Fluorescence Determination of Ni 2+ Ions Based on a Novel Nano-Platform Derived from Silicon Quantum Dots
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ORIGINAL PAPER
Fluorescence Determination of Ni2+ Ions Based on a Novel Nano-Platform Derived from Silicon Quantum Dots Qin Wen 1 & Chunxia Jiang 1 & Wanqiang Liu 2 & Zhi Zeng 1 & Jinwei Gao 3 & Yuhui Zheng 1 Received: 10 August 2020 / Accepted: 27 October 2020 # Springer Nature B.V. 2020
Abstract Quantum dots generate unique luminescent and chemical properties due to the ultra-small particle sizes. In this contribution, a novel silicon nanoparticles (Si-NPs)-based platform has been established via (3-aminopropyl) trimethoxysilane (APS) and ascorbic acid (AA) as raw materials within only 30 min. A switched off effect has been achieved for the determination of Ni2+ ions and the strategy has been simply realized by recording the luminescence changes in the green band of Si-NPs. This developed approach possesses a variety of merits such as label free, low cost, easy post-treatment and convenient operations. The linear equation range is yielded between 0 and 20 μM with the detection limit of 1.73 μM. The nano-sensor provides a versatile route for the monitoring of mercury ions in practical environments. Keywords Silicon quantum dots . Probe . Luminescence
1 Introduction So far as the molecular systems employed in sensing field are concerned, several features such as poor long-term stability or leaching problem will limit their usage in practical applications [1]. The hybrid chemistry is generally a new way to prepare the composites through hydrolysis and polycondensation of alkoxy precursors. In this case, a few organo-silane coupling agents including methoxy- ethoxyor amino functional groups were explored and the fabrication Supplementary Information The online version contains supplementary material available at https://doi.org/10.1007/s12633-02000814-6. * Zhi Zeng [email protected] * Yuhui Zheng [email protected] 1
Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, People’s Republic of China
2
School of Chemistry & Chemical Engineering, Hunan University of Science and Technology, Xiangtan, People’s Republic of China
3
Guangdong Provincial Engineering Technology Research Center For Transparent Conductive Materials, South China Normal University, Guangzhou 510006, China
of inorganic-organic materials via the above-mentioned bridging building blocks was realized [2, 3]. Therefore, the resultant sample possessed both flexibility of organic moiety and chemical resistance of inorganic network. Numerous reports involve the employment of functionalized pre-organized cross-linked silica structure in sensing protocols [4–6]. As for the dimension of sensing systems, extensive studies supported that quantum confinement effect will be a primary factor responsible for the optical-active behavior. It is effective to achieve interesting photophysical properties by controlling the particle sizes [7–12]. On this subject, one of the new directions for investigating the quantum dots is to assemble silicon nan
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