Effect of Na content and thermal treatment of titanate nanotubes on the photocatalytic degradation of formic acid

Turki, Asma; Kochkar, Hafedh; Guillard, C.; Berhault, Gilles; Ghorbel, Abdelhamid

doi:10.1016/j.apcatb.2013.03.020

Cited by 103 publications

(67 citation statements)

References 94 publications

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“…Phase structure, morphology, specific surface area and pore size distribution strongly depend on the sodium content and the calcination temperature. Results demonstrate that sodium mainly influences the structural transformation of titanate into anatase through a slower dehydration process that shifts the transformation of titanate into anatase to a higher temperature [363]. However, the presence of sodium is not a pre-requisite for preserving the nanotubular morphology.…”

Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 86%

“…The influence of sodium on the textural, structural, morphological and photocatalytic properties of titanate nanotubes calcined at different temperatures has been extensively studied [363]. The characterization results clearly emphasize the role of sodium in structural and morphological transformations.…”

Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 99%

“…Moreover, the bands in the 550-750 cm À 1 range assigned to covalent Ti-O-H bonds tend to become broader in the H-TNT sample. This broadening tendency can be assigned to higher water content in the H-TNT nanotubular titanate structure [363].…”

Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 99%

“…Sodium also hinders the formation of pure anatase samples since residual sodium coming from the initial titanate phase tends to readily react with anatase to form a hexatitanate phase. These structural differences influence the photocatalytic activity of titanate nanotubes [363].…”

Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 99%

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Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Kukovecz

Kordás

Kiss

2016

Surface Science Reports

104

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Titanates are salts of polytitanic acid that can be synthesized as nanostructures in a great variety concerning crystallinity, morphology, size, metal content and surface chemistry.Titanate nanotubes (open-ended hollow cylinders measuring up to 200 nm in length and 15 nm in outer diameter) and nanowires (solid, elongated rectangular blocks with length up to 1500 nm and 30-60 nm diameter) are the most widespread representatives of the titanate nanomaterial family. This review covers the properties and applications of these two materials from the surface science point of view. Dielectric, vibrational, electron and X-ray spectroscopic results are comprehensively discussed first, then surface modification methods including covalent functionalization, ion exchange and metal loading are covered. The versatile surface chemistry of onedimensional titanates renders them excellent candidates for heterogeneous catalytic, photocatalytic, photovoltaic and energy storage applications, therefore, these fields are also reviewed.

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Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 86%

Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 99%

Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 99%

Section: Phase Stability and Phase Transformation Of Titanate Nanostrmentioning

confidence: 99%

See 2 more Smart Citations

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Kukovecz

Kordás

Kiss

2016

Surface Science Reports

104

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“…annealed at 400 ⁰C 724 were also used for degradation of brilliant red X-3B from aqueous solution. The influence of sodium on the photocatalytic properties has also been analyzed 725 . For example, at low annealing temperatures (< 500 ⁰C) the Na-TNT nanotubes did not show a significant activity in the degradation of formic acid, but with removal of Na, nanotubes annealed at 400⁰C presented an enhanced photocatalytic activity in the degradation of formic acid.…”

Section: Dopingmentioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

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A Facile Molecular Precursor‐based Synthesis of Ag₂Se Nanoparticles and Its Composites with TiO₂ for Enhanced Photocatalytic Activity

Mishra

Jeanneau

et al. 2016

Chemistry An Asian Journal

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The reactions of different silver(I) reagents AgX (X(-) =iodide, trifluoroacetate, triflate) with selenoethers R2 Se (R=Me, tBu) in a variety of solvents were investigated in relation with their use as precursors for Ag2 Se nanomaterials. Different reaction conditions led to different reactivities and afforded either molecular complexes or metal selenide nanoparticles. The reactions leading to in situ formation of the metal selenide nanoparticles were then extended in the presence of commercial TiO2 (P25) to prepare silver selenide-titania nanocomposites with different Ag/Ti ratios. These nanocomposites, well characterized by elemental analysis (Ag, Se), PXRD, TEM, BET, XPS and UV/Vis studies, were investigated as photocatalysts for the degradation of formic acid (FA) solution. The xAg2 Se-TiO2 nanocomposites (x=0.01, 0.13 and 0.25 mol %) exhibited a much higher catalytic activity as compared to P25, which is an established benchmark for the photocatalysis under UV light, and retained a good photocatalytic stability after recycling for several times.

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Effect of Na content and thermal treatment of titanate nanotubes on the photocatalytic degradation of formic acid

Cited by 103 publications

References 94 publications

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

A Facile Molecular Precursor‐based Synthesis of Ag₂Se Nanoparticles and Its Composites with TiO₂ for Enhanced Photocatalytic Activity

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Effect of Na content and thermal treatment of titanate nanotubes on the photocatalytic degradation of formic acid

Cited by 103 publications

References 94 publications

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

Atomic scale characterization and surface chemistry of metal modified titanate nanotubes and nanowires

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

A Facile Molecular Precursor‐based Synthesis of Ag2Se Nanoparticles and Its Composites with TiO2 for Enhanced Photocatalytic Activity

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Product

Resources

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A Facile Molecular Precursor‐based Synthesis of Ag₂Se Nanoparticles and Its Composites with TiO₂ for Enhanced Photocatalytic Activity