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2 article(s) from Girot, Emilien

CdSe nanorod/TiO₂ nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity

Fakher Laatar,
Hatem Moussa,
Halima Alem,
Lavinia Balan,
Emilien Girot,
Ghouti Medjahdi,
Hatem Ezzaouia and
Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 2741–2752, doi:10.3762/bjnano.8.273

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Figure 1: TEM images of (a) TiO₂, (b) CdSe nanorods and (c) the CdSe (2 wt %)/TiO₂ composite. (d) HR-TEM imag...

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Figure 2: X-ray diffraction patterns of (a) CdSe and (b) TiO₂ and CdSe/TiO₂ composites with varying CdSe wt %...

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Figure 3: Raman spectra of TiO₂ and CdSe/TiO₂ composites.

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Figure 4: (a) UV–visible absorption spectra of TiO₂ and CdSe/TiO₂ composites, (b) plots of transformed Kubelk...

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Figure 5: High-resolution XPS spectra of the CdSe (2 wt %)/TiO₂ composite: (a) Cd 3d, where Cd 3d_5/2 (blue) a...

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Figure 6: (a) Photocatalytic activity of TiO₂ and CdSe/TiO₂ composites for the degradation of RhB under simul...

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Figure 7: (a) Effect of the catalyst concentration on the photodegradation efficiency (25, 50 or 100 mg of ph...

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Figure 8: Influence of pH on the degradation of rhodamine B using the CdSe (2 wt %)/TiO₂ photocatalyst.

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Figure 9: (a) UV–visible spectral evolution of rhodamine B as a function of irradiation time using the CdSe (...

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Figure 10: Recycling of the CdSe (2 wt %)/TiO₂ catalyst in the degradation of RhB under simulated solar light ...

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Figure 11: Schematic of the charge separation in the CdSe/TiO₂ photocatalyst under (a) solar light and (b) vis...

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Published 19 Dec 2017

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High performance Ce-doped ZnO nanorods for sunlight-driven photocatalysis

Bilel Chouchene,
Tahar Ben Chaabane,
Lavinia Balan,
Emilien Girot,
Kevin Mozet,
Ghouti Medjahdi and
Raphaël Schneider

Beilstein J. Nanotechnol. 2016, 7, 1338–1349, doi:10.3762/bjnano.7.125

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Scheme 1: Schematic illustration of the synthesis of the Ce-doped ZnO rods.

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Figure 1: (a) XRD patterns of ZnO and Ce-doped ZnO rods and (b) magnification from 30 to 38°.

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Figure 2: Raman spectra of ZnO and ZnO:Ce rods.

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Figure 3: XPS analysis of the prepared ZnO:Ce (5%) rods. (a) Survey scan, and high resolution scans of (b) Zn...

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Figure 4: Room temperature UV–visible diffuse reflectance spectra of ZnO and Ce-doped ZnO rods.

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Figure 5: TEM images of (a) ZnO rods and (b–f) ZnO rods doped with 1, 3, 5, 7 and 10% Ce, respectively.

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Figure 6: (a) HRTEM image of 5% Ce-doped ZnO rods, and (b) TEM image of the 10% Ce-doped ZnO rods showing CeO₂...

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Figure 7: N₂ adsorption/desorption curves at 77 K for ZnO and 5%-doped ZnO rods, giving surface areas of 21.7...

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Figure 8: (a) Influence of the doping in Ce of ZnO rods for the degradation of Orange II in aqueous solution (...

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Figure 9: Influence of the pH of the Orange II solution on the photocatalytic activity of 5% Ce-doped ZnO rod...

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Figure 10: Effects of (a) the catalyst amount and (b) the dye concentration on the photocatalytic activity of ...

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Figure 11: Effects of various salts on the photocatalytic efficiency of the ZnO:Ce rods used under solar light...

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Figure 12: Effects of (a) transition metal salts and (b) of organic compounds and Na₂S on the photocatalytic e...

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Figure 13: Recyclability of the ZnO:Ce photocatalyst.

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Figure 14: Influence of t-BuOH, benzoquinone and oxalic acid used as ^•OH, O₂^•− and h⁺ scavengers, respectively...

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Scheme 2: Schematic representation of the photocatalytic activity of ZnO:Ce rods.

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Published 26 Sep 2016

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CdSe nanorod/TiO2 nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity

High performance Ce-doped ZnO nanorods for sunlight-driven photocatalysis

CdSe nanorod/TiO₂ nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity