• Article dans une revue

Comparison of competition between T = O and T-OH groups in vanadium, niobium, tantalum BEA zeolite and SOD based zeolites

Anna Wojtszek, Maria Zioleck, Stanislaw Dzwigaj, Frederik Tielens

The investigation of intra framework substitution of Si by group V transition metals (V, Nb, Ta) is an important strategy to modify or to tune the catalytic properties of zeolites. Theoretically one of the limitations is the size of the zeolite unit cell. In this study the energy and geometry of…

Chemical Physics Letters, 2011, 514, pp.70-73. ⟨10.1016/j.cplett.2011.08.005⟩. ⟨hal-00666258⟩

• Article dans une revue

Contribution to the understanding of the formation mechanism of bimodal mesoporous MCM41-type silica with large defect cavities

Claudia Bernal, Monica Mesa, Maguy Jaber, Jean-Louis Guth, Ligia Sierra

The formation mechanism of large defect cavities (∅ 11-23 nm) beside the MCM41 mesopores (∅ ∼ 2.3 nm), was studied from mixtures of sodium silicate, cetyl trimethyl ammonium bromide (CTAB) and ethyl acetate (EtAc) with the molar composition 1 SiO2; 1 Na2O; x CTAB; y EtAc: 237 H2O (with x = 0.33 or…

Microporous and Mesoporous Materials, 2011, 153, pp.217-226. ⟨10.1016/j.micromeso.2011.12.049⟩. ⟨hal-00688611⟩

• Article dans une revue

Influence of the Ticontent on the photocatalyticoxidation of 2-propanol and CO on TiSiBEA zeolites

Stanislaw Dzwigaj, Jean-Philippe Nogier, Michel Che, M. Saito, Takuya Hosokawa, Estelle Thouverez, Masay Matsuoka, M. Anpo

TixSiBEA (x = 1.5, 3.2 and 5.8 Ti wt.%) zeolites were prepared by a two-step postsynthesis method reported earlier (Chem. Commun. 1998, 87). Diffuse reflectance (DR) UV-vis and photoluminescence data suggest that mainly isolated tetrahedral framework Ti ions are present in Ti1.5SiBEA and Ti3.2SiBEA…

Catalysis Communications, 2012, 19, pp.17-20. ⟨10.1016/j.catcom.2011.12.010⟩. ⟨hal-00687271⟩

• Article dans une revue

DFT study of the M segregation on MAu alloys (M = Ni, Pd, Pt) in presence of adsorbed oxygen O and O2

Adnene Dhouib, Hazar Guesmi

Segregation phenomena of group 10 (M = Ni, Pd, Pt) transition-metals substituted in Au (1 1 1) surface and sub-surface layers are investigated by DFT periodic calculations in presence of adsorbed atomic and molecular oxygen. In contrast with vacuum conditions, where the metal impurities M prefer to…

Chemical Physics Letters, 2011, 521, pp.98-103. ⟨10.1016/j.cplett.2011.11.050⟩. ⟨hal-00690803⟩

• Article dans une revue

Unravelling the enhanced reactivity of bulk CeO2 doped with gallium: A periodic DFT study

Paola Quaino, Olga Syzgantseva, Luca Siffert, Frederik Tielens, Christian Minot, Monica Calatayud

Doping CeO2 with gallium leads to promising materials with application in hydrogen purification processes for fuel cells. The bulk ceria-gallia is investigated by ab initio calculations. The outstanding reactivity is explained by important relaxations induced by gallium in the ceria host, having a…

Chemical Physics Letters, 2011, 519-520, pp.69-72. ⟨10.1016/j.cplett.2011.11.022⟩. ⟨hal-00690790⟩

• Article dans une revue

An easy way to obtain thin gold film on silica glass substrate by chemical method

Anne-Félicie Lamic-Humblot, Sandra Casale, Cédric Leger, S. Alpérine, Catherine Louis

Physical methods of metal deposition under ultra-high vacuum conditions are currently used to manufacture electrically conductive surfaces. In the case of silica glass, a supplementary oxide layer is usually required to avoid the uncontrolled growth of metal nanoparticles on the surface. Here, we…

Thin Solid Films, 2013, 539, pp.151-153. ⟨10.1016/j.tsf.2013.05.085⟩. ⟨hal-00907371⟩

• Article dans une revue

Biomineralization Patterns of Intracellular Carbonatogenesis in Cyanobacteria: Molecular Hypotheses

Jinhua Li, Isabel Margaret-Oliver, Nithavong Cam, Thomas Boudier, Marine Blondeau, Eric Leroy, Julie Cosmidis, Feriel Skouri-Panet, Jean-Michel Guigner, Céline Férard, Melanie Poinsot, David Moreira, Purificacion Lopez-Garcia, Corinne Cassier-Chauvat, Franck Chauvat, Karim Benzerara

The recent discovery of intracellular carbonatogenesis in several cyanobacteria species has challenged the traditional view that this process was extracellular and not controlled. However, a detailed analysis of the size distribution, chemical composition and 3-D-arrangement of carbonates in these…

Minerals, 2016, 6 (1), pp.10. ⟨10.3390/min6010010⟩. ⟨hal-01310553⟩

• Communication dans un congrès

Electron transfers in TiO₂-containing zeolites

A. Legrand, A. Moissette, M. Hureau, S. Casale, P. Massiani, H. Vezin, A.S. Mamede, I. Batonneau-Gener

• Article dans une revue

Enzymatic Approach in Calcium Phosphate Biomineralization: A Contribution to Reconcile the Physicochemical with the Physiological View

Clément Guibert, Jessem Landoulsi

Biomineralization is the process by which organisms produce hard inorganic matter from soft tissues with outstanding control of mineral deposition in time and space. For this purpose, organisms deploy a sophisticated “toolkit” that has resulted in significant evolutionary innovations, for which…

International Journal of Molecular Sciences, 2021, 22 (23), pp.12957. ⟨10.3390/ijms222312957⟩. ⟨hal-03479544⟩

• Article dans une revue

Spatially controlled positioning of coordination polymer nanoparticles onto heterogeneous nanostructured surfaces

V. Trannoy, M. Faustini, David Grosso, F. Brisset, P. Beaunier, E. Rivière, Magali Putero, A. Bleuzen

Prussian Blue Analog (PBA) nanoparticles were formed on a heterogeneous nanostructured surface made of an ordered nanoperforated titanium oxide thin film deposited on a gold layer. The study of the nanocomposite film by grazing-incidence wide angle X-ray scattering, infrared spectroscopy, scanning…

Nanoscale, 2017, 9 (16), pp.5234-5243. ⟨10.1039/C7NR00024C⟩. ⟨hal-02012316⟩