Search results for "titanium"

showing 8 items of 878 documents

The influence of the catalyst on the photacatalytic synthesis of vanillin

2014

titanium dioxide vanillin photocatalytic synthesisSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie
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Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction

2022

In the current research, the productivity of CO2 photoreduction has been boosted by performing the reaction in an innovative photocatalytic reactor, which allows for operation up to 20 bar. A set of photocatalysts were used, including three types of pristine TiO2, i.e., one commercially prepared (Evonik P25), one home-prepared by flame spray pyrolysis (FSP), and one obtained by the hydrolysis of TiCl4 (TiO2exCl), a bare thermo-exfoliated carbon nitride (C3N4-TE), and binary materials composed of TiO2 and C3N4-TE. The photoreduction was carried out in water at pH 14 and in the presence of Na2SO3 as a hole scavenger. Hydrogen and very small amounts of CO were detected in the head space of the…

titanium dioxidesolar fuelsSettore ING-IND/25 - Impianti ChimiciCatalysiscarbon capture and conversionCO<sub>2</sub> photoreduction; carbon capture and conversion; photocatalysis; pressurized photoreactor; titanium dioxide; carbon nitride; solar fuelsCO2 photoreductionCO2 photoreduction; carbon capture and conversion; photocatalysis; pressurized photoreactor; titanium dioxide; carbon nitride; solar fuelsSettore CHIM/07 - Fondamenti Chimici Delle TecnologiePhysical and Theoretical Chemistrypressurized photoreactorcarbon nitridephotocatalysisGeneral Environmental Science
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Photolytic and TiO2-Assisted Photodegradation of Aqueous Solutions of Tetracycline

2004

Aqueous solutions of tetracycline were UV-irradiated in homogeneous and heterogeneous systems. Tetracycline disappeared in both systems, but the presence of TiO2 accelerated the photodegradation of the antibiotic in comparison with direct photolysis. The rate of decomposition was dependent on the concentration of tetracycline and its degradation on the surface of TiO2 can be described by means of a pseudo-first order kinetics. Photolysis involved only the photodeamination of tetracycline and a partial mineralization. Unlikely, the treatment with TiO2 and UV-light resulted in a complete mineralization of the antibiotic drug.

titanium dioxidetetracycline photodegradationphotolysiheterogeneous photocatalysi
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The Ti-influence on the tourmaline color

2008

Titanium was examined in different black tourmalines by spectrophotometric analyses in the region between 12500 and 27000 cm-1 (800-370 nm) using a microscope spectrophotometer MPV-5P, Leitz (Germany), and chemically analyzed on an electron microprobe Camebax Microbeam, Cameca (France) in WDS Mode. Fourteen tourmaline samples with their face oriented parallel to the principal axis, cut and polished down to thin sections, showed polarized spectra of two broad absorption bands at approximately 14000 cm-1 (715 nm) and 24000 cm-1 (417 nm). Precision thickness measurements were used to calculate the absorption coefficients α. For the absorption around 24000 cm-1, a linear correlation was observe…

tourmalineMicroscopeTourmalineChemistryAnalytical chemistrychemistry.chemical_elementGeneral ChemistryElectron microprobeMicrobeamIntervalence charge transferSpectral linelaw.inventionlawIVCT effecttitaniumAbsorption (electromagnetic radiation)Titanium
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TRANSITION METAL OXIDES AS SELECTIVE CONTACTS FOR C-SI SOLAR CELLS

2021

transition metal oxides solar cell c-Si defects small polaron molybdenum oxide titanium oxide efficiency photovoltaicSettore ING-INF/01 - Elettronica
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CCDC 1438663: Experimental Crystal Structure Determination

2016

Related Article: David Van Craen, Markus Albrecht, Gerhard Raabe, Fangfang Pan, Kari Rissanen|2016|Chem.-Eur.J.|22|3255|doi:10.1002/chem.201600158

tri-lithium potassium bis(tris(3-(((hexa-24-dien-1-yl)oxy)carbonyl)benzene-12-diolato)-titanium) dihydrateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 2069786: Experimental Crystal Structure Determination

2021

Related Article: Christian Mevissen, David Sommer, Sabarina Vasanthakumar, Khai-Nghi Truong, Kari Rissanen, Markus Albrecht|2021|Dalton Trans.|50|9372|doi:10.1039/D1DT01707A

tri-lithium sodium tris(mu-33'-(118-dioxo-258111417-hexaoxaoctadecane-118-diyl)di[benzene-12-bis(olato)])-di-titanium(iv) NN-dimethylformamide solvate dihydrateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1523643: Experimental Crystal Structure Determination

2017

Related Article: Y.Y. Kim, J.M. Tanski|2017|Acta Crystallogr.,Sect.E:Cryst.Commun.|73|88|doi:10.1107/S2056989016020156

trichloro-(33'-di-t-butyl-55'66'-tetramethylbiphenyl-22'-diolato)-(tetrahydrofuran)-titanium(iv)Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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