Amino-functionalized mesoporous silica modified glassy carbon electrode for ultra-trace copper(II) determination

Dai, Xingxin; Qiu, Fagui; Zhou, Xuan; Long, Youwen; Liu, Weifeng; Tu, Yifeng

doi:10.1016/j.aca.2014.08.002

Cited by 36 publications

(13 citation statements)

References 26 publications

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“…In contrast, our CDs were one‐step synthesized without complex post processing and exhibited short response time of less than 1 min, wide detection interval of 0–80 μM and high sensitivity of 77%. Although the detection limit (i. e. 5.3 μM) largely outweighs those in the references, it is still far less than the safety limit of copper ions in drinking water at 1.3 ppm (i. e. 20 μM) stipulated by U.S. Environmental Protection Agency ,…”

Section: Resultsmentioning

confidence: 84%

“…Excessive Cu 2+ accumulation in living organism may cause headaches, stomach pain, dizziness, vomiting and so on . Therefore, the United States Environmental Protection Agency has set the safety limit of copper ions in drinking water at 1.3 ppm (i. e. 20 μM) ,. So it is still urgent to develop a simple and efficient method for the accurate Cu 2+ detection in drinking water.…”

Section: Introductionmentioning

confidence: 99%

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A Carbon‐Dot‐Based Fluorescent Probe for the Sensitive and Selective Detection of Copper(II) Ions

et al. 2019

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Fluorescent carbon dots (CDs) are widely applied for the detection of heavy metal ions due to their nontoxicity, high sensitivity and stability. In this work, CDs were synthesized by a simple and green pyrolysis method without complicated postprocessing procedures and characterized by transmission electron microscope, X-ray diffraction, fourier transform infrared spectroscopy, UV-visible spectrophotometer and fluorescence spectroscopy. The CDs exhibited a relatively narrow size distribution of 3.5-8.6 nm with an average size of 6.1 nm and their surface was decorated with abundant functional groups such as hydroxy and amino groups. They exhibited a strong fluorescent peak at 468 nm with a quantum yield of 25% under 365 nm UV irradiation. The CDs exhibited a strong fluorescence response to 70 μM Cu 2 + with the sensitivity up to 77% due to the complexation between the amino groups decorated on the CD surface and the adsorbed copper ions. They also exhibited short response times of less than 1 min, high response selectivity and good stability. Results and discussion Characterization of CDsThe morphology of the as-prepared CDs was firstly observed by a TEM, as shown in figure 1 A). Some CDs exhibit nearly spherical structure and others exhibit irregular structure. The partially enlarged image of a CD exhibits distinct lattice structure with the lattice spacing of 0.29 nm, which corresponds to the (020) crystal surface. [30] The CDs exhibit a narrow [a] Dr.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

A Carbon‐Dot‐Based Fluorescent Probe for the Sensitive and Selective Detection of Copper(II) Ions

et al. 2019

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“…Owing to high specificity and catalytic activity of HMS-Gly-Gly-His, the hybrid material has allowed the interaction of Cu 2+ to form a complex by interacting through four of its five nitrogen atoms [188]. Apart from HMS, MCM-41-modified GCE was also used by Xingxin et al The anode stripping voltammetry of this modified electrode has detected Cu 2+ with a detection limit of 0.9 ng L −1 and a linear range of 5-1000 ng L −1 [189]. Dendrimers, the fourth generation self-assembled monolayers, are the new area of research due to its unique core-shell structure with repeating units and terminal groups.…”

Section: Coppermentioning

confidence: 99%

A review on detection of heavy metal ions in water – An electrochemical approach

Gumpu

Sethuraman

Krishnan

et al. 2015

Sensors and Actuators B: Chemical

855

355

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“…Copper is a trace element required by the body for various activities, such as behaving as a catalytic cofactor for diverse metalloenzymes. The deficiency of copper in the body can lead to anemia, impaired organ function, and Menkes disease [ 56 ]. Contrarily, an increase in copper concentration beyond a limit can cause diarrhea, dyslexia, vomiting, headache, Wilson’s disease, Alzheimer’s, and Parkinson’s disease [ 57 – 59 ].…”

Section: Thiophene Based Chemosensors For Detection Of Cationsmentioning

confidence: 99%

A Comprehensive Review on Thiophene Based Chemosensors

et al. 2021

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The recognition and sensing of various analytes in aqueous and biological systems by using fluorometric or colorimetric chemosensors possessing high selectivity and sensitivity, low cost has gained enormous attention. Furthermore, thiophene derivatives possess exceptional photophysical properties compared to other heterocycles, and therefore they can be employed in chemosensors for analyte detection. In this review, we have tried to explore the design and detection mechanism of various thiophene-based probes, practical applicability, and their advanced models (design guides), which could be thoughtful for the synthesis of new thiophene-based probes. This review provides an insight into the reported chemosensors (2008-2020) for thiophene scaffold as effective emission and absorption-based chemosensors.

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Amino-functionalized mesoporous silica modified glassy carbon electrode for ultra-trace copper(II) determination

Cited by 36 publications

References 26 publications

A Carbon‐Dot‐Based Fluorescent Probe for the Sensitive and Selective Detection of Copper(II) Ions

A Carbon‐Dot‐Based Fluorescent Probe for the Sensitive and Selective Detection of Copper(II) Ions

A review on detection of heavy metal ions in water – An electrochemical approach

A Comprehensive Review on Thiophene Based Chemosensors

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