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Preparation of Switchable ZnO-NH2 QDs Fluorescent Probe and Its Application in Specific Detection of Cu2+
增强出版- Chinese Journal of Luminescence Vol. 43, Issue 4, Pages: 620-632(2022)
- 作者机构：
1.广西科技大学 生物与化学工程学院，广西糖资源绿色加工重点实验室，广西 柳州 545006
2.蔗糖产业省部共建协同创新中心，广西 南宁 530004
- 作者简介：
- 基金信息：Fund Project ： Guangxi Key Laboratory of Green Processing of Sugar Resources Open Project(GXTZY202006)
DOI：10.37188/CJL.20210408
CLC： O482.31;TQ132.41Published：01 April 2022，
Received：25 December 2021，
Revised：10 January 2022，
扫 描 看 全 文
Bao CUI, Qiu-mei HUANG, Xi-lin RONG, et al. Preparation of Switchable ZnO-NH2 QDs Fluorescent Probe and Its Application in Specific Detection of Cu2+. [J]. Chinese Journal of Luminescence 43(4):620-632(2022)
Bao CUI, Qiu-mei HUANG, Xi-lin RONG, et al. Preparation of Switchable ZnO-NH2 QDs Fluorescent Probe and Its Application in Specific Detection of Cu2+. [J]. Chinese Journal of Luminescence 43(4):620-632(2022) DOI： 10.37188/CJL.20210408.
摘要
采用溶胶凝胶法制备出一种荧光性能稳定的氧化锌量子点(ZnO-NH
2
QDs)，并对其进行紫外-可见光谱(UV-Vis)、傅里叶变换红外光谱(FTIR)、X 射线衍射(XRD)、透射电子显微镜(TEM)、X 射线光电子能谱(XPS)、荧光(PL)表征。基于Cu
2+
对ZnO-NH
2
QDs动态荧光猝灭且Cu
2+
可与邻苯二胺(OPD，为非荧光物质)反应生成具有黄色荧光的2
3-二氨基吩嗪(DAP)的机理，开发了一种具有特异性识别Cu
2+
的ZnO-NH
2
QDs荧光探针以及ZnO-NH
2
QDs+Cu
2+
+OPD荧光传感系统。该探针在40~9 000 nmol/L的线性范围内检测Cu
2+
，检测限(LOD)为3.93 nmol/L。在自来水中的加标回收率范围为98%~100.58%，在柳江水中Cu
2+
的加标回收率范围为97.43%~101.47%。实验结果表明该探针对Cu
2+
有较好的选择性和准确度，能为金属离子Cu
2+
的荧光快速检测提供一种新思路。
Abstract
In this paper
a kind of fluorescence stable ZnO-NH
2
QDs was prepared by sol-gel method. ZnO-NH
2
QDs were characterized by UV-visible spectroscopy(UV-Vis)
Fourier transform infrared spectroscopy(FTIR)
X-ray diffraction(XRD)
transmission electron microscopy(TEM)
X-ray photoelectron spectroscopy(XPS)
and fluorescence(PL). Based on the dynamic fluorescence quenched of ZnO-NH
2
QDs by Cu
2+
and the mechanism that Cu
2+
can react with o-phenylenediamine(OPD
a non-fluorescent substance) to form 2
3-diaminophenothiazine (DAP) with yellow fluorescence
a fluorescent probe for ZnO-NH
2
QDs with specific recognition of Cu
2+
and a ZnO-NH
2
QDs+Cu
2+
+OPD fluorescence sensing system were developed. The probe detected Cu
2+
over a linear range of 40-9 000 nmol/L with detection limit of 3.93 nmol/L. The recovery rate of standard addition ranged from 98% to 100.58% in tap water
and that was 97.43% to 101.47% in Liujiang water. The experimental results show that the probe has good selectivity and accuracy for Cu
2+
which can provide a new idea for the fluorescence rapid detection of Cu
2+
metal ions.
关键词
氧化锌量子点开关式荧光探针Cu2+
Keywords
ZnO quantum dotsswitchable fluorescence probeCu2+
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