Synthesis of mesoporous TiO2 spheres and aggregates by sol-gel method for dye-sensitized solar cells

Hui Tong; Naoya Enomoto; Miki Inada; Yumi Tanaka; Junichi Hojo

doi:10.1016/j.matlet.2014.11.080

Synthesis of mesoporous TiO₂ spheres and aggregates by sol-gel method for dye-sensitized solar cells

Hui Tong, Naoya Enomoto, Miki Inada, Yumi Tanaka, Junichi Hojo

Applied Chemistry

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Mesoporous microspheres of anatase TiO₂ were synthesized by hydrolysis of titanium butoxide in butanol. The TiO₂ micospheres were about 0.5 μm in size, composed of primary nanoparticles of about 10 nm, and the specific surface area increased by addition of triblock copolymer (Pluronic F127). TiO₂ aggregates with irregular shape were formed by hydrothermal treatment. Before and after calcination, the crystallinity of TiO₂ aggregates was high although the specific surface area decreased. The cell efficiency of TiO₂ sphere electrode increased by F127 addition. Furthermore, TiO₂ aggregate electrode exhibited an efficiency of 5.6%, which was much higher than those of TiO₂ spheres with F127 and commercial TiO₂ nanoparticles (P25) electrodes. It was confirmed that the high crystallinity of TiO₂ was important to improve the photovoltaic properties as well as large surface area.

Original language	English
Pages (from-to)	259-262
Number of pages	4
Journal	Materials Letters
Volume	141
DOIs	https://doi.org/10.1016/j.matlet.2014.11.080
Publication status	Published - Feb 15 2015

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.matlet.2014.11.080

Cite this

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title = "Synthesis of mesoporous TiO2 spheres and aggregates by sol-gel method for dye-sensitized solar cells",

abstract = "Mesoporous microspheres of anatase TiO2 were synthesized by hydrolysis of titanium butoxide in butanol. The TiO2 micospheres were about 0.5 μm in size, composed of primary nanoparticles of about 10 nm, and the specific surface area increased by addition of triblock copolymer (Pluronic F127). TiO2 aggregates with irregular shape were formed by hydrothermal treatment. Before and after calcination, the crystallinity of TiO2 aggregates was high although the specific surface area decreased. The cell efficiency of TiO2 sphere electrode increased by F127 addition. Furthermore, TiO2 aggregate electrode exhibited an efficiency of 5.6%, which was much higher than those of TiO2 spheres with F127 and commercial TiO2 nanoparticles (P25) electrodes. It was confirmed that the high crystallinity of TiO2 was important to improve the photovoltaic properties as well as large surface area.",

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T1 - Synthesis of mesoporous TiO2 spheres and aggregates by sol-gel method for dye-sensitized solar cells

AU - Tong, Hui

AU - Enomoto, Naoya

AU - Inada, Miki

AU - Tanaka, Yumi

AU - Hojo, Junichi

PY - 2015/2/15

Y1 - 2015/2/15

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AB - Mesoporous microspheres of anatase TiO2 were synthesized by hydrolysis of titanium butoxide in butanol. The TiO2 micospheres were about 0.5 μm in size, composed of primary nanoparticles of about 10 nm, and the specific surface area increased by addition of triblock copolymer (Pluronic F127). TiO2 aggregates with irregular shape were formed by hydrothermal treatment. Before and after calcination, the crystallinity of TiO2 aggregates was high although the specific surface area decreased. The cell efficiency of TiO2 sphere electrode increased by F127 addition. Furthermore, TiO2 aggregate electrode exhibited an efficiency of 5.6%, which was much higher than those of TiO2 spheres with F127 and commercial TiO2 nanoparticles (P25) electrodes. It was confirmed that the high crystallinity of TiO2 was important to improve the photovoltaic properties as well as large surface area.

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