Selective Detection of Mercury Ions Based on Tin Oxide Quantum Dots: Performance and Fluorescence Enhancement Model

2021 ◽  
Author(s):  
Jianqiao Liu ◽  
Yu Bai ◽  
Jingcheng Shi ◽  
Qing Yu ◽  
Jifei Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Ions ◽  
Tin Oxide ◽  
Fluorescent Probes ◽  
Fluorescence Enhancement ◽  
Selective Detection ◽  
Mercury Ions ◽  
Metal Ions Detection

The superiority of fluorescence-based method in the metal ions detection are well developed, however, the current quantum dots (QDs) fluorescent probes for mercury ions (Hg2+) still have many limitations, such...

Arene-based fluorescent probes for the selective detection of iron

RSC Advances ◽  
2015 ◽  
Vol 5 (118) ◽  
pp. 97874-97882 ◽  
Author(s):  
Pramod Kumar ◽  
Vijay Kumar ◽  
Rajeev Gupta
Keyword(s):  
Metal Ions ◽  
Fluorescent Probes ◽  
Cell Imaging ◽  
Logic Gates ◽  
Selective Detection ◽  
Potential Applications

Amide based probes containing phenyl (L1), naphthyl (L2) and anthracenyl (L3) groups were screened towards metal ions. Probes L2 and L3 display sensing for Fe2+ and Fe3+ ions. The L3–Fe3+ system is shown to have potential applications in logic gates and cell imaging.

Fluorescence enhancement of coumarin–quinoline by transition metal ions: Detection of paramagnetic Ni2+ and Co2+

2009 ◽  
Vol 83 (1) ◽  
pp. 14-20 ◽  
Author(s):  
Weiying Lin ◽  
Lin Yuan ◽  
Zengmei Cao ◽  
Jianbo Feng ◽  
Yanming Feng
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Fluorescence Enhancement ◽  
Transition Metal Ions ◽  
Metal Ions Detection

Highly sensitive and selective detection of mercury ions based on up-conversion FRET from NaYF4:Yb3+/Er3+ nanophosphors to CdTe quantum dots

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 99099-99106 ◽  
Author(s):  
Shaobo Cui ◽  
Sai Xu ◽  
Hongwei Song ◽  
Wen Xu ◽  
Xu Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Environmental Problems ◽  
Cdte Quantum Dots ◽  
Selective Detection ◽  
Mercury Ions ◽  
Highly Sensitive

The detection of Hg2+ has attracted considerable attention because of the serious health and environmental problems caused by it.

Simple and highly selective detection of arsenite based on the assembly-induced fluorescence enhancement of DNA quantum dots

2017 ◽  
Vol 94 ◽  
pp. 701-706 ◽  
Author(s):  
Li Zhang ◽  
Xiu-Zhi Cheng ◽  
Lan Kuang ◽  
Ai-Zhen Xu ◽  
Ru-Ping Liang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescence Enhancement ◽  
Selective Detection

scholarly journals Fluorescence Characteristics of Aqueous Synthesized Tin Oxide Quantum Dots for the Detection of Heavy Metal Ions in Contaminated Water

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1294 ◽  
Author(s):  
Jianqiao Liu ◽  
Qianru Zhang ◽  
Weiting Xue ◽  
Haipeng Zhang ◽  
Yu Bai ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Quantum Dots ◽  
Metal Ions ◽  
Tin Oxide ◽  
Heavy Metal Ions ◽  
Deionized Water ◽  
Contaminated Water ◽  
Fluorescence Response ◽  
Average Grain Size ◽  
Fluorescence Characteristics

Tin oxide quantum dots were synthesized in aqueous solution via a simple hydrolysis and oxidation process. The morphology observation showed that the quantum dots had an average grain size of 2.23 nm. The rutile phase SnO2 was confirmed by the structural and compositional characterization. The fluorescence spectroscopy of quantum dots was used to detect the heavy metal ions of Cd2+, Fe3+, Ni2+ and Pb2+, which caused the quenching effect of photoluminescence. The quantum dots showed the response of 2.48 to 100 ppm Ni2+. The prepared SnO2 quantum dots exhibited prospective in the detection of heavy metal ions in contaminated water, including deionized water, deionized water with Fe3+, reclaimed water and sea water. The limit of detection was as low as 0.01 ppm for Ni2+ detection. The first principle calculation based on the density function theory demonstrated the dependence of fluorescence response on the adsorption energy of heavy metal ions as well as ion radius. The mechanism of fluorescence response was discussed based on the interaction between Sn vacancies and Ni2+ ions. A linear correlation of fluorescence emission intensity against Ni2+ concentration was obtained in the logarithmic coordinates. The density of active Sn vacancies was the crucial factor that determined fluorescence response of SnO2 QDs to heavy metal ions.

Fluorescent probes for “off–on” sensitive and selective detection of mercury ions and l-cysteine based on graphitic carbon nitride nanosheets

2015 ◽  
Vol 3 (9) ◽  
pp. 2093-2100 ◽  
Author(s):  
Hanqiang Zhang ◽  
Yihong Huang ◽  
Shirong Hu ◽  
Qitong Huang ◽  
Chan Wei ◽  
...  
Keyword(s):  
Fluorescent Probes ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Selective Detection ◽  
Schematic Diagram ◽  
Mercury Ions ◽  
Carbon Nitride Nanosheets

Schematic diagram of the fluorescent probes for the “off–on” detection of mercury ions and l-cysteine.

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