Impact of growth kinetics on morphology and pore structure of TiO 2 - One-pot synthesis of macroporous TiO 2 microspheres

Ziyi Zhong*, Fengxi Chen, Thiam Peng Ang, Yifan Han, Weiqiang Lim, Aharon Gedanken

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Titanium dioxide was synthesized by the hydrolysis of titanium tetraisopropoxide (TTIP) in the presence of acetic acid, 2-propanol, and organic amines (octylamine, aniline, and isobutylamine). H 2O was supplied by an esterification reaction between acetic acid and 2-propanol (denoted as H 2Oe), and/or by intentionally adding it (denoted as H 2Oa). It was found that the quantity of H 2Oa plays a crucial role in the morphology and porous structure of the final TiO 2 product. Without the addition of H 2Oa, 1D and porous TiO 2 was synthesized. With the addition of H 2Oa, and when the H 2Oa:TiO 2 molar ratio was in the range of 1:1 to 60:1, macroporous TiO 2 microspheres possessing a large surface area and high thermal stability were obtained. When the H 2Oa:TiO 2 molar ratio exceeded 60:1, porous TiO 2 with an irregular shape was formed. The variation in the morphology and porous structure is attributed to the manipulation of the growth kinetics by the addition of water.

Original languageEnglish
Pages (from-to)4619-4625
Number of pages7
JournalInorganic Chemistry
Volume45
Issue number12
DOIs
StatePublished - 12 Jun 2006
Externally publishedYes

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