Luminescence and electrochemical properties of rare earth (Gd, Nd) doped V<sub>2</sub>O<sub>5</sub> nanostructures synthesized by a non-aqueous sol–gel route

Arul, Venkatesan; Chandar, N. Krishna; Kandasamy, Arumugam; Chinnu, M. Karl; Marimuthu, K.; Kumar, R. Mohan; Jayavel, R.

doi:10.1039/c4ra14542a

Cited by 67 publications

(21 citation statements)

References 47 publications

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“…The prepared samples presented a typical vanadium pentoxide optical absorption spectrum ( Figure 5 a), extending almost to 600 nm, in good agreement with the literature [ 14 , 15 , 35 ].…”

Section: Resultssupporting

confidence: 88%

Surfactant Effects on the Synthesis of Redox Bifunctional V2O5 Photocatalysts

et al. 2020

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Novel V2O5 bifunctional photocatalysts were prepared following a wet chemical process with the addition of anionic or non-ionic surfactants into the precursor solution and further heating under reflux. Detailed characterization and investigation of the relevant light-matter interactions proved that surfactants addition had a strong impact on the morphology, while also affecting the crystallinity, the optoelectronic properties, and the surface chemistry of the novel photocatalysts. The most efficient photocatalyst (T80) was based on tween 80, a surface-active agent employed for the first time in the synthesis of vanadium oxide materials. T80 presented crystalline nature without structural defects, which are usually centers of e− − h+ recombination. This material also exhibited small crystal size, high porosity, and short migration paths for the charge carriers, enabling their effective separation during photocatalysis. Under UV light illumination, T80 was capable to reduce hexavalent chromium to trivalent up to 70% and showed high yields in degrading methylene blue azo-dye and tetracycline antibiotic water pollutants. This remarkably high bifunctional performance defines T80 as a promising and capable photocatalytic material for both advanced oxidation and reduction processes (AOPs-ARPs).

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“…The prepared samples presented a typical vanadium pentoxide optical absorption spectrum ( Figure 5 a), extending almost to 600 nm, in good agreement with the literature [ 14 , 15 , 35 ].…”

Section: Resultssupporting

confidence: 88%

Surfactant Effects on the Synthesis of Redox Bifunctional V2O5 Photocatalysts

et al. 2020

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“…The O1s peak indicates the presence of oxygen in V‐CP. The peaks located at 530.0 and 532.6 eV are attributed to the oxygen atom coordinated with vanadium (O—V) and carbon (O—C) in the V‐CP specimen, respectively . Further characterizations of the V‐CP sample are given in the Supporting Information (SI) (Figure S1a–c, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Dendrite Growth Suppression by Zn²⁺‐Integrated Nafion Ionomer Membranes: Beyond Porous Separators toward Aqueous Zn/V₂O₅ Batteries with Extended Cycle Life

2019

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The dendritic/irregular growth of zinc deposits in the anode surface is often considered as a major intricacy limiting the lifespan of aqueous zinc‐ion batteries. The effect of separators on the evolution of the surface morphology of the anode/cathode is never thoroughly studied. Herein, for the first time, the efficacy of the Zn2+‐integrated Nafion ionomer membrane is demonstrated as a separator to effectively suppress the growth of irregular zinc deposits in the metallic anode of an aqueous Zn/V2O5 battery. The Zn2+‐ions coordinated with the SO3− moieties in Nafion result in a high transference number of the Zn2+ cation, all the while facilitating a high ionic conductivity. The Zn2+‐integrated Nafion membrane enables the Zn/V2O5 cell to deliver a high specific capacity of 510 mAh g−1 at a current of 0.25 A g−1, which is close to the theoretical capacity of anhydrous V2O5 (589 mAh g−1). Moreover, the same cell exhibits an excellent cycling stability of 88% retention of the initial capacity even after 1800 charge–discharge cycles, superior to that of the Zn/V2O5 cells comprising conventional porous separators.

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“…The reduction in V 4+ concentration played a significant role in decreasing the electronic conductivity and Li-ion transport and thus limiting the electrochemical performance for 3%Al 3+ -V2O5. Experimentally, this was observed with low capacities in the C-rate test, large redox peak separations in the CV and in the impedance results with a decreased Rct implying increased oxygen vacancies [28,29]. aluminium nitrate and poly(vinylpyrrolidone) followed by heat treatment at 400 °C [22].…”

Section: Overall Discussionmentioning

confidence: 99%

“…Coustier et al found that doping V2O5 xerogels with Ag + increased conductivity, which was partially due to an increase in V 4+ sites and the associated increase in polaron hopping [25,26]. Higher electronic conductivities were attributed to the presence of V 4+ in a range of other doped V2O5 compounds: (i) Cr 3+ doped V2O5 at both 2 and 5 at% loadings [27], (ii) 2 at% Cu 2+ doped V2O5 [28], and (iii) 3 at% loading for Gd 3+ or Nd 3+ doped V2O5 [29]. Furthermore, whilst the exact dopant level was not specified in terms of a molar ratio, a similar observation was made for Fe 3+ doped V2O5 with three different loadings [30].…”

Section: Introductionmentioning

confidence: 97%

Enhanced electrochemical performance of electrospun V2O5 fibres doped with redox-inactive metals

Armer

Lübke

Johnson

et al. 2018

J Solid State Electrochem

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Luminescence and electrochemical properties of rare earth (Gd, Nd) doped V₂O₅ nanostructures synthesized by a non-aqueous sol–gel route

Abstract: Vanadium pentoxide nanostructures have been obtained from an alkoxide sol–gel, prepared by a simple and inexpensive facile non-aqueous method.

Cited by 67 publications

References 47 publications

Surfactant Effects on the Synthesis of Redox Bifunctional V2O5 Photocatalysts

Surfactant Effects on the Synthesis of Redox Bifunctional V2O5 Photocatalysts

Dendrite Growth Suppression by Zn²⁺‐Integrated Nafion Ionomer Membranes: Beyond Porous Separators toward Aqueous Zn/V₂O₅ Batteries with Extended Cycle Life

Enhanced electrochemical performance of electrospun V2O5 fibres doped with redox-inactive metals

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Luminescence and electrochemical properties of rare earth (Gd, Nd) doped V2O5 nanostructures synthesized by a non-aqueous sol–gel route

Abstract: Vanadium pentoxide nanostructures have been obtained from an alkoxide sol–gel, prepared by a simple and inexpensive facile non-aqueous method.

Cited by 67 publications

References 47 publications

Surfactant Effects on the Synthesis of Redox Bifunctional V2O5 Photocatalysts

Surfactant Effects on the Synthesis of Redox Bifunctional V2O5 Photocatalysts

Dendrite Growth Suppression by Zn2+‐Integrated Nafion Ionomer Membranes: Beyond Porous Separators toward Aqueous Zn/V2O5 Batteries with Extended Cycle Life

Enhanced electrochemical performance of electrospun V2O5 fibres doped with redox-inactive metals

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Luminescence and electrochemical properties of rare earth (Gd, Nd) doped V₂O₅ nanostructures synthesized by a non-aqueous sol–gel route

Dendrite Growth Suppression by Zn²⁺‐Integrated Nafion Ionomer Membranes: Beyond Porous Separators toward Aqueous Zn/V₂O₅ Batteries with Extended Cycle Life