钴掺杂碳点的合成及其在六价铬快速检测方面的应用
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- 英文论文题名：Rapid detection of Cr(Ⅵ) ions based on Cobalt(Ⅱ)-doped carbon dots
- 论文作者：张洪禹 ; 王晗 ; 王际辉 ; 冯亮
- 英文论文作者：Zhang Hongyu ; Wang Han ; Wang Jihui ; Feng Liang ; School of Food Science & Technology ; Dalian Polytechnic University ; Key Lab of Separation Science for Analytical Chemistry ; Dalian Institute of Chemical Physics ; Chinese Academy of Sciences
- 年：2016
- 作者机构：大连工业大学食品学院;中国科学院大连物理化学研究所;
- 论文关键词：钴 ; 碳点 ; 快速检测 ; 六价铬 ; 水 ; 鱼
- 英文论文关键词：cobalt ; carbon dot rapid detection ; Cr(Ⅵ) ; water ; fish
- 会议召开时间：2016-11-09
- 会议录名称：中国食品科学技术学会第十三届年会论文摘要集
- 英文会议录名称：Abstracts of the 13th Annual Meeting of CIFST
- 语种：中文
- 分类号：TS207.51;O613.71
- 学会代码：ZGSP
- 会议名称：中国食品科学技术学会第十三届年会
- 会议地点：中国北京
- 主办单位：中国食品科学技术学会
- 学会名称：中国食品科学技术学会
- 页数：2
- 文件大小：108k
- 原文格式：O
- 会议级别：全国
摘要
我们制备了一种金属钴掺杂的新型荧光碳点(CCDs),并将其成功应用于Cr(Ⅵ)的检测中。通过利用透射电镜、傅里叶转换红外光谱、X射线光电子能谱等分析手段,我们对其结构进行了表征,并利用紫外可见吸收光谱和荧光光谱对其光学性质进行了分析。在三维荧光光谱的分析中,我们发现合成的荧光纳米材料中存在着颗粒内的荧光共振能量转移现象。此外,当Cr(Ⅵ)离子存在时,由于内滤效应所导致的CCDs荧光淬灭现象,可以被用来检测Cr(Ⅵ)离子。通过实验我们发现,基于CCDs的化学传感器对浓度在5μM到125μM之内的Cr(Ⅵ)离子呈现良好的线性关系(R~2=0.99),并通过计算得到对Cr(Ⅵ)离子的检出限为1.17μM(0.12mg/L)。值得一提的是,基于CCDs的化学传感器可以有效地检测自来水和鱼样品当中的Cr(Ⅵ)离子,这将有助于降低因误食受Cr(Ⅵ)污染的自来水和海产品而导致的患病风险。
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(FT-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 F(o|¨)ster 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 μM to 125 μM(R~2 =0.99),and the limit of detection was calculated as 1.17 μM(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.
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(FT-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 F(o|¨)ster 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 μM to 125 μM(R~2 =0.99),and the limit of detection was calculated as 1.17 μM(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.
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