scholarly journals Electrochemically assisted flexible lanthanide upconversion luminescence sensing of heavy metal contamination with high sensitivity and selectivity

2019 ◽  
Vol 1 (1) ◽  
pp. 265-272 ◽  
Author(s):  
Yuen-Ting Wong ◽  
Sin-Yi Pang ◽  
Ming-Kiu Tsang ◽  
Yan Liu ◽  
Haitao Huang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Contamination ◽  
Heavy Metal Ions ◽  
Heavy Metal Contamination ◽  
Upconversion Luminescence ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Electrochemical Effect ◽  
Sensing Performance

A flexible lanthanide upconversion luminescent composite probe demonstrated high sensing performance for heavy metal ions under an electrochemical effect.

Ultra-High Sensitivity Surface Photovoltage Measurement of Heavy Metal Contamination in Silicon Wafers with Fast Metal Identification

2018 ◽  
Vol 85 (6) ◽  
pp. 77-88
Author(s):  
Marshall Wilson ◽  
Alexandre Savtchouk ◽  
John D'Amico ◽  
Bret Schrayer ◽  
Dmitriy Marinskiy ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
High Sensitivity ◽  
Silicon Wafers ◽  
Surface Photovoltage

A self-supported electrochemical sensor for simultaneous sensitive detection of trace heavy metal ions based on PtAu alloy/carbon nanofibers

2017 ◽  
Vol 9 (48) ◽  
pp. 6801-6807 ◽  
Author(s):  
SongGe Zhang ◽  
Han Zhu ◽  
PiMing Ma ◽  
Fang Duan ◽  
WeiFu Dong ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Detection Limit ◽  
Metal Ions ◽  
Electrochemical Sensor ◽  
Carbon Nanofibers ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Alloy Carbon

The key issue in efficient electrochemical detection of trace heavy metal ions (HMIs) is to design hierarchical nanostructure electrodes with high sensitivity and low detection limit.

scholarly journals Sensitive electrochemical sensor based on poly(l-glutamic acid)/graphene oxide composite material for simultaneous detection of heavy metal ions

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 17325-17334 ◽  
Author(s):  
Wei Yi ◽  
Zihua He ◽  
Junjie Fei ◽  
Xiaohua He
Keyword(s):  
Heavy Metal ◽  
Composite Material ◽  
Metal Ions ◽  
Electrochemical Sensor ◽  
Heavy Metal Ions ◽  
High Stability ◽  
Simultaneous Detection ◽  
High Sensitivity ◽  
Good Reproducibility ◽  
Oxide Composite Material

A novel electrochemical sensor with high stability and good reproducibility for the simultaneous detection of heavy metal ions was prepared by using PGA/GO to modify the GCE, showing high sensitivity of superior to most of the reported values.

Nanometer Materials Modified Electrodes for Detection of Heavy Metal Ions by Stripping Voltammetry

2014 ◽  
Vol 488-489 ◽  
pp. 129-132 ◽  
Author(s):  
Jun Wu ◽  
Li Ning Yang ◽  
Na Song ◽  
Jian Rong Chen
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Method ◽  
Heavy Metal Ions ◽  
Modified Electrodes ◽  
High Sensitivity ◽  
Stripping Voltammetry ◽  
Good Method ◽  
Nanometer Materials ◽  
Pollution Events

More and more heavy metal ions pollution events happen nowadays, so how to detect and remove heavy metal ions is a very important problem. Electrochemical method is relatively simple device, convenient automatic operation. Because of its high sensitivity and good selectivity, it becomes a good method to detect heavy metal ions. This paper summarized the detection of heavy metal ions by stripping voltammetry.

Controlling reduction degree of graphene oxide-based electrode for improving the sensing performance toward heavy metal ions

2021 ◽  
Vol 127 (3) ◽  
Author(s):  
Theeazen AL-Gahouari ◽  
Pasha Sayyad ◽  
Gajanan Bodkhe ◽  
Nikesh Ingle ◽  
Manasi Mahadik ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Reduction Degree ◽  
Sensing Performance

A Fluorene based Fluorogenic ''Turn–off'' Chemosensor for the Recognition of Cu2+ and Fe3+: Computational Modeling and Living–cell Application

2021 ◽  
Vol 17 ◽  
Author(s):  
Sukriye Nihan Karuk Elmas ◽  
Duygu Aydin ◽  
Tahir Savran ◽  
Eray Caliskan ◽  
Kenan Koran ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Density Functional ◽  
Computational Study ◽  
Binding Constants ◽  
High Sensitivity ◽  
Living Cells ◽  
Spectral Studies ◽  
One Pot

Background: The traditional methods for the detection and quantification of Cu2+ and Fe3+ heavy metal ions, are usually troublesome in terms of high–cost, non–portable, time–consuming, specialized personnel and complicated tools, so their applications in practical analyses is limited. Therefore, the development of cheap, fast and simple–use techniques/instruments with high sensitivity/selectivity for the detection of heavy metal ions are highly demanded and studied. Methods: In this study, a fluorene–based fluorescent ''turn–off'' sensor, methyl 2–(2–((((9H–fluoren–9–yl)methoxy)carbonyl)amino)–3– phenylpropanamido) acetate (probe FLPG) was synthesized via one–pot reaction and characterized by 1H–NMR, 13C–APT–NMR, HETCOR, ATR–FTIR and elemental analysis in detailed. All emission spectral studies of the probe FLPG have been performed in CH3CN/HEPES (9/1, v/v, pH=7.4) media at rt. The quantum (Φ) yield of probe FLPG decreased considerably in the presence of Cu2+ and Fe3+. The theoretical computation of probe FLPG and its complexes were also performed using density functional theory (DFT). Furthermore, bio–imaging experiments of the probe FLPG was successfully carried out for Cu2+ and Fe3+ monitoring in living–cells. Results: The probe FLPG could sense Cu2+ and Fe3+ with high selectivity and sensitivity, and quantitative correlations (R2>0.9000) between the Cu2+/Fe3+ concentrations (0.0−10.0 equiv). The limits of detection for Cu2+ and Fe3+ were found as 25.07 nM and 37.80 nM, respectively. The fluorescence quenching in the sensor is managed by ligand–to–metal charge transfer (LMCT) mechanism. Job’s plot was used to determine the binding stoichiometry (1:2) of the probe FLPG towards Cu2+ and Fe3+. The binding constants with strongly interacting Cu2+ and Fe3+ were determined as 4.56×108 M-2 and 2.02×1010 M-2, respectively, via the fluorescence titration experiments. The outcomes of computational study supported the fluorescence data. Morover, the practical application of the probe FLPG was successfully performed for living–cells. Conclusion: This simple chemosensor system offers a highly selective and sensitive sensing platform for the routine detection of Cu2+ and Fe3+, and it keeps away from the usage of costly and sophisticated analysis systems.

Mixed functionalization strategy on indium-organic framework for multiple ion detection and H2O2 turn-on sensing

2021 ◽  
Author(s):  
Xin Jiang ◽  
Ruiqing Fan ◽  
Xuesong Zhou ◽  
Ke Zhu ◽  
Tiancheng Sun ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Small Molecules ◽  
Heavy Metal Ions ◽  
High Sensitivity ◽  
Ion Detection ◽  
Turn On ◽  
High Sensitivity Detection ◽  
Sensitivity Detection ◽  
Organic Framework

A mixed-functionalization strategy on In-MOF realizes high sensitivity detection of heavy metal ions, anions and small molecules.

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