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四川农业大学 食品学院,四川 雅安 625014
[ "钱玟(1997-),男,四川巴中人,硕士研究生,2019年于四川农业大学获得学士学位,主要从事食品检测荧光探针技术的研究。E-mail: 1980385367@qq.com" ]
[ "何利(1984-),女,重庆人,博士,副教授,硕士研究生导师,2011年于四川大学获得博士学位,主要从事食品资源综合利用、食品安全检测技术的研究。E-mail: helifood@163.com" ]
收稿日期:2021-08-04,
修回日期:2021-08-11,
纸质出版日期:2021-11-01
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钱玟, 何利, 潘无双, 等. 猪骨氮掺杂碳量子点制备及其用于检测Co2+[J]. 发光学报, 2021,42(11):1818-1827.
Wen QIAN, Li HE, Wu-shuang PAN, et al. Preparation of Pig Bone Nitrogen-doped Carbon Quantum Dots and Application in Detection of Co2+[J]. Chinese journal of luminescence, 2021, 42(11): 1818-1827.
钱玟, 何利, 潘无双, 等. 猪骨氮掺杂碳量子点制备及其用于检测Co2+[J]. 发光学报, 2021,42(11):1818-1827. DOI: 10.37188/CJL.20210260.
Wen QIAN, Li HE, Wu-shuang PAN, et al. Preparation of Pig Bone Nitrogen-doped Carbon Quantum Dots and Application in Detection of Co2+[J]. Chinese journal of luminescence, 2021, 42(11): 1818-1827. DOI: 10.37188/CJL.20210260.
以猪骨和乙二胺为碳源和氮源,通过一步水热法合成了氮掺杂碳量子点(N-CQDs),并优化其制备条件。通过透射电子显微镜(TEM)、傅里叶变换红外光谱(FT-IR)、X射线衍射图(XRD)、紫外-可见吸收光谱(UV-Vis)和X射线光电子能谱(XPS)技术,研究了N-CQDs的结构和光学性质及元素组成。所制备的N-CQDs具有较高的量子产率(26.4%),平均粒径为2.34 nm,在365 nm紫外光照射下呈现出明亮的蓝色荧光。研究发现Co
2+
对N-CQDs有良好的猝灭作用,从而建立了一种快速检测Co
2+
的新方法。N-CQDs荧光猝灭强度与Co
2+
浓度在0~15 μg/mL和30~80 μg/mL呈良好的线性关系,检出限为20 μg/L,加标回收率为97.26%~109.14%
RSD
<
3.24%,能够应用于实际水样中Co
2+
含量的测定。
Nitrogen-doped carbon quantum dots(N-CQDs) were successfully synthesized using pig bone and ethylenediamine as carbon and nitrogen sources by one-step hydrothermal method. Structure
optical properties and element composition of N-CQDs have been studied by transmission electron microscope(TEM)
Fourier transform infrared spectroscopy(FT-IR)
X-ray diffractometer patterns(XRD)
UV-Vis absorption spectroscopy(UV-Vis) and X-ray photoelectron spectroscopy(XPS) technologies. The synthesized N-CQDs have a high quantum yield(26.4%)
an average particle size of 2.34 nm
showing bright blue fluorescence under a 365 nm UV lamp. The study found that Co
2+
had a good quenching effect on N-CQDs
so as to establish a new method for rapid detection of Co
2+
. The fluorescence quenching intensity of N-CQDs has a good linear relationship with the concentration of Co
2+
at 0-15 μg/mL and 30-80 μg/mL
the detection limit is 20 μg/L
and the recovery rate of standard addition is 97.26%-109.14%
RSD
<
3.24%
which can be applied to the determination of Co
2+
content in actual water samples.
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