2017年12月1日
A biphasic sol–gel route to synthesize anatase TiO2 particles under controlled conditions and their DSSC application
Journal of Asian Ceramic Societies
- ,
- ,
- 巻
- 5
- 号
- 4
- 開始ページ
- 427
- 終了ページ
- 435
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jascer.2017.09.005
- 出版者・発行元
- Elsevier B.V.
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.
- ID情報
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- DOI : 10.1016/j.jascer.2017.09.005
- ISSN : 2187-0764
- SCOPUS ID : 85030472337