Facile synthesis of N,P-doped carbon dots from maize starch via a solvothermal approach for the highly sensitive detection of Fe3+ |
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| Authors: | Guohua Dong Kun Lang He Ouyang Wenzhi Zhang Liming Bai Shijie Chen Zhuanfang Zhang Yueyue Gao Zhonghua Mu Xiaodan Zhao |
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| Institution: | College of Chemistry and Chemical Engineering, Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals, Qiqihar University, Qiqihar 160006 P. R. China.; Key Laboratory of Photovoltaic Materials, Henan University, Qiqihar 151001 P. R. China ; College of Environmental and Chemical Engineering, Hefei University of Technology, Hefei 230009 P. R. China |
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| Abstract: | Nitrogen/phosphorus-doped carbon dots (N, P-CDs) with a quantum yield as high as 76.5% were synthesized by carbonizing maize starch via a facile ethanol solvothermal approach. Transmission electron microscopy (TEM) measurement shows that the as-prepared N, P-CDs displayed a quasi-spherical shape with a mean size of ca. 2.5 nm. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy disclosed the presence of –OH, –NH2, –COOH, and –CO functional groups over the surface of N, P-CDs. On the basis of excellent fluorescent properties with strong blue fluorescence emission at 445 nm upon excitation at 340 nm, these N, P-CDs were adopted as a fluorescent probe towards the effective detection of Fe3+ ions in water. The limit of detection (LOD) was as low as 0.1 μmol L−1 and showed a better linear relationship in the range of 0.1 ∼ 50 μmol L−1. In conclusion, these synthesized N, P-CDs can be efficiently used as a promising candidate for the detection of Fe3+ ions in some practical samples.Nitrogen/phosphorus-doped carbon dots (N, P-CDs) with a quantum yield as high as 76.5% were synthesized by carbonizing maize starch via a facile ethanol solvothermal approach and utilized for the detection of Fe3+. |
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