Hydrothermal synthesis of mesoporous TiO2-SiO2 core-shell composites for dye-sensitized solar cells

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

doi:10.1016/j.electacta.2014.03.032

Hydrothermal synthesis of mesoporous TiO₂-SiO₂ core-shell composites 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

14 Citations (Scopus)

Abstract

It is challenging to utilize TiO₂-based composites with high specific surface area to improve dye-sensitized solar cells (DSSCs) performance. Herein, we report efficient TiO₂-SiO₂ core-shell composites for DSSCs by optimizing the microstructure and crystalline structure. Mesoporous TiO₂-SiO₂ core-shell composites were synthesized by hydrolysis of TiOCl₂ and Si(C₂H ₅O)₄ under hydrothermal condition. The shell thickness can be tuned through adjustment of the SiO₂ addition content. Rutile phase of TiO₂ formed without SiO₂ addition, while anatase phase of TiO₂ was stabilized by SiO₂ loading. By addition of SiO₂, the crystallite size decreased from 29 nm of rutile to 15 nm of anatase, and the specific surface area increased from 23 m²/g to 150 m²/g. The best transfer efficiency (5.9%) was obtained in TiO₂-SiO₂(0.10), which is much higher than that of commercial TiO₂ powder (P25).

Original language	English
Pages (from-to)	329-334
Number of pages	6
Journal	Electrochimica Acta
Volume	130
DOIs	https://doi.org/10.1016/j.electacta.2014.03.032
Publication status	Published - Jun 1 2014

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Electrochemistry

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title = "Hydrothermal synthesis of mesoporous TiO2-SiO2 core-shell composites for dye-sensitized solar cells",

abstract = "It is challenging to utilize TiO2-based composites with high specific surface area to improve dye-sensitized solar cells (DSSCs) performance. Herein, we report efficient TiO2-SiO2 core-shell composites for DSSCs by optimizing the microstructure and crystalline structure. Mesoporous TiO2-SiO2 core-shell composites were synthesized by hydrolysis of TiOCl2 and Si(C2H 5O)4 under hydrothermal condition. The shell thickness can be tuned through adjustment of the SiO2 addition content. Rutile phase of TiO2 formed without SiO2 addition, while anatase phase of TiO2 was stabilized by SiO2 loading. By addition of SiO2, the crystallite size decreased from 29 nm of rutile to 15 nm of anatase, and the specific surface area increased from 23 m2/g to 150 m2/g. The best transfer efficiency (5.9%) was obtained in TiO2-SiO2(0.10), which is much higher than that of commercial TiO2 powder (P25).",

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AU - Tong, Hui

AU - Enomoto, Naoya

AU - Inada, Miki

AU - Tanaka, Yumi

AU - Hojo, Junichi

PY - 2014/6/1

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N2 - It is challenging to utilize TiO2-based composites with high specific surface area to improve dye-sensitized solar cells (DSSCs) performance. Herein, we report efficient TiO2-SiO2 core-shell composites for DSSCs by optimizing the microstructure and crystalline structure. Mesoporous TiO2-SiO2 core-shell composites were synthesized by hydrolysis of TiOCl2 and Si(C2H 5O)4 under hydrothermal condition. The shell thickness can be tuned through adjustment of the SiO2 addition content. Rutile phase of TiO2 formed without SiO2 addition, while anatase phase of TiO2 was stabilized by SiO2 loading. By addition of SiO2, the crystallite size decreased from 29 nm of rutile to 15 nm of anatase, and the specific surface area increased from 23 m2/g to 150 m2/g. The best transfer efficiency (5.9%) was obtained in TiO2-SiO2(0.10), which is much higher than that of commercial TiO2 powder (P25).

AB - It is challenging to utilize TiO2-based composites with high specific surface area to improve dye-sensitized solar cells (DSSCs) performance. Herein, we report efficient TiO2-SiO2 core-shell composites for DSSCs by optimizing the microstructure and crystalline structure. Mesoporous TiO2-SiO2 core-shell composites were synthesized by hydrolysis of TiOCl2 and Si(C2H 5O)4 under hydrothermal condition. The shell thickness can be tuned through adjustment of the SiO2 addition content. Rutile phase of TiO2 formed without SiO2 addition, while anatase phase of TiO2 was stabilized by SiO2 loading. By addition of SiO2, the crystallite size decreased from 29 nm of rutile to 15 nm of anatase, and the specific surface area increased from 23 m2/g to 150 m2/g. The best transfer efficiency (5.9%) was obtained in TiO2-SiO2(0.10), which is much higher than that of commercial TiO2 powder (P25).

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