A Novel Fluorescent Test Papers Based on Carbon Dots for Selective and Sensitive Detection of Cr (VI)

被引：11

作者：

Yang, Yizhou ^{[1
]}

Chen, Xuemei ^{[1
]}

Wang, Yangyang ^{[1
]}

Wu, Miao ^{[2
]}

Ma, Yinan ^{[2
]}

Yang, Xudong ^{[2
]}

机构：

[1] Changchun Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Struct Mat, Minist Educ, Changchun, Peoples R China

[2] Changchun Univ Technol, Sch Chem Engn, Changchun, Peoples R China

来源：

FRONTIERS IN CHEMISTRY | 2020年 / 8卷

关键词：

carbon dots; Cr (VI); highly selectivity and sensitive; yellow PL emission; test papers; ONE-POT SYNTHESIS; QUANTUM DOTS; GREEN SYNTHESIS; NANODOTS; CHROMIUM; NITROGEN; FACILE; EXTRACTION; NANOSENSOR; MECHANISM;

D O I：

10.3389/fchem.2020.595628

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In recent years, carbon dots (CDs) are promising fluorescence probes for ions detection. In this paper, the CDs which are with an average diameter of 5.5 nm were synthesized through a simple one-step hydrothermal carbonization of ethylene diamine tetraacetic acid (EDTA) salt. The CDs have strong yellow photoluminescence (PL) with a maximum emission intensity at 550 nm under an excitation wavelength of 450 nm. As the electron transfer will occur between Cr (VI) and the CDs, yellow fluorescence was quenched after adding the Cr (VI) ions. The CDs probe allows the detection of Cr (VI) ions over a concentration range from 0 to 0.1 M (R-2 = 0.987) and the lower detection limit is 10(-5) M. Simultaneously, the CDs show highly selectivity and stability toward the detection of Cr (VI) ions.

引用

页数：7

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