A biphasic sol-gel route to synthesize anatase TiO2 particles under controlled conditions and their DSSC application

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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 14.1mAcm-2.

Original languageEnglish
JournalJournal of Asian Ceramic Societies
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

Titanium dioxide
Organic solvents
Particles (particulate matter)
Sol-gels
Hydrolysis
Titanium
Metals
Heptanes
Water
Heptane
Polycondensation
Photocurrents
Energy conversion
Short circuit currents
Light scattering
Oxides
Sol-gel process
Conversion efficiency
Mass transfer
Agglomeration

Keywords

  • Dye-sensitized solar cells
  • Sol-gel method
  • Titanium dioxide
  • Titanium tetraisopropoxide

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

@article{a606ad5691f54ce2bdcef1e67b5708f3,
title = "A biphasic sol-gel route to synthesize anatase TiO2 particles under controlled conditions and their DSSC application",
abstract = "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 14.1mAcm-2.",
keywords = "Dye-sensitized solar cells, Sol-gel method, Titanium dioxide, Titanium tetraisopropoxide",
author = "Tohru Narabe and Manabu Hagiwara and Shinobu Fujihara",
year = "2017",
doi = "10.1016/j.jascer.2017.09.005",
language = "English",
journal = "Journal of Asian Ceramic Societies",
issn = "2187-0764",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - A biphasic sol-gel route to synthesize anatase TiO2 particles under controlled conditions and their DSSC application

AU - Narabe, Tohru

AU - Hagiwara, Manabu

AU - Fujihara, Shinobu

PY - 2017

Y1 - 2017

N2 - 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 14.1mAcm-2.

AB - 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 14.1mAcm-2.

KW - Dye-sensitized solar cells

KW - Sol-gel method

KW - Titanium dioxide

KW - Titanium tetraisopropoxide

UR - http://www.scopus.com/inward/record.url?scp=85030472337&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85030472337&partnerID=8YFLogxK

U2 - 10.1016/j.jascer.2017.09.005

DO - 10.1016/j.jascer.2017.09.005

M3 - Article

AN - SCOPUS:85030472337

JO - Journal of Asian Ceramic Societies

JF - Journal of Asian Ceramic Societies

SN - 2187-0764

ER -