak Gorakh Babar 1 , Shivram S Garje 1
Affiliation  

In this work, a highly selective and sensitive method has been developed for the detection of trinitrophenol (TNP), which is a dangerous explosive. For this purpose, N and P co-doped carbon dots (NP-Cdots) have been used. Synthesis of N and P co-doped carbon dots has been carried out by a simple and quick method. X-ray photoelectron spectroscopy analysis was carried out to detect the doping of N and P. These carbon dots are insoluble in water (inNP-Cdots). These carbon dots were functionalized by treating them with conc. HNO3 so that they become water-soluble (wsNP-Cdots). These dots were characterized by different analytical techniques such as IR, UV-vis, and fluorescence spectroscopy. The as-prepared wsNP-Cdots have good fluorescence properties. The average diameter of wsNP-Cdots is found to be 5.7 nm with an interlayer spacing (d-spacing) of 0.16 nm. The as-prepared wsNP-Cdots are highly sensitive and selective toward TNP, as observed using a fluorescence quenching technique. The quenching constant for TNP is found to be very high (8.06 × 104 M-1), which indicates its high quenching ability. The limit of detection is found to be 23 μM.

中文翻译:


用于选择性检测硝基爆炸物的氮和磷共掺杂碳点。



在这项工作中,开发了一种高选择性和灵敏的方法来检测三硝基苯酚(TNP),这是一种危险的爆炸物。为此,使用了 N 和 P 共掺杂碳点(NP-Cdot)。采用简单、快速的方法合成了N、P共掺杂碳点。进行X射线光电子能谱分析以检测N和P的掺杂。这些碳点不溶于水(inNP-Cdots)。这些碳点通过用浓溶液处理而被功能化。 HNO3 使它们变得可溶于水(wsNP-Cdots)。这些点通过不同的分析技术(例如红外、紫外-可见和荧光光谱)进行表征。所制备的 wsNP-Cdots 具有良好的荧光性能。 wsNP-Cdots 的平均直径为 5.7 nm,层间距(d 间距)为 0.16 nm。使用荧光猝灭技术观察到,所制备的 wsNP-Cdot 对 TNP 具有高度敏感性和选择性。 TNP 的猝灭常数非常高(8.06 × 104 M-1),这表明其具有很高的猝灭能力。发现检测限为 23 μM。
更新日期:2020-02-18
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