Abstract
The sizes of mono-dispersed titania nanoparticles (TNPs) can be precisely controlled within a diameter range of 70–650 nm by varying the concentration of water and titania precursor. The water content of the acetone solvent is varied, and ethylene glycol (EG)-stabilized titanium butoxide is used as the titania precursor. Increasing the amount of water can reduce the sizes of TNPs through the formation of a large number of small seeds in the initial reaction state. To obtain small TNPs without any aggregation, Tween 20 is used as a surfactant. Synthesis of TNPs using solvents and chelating agents other than acetone and EG, respectively, is also investigated. For example, other solvents, such as 1,4-dioxane and tetrahydrofuran, and chelating agents, such as triethylene glycol and catechol, are used for the synthesis and size control of TNPs.
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Joohyun Lim and Jung Pyo have contributed equally.
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Lim, J., Pyo, J., Jung, D. et al. Preparation of mono-dispersed spherical titania nanoparticles with precise size control using ethylene glycol. J Sol-Gel Sci Technol 79, 89–97 (2016). https://doi.org/10.1007/s10971-016-4005-4
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DOI: https://doi.org/10.1007/s10971-016-4005-4