Developing potentiometric sensors for scandium

Dehabadi, Monireh; Legin, E.K.; Yaghmaei, Soheila; Нечаев, А. В.; Бабаин, В. А.; Kirsanov, Dmitry

doi:10.1016/j.snb.2021.130699

Cited by 12 publications

(5 citation statements)

References 37 publications

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“…Potentiometry is one of the most commonly developed electrochemical methods, and is based on the measurement of a potential difference when the target ionic species in an aqueous phase complex with target selective ionophores present in an organic membrane [ 26 ]. Potentiometric sensing can be an attractive alternative to the existing electrochemical analytical tools due to its simplicity and fast responses [ 27 ]. Figure 8 shows the selective response of the bare SPCE and L-M/SPCE sensors to zinc ion addition.…”

Section: Resultsmentioning

confidence: 99%

On the Electroanalytical Detection of Zn Ions by a Novel Schiff Base Ligand-SPCE Sensor

Bressi

Akbari

Montazerozohori

et al. 2022

Sensors

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A novel bidentate Schiff base (L) is here proposed for the detection of Zn ions in water. The structure of the synthesized Schiff base L was characterized by FT-IR, 1H NMR and 13C NMR. Optical characteristics were addressed by UV-Visible spectroscopy and Photoluminescence (PL) measurements. PL demonstrated that L displays a “turn-off” type fluorescence quenching in the presence of Zn2+ ion in aqueous solution, indicating its ability to preferentially coordinate this ion. Based on these findings, an L-M (where M is a suitable membrane) modified screen-printed carbon electrode (SPCE) was developed to evaluate the electrochemical behavior of the Schiff base (L) with the final objective of undertaking the electroanalytical determination of Zn ions in water. Using various electrochemical techniques, the modified L-M/SPCE sensor demonstrates high sensitivity and selectivity to Zn ions over some common interferents ions, such as Ca2+, Mg2+, K+, Ni++ and Cd++. The potentiometric response of the L-M/SPCE sensor to Zn ions was found to be linear over a relatively wide concentration range from 1 μM to 100 mM.

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Section: Resultsmentioning

confidence: 99%

On the Electroanalytical Detection of Zn Ions by a Novel Schiff Base Ligand-SPCE Sensor

Bressi

Akbari

Montazerozohori

et al. 2022

Sensors

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“…At the same time, NH3 and H2O are formed. The chemical equation may be expressed by Equation (1). The thermodynamic data of the fluorination reaction are calculated by HSC Chemistry 6.0 software, as shown in Table 2 and Figure 4.…”

Section: Thermodynamic Analysismentioning

confidence: 99%

“…With the extensive applications of the Sc element in superconducting materials [1], as well as in automotive [2], aerospace, military [3], fluorescence [4] and solid oxide fuel batteries [5][6][7][8], the requirements for the quality of scandium or its alloys are also increasing. However, obtaining these metals is very difficult due to the high chemical activity of scandium.…”

Section: Introductionmentioning

confidence: 99%

Study on the Fluorination Process of Sc2O3 by NH4HF2

Li,

Zhan,

et al. 2023

Materials

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Research on rare-earth fluorides is of urgent and critical importance for the preparation and emerging applications of high-purity alloys. The fluorination of Sc2O3 by NH4HF2 to fabricate ScF3 is investigated. The effects of the fluorination temperature, time and mass ratio of reactant on the fluorination rate and fluoride are discussed in this work. The fluorination reaction was first confirmed using thermodynamic calculation. The thermal and mass stability of the fluorination process were analyzed by thermogravimetric and differential scanning calorimetric (TG-DSC). The as-obtained products at different fluorination temperatures were characterized by Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). The results indicated that the fluorination began at room temperature (RT) with the formation of (NH4)3ScF6. With the increase of temperature, the reaction proceeded sequentially through the formation of NH4ScF4, (NH4)2Sc3F11, and finally ScF3. The fluorination rate increased with the increase of fluorination temperature and holding time. ScF3 with a purity of 99.997 wt.% could be obtained by fluorination at 400 °C for 2 h.

