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Effects of hydrothermal temperature and acid concentration on the transition from titanate to titania

Title
Effects of hydrothermal temperature and acid concentration on the transition from titanate to titania
Authors
Kim, SoonhyunKim, MinsunHwang, Sung-HoLim, Sang Kyoo
DGIST Authors
Kim, SoonhyunHwang, Sung-HoLim, Sang Kyoo
Issue Date
2012-05-25
Citation
Journal of Industrial and Engineering Chemistry, 18(3), 1141-1148
Type
Article
Article Type
Article
Keywords
Acid ConcentrationsAcid TreatedAnatase ParticlesCrystalline PhaseHigh ConcentrationHigh CrystallinityHydrothermalHydrothermal ProcessingHydrothermal TemperatureLow ConcentrationsNano-StructuredNano-StructuresNanofibersNanostructureOxide MineralsPhase TransformationPhase TransitionsPhoto-CatalyticPhoto-Catalytic ActivitiesPhotocatalysisTitanate NanofiberTitanate NanotubesTitanatesTitaniaTitanium Dioxide
ISSN
1226-086X
Abstract
Nanostructured titanates were prepared by alkaline hydrothermal processing. The titanates were transformed to the anatase particles at low concentrations of acid, whereas the rutile rods were produced from the titanates at high concentrations of acid. These changes were more retarded in the titanate nanofiber product than in titanate nanotubes product, which could be attributed to the stability and high crystallinity of the titanate nanofiber product prepared at a high hydrothermal temperature. The photocatalytic activities of the acid treated nanostructured titanates for MB degradation and gaseous CH 3CHO oxidation were strongly dependent on the presence of the anatase crystalline phase. © 2012 The Korean Society of Industrial and Engineering Chemistry.
URI
http://hdl.handle.net/20.500.11750/5360
DOI
10.1016/j.jiec.2012.01.015
Publisher
Elsevier
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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