JOURNAL OF THE CHINESE CERAMIC SOCIETY. TiO 2 X

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1 Ni-YSZ Sm 0.5 Sr 0.5 Fe 0.8 Cu 0.2 O 3 δ 1215 JOURNAL OF THE CHINESE CERAMIC SOCIETY Vol. 40 No. 8 August 2012 TiO 2 ( ) TiO nm TiO 2 (PVP) TiO 2 X TiO 2 TiO 2 TiO nm 20 μm TiO 2 90 min 4 mg/l 72% TQ174 A (2012) :23:34 Photocatalytic Acticity of TiO 2 Nanofibres Prepared via Electrospinning Technology TENG Letian ZHAO Kang TANG Yufei (School of Materials Science and Engineering, Xi an University of Technology, Xi an , China) Abstract: TiO 2 nano-materials have a wide range of applications in the fields of photo-catalysis and antimicrobial. TiO 2 nanofibers were prepared via electrospinning and sintering technology, using TiO 2 nano-particles (20 30 nm) and the polyvinylpyrrolidone (PVP) by the electrospinning device. Comparatively, using the solution prepared by Ti(OC 4 H 9 ) 4 to obtain TiO 2 nanofibers for contrast and photocatalytic measurements on methylene blue trihydrate solution are performed. The samples were characterized by energy dispersive spectra, X-ray diffraction, scanning electron microscope and transmition electron microscope. The result shows that the TiO 2 nanofibers can be successfully prepared via an electrospinning technology, by using TiO 2 nano-particles, the diameters were nm, the length were more than 20 μm. The ratio of samples diameters were more even compared the TiO 2 nanofibers prepared by using Ti(OC 4 H 9 ) 4. The mehtylene blue solution, which concentration was 4 mg/l, was decomposed 72% by the samples with better photocatalytic efficiency after 90 minutes of UV irradiation. Key words: ceramic nanofiber; titanium oxide; electrospinning; nano-particles [1] ( ) [2 5] ZrO 2 ZnO TiO 2 [6 9] TiO (No ) (1985 ) (1963 ) Received date: Revised date: First author: TENG Letian (1985 ), male, Doctorial candidate. lay623@163.com Correspondent author: ZHAO Kang (1963 ), male, Ph.D., Professor.

2 [10 12] TiO 2 [13 15] TiO 2 (PVP) TiO 2 TiO TiO 2 1 TiO 2 TiO 2 EDS 1 Ti (34.66%) O (65.34%) Ti O 1: (PVP M w = ) TiO 2 ( nm) (CH 3 CH 2 OH ) (CH 3 COOH) [Ti(OC 4 H 9 ) 4 ] 4 g PVP 160 g PVP 4 g TiO 2 PVP TiO h TiO 2 /PVP 0.9 mm 1 ml/h 15 cm 20 kv TiO 2 /PVP h TiO 2 TiO 2 4 g PVP 160 g 20 g PVP TiO Axis Ultra X (EDS) TiO 2 XRD-7000 X (XRD) TiO 2 TiO 2 JSM-6700F (SEM) JEM-3010 (TEM) g 10 ml 0.4 mg/l 40 W ( nm) 664 nm 1 TiO 2 TiO 2 EDS Fig. 1 EDS spectrum of TiO 2 nanofibers with TiO 2 nano particles as Ti source 2 TiO 2 TiO 2 XRD TiO 2 / PVP 2