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Monodisperse spherical mesoporous TiO 2 particles with controlled sizes are synthesized with a simple sol–gel approach from a mixture of poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) triblock copolymer, titanium isopropoxide, and 2,4-pentanedione in aqueous solution. We find that a low concentration of surfactant dissolved in the aqueous solution results in the synthesis...
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