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题名: Rapid detection of Cr(VI) ions based on cobalt(II)-doped carbon dots
作者: Zhang, Hong-Yu1;  Wang, Yu2;  Xiao, Shan1;  Wang, Han1;  Wang, Ji-Hui1;  Feng, Liang2
关键词: Cobalt ;  Carbon dot ;  Rapid detection ;  Cr(VI) ;  Water ;  Fish
刊名: BIOSENSORS & BIOELECTRONICS
发表日期: 2017-01-15
DOI: 10.1016/j.bios.2016.08.010
卷: 87, 页:46-52
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine ;  Physical Sciences
类目[WOS]: Biophysics ;  Biotechnology & Applied Microbiology ;  Chemistry, Analytical ;  Electrochemistry ;  Nanoscience & Nanotechnology
研究领域[WOS]: Biophysics ;  Biotechnology & Applied Microbiology ;  Chemistry ;  Electrochemistry ;  Science & Technology - Other Topics
英文摘要: A new type of cobalt(II)-doped carbon dots (CCDs) have been fabricated and used successfully for sensing Cr(VI) ions on the basis of photoluminescence quenching. The structural characterization of as-obtained CCDs was thoroughly performed by transmission electron microscopy (TEM), Fourier transform infrared (Fr-IR) and X-ray photoelectron (XPS) spectroscopy. The optical properties were also determined by absorption and fluorescence spectra. By recording 3D fluorescence spectrum, a unique intra-particle Forster resonance energy transfer (FRET) system was investigated. In addition, fluorescence quenching of CCDs was observed in the presence of Cr(VI) ions due to inner filter effect. A good linear relationship between the concentration of Cr(VI) ions and fluorescent intensity was obtained in the range from 5 mu M to 125 pM (R-2=0.99), and the limit of detection was calculated as 1.17 mu M(0.12 ppm for Cr(VI)). Importantly, this method was capable of rapidly detecting Cr(VI) ions in tap water and fish samples, which may be helpful in risk reduction of intake Cr(VI) contamination from water and seafood. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]: ATOMIC-ABSORPTION-SPECTROMETRY ;  QUANTUM DOTS ;  FLUORESCENT-PROBE ;  GREEN SYNTHESIS ;  SENSITIVE DETECTION ;  FACILE SYNTHESIS ;  NITROGEN ;  CHROMIUM(VI) ;  SENSOR ;  WATER
语种: 英语
WOS记录号: WOS:000390499600008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150511
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Polytech Univ, Sch Food Sci & Technol, Dalian 116034, Liaoning, Peoples R China
2.Chinese Acad Sci, Key Lab Separat Sci Analyt Chem, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Zhang, Hong-Yu,Wang, Yu,Xiao, Shan,et al. Rapid detection of Cr(VI) ions based on cobalt(II)-doped carbon dots[J]. BIOSENSORS & BIOELECTRONICS,2017,87:46-52.
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