Effect of Sn doping and annealing on the morphology, structural, optical, and electrical properties of 3D (micro/nano) V2O5 sphere for high sensitivity pH-EGFET sensor

Slewa, Lary H.; Abbas, Talib R.; Ahmed, Naser M.

doi:10.1016/j.snb.2019.127515

Cited by 20 publications

(16 citation statements)

References 21 publications

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“…194 Doping with metal, non-metal, and rare-earth-doped V 2 O 5 , such as Gd, Nd, Ag, Nb, Ce, Sm, Dy, Mg, Li, W, Sn, Yb, La, and F, affects the E opt of V 2 O 5 with no clear tendency. 108,135,[171][172][173][195][196][197][198][199][200] The E opt increased with increasing Ce-, Sm-, Dy-, and Mgdoped V 2 O 5 , whereas Sn-, Nb-, Gd-, Ag-, and Li-doped V 2 O 5 , lead to a decrease in E opt . For Nd, F, La, Yb, and W doping, E opt changes depending on the dopant concentration.…”

Section: Influence Of Dopantsmentioning

confidence: 99%

Recent advances in vanadium pentoxide (V₂O₅) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

Pham

Dong

et al. 2022

J. Mater. Chem. C

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Section: Influence Of Dopantsmentioning

confidence: 99%

Recent advances in vanadium pentoxide (V₂O₅) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

Pham

Dong

et al. 2022

J. Mater. Chem. C

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“…One approach to address these issues involves the introduction of O-vacancies , or cation impurities into V 2 O 5. − For instance, Sn doping has been found to significantly improve cyclic stability, electrochemical performance, and rate capability of V 2 O 5 cathodes. − In particular, Sn-doped samples exhibit superior cyclic stability, as evidenced by higher reversible capacity after multiple cycles compared to the undoped one. , Electrochemical measurement further demonstrates the increase in Li diffusion coefficient and decrease in charge transfer resistance after Sn doping. − Moreover, the Hall effect measurement has revealed that Sn doping elevates carrier concentration and mobility by over tenfold at room temperature …”

Section: Introductionmentioning

confidence: 99%

On the Origin of Ion Intercalation and Conductivity Enhancement in Sn-Doped V₂O₅ Cathodes of Li-Ion Batteries: A Computational Study

et al. 2023

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Vanadium pentoxide (V 2 O 5 ) is one of the most promising cathode materials used in metal-ion batteries due to its high theoretical capacity. But it still suffers from low electronic conductivity leading to sluggish ion transport kinetics. Although the introduction of Sn impurities in V 2 O 5 has been proposed to partially alleviate these drawbacks, the origin of the improvement is still unclear. In this work, we employed the density functional theory (DFT+U) method to study the role of Sn doping on the enhanced electronic conductivity and Li intercalation. Using a thermodynamic model based on defect formation energies and charge neutrality constraint, we find that Sn substitution at a vanadyl group (Sn VO ) is likely to occur upon Sn doping. The Sn VO defect generates one electron polaron at the nearby V center, which could escape the defect site upon thermal excitation with a barrier of 0.55 eV. Such a relatively mobile polaron could act as a charge carrier and enhance the electronic conductivity of the cathode. Upon Li intercalation, the Sn VO defect with a repulsive nature toward Li serves as a nucleation center, where Li could accumulate nearby the defect site. This could enhance the formation of a lithiated phase during the early discharge process. However, loading too much Sn could lead to inferior cathode performance since it impedes Li diffusion. Our findings provide insights into the role of Sn doping in the design of high-performance V 2 O 5 -based cathode materials for Li-ion batteries.

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“…pH and glucose sensors have practical applications in various areas such as research, medicine, wastewater treatment, and agriculture [1][2][3][4][5][6]. Most commercially available pH sensors are expensive and bulky; therefore, they are not suitable for applications requiring miniature pH sensors [7,8].…”

Section: Introductionmentioning

confidence: 99%

A dual-functional flexible sensor based on defects-free Co-doped ZnO nanorods decorated with CoO clusters towards pH and glucose monitoring of fruit juices and human fluids

Hilal

Yang

2022

Nano Convergence

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Herein, ZnO nanorods were doped with Co and decorated with CoO clusters through an in situ technique to create a CoO/Co-doped ZnO (CO/CZO) heterostructure at low temperatures (150 °C) on a flexible PET substrate. In the CO/CZO heterostructure, the Co dopant has a low energy barrier to substitute Zn atoms and adsorb over oxygen atoms and their vacancies. Therefore, it decreased the charge density (ND = 2.64 × 1019 cm−3) on non-active sites of ZnO and lowered the charge transfer resistance (317 Ω) at Co-doped-ZnO/electrolyte interface by suppressing the native defects and reducing the Schottky barrier height (− 0.35 eV), respectively. Furthermore, CoO clusters induced a p-n heterostructure with Co-doped ZnO, prevented corrosion, increased the active sites for analyte absorption, and increased the ultimate tensile strength (4.85 N m−2). These characteristics enabled the CO/CZO heterostructure to work as a highly sensitive, chemically stable, and flexible pH and glucose oxidation electrode. Therefore, CO/CZO heterostructure was explored for pH monitoring in human fluids and fruit juices, demonstrating a near-Nernst-limit pH sensitivity (52 mV/pH) and fast response time (19 s) in each human fluid and fruit juice. Also, it demonstrated high sensitivity (4656 µM mM−1 cm−2), low limit of detection (0.15 µM), a broad linear range (0.04 mM to 8.85 mM) and good anti-interference capacity towards glucose-sensing. Moreover, it demonstrated excellent flexibility performances, retained 53% and 69% sensitivity of the initial value for pH and glucose sensors, respectively, after 500 bending, stretching, and warping cycles. Graphical Abstract

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Effect of Sn doping and annealing on the morphology, structural, optical, and electrical properties of 3D (micro/nano) V2O5 sphere for high sensitivity pH-EGFET sensor

Cited by 20 publications

References 21 publications

Recent advances in vanadium pentoxide (V₂O₅) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

Recent advances in vanadium pentoxide (V₂O₅) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

On the Origin of Ion Intercalation and Conductivity Enhancement in Sn-Doped V₂O₅ Cathodes of Li-Ion Batteries: A Computational Study

A dual-functional flexible sensor based on defects-free Co-doped ZnO nanorods decorated with CoO clusters towards pH and glucose monitoring of fruit juices and human fluids

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Effect of Sn doping and annealing on the morphology, structural, optical, and electrical properties of 3D (micro/nano) V2O5 sphere for high sensitivity pH-EGFET sensor

Cited by 20 publications

References 21 publications

Recent advances in vanadium pentoxide (V2O5) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

Recent advances in vanadium pentoxide (V2O5) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

On the Origin of Ion Intercalation and Conductivity Enhancement in Sn-Doped V2O5 Cathodes of Li-Ion Batteries: A Computational Study

A dual-functional flexible sensor based on defects-free Co-doped ZnO nanorods decorated with CoO clusters towards pH and glucose monitoring of fruit juices and human fluids

Contact Info

Product

Resources

About

Recent advances in vanadium pentoxide (V₂O₅) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

Recent advances in vanadium pentoxide (V₂O₅) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

On the Origin of Ion Intercalation and Conductivity Enhancement in Sn-Doped V₂O₅ Cathodes of Li-Ion Batteries: A Computational Study