Tin Dioxide
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. Rare earth-doped nanostructured tin dioxide for catalytic and gas sensor applications. / Dióxido de estanho nanoestruturado dopado com terras raras como catalisador e sensor de gases.
This work presents and discusses results of the effects of doping on rare earth-doped nanosize SnO2, obtained using the polymeric precursor method and prepared at different annealing temperatures. Only the cassiterite phase was observed for the rare earth-doped SnO2. Structural and morphological studies in pure and rare earthdoped tin dioxide were performed
Publicado em: 2004
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14. Passion fruit juice stability conditioned in steel packings with different organic coverings. / Estabilidade de suco de maracuja acondicionado em embalagens de aço com diferentes revestimentos organicos.
The purpose of this study was to evaluate different specifications of welded three piece tinplate cans with respect to the internal body passion fruit juice. The evaluation was by a storage test, evaluating the performance relative to food/packaging interaction. Three systems of internal organic coatings of the cans were analyzed. The first was composed of a
Publicado em: 2004
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15. Dióxido de estanho nanoestruturado: síntese e crescimento de nanocristais e nanofitas
The objectives of this work are to supply a basic background on nanostructured materials and also to report about the obtaining of nanoparticles, mainly, tin dioxide nanocrystalline particles (obtained by using the polymeric precursor method) presenting a high stability against particle growth due to the usage of a metastable solid solution. The synthesis an
Química Nova. Publicado em: 2003-12
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16. Dióxido de titânio sol-gel: propriedades e comportamento eletrocrômico
Titanium dioxide was prepared by hydrolysis and polycondensation of titanium tetraisopropoxide. TiO2 films were obtained by spin coating of the precursor solution on ITO substractes (glass covered with indium doped tin oxide). Films were prepared using different temperatures and hydrochloric acid contents. The effect of the drying temperature of the films (1
Química Nova. Publicado em: 2000-12
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17. The electrochemical behavior of tin dioxide based electrodes and electrochemical decomposition of cyanides / Comportamento eletroquímico de eletrodos a base de dióxido de estanho e sua aplicação na oxidação do cianeto
Tin dioxide based electrodes have a high overpotential for the OER and are relatively cheap. Due to these characteristics, they have a potential application is waste water treatment as anodes for electrochemical destruction of organics and inorganics. However, the service life of such electrodes are relatively short due to corrosion of the oxide layer during
Publicado em: 1997
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18. Anaerobic Biodegradation of Indole to Methane
Methane gas was produced from a laboratory, granular activated carbon, anaerobic filter treating a synthetically prepared mixture of polycyclic N-aromatic compounds. The biodegradability of the individual polycyclic N-aromatic compound present in the mixture was investigated. Experimental results obtained from test bottles containing methanogenic enrichment
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19. Effect of trace metals on growth of Streptococcus mutans in a teflon chemostat.
Correlations between the presence of certain trace metals in dental enamel or in drinking water and the incidence of human dental caries have been demonstrated; therefore, the effects of several trace metals on growth of the cariogenic organism Streptococcus mutans OMZ176 were determined. For continuous growth in a chemically defined medium (treated with Che