کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7897544 1510118 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A biphasic sol-gel route to synthesize anatase TiO2 particles under controlled conditions and their DSSC application
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
A biphasic sol-gel route to synthesize anatase TiO2 particles under controlled conditions and their DSSC application
چکیده انگلیسی
A biphasic sol-gel method was introduced to reduce a high hydrolysis rate of metal alkoxides and control a morphological evolution of metal oxides. Titanium tetraisopropoxide (TTIP) was dissolved in an organic solvent which was immiscible with water. The TTIP solution was then contacted with water or pH-controlled aqueous solutions to promote the hydrolysis and the polycondensation reaction through the mass transfer across the organic/aqueous interface. Anatase TiO2 was formed in any conditions employed in the present work at reaction temperatures of 80 °C or below. The morphology of TiO2 particles obtained was largely dependent on the kind of organic solvents. It was basically the aggregation of nanoparticles to give submicrometer-sized secondary particles with or without a regular shape. Heptane was found to be suitable to obtain spherical TiO2 large particles, which were evaluated as a photoanode material in dye-sensitized solar cells. Actually the large TiO2 particles worked well as the light scattering layer when applying them to a double-layered phtoanode, which showed an energy conversion efficiency of 5.67% with a high short-circuit photocurrent density of 14.1 mA cm−2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asian Ceramic Societies - Volume 5, Issue 4, December 2017, Pages 427-435
نویسندگان
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