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“…6 However, despite the use of sophisticated equipment and professional staff, the field detection of Sc 3+ remains a universal challenge. In recent years, simple and rapid testing strategies such as fluorescence, 18 colorimetry, 19 and potentiometry 20 have gained favor but still suffered from poor selectivity and long response time. Fluorescence technology is known for its high sensitivity and low background, and the fluorescence approach offers many possibilities for developing portable sensors combined with 3D printing technology.…”

mentioning

confidence: 99%

“…However, despite the use of sophisticated equipment and professional staff, the field detection of Sc 3+ remains a universal challenge. In recent years, simple and rapid testing strategies such as fluorescence, colorimetry, and potentiometry have gained favor but still suffered from poor selectivity and long response time. Fluorescence technology is known for its high sensitivity and low background, and the fluorescence approach offers many possibilities for developing portable sensors combined with 3D printing technology. − Additionally, portable smartphone-based fluorescence sensing platforms offer multiple advantages for real-time monitoring of environmental samples and can be combined with machine learning to reduce labor costs. − Calcein (CL), a remarkable coordination reagent and indicator that belongs to the family of amino poly(carboxylic acid) ligands of fluorescein, was widely designed as sensing protocols for anions, cations, , molecules, , and biomarkers .…”

mentioning

confidence: 99%

Highly Selective and Portable Fluorescence Turn-On Detection of Sc³⁺ in Ore and Water Based on Strong Lewis Acid–Base Coordination

Chen,

Zhang,

et al. 2024

Anal. Chem.

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Detecting scandium (Sc) with high selectivity and sensitivity is a challenging task due to its chemical similarity to other rare earth ions. Our findings show that the fluorescence of the complex fluorescent indicator calcein (CL) is quenched under acidic conditions (pH = 2), and Sc 3+ strongly inhibits this process. The results demonstrate that CL forms multimers and precipitates out of the solution under acidic conditions, while Sc 3+ causes a significant decrease in the scattering intensity of the solution. Additional experiments revealed that the strong Lewis acid nature of Sc 3+ complexes with the carboxyl groups of CL leads to increased dispersion of CL even under acidic conditions, thus enhancing its absorption and fluorescence. The complexation ratio of Sc 3+ and CL was investigated through spectral titrations and theoretical calculations. The interaction between Sc 3+ and CL is the strongest among rare earth and common metal ions due to the smallest ionic radius, resulting in high selectivity. The fluorescence turn-on strategy had a linear range of 0.04 to 2.25 μM under optimal conditions, with a detection limit of 20 nM for Sc 3+ . The combination of 3D printing and a smartphone program allows for portable on-site analysis of Sc 3+ . Mineral and water samples were used to demonstrate the potential of this strategy for the rapid, selective, and sensitive analysis of low levels of Sc 3+ .

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Developing potentiometric sensors for scandium

Cited by 12 publications

References 37 publications

On the Electroanalytical Detection of Zn Ions by a Novel Schiff Base Ligand-SPCE Sensor

On the Electroanalytical Detection of Zn Ions by a Novel Schiff Base Ligand-SPCE Sensor

Study on the Fluorination Process of Sc2O3 by NH4HF2

Highly Selective and Portable Fluorescence Turn-On Detection of Sc³⁺ in Ore and Water Based on Strong Lewis Acid–Base Coordination

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Developing potentiometric sensors for scandium

Cited by 12 publications

References 37 publications

On the Electroanalytical Detection of Zn Ions by a Novel Schiff Base Ligand-SPCE Sensor

On the Electroanalytical Detection of Zn Ions by a Novel Schiff Base Ligand-SPCE Sensor

Study on the Fluorination Process of Sc2O3 by NH4HF2

Highly Selective and Portable Fluorescence Turn-On Detection of Sc3+ in Ore and Water Based on Strong Lewis Acid–Base Coordination

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Product

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Highly Selective and Portable Fluorescence Turn-On Detection of Sc³⁺ in Ore and Water Based on Strong Lewis Acid–Base Coordination