Synthesis of TiO2 Nanoparticles Using Hydrogel as Template and TiO2 Microspheres Using Microfluidic

doi:10.15541/jim20140590

Abstract

Abstract:

Poly (acrylamide-co-acrylic acid) and polyethylene glycol/polyacrylic acid as templates and acrylic acid as an inhibitor were used to prepare TiO₂ nanoparticles. Hydrogel with low speed of absorption and network structure suppressed the speed of hydrolysis of tetrabutyl titanate and growth rate of TiO₂ nanoparticles. The as-prepared titanium dioxide nanoparticles have anatase phase structure with a narrow size distribution. As compared with poly (acrylamide-co-acrylic acid), polyethylene glycol/polyacrylic acid has lower expansion rate of water-absorption and higher stability of precursor solution. Using microfluidic process, precursor solution of polyethylene glycol/polyacrylic acid is chosen to prepare TiO₂ microspheres. These as-prepared TiO₂ microspheres have a uniform size distrubition and good sphericity, which crystal structure is anatase phase after calcination.

Key words: hydrogel, hydrolysis, titanium dioxide, microfluidic

CLC Number:

TQ133

DING Xue-Qiang, ZHANG Cheng, DONG Li-Min, WANG Chen, LIANG Tong-Xiang. Synthesis of TiO₂ Nanoparticles Using Hydrogel as Template and TiO₂ Microspheres Using Microfluidic[J]. Journal of Inorganic Materials, 2015, 30(6): 605-609.

Figures/Tables 7

Fig. 1 Schematic of the microfluidic device

Fig. 2 IR spectra of poly(acrylamide-co-acrylic acid) (a) and polyethylene glycol/polyacrylic acid (b)

Fig. 3 TG-DSC curves of poly (acrylamide-co-acrylic acid) (a) and polyethylene glycol/polyacrylic acid (b)

Fig. 4 XRD patterns of TiO2 prepared by poly (acrylamide-co- acrylic acid) (a) and polyethylene glycol/polyacrylic acid (b)

Fig. 5 Swelling ratio curves of two kinds of hydrogel (a) Poly (acrylamide-co-acrylic acid); (b) Polyethylene glycol/polyacrylic acid

Fig. 6 Formation process of microspheres

Fig. 7 Microspheres morphologies of TiO2 microspheres before (a) and after (b) calcinations

References 20

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Synthesis of TiO₂ Nanoparticles Using Hydrogel as Template and TiO₂ Microspheres Using Microfluidic

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