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2 article(s) from Alem, Halima

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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Full Research Paper

Published 19 Dec 2017

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ZnO nanoparticles sensitized by CuInZn_xS₂₊_x quantum dots as highly efficient solar light driven photocatalysts

Florian Donat,
Serge Corbel,
Halima Alem,
Steve Pontvianne,
Lavinia Balan,
Ghouti Medjahdi and
Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 1080–1093, doi:10.3762/bjnano.8.110

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Figure 1: (a) TEM image of ZCIS QDs and (b) the corresponding size distribution. TEM and HR-TEM images of (c)...

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Figure 2: (a) SEM image of the ZnO/ZCIS composite. Elemental mapping of the ZnO/ZCIS composite heated at 400 ...

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Figure 3: High-resolution XPS spectra of (a) Zn 2p_3/2 and (b) O 1s in ZnO and in the ZnO/ZCIS composite.

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Figure 4: Band structure of ZnO and ZCIS QDs and redox potentials of O₂/O₂^•− and ^•OH/H₂O couples.

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Figure 5: (a) Influence of the Orange II concentration and (b) of the ZnO/ZCIS catalyst loading on the photod...

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Figure 6: (a) Influence of pH and (b) of phosphates and carbonates on the photocatalytic activity of the ZnO/...

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Figure 7: Influence of some transition metal chlorides used at 100 µM concentration on the photocatalytic eff...

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Figure 8: Recyclability of the ZnO/ZCIS photocatalyst.

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Figure 9: Concentration of (a) hydroxyl and (b) superoxide radicals and (c) hydrogen peroxide produced by ZnO...

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Figure 10: (a) Time evolution of SOSG−endoperoxide (SOSG-EP) photoluminescence (PL) intensity upon irradiation...

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Figure 11: (a) Influence of ^•OH, O₂^•−, electron and hole scavengers and (b) influence of ¹O₂ scavengers on the...

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Figure 12: Schematic illustration of the charge transfer process and of the ROS production in the ZnO/ZCIS pho...

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Published 17 May 2017

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

ZnO nanoparticles sensitized by CuInZnxS2+x quantum dots as highly efficient solar light driven photocatalysts

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

ZnO nanoparticles sensitized by CuInZn_xS₂₊_x quantum dots as highly efficient solar light driven photocatalysts