Buscar
Mostrando ítems 1-10 de 4147
Characterization of anodic growth and dissolution of antimony oxide films
(Elsevier Science Sa, 2009-07)
The anodic growth, morphology and stability of antimony oxide films grown in buffered phosphate electrolytes has been characterized by electrochemical methods, in situ ellipsometry and atomic force microscopy. The anodic ...
COD/DOC balanced models for the oxidation process of organic compounds
(Brazilian Society of Chemical Engineering, 2020-03)
Nowadays, several advanced oxidation and enzymatic processes are available for the removal of organic compounds. Mathematical models are crucial to optimize the operating conditions and to reduce the costs associated with ...
Oxidation of sodium alginate and characterization of the oxidized derivatives
(Elsevier, 2007-02-01)
Oxidation reactions on -OH groups at C-2 and C-3 positions of the uronic units of sodium alginate were performed with sodium periodate, and the influence of degree of oxidation on physical properties of the oxidized ...
Surface and interface interplay on the oxidizing temperature of iron oxide and Au-iron oxide core-shell nanoparticles
(Royal Society of Chemistry, 2016-07)
This article presents the effect of oxidation temperature on shape anisotropy, phase purity and growth of core-shell heterostructures and consequently their effect on structure-property relationships. Iron oxide and Au-iron ...
Efficient structured catalysts for ethylene production through the ODE reaction: Ni and Ni–Ce on ceramic foams
(Elsevier, 2013-10)
Ni and Ni-Ce oxides alumina-supported formulations onto alpha-alumina foams were prepared, characterized and evaluated in the oxidative dehydrogenation of ethane (ODE) reaction. The catalysts were appropriately deposited ...
A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
(Elsevier Science, 2007-01)
The present work describes the preparation of novel materials based on niobia (Nb2O5)/iron oxides and their use as catalyst on oxidizing reactions of organic compounds in aqueous medium with hydrogen peroxide. These new ...
Breakdown transients in high-k multilayered MOS stacks: Role of the oxide-oxide thermal boundary resistance
(American Institute of Physics, 2020-07)
In this work, breakdown transients of multilayered gate oxide stacks were analyzed to study the impact of the interfaces between oxides on the heat dissipation considering an electromigration-based progressive breakdown ...
CeO/CuOx nanostructured films for CO oxidation and CO oxidation in hydrogen-rich streams using a micro-structured reactor
(Springer/Plenum Publishers, 2019-05)
The CO oxidation reaction has a strong implication in environmental catalysis; besides a promising performance of CeO2/CuOx systems in inverse coniguration has been demonstrated, in which ceria is deposited in larger copper ...
Electrospinning synthesis and characterization of nanofibers of Co, Ce and mixed Co-Ce oxides. Their application to oxidation reactions of diesel soot and CO
(Elsevier Science, 2020-12)
Co, Ce and Co-Ce nanofibers were synthesized by the electrospinning method. To obtain mixed fibers, Co was incorporated in two ways: one step synthesis and sequential synthesis. Nanofibers were applied to two reactions: ...
New trends in organic synthesis with oxidative enzymes
(Bentham Science Publishers, 2012-08)
Oxidative enzymes constitute privileged catalysts in organic synthesis. Environmentally benign reaction conditions along with high selectivity are the most appealing characteristic shown by these biocatalysts in contrast ...