Hydrothermal Treatment
Mostrando 13-24 de 54 artigos, teses e dissertações.
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13. OBTAINING ZnO IMMOBILIZED OVER DIFFERENT SUBSTRATES BY HYDROTHERMAL TREATMENT FOR PHOTOCATALYSIS APPLICATION
The aim of this work is to systematically explore the effect of the synthesis conditions of ZnO structures, immobilized on different substrates by hydrothermal treatment, in its photocatalytic activity. A circumscribed central composite design of experiments was used to analyze the effects of reagents stoichiometry, reaction time and temperature, covering a
Quím. Nova. Publicado em: 2016-04
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14. Layered Zinc Hydroxide Salts Intercalated with Anionic Surfactants and Adsolubilized with UV Absorbing Organic Molecules
Two anionic surfactants, dodecylsulfate (DDS) and dodecylbenzenesulfonate (DBS), were intercalated into layered zinc hydroxide salts (LHS) using the direct alkaline co-precipitation method, and characterized by powder X-ray diffraction (PXRD), Fourier-transform infrared (FTIR) and thermogravimetric analysis/differential thermal analysis (TGA/DTA). Different
J. Braz. Chem. Soc.. Publicado em: 2015-09
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15. Microwave-assisted hydrothermal synthesis of magnetite nanoparticles with potential use as anode in lithium ion batteries
Rechargeable solid-state batteries have long been considered an attractive power source for a wide variety of applications, and in particular, lithium-ion batteries are emerging as the technology of choice for portable electronics. One of the main challenges in the design of these batteries is to ensure that the electrodes maintain their integrity over many
Mat. Res.. Publicado em: 09/09/2014
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16. Synthesis of Co-Al-Cl LDH by cathodic material reprocessing from cellular phone batteries
The aim of this paper was the recovering of the cathodic material from discarded lithium ion batteries for obtainment of the lamellar double hydroxides (LDHs) by the co-precipitation method at variable pH in HCl and H2O2 1:1 (v/v) acid solution containing Co and Al (extracted from cathodic material composed of LiCoO2 and aluminum foil). These metals were pre
Mat. Res.. Publicado em: 29/04/2014
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17. Synthesis of high value-added zeolitic materials using glass powder residue as a silica source
In this work, zeolite A was obtained using alkaline fusion followed by a hydrothermal treatment of glass powder residue derived from the manufacturing of glass. The following parameters were evaluated: leaching of the stock material (silica source), mineralizing agent, alumina source, and the alkaline fusion and crystallization temperatures. The synthesized
Mat. Res.. Publicado em: 26/11/2013
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18. FTIR study of the relation, between extra-framework aluminum species and the adsorbed molecular water, and its effect on the acidity in ZSM-5 steamed zeolite
The infrared spectroscopy study of zeolite samples, obtained by steam treatment at 560‑960 °C of the ZSM‑5 catalyst (framework Si/Al ratio of 13), suggests an association between adsorbed molecular water and extra‑framework aluminum hydroxyls generated after treatment. Moreover, infrared spectroscopy of adsorbed pyridine shows the reduction of the den
Mat. Res.. Publicado em: 26/03/2013
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19. Efeito da radiação gama e de tratamentos hidrotérmicos sobre as características físico-quimicas, funcionais e nutricionais da farinha e do amido de banana verde (Musa acuminata cv. Nanica) / Effect of gamma radiation and hydrothermal treatments on the physicochemical, functional and nutritional characteristics of flour and starch from green bananas (Musa acuminata cv. Nanica)
The aim of this study was to evaluate the effect of gamma radiation and gamma radiation followed by hydrothermal treatments on the physicochemical, functional and nutritional (digestibility) characteristics of flour and starch from green bananas. Green bananas Musa acuminata (AAA Cavendish) were processed in order to obtain flour and extract starch. The flou
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/10/2011
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20. AvaliaÃÃo do tratamento hidrotÃrmico, combinado ao cÃlcio e ao Ãcido giberÃlico, na resposta do tomate ao âchillingâ / Evaluation of hydrothermal treatment, combined with calcium and gibberellic acid, in tomato response to the "chilling"
O tomate (Lycopersicon esculentum Mill) està sujeito a danos causados pelo frio (âchillingâ) durante o armazenamento refrigerado. A aplicaÃÃo, em pÃs-colheita, de cÃlcio e reguladores vegetais, bem como do uso de tratamento hidrotÃrmico, pode contribuir para reduzir vÃrios tipos de desordens fisiolÃgicas nos frutos. Neste trabalho, verificou-se a i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011
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21. Duration of hydrothermal treatment and peeling of 'Murcott' tangor
Hydrothermal treatment facilitates the peeling of 'Pera' sweet orange fruit and does not alter its quality. The aim of this work was to adapt the technology of peeling for the use of hydrothermal treatment in 'Murcott' tangor and to evaluate its influence in the CO2 production and the physicochemical, microbiologic and sensorial characteristics of fruits. Th
Scientia Agricola. Publicado em: 2011-12
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22. Development and characterization of a novel bioresorbable and bioactive biomaterial based on polyvinyl acetate, calcium carbonate and coralline hydroxyapatite
Coralina® HAP-200 (coralline hydroxyapatite obtained by hydrothermal treatment of marine corals) and POVIAC® (polymeric matrix based on PVAc), commercial trade marks were mixed with a natural product from the Cuban sea costs, i.e. calcium carbonate from Porites Porites coral, to obtain a novel bioactive composite with potential use as bone restoration mate
Materials Research. Publicado em: 18/03/2011
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23. Oclusão de pares iônicos em espaços interlamelares como ferramenta para formação de híbridos luminescentes baseados em V IND. 2 O IND. 5 e MoO IND. 3 / Interlayer occlusion of ion pairs as tool for the production of V2O5 and MoO3-based luminescent materials
In the first part of this work, novel hybrid materials were developed by insertion of poly(diallymethylammonium chloride) PDDA and poly(allylamine hydrochloride) PAH polyelectrolytes into V2O5 and MoO3 interlayer spaces using hydrothermal treatment. A systematic study of the synthesis of hybrids materials by direct in situ reaction of PDDA and PAH polycation
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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24. The effect of dydrophobic modification of zelites on CO2 absorption in different solvents
The hydrophobicity of zeolite was achieved by a method of hydrothermal synthesis combined with acid treatment for the enhancement of CO2 absorption. The influence of zeolite before and after modification on the absorption of CO2 in three kinds of solvents (water, cyclohexane and soy bean oil) was investigated and many different effects were observed. In aque
Brazilian Journal of Chemical Engineering. Publicado em: 2010-06