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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Impact of growth kinetics on morphology and pore structure of TiO2-one-pot synthesis of macroporous TiO2 microspheres.

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(2)O was supplied by an esterification reaction between acetic acid and 2-propanol (denoted as H(2)Oe), and/or by intentionally adding it (denoted as H(2)Oa). It was found that the quantity of H(2)Oa plays a crucial role in the morphology and porous structure of the final TiO(2) product. Without the addition of H(2)Oa, 1D and porous TiO(2) was synthesized. With the addition of H(2)Oa, and when the H(2)Oa: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(2)Oa: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.[1]

References

  1. Impact of growth kinetics on morphology and pore structure of TiO2-one-pot synthesis of macroporous TiO2 microspheres. Zhong, Z., Chen, F., Ang, T.P., Han, Y., Lim, W., Gedanken, A. Inorganic chemistry. (2006) [Pubmed]
 
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