AgVO3 nanorods: Synthesis, characterization and visible light photocatalytic activity

Sivakumar, V.; Suresh, R.; Giribabu, K.; Narayanan, Vijaykrishnan

doi:10.1016/j.solidstatesciences.2014.10.016

Cited by 60 publications

(29 citation statements)

References 24 publications

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“…The optical band gap energies (E g ) of each sample were estimated from absorption coefficients as function of wavelength using Tauc relation: ( h ) n = A h − E g , where A is the relative constant for the material, α is the absorption coefficient and hυ is the photon energy. The index n is a constant associated with electronic transitions (n = 0.5 for direct transitions, n = 2 for indirect transitions) [50]. Figure 4b shows the calculated E g for samples P1, P2, H1 and H2 as 2.50 eV, 2.45 eV, 1.72 eV and 1.90 eV, respectively, which agree with the values obtained by Sivakumar et al [50] and Zhang and Min [51].…”

Section: Resultssupporting

confidence: 85%

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

et al. 2019

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Silver vanadate, especially β-AgVO 3 , have a wide range of technological applications due to remarkable biological, optical, and electrical features. The structure, morphology, and properties of β-AgVO 3 are directly affected by synthesis conditions. A comparative study between two different synthesis routes (precipitation and hydrothermal) of β-AgVO 3 was systematically investigated in this work. X-ray diffraction, Raman spectroscopy, scanning electron microscopy, zeta potential, and UV-visible spectrometry results showed that the hydrothermal method produced more homogeneous samples of β-AgVO 3 , with elevated purity and crystallinity. In addition, the sample of β-AgVO 3 obtained by hydrothermal method had a wire-like morphology while that obtained by precipitation had irregular shape. Finally, the hydrothermal procedure showed more elevated reproducibility.

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Section: Resultssupporting

confidence: 85%

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

et al. 2019

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“…Among them, AgVO 3 is widely reported as an emerging photocatalyst for degradation of the visible-light organic pollutants in waste-water due to its unique properties such as strong absorption in the visible light range, simple preparation, non-toxicity, high electrical conductivity and good crystallinity [34,35]. Besides, AgVO 3 has relatively good photostability like typical vanadium oxide compounds due to its narrow bandgap of less than 2.5 eV, displaying a superior photocatalytic activity in visible-light [36,37]. Unexpectedly, the photocatalytic activity of pure AgVO 3 is still limited due to its low separation efficiency and rapid recombination of photo-excited electron-hole pairs as a result of narrow band gap energy [30].…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

et al. 2018

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In this work, we have synthesized the rod-on-rod–like α-FeOOH/α-AgVO3 nanocomposite photocatalysts with the different amounts of solvothermally synthesized α-FeOOH nanorods via a simple co-precipitation method. The as-synthesized photocatalysts were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, UV−Visible diffuse reflectance spectroscopy, scanning electron microscopy (SEM), element mapping, high-resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS) analysis. The observed SEM images show that both α-AgVO3 and α-FeOOH exhibits the rod-shaped morphology with nano size. Furthermore, the photocatalytic activities of the obtained photocatalysts were evaluated towards the degradation of Rhodamine B (RhB) under visible-light irradiation. It is demonstrated that the 3 mg α-FeOOH added to the α-FeOOH/α-AgVO3 nanocomposite exhibited an enhanced photocatalytic performance as compared with the pure α-AgVO3 and α-FeOOH. This significant improvement can be attributed to the increased photo-excited electron-hole pair separation efficiency, large portion of visible-light absorption ability and the reduced recombination of the electron-hole pair. The recycling test revealed that the optimized nanocomposite exhibited good photostability and reusability properties. In addition, the believable photodegradation mechanism of RhB using α-FeOOH/α-AgVO3 nanocomposite is proposed. Hence, the developed α-FeOOH/α-AgVO3 nanocomposite is a promising material for the degradation of organic pollutants in an aqueous environment.

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“…However, wide band gap (3.2 eV) of TiO 2 caused researchers to reduce band gap of photocatalyst material which exposed to visible light for destruction of organic dyes. A series of compounds with low band gap are vanadates such as BiVO 4 [4,5], FeVO 4 [6,7], AgVO 3 [8,9], Ag 3 VO 4 [10,11], Cu 3 V 3 O 8 [12,13] and Zn 3 V 2 O 8 [14,15]. Cobalt vanadate, as one of the most important family of vanadate materials, have suitable band gap for the destruction of pollutants.…”

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confidence: 99%

Size controllable synthesis of cobalt vanadate nanostructures with enhanced photocatalytic activity for the degradation of organic dyes

Ghiyasiyan-Arani

Masjedi-Arani

Salavati‐Niasari

2016

Journal of Molecular Catalysis A: Chemical

108

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Different types of cobalt vanadate nanostructures such as Co 3 V 2 O 8 , Co 2 V 2 O 7 and CoV 2 O 6 have been successfully prepared via a simple solid-state method. For the first time, cobalt vanadate nanostructures were synthesized via Schiff-base ligand and vanadyl sulfate as a capping agent and vanadium source, respectively. The effect of a Schiff-base ligand (N,N-Bis (salicylaldehyde) ethylenediamine = H 2 salen) as a capping agent, molar ratio of Co: H 2 salen and Co:V on type of products, morphology and size of cobalt vanadate nanoparticles was investigated to reach optimum condition. The as-prepared nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmittance electron microscopy (TEM), Fourier transform infrared (FT-IR) spectra, energy dispersive X-ray microanalysis (EDX) and ultraviolet-visible (UV-Vis) spectroscopy. This work is the first study on photocatalytic activity of cobalt vanadate nanostructures in different conditions. The influence of different parameters such as type of cobalt vanadate nanostructures, type of dye, size of particles and nanostructures dosage as a catalyst on photocatalytic activity of samples were studied.

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AgVO3 nanorods: Synthesis, characterization and visible light photocatalytic activity

Cited by 60 publications

References 24 publications

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

A Facile Synthesis of Visible-Light Driven Rod-on-Rod like α-FeOOH/α-AgVO3 Nanocomposite as Greatly Enhanced Photocatalyst for Degradation of Rhodamine B

Size controllable synthesis of cobalt vanadate nanostructures with enhanced photocatalytic activity for the degradation of organic dyes

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