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	Preparation of the size-controlled TiO/sub 2/ with spherical morphology
	Hu Mei-Long ; Bai Chen-Guang ; Xu Sheng-Ming ; Xu Gang ; Liang Dong
	2010-10-12 ; 2010-10-12
关键词	Experimental/ calcination differential scanning calorimetry materials preparation nucleation organic compounds particle size scanning electron microscopy solid-state phase transformations surfactants titanium compounds water X-ray diffraction/ spherical morphology spherical titania hydrolysis solvent 1-propanol deionized water titanium sulfate surfactant polyvinylpyrrolidone PVP TG-DSC SEM XRD particle size distribution phase transformation calcination LaMer model nucleation temperature 70 C to 90 C TiO/sub 2// A8120 Other methods of preparation of materials A8140G Other heat and thermomechanical treatments A8270 Disperse systems A6810 Fluid surfaces and interfaces with fluids A6470K Solid-solid transitions/ temperature 3.4315E+02 to 3.6315E+02 K/ TiO2/bin O2/bin Ti/bin O/bin
中文摘要	Spherical Titania (TiO/sub 2/) 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(SO/sub 4/)/sub 2/). Parameters like surfactant, precursor concentration, calcination temperature, and calcination time were investigated. The results showed that high quality TiO/sub 2/ 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 t. 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 TiO/sub 2/ was mainly determined by calcination temperature and time. And a LaMer model was introduced to explain the nucleation and growth of the TiO/sub 2/ particles.
语种	中文
出版者	Editorial Board of Acta Physico-Chimica Sinica ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79372]
专题	清华大学
推荐引用方式 GB/T 7714	Hu Mei-Long,Bai Chen-Guang,Xu Sheng-Ming,et al. Preparation of the size-controlled TiO/sub 2/ with spherical morphology[J],2010, 2010.
APA	Hu Mei-Long,Bai Chen-Guang,Xu Sheng-Ming,Xu Gang,&Liang Dong.(2010).Preparation of the size-controlled TiO/sub 2/ with spherical morphology..
MLA	Hu Mei-Long,et al."Preparation of the size-controlled TiO/sub 2/ with spherical morphology".(2010).

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