Kinetics and mechanism of reactions of silver tungstate with mercuric bromoiodide and mercuric chlorobromide in the solid state

Beg, M. A.; Jain, Amita

doi:10.1016/s0277-5387(00)83635-9

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…Different methods of synthesis are employed to obtain AWO crystals with well-defined homogeneous size and morphology [6]. Among these methods, the solid state reaction [21], sol-gel and conventional hydrothermal [31][32][33][34] methods are routinely used. Most of these methods require an extended amount of time for the synthesis of microcrystals as well as extreme conditions [32].…”

Section: Introductionmentioning

confidence: 99%

Surface-dependent properties of α-Ag2WO4: a joint experimental and theoretical investigation

et al. 2020

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α-Ag 2 WO 4 has attracted much attention in recent years due to its unique crystal and electronic structures, which are suitable for a wide range of applications. This work presents a more realistic study, based on first-principles calculations and experimental results, of the potential of α-Ag 2 WO 4 for antibacterial and photocatalytic activity. α-Ag 2 WO 4 material has been successfully synthesized by a coprecipitation method and subjected to microwave irradiation for different times. The as-synthesized microcrystals were structurally characterized by X-ray diffraction, while the morphological aspects were investigated by field emission scanning electron microscopy. The experimental studies and theoretical simulations of α-Ag 2 WO 4 , based on density functional theory calculations, have highlighted several key parameters (surface-dependent) that determine the antibacterial (against Staphylococcus aureus ) and photocatalytic activity (for the degradation of Rhodamine B), and provided some general principles for materials design. We believe that our results offer new insights regarding the local coordination of superficial Ag and W cations (i.e. clusters) on each exposed surface of the corresponding morphology, that dictate the antibacterial and photocatalytic activities of α-Ag 2 WO 4 , a field that has so far remained unexplored. Response to Reviewers:Manuscript ID: TCAC-D-20-00072 Response to reviewersWe acknowledge the Reviewers for their help in improving our manuscript. As can be seen in the revised text, these comments, remarks and suggestions were considered during our revision. Detailed responses, point-by-point, to the reviewers are summarized below and the changes were made along the revised version of the manuscript and were highlighted in red color.

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Section: Introductionmentioning

confidence: 99%

Surface-dependent properties of α-Ag2WO4: a joint experimental and theoretical investigation

et al. 2020

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“…In the past, silver tungstate (α-Ag 2 WO 4 ) ceramics and crystals were initially prepared by different preparation methods such as an oxide mixture or solid-state reaction, − precipitation/calcination at elevated temperatures, as well as with a crystal growth process named “Czochralski” . However, these synthetic methods require high temperatures, longer processing times, and sophisticated equipment with high maintenance costs in addition to the formation of deleterious phases and produce crystals of inhomogeneous sizes and shapes.…”

Section: Introductionmentioning

confidence: 99%

Cluster Coordination and Photoluminescence Properties of α-Ag₂WO₄ Microcrystals

et al. 2012

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In this paper, we report our initial research to obtain hexagonal rod-like elongated silver tungstate (α-Ag(2)WO(4)) microcrystals by different methods [sonochemistry (SC), coprecipitation (CP), and conventional hydrothermal (CH)] and to study their cluster coordination and optical properties. These microcrystals were structurally characterized by X-ray diffraction (XRD), Rietveld refinements, Fourier transform infrared (FT-IR), X-ray absorption near-edge structure (XANES), and extended X-ray absorption fine structure (EXAFS) spectroscopies. The shape and average size of these α-Ag(2)WO(4) microcrystals were observed by field-emission scanning electron microscopy (FE-SEM). The optical properties of these microcrystals were investigated by ultraviolet-visible (UV-vis) spectroscopy and photoluminescence (PL) measurements. XRD patterns and Rietveld refinement data confirmed that α-Ag(2)WO(4) microcrystals have an orthorhombic structure. FT-IR spectra exhibited four IR-active modes in a range from 250 to 1000 cm(-1). XANES spectra at the W L(3)-edge showed distorted octahedral [WO(6)] clusters in the lattice, while EXAFS analyses confirmed that W atoms are coordinated by six O atoms. FE-SEM images suggest that the α-Ag(2)WO(4) microcrystals grow by aggregation and the Ostwald ripening process. PL properties of α-Ag(2)WO(4) microcrystals decrease with an increase in the optical band-gap values (3.19-3.23 eV). Finally, we observed that large hexagonal rod-like α-Ag(2)WO(4) microcrystals prepared by the SC method exhibited a major PL emission intensity relative to α-Ag(2)WO(4) microcrystals prepared by the CP and CH methods.

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ChemInform Abstract: Kinetics and Mechanism of Reactions of Silver Tungstate with Mercuric Bromoiodide and Mercuric Chlorobromide in the Solid State.

Beg

Jain

1993

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Kinetics and mechanism of reactions of silver tungstate with mercuric bromoiodide and mercuric chlorobromide in the solid state

Cited by 9 publications

References 6 publications

Surface-dependent properties of α-Ag2WO4: a joint experimental and theoretical investigation

Surface-dependent properties of α-Ag2WO4: a joint experimental and theoretical investigation

Cluster Coordination and Photoluminescence Properties of α-Ag₂WO₄ Microcrystals

ChemInform Abstract: Kinetics and Mechanism of Reactions of Silver Tungstate with Mercuric Bromoiodide and Mercuric Chlorobromide in the Solid State.

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Kinetics and mechanism of reactions of silver tungstate with mercuric bromoiodide and mercuric chlorobromide in the solid state

Cited by 9 publications

References 6 publications

Surface-dependent properties of α-Ag2WO4: a joint experimental and theoretical investigation

Surface-dependent properties of α-Ag2WO4: a joint experimental and theoretical investigation

Cluster Coordination and Photoluminescence Properties of α-Ag2WO4 Microcrystals

ChemInform Abstract: Kinetics and Mechanism of Reactions of Silver Tungstate with Mercuric Bromoiodide and Mercuric Chlorobromide in the Solid State.

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Cluster Coordination and Photoluminescence Properties of α-Ag₂WO₄ Microcrystals