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Citation: HU Mei-Long, BAI Chen-Guang, XU Sheng-Ming, XU Gang, LIANG Dong. Preparation of the Size-Controlled TiO₂ with Spherical Morphology[J]. Acta Physico-Chimica Sinica, ;2008, 24(12): 2287-2292. doi: 10.3866/PKU.WHXB20081223 shu

Preparation of the Size-Controlled TiO₂ with Spherical Morphology

1.
College of Material Science and Engineering, Chongqing University, Chongqing 400030, P. R. China; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China

Received Date: 9 July 2008
Available Online: 8 October 2008

Spherical Titania (TiO2) with narrow size distribution and nice dispersibility was obtained by hydrolysis in the mixed solvent of 1-propanol and de-ionized water from titanium sulfate (Ti(SO4)2). Parameters like surfactant, precursor concentration, calcination temperature, and calcination time were investigated. The results showed that high quality TiO2 could be synthesized using polyvinylpyrrolidone (PVP) as surfactant when the volume ratio of 1-propanol to de-ionized water was 1:1 at 70-90 ℃. And the optimal surfactant concentration had an important impact on the size distribution and dispersibility. The products were characterized by TG-DSC, SEM, and XRD. The results displayed that the size and size distribution of the particles were affected by the surfactant concentration and the precursor concentration. However, phase transformation of TiO2 was mainly determined by calcination temperature and time. And a LaMer model was introduced to explain the nucleation and growth of the TiO2 particles.
- Spherical TiO2,
- Size distribution,
- Dispersibility,
- Phase transformation,
- LaMer model
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Preparation of the Size-Controlled TiO₂ with Spherical Morphology