کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
26172 43937 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sol–gel and low-temperature solvothermal synthesis of photoactive nano-titanium dioxide
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Sol–gel and low-temperature solvothermal synthesis of photoactive nano-titanium dioxide
چکیده انگلیسی

Photoactive nano-titanium dioxide, as anatase phase, was obtained by the sol–gel method coupled with the solvothermal technique at short crystallization time (2 h) and low temperature (200 °C), using tetraisopropyl orthotitanate as Ti-precursor and 2-propanol as solvent. Precursor ratios were evaluated to determine their influence in the synthesis. Methyl orange was used as model molecule for the photocatalytic degradation. Highest anatase crystallinity was obtained when the water content is close to the stoichiometrically needed to hydrolyze a molecule of TIOT and these materials also showed the highest methyl orange photodegradation.

SEM micrographs of the synthesized TiO2 using the sol–gel method and the solvothermal technique.Figure optionsDownload as PowerPoint slideHighlights
► Nano-titanium dioxide was obtained by the sol–gel and the solvothermal methods.
► When the water is close to the stoichiometrical to TIOT hydrolyze leads to anatase.
► High anatase crystallinity is a crucial feature to photocatalytic activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 251, 1 January 2013, Pages 175–181
نویسندگان
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