Mechanochemical reactions between Ag2O and V2O5 to form crystalline silver vanadates

Kittaka, Shigeharu; Nishida, Sachie; Ohtani, Toshio

doi:10.1016/s0022-4596(02)00037-3

Cited by 14 publications

(11 citation statements)

References 12 publications

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“…Konta et al [183] reported that Ag 3 VO 4 showed a competent activity for the evolution of O 2 from an aqueous silver nitrate solution under visible light irradiation. Since then silver vanadate (Ag 3 VO 4 ) material had attracted much attention [184][185][186][187]. It has been reported that WO 3 [188,189], RbPb 2 Nb 3 O 10 [188], BiVO 4 [188,189], Bi 2 WO 6 [189], chromium/antimony-doped TiO 2 [190], AgNbO 3 [191], and Ag 3 VO 4 [183] are visible light driven photocatalysts for the evolution of O 2 from water, containing a sacrificial reagent.…”

Section: A Glance To the Photoactivity Of Other Metal Oxidesmentioning

confidence: 99%

An Enthusiastic Glance in to the Visible Responsive Photocatalysts for Energy Production and Pollutant Removal, with Special Emphasis on Titania

Silija

Yaakob

Viswanathan

et al. 2012

International Journal of Photoenergy

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As a consequence of the rapid growth of industry, major problems are created related to energy and environment. Sunlight being one of the most potential alternative source of energy, the development of efficient solar-energy storage systems is an important subject in the fields of science and technology. Here we have reviewed and summarized some of the recent reports on visible responsive photocatalysts. In this review, the influence of various metal oxide photocatalysts on energy production and pollutant removal are presented with special emphasis on titania based photocatalysts. The photoactivity of titania for various pollutant degradation, modified titania (TiO2) systems, their physical and chemical characteristics, and so forth, are described in detail at this juncture. Different methods used to enhance the visible light absorption of TiO2, like doping with metals and nonmetals, coupling with other metal oxides, and so forth, have been discussed. Various applications of photocatalysts including photocatalytic treatment of waste water, pesticide degradation and water splitting to produce hydrogen are summarized. The development of photocatalysts that function under visible light for the efficient utilization of sunlight is an area of current interest and thus the different methods of preparation for the visible active photocatalysts are also explored.

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Section: A Glance To the Photoactivity Of Other Metal Oxidesmentioning

confidence: 99%

An Enthusiastic Glance in to the Visible Responsive Photocatalysts for Energy Production and Pollutant Removal, with Special Emphasis on Titania

Silija

Yaakob

Viswanathan

et al. 2012

International Journal of Photoenergy

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“…Various techniques, such as mechanochemical reactions 22 , oxide mixture or solid-state reaction 2 , precipitation with calcination at long times 2 , and molten metal fluxes 23 have been reported. However, these methods require high temperatures, long processing times, and sophisticated equipment with high maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Disclosing the electronic structure and optical properties of Ag₄V₂O₇crystals: experimental and theoretical insights

et al. 2016

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This work combines experimental and computational techniques to exploit the best of both methodologies and thus provide a tool for understanding the geometry, cluster coordination, electronic structure, and optical properties of Ag4V2O7 crystals. This tool has been developed to create structural models and enable a much more complete and rapid refinement of 3D (Third Dimension) structures from limited data, aiding the determination of structure-property relationships and providing critical input for materials simulations. Ag4V2O7 crystals were synthesized by a simple precipitation method from aqueous solution at 30 °C for 10 min. The obtained crystals were characterized by X-ray diffraction (XRD) and Rietveld refinement, and micro-Raman spectroscopy. The crystal morphology was determined by field emission scanning electron microscopy (FESEM), and the optical properties were investigated by ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy and photoluminescence (PL) measurements. The geometric and electronic structures of Ag4V2O7 crystals were investigated by first-principles quantum-mechanical calculations based on the density functional theory. The theoretical results meet the experimental data to confirm that Ag4V2O7 crystals have an orthorhombic structure, and that the building blocks of the lattice comprise two types of V clusters, [VO4] and [VO5], and two types of Ag clusters, [AgO5] and [AgO6]. This type of fundamental studies, which combine multiple experimental methods and first-principles calculations, have been proved valuable to obtain a basic understanding of the local structure, bonding, electronic, and optical properties of Ag4V2O7 crystals.

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“…In order to further improve the photocatalytic efficiency, constructing the heterojunction structure is an effective Until now, several methods have been reported for the synthesis of heterogeneous photocatalyst 24,25 . Yet, it is desirable to use hydrothermal treatment, for numerous advantages, such as controllable particle size, high crystallinity and purity by using mild synthesis temperature and simple process configuration 26,27 .…”

Section: Introductionmentioning

confidence: 99%

Quasi-Hexagonal VO2/Ag3VO4 Microcrystals for Photo-Catalytic Degradation of Rhodamine B

Tao¹,

Qing²,

Wu³

et al. 2014

Asian J. Chem.

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Quasi-hexagonal VO2/Ag3VO4 heterogeneous photocatalyst was successfully synthesized via a hydrothermal method. Detailed characterization was carried out based on X-ray powder diffraction pattern, scanning electron microscopy, UV-visible diffuse-reflectance spectroscopy. The as-prepared samples exhibited strong absorption in the UV-light region and displayed excellent UV-light-driven photocatalytic activities and stabilities in degradation of Rhodamine B under UV-light irradiation (λ = 400 nm). This enhanced photocatalytic activity might be attributed to the heterogeneous structure.

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Mechanochemical reactions between Ag2O and V2O5 to form crystalline silver vanadates

Cited by 14 publications

References 12 publications

An Enthusiastic Glance in to the Visible Responsive Photocatalysts for Energy Production and Pollutant Removal, with Special Emphasis on Titania

An Enthusiastic Glance in to the Visible Responsive Photocatalysts for Energy Production and Pollutant Removal, with Special Emphasis on Titania

Disclosing the electronic structure and optical properties of Ag₄V₂O₇crystals: experimental and theoretical insights

Quasi-Hexagonal VO2/Ag3VO4 Microcrystals for Photo-Catalytic Degradation of Rhodamine B

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Mechanochemical reactions between Ag2O and V2O5 to form crystalline silver vanadates

Cited by 14 publications

References 12 publications

An Enthusiastic Glance in to the Visible Responsive Photocatalysts for Energy Production and Pollutant Removal, with Special Emphasis on Titania

An Enthusiastic Glance in to the Visible Responsive Photocatalysts for Energy Production and Pollutant Removal, with Special Emphasis on Titania

Disclosing the electronic structure and optical properties of Ag4V2O7crystals: experimental and theoretical insights

Quasi-Hexagonal VO2/Ag3VO4 Microcrystals for Photo-Catalytic Degradation of Rhodamine B

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Disclosing the electronic structure and optical properties of Ag₄V₂O₇crystals: experimental and theoretical insights