Search results for: Giovanni Ferraris

Items from 1 to 20 out of 31 results

article

José Lima‐de‐Faria (1925–2018)

Giovanni Ferraris

Journal of Applied Crystallography > 51 > 5 > 1507 - 1508

Obituary for José Lima‐de‐Faria.

article

Crystal Clear. The Autobiographies of Sir Lawrence & Lady Bragg. Edited by A. M. Glazer and Patience Thomson. Oxford University Press, 2015. Pp. xx + 427. Hardback. Price GBP 35.00. ISBN 978‐0‐19‐874430‐6.

Giovanni Ferraris

Acta Crystallographica Section A > 72 > 4 > 510 - 511

article

Perspectives in Crystallography. By John R. Helliwell. CRC Press, 2016. Hardback, Pp. xv + 155. Price GBP 75.65. ISBN 978‐1‐4987‐3210‐9.

Giovanni Ferraris

Acta Crystallographica Section A > 72 > 4 > 512 - 513

article

The centennial of X-ray diffraction (1912–2012)

Annibale Mottana, Giovanni Ferraris, Maurizio Brunori

Rendiconti Lincei > 2013 > 24 > 1 > 1-5

article

Catalysts based on Rh(III)-hexamolybdate/γ-Al2O3 and their application in the selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde

Guillermo R. Bertolini, Carmen I. Cabello, Mercedes Muñoz, Mónica Casella, more

Journal of Molecular Catalysis. A, Chemical > 2013 > 366 > Complete > 109-115

Several catalysts based on [RhMo ₆ O ₂₄ H ₆ ] ³⁻ (RhMo ₆ ) heteropolyanion supported on γ-Al ₂ O ₃ with different textural properties were prepared, characterized and tested in the liquid-phase hydrogenation of cinnamaldehyde. The characterization of pure and supported systems was carried out using several techniques including XRD, SEM-EDS microscopy,...

article

Structural Mineralogy and Inorganic Crystal Chemistry. By Sergey V. Krivovichev. St Petersburg University Press, 2009. Pp. 398. (Hardbound) Price unknown. ISBN 978‐5‐288‐05004‐6.

Giovanni Ferraris

Acta Crystallographica Section B > 68 > 1 > 98 - 99

article

High-Temperature Resistivity of Dense Mats of Single-Walled Carbon Nanotube Bundles

Alessandro Latini, Daniele Gozzi, Giovanni Ferraris, Laura Lazzarini

The Journal of Physical Chemistry C > 2011 > 115 > 22 > 11023 - 11029

article

A Mössbauer and structural investigation of Fe-ZSM-5 catalysts: Influence of Fe oxide nanoparticles size on the catalytic behaviour for the NO-SCR by C3H8

Giuseppe Fierro, Giuliano Moretti, Giovanni Ferraris, Giovanni B. Andreozzi

Applied Catalysis B: Environmental > 2011 > 102 > 1-2 > 215-223

In this work some results concerning a spectroscopic and structural characterization of two Fe-ZSM-5 (Si/Al=25) catalysts (Fe=1.31wt% and 8.40wt%), prepared by the ion-exchange method, are reported. The final catalysts, obtained by calcination in air at 773K, were investigated by Mössbauer spectroscopy as well as by XRD, DRS and porosimetry together with the H-ZSM-5 parent material. In consequence...

article

Wakefieldite-(Y) from Montaldo di Mondovì (Italy): new data and crystal structure

Marcella Cadoni, Marco E. Ciriotti, Giovanni Ferraris

Rendiconti Lincei > 2011 > 22 > 4 > 307-314

Wakefieldite-(Y) with approximate composition (Y_0.40Nd_0.15Ce_0.15Ca_0.15Th_0.15)(V_0.92As_0.08)O₄ is reported from an abandoned Fe- and Mn-ore mines located at Montaldo di Mondovì, Piedmont, Italy. The zircon-type crystal structure (space group I4₁/amd; a = 7.2591 Å, c = 6.4255 Å) has been refined (R = 0.017 for 175 independent reflections) using X-ray diffraction data collected on a crystal from this...

article

Synthesis and crystal structure of Na₂MnSi₄O₁₀: relationship with the manaksite group

Marcella Cadoni, Giovanni Ferraris

Rendiconti Lincei > 2011 > 22 > 3 > 225-234

Na₂MnSi₄O₁₀ has been hydrothermally synthesized from gel kept in a Teflon-lined autoclave at 225°C for 10 days. Its $$P \bar{1} $$ crystal structure has been solved from single-crystal X-ray diffraction data and anisotropically refined to R = 0.025. Being the structure isotypic with that of NaKMnSi₄O₁₀ (manaksite), it is referred to a manaksite-like cell (a = 6.946 Å, b = 7.846 Å, c = 9.974 Å,...

article

New RE microporous heteropolyhedral silicates containing 4¹5¹6¹8² tetrahedral sheets

Marcella Cadoni, Yan Ling Cheah, Giovanni Ferraris

Acta Crystallographica Section B > 66 > 2 > 158 - 164

Four heteropolyhedral microporous silicates, A₃RESi₆O₁₅·2.25H₂O, crystallizing in the Cmm2 space group and based on 4¹5¹6¹8² tetrahedral sheets [A₃ = Na_2.74K_0.26, RE = Ce, abbreviated as TR05; TR06: A₃ = Na_2.72K_0.28, RE = La; TR07: A₃ = Na₃, RE = La; TR08: A₃ = Na_2.74(H₃O)_0.26, RE = La_0.68Eu_0.32] have been hydrothermally synthesized in Teflon‐lined autoclaves at 503 K and structurally characterized...

article

Two new silicate structures based on a rhodesite‐type heteropolyhedral microporous framework

Marcella Cadoni, Giovanni Ferraris

Acta Crystallographica Section B > 66 > 2 > 151 - 157

Two new members of the mero‐plesiotype rhodesite series [Sr₂Na₂(Si₈O₁₉)·4H₂O, abbreviated as TR09; SrNa₄(Si₈O₁₉)·4H₂O, TR10] have been hydrothermally synthesized in Teflon‐lined autoclaves at 503 K and structurally characterized using X‐ray diffraction single‐crystal data. The crystal structures were solved by direct methods and refined to R = 0.021 [TR09; 3317 reflections with I_o > 2σ(I_o)] and...

article

CuO nanoparticles entrapped in MFI framework: Investigation of textural, magnetic and catalytic properties of Cu-ZSM-5 and Cu-S-1 catalysts

Giuseppe Fierro, Giovanni Ferraris, Giuliano Moretti

Applied Catalysis B: Environmental > 2009 > 91 > 1-2 > 499-506

Cu-ZSM-5 zeolites are active catalysts for both NO decomposition and selective catalytic reduction (SCR) of NO by hydrocarbons in the presence of oxygen. Unfortunately they suffer of deactivation in the presence of water vapour in the feed that is mainly due to either the segregation of the initial extra-framework copper ions, or the sintering of the entrapped CuO-like species, to form large CuO aggregates...

article

Synthesis and characterization of porous glycidylmethacrylate–divinylbenzene monoliths using the high internal phase emulsion approach

Andrea Barbetta, Mariella Dentini, Lorenzo Leandri, Giovanni Ferraris, more

Reactive and Functional Polymers > 2009 > 69 > 9 > 724-736

Highly porous monoliths were synthesised using glycidyl methacrylate (GMA) and divinylbenzene in the presence of a porogen, and emulsion templating as the preparation technique (polyHIPEs). Two surfactants were used as the emulsion stabiliser. It turned out that the choice of the surfactant was essential for the successful synthesis of polyHIPEs containing large amount of the functional monomer GMA,...

article

Bulk and surface structures of V2O5/ZrO2 catalysts for n-butane oxidative dehydrogenation

Delia Gazzoli, Sergio De Rossi, Giovanni Ferraris, Giorgio Mattei, more

Journal of Molecular Catalysis. A, Chemical > 2009 > 310 > 1-2 > 17-23

The present investigation focuses on the structural properties and reactivity of zirconia-supported vanadium oxide catalysts, prepared by equilibrium adsorption in basic (pH 10) or in acid (pH 2.7) conditions with vanadium content up to 6wt.% (pH 10) and up to 11.6wt.% (pH 2.7). The samples, heated at 823K for 5h in air, were characterized by X-ray diffraction, Raman spectroscopy and TPR, both as...

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Morphological and textural characterization of vanadium oxide supported on zirconia by ionic exchange

Delia Gazzoli, Sergio De Rossi, Giovanni Ferraris, Mario Valigi, more

Applied Surface Science > 2008 > 255 > 5 Part 1 > 2012-2019

Zirconia-supported vanadium oxide samples containing vanadium up to 6.8wt.% were prepared by ionic exchange using aqueous solution of peroxovanadate complexes and hydrous zirconium oxide. The samples, heated at 823K for 5h in air, were studied by several techniques, including X-ray diffraction, surface area determinations, diffuse reflectance spectroscopy (UV–vis), Raman spectroscopy, pore size distribution...

article

NO and N2O decomposition and their reduction by hydrocarbons over Fe–Zn manganite spinels

Giuseppe Fierro, Roberto Dragone, Giovanni Ferraris

Applied Catalysis B: Environmental > 2008 > 78 > 1-2 > 183-191

In this work the catalytic behaviour of zinc manganite-based catalysts doped with iron in small amounts is reported for the reduction of NO by propane and propene. All catalysts are monophasic and are characterized by a spinel structure. On the most representative catalysts the NO and N ₂ O decomposition and the reduction of N ₂ O by propane and propene were also investigated. The...

article

H2 reduction behavior and NO/N2O abatement catalytic activity of manganese based spinels doped with copper, cobalt and iron ions

Giuseppe Fierro, Giovanni Ferraris, Roberto Dragone, Mariano Lo Jacono, more

Catalysis Today > 2006 > 116 > 1 > 38-49

In this work results concerning a study of the effect of Cu, Co, Fe metal ions on the redox properties and on the catalytic behavior of zinc manganite spinels in reactions for the abatement of NO and N ₂ O are reported. These solids were prepared by thermal decomposition in air at 723 and 973K of monophasic carbonate precursors. The catalyst reduction in H ₂ was investigated by temperature-programmed...

article

Assessment of Inorganic Fibre Burden in Biological Samples by Scanning Electron Microscopy – Energy Dispersive Spectroscopy

Elena Belluso, Donata Bellis, Elisa Fornero, Silvana Capella, more

Microchimica Acta > 2006 > 155 > 1-2 > 95-100

. A protocol to detect inorganic fibres in samples of biological tissues by SEM–EDS is proposed. The sample (500 mg in the case of lung tissue) is digested by NaClO, filtered using a sample holder and fixed onto a SEM stub by clarification. A total of 800 microscopic fields (MF) at 2000× are scanned along 5 parallel strips of the filter preparation at regular intervals for a total area of 1.85 mm²...

article

Dimeric Cu(I) species in Cu-ZSM-5 catalysts: the active sites for the NO decomposition

Giuliano Moretti, Giovanni Ferraris, Giuseppe Fierro, Mariano Lo Jacono, more

Journal of Catalysis > 2005 > 232 > 2 > 476-487

In this study data are presented which support the view that a special configuration of dimeric Cu(I) species in Cu-ZSM-5 catalysts may be the active site for NO decomposition. Such dimeric Cu(I) species, produced by self-reduction of Cu(II) during the thermal activation of Cu-ZSM-5 catalysts in He or under vacuum, are the sites where N ₂ is generated from two adsorbed NO molecules, and from...

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INFONA - science communication portal

Search results for: Giovanni Ferraris

José Lima‐de‐Faria (1925–2018)

Crystal Clear. The Autobiographies of Sir Lawrence & Lady Bragg. Edited by A. M. Glazer and Patience Thomson. Oxford University Press, 2015. Pp. xx + 427. Hardback. Price GBP 35.00. ISBN 978‐0‐19‐874430‐6.

Perspectives in Crystallography. By John R. Helliwell. CRC Press, 2016. Hardback, Pp. xv + 155. Price GBP 75.65. ISBN 978‐1‐4987‐3210‐9.

The centennial of X-ray diffraction (1912–2012)

Catalysts based on Rh(III)-hexamolybdate/γ-Al2O3 and their application in the selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde

Structural Mineralogy and Inorganic Crystal Chemistry. By Sergey V. Krivovichev. St Petersburg University Press, 2009. Pp. 398. (Hardbound) Price unknown. ISBN 978‐5‐288‐05004‐6.

High-Temperature Resistivity of Dense Mats of Single-Walled Carbon Nanotube Bundles

A Mössbauer and structural investigation of Fe-ZSM-5 catalysts: Influence of Fe oxide nanoparticles size on the catalytic behaviour for the NO-SCR by C3H8

Wakefieldite-(Y) from Montaldo di Mondovì (Italy): new data and crystal structure

Synthesis and crystal structure of Na₂MnSi₄O₁₀: relationship with the manaksite group

New RE microporous heteropolyhedral silicates containing 4¹5¹6¹8² tetrahedral sheets

Two new silicate structures based on a rhodesite‐type heteropolyhedral microporous framework

CuO nanoparticles entrapped in MFI framework: Investigation of textural, magnetic and catalytic properties of Cu-ZSM-5 and Cu-S-1 catalysts

Synthesis and characterization of porous glycidylmethacrylate–divinylbenzene monoliths using the high internal phase emulsion approach

Bulk and surface structures of V2O5/ZrO2 catalysts for n-butane oxidative dehydrogenation

Morphological and textural characterization of vanadium oxide supported on zirconia by ionic exchange

NO and N2O decomposition and their reduction by hydrocarbons over Fe–Zn manganite spinels

H2 reduction behavior and NO/N2O abatement catalytic activity of manganese based spinels doped with copper, cobalt and iron ions

Assessment of Inorganic Fibre Burden in Biological Samples by Scanning Electron Microscopy – Energy Dispersive Spectroscopy

Dimeric Cu(I) species in Cu-ZSM-5 catalysts: the active sites for the NO decomposition

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