کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397901 | 1505874 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Green synthesis of sulfur- and nitrogen-co-doped carbon dots using ionic liquid as a precursor and their application in Hg2+ detection
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A facile and environment-friendly method was developed to synthesize sulfur- and nitrogen-co-doped carbon dots (S/N-CDs) via one step hydrothermal treatment of 1-butyl-3-methylimidazolium 2-amino-3-mercaptopropionic acid salt ionic liquid and polyethylene glycol. It was found that the prepared S/N-CDs were nearly spherical nanoparticles. And then the size of the as-prepared S/N-CDs became smaller with the extension of reaction time, the amorphous carbon was gradually transformed into a crystal structure of carbon dots and a higher reaction temperature favors the formation of carbon dots with higher quantum yields. It was also found that sulfur atoms in the S/N-CDs change the surface structures of CDs to some extent. Higher quantum yield of the S/N-CDs should attribute to the synergistic effect of co-doped nitrogen and sulfur atoms. The S/N-CDs display stable and strong florescence, high water solubility, excitation-dependent emission behavior, particularly the up-conversion photoluminescence performance. Furthermore, the as-prepared S/N-CDs were used as a sensitive probe for Hg2+ detection in aqueous solutions, with high selectivity and sensitivity. Particularly, the detection limit could reach as low as 0.6Â nM (S/N=3).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 187, July 2017, Pages 227-234
Journal: Journal of Luminescence - Volume 187, July 2017, Pages 227-234
نویسندگان
Kelei Zhuo, Dong Sun, Panpan Xu, Chunfeng Wang, Yingying Cao, Yujuan Chen, Jianming Liu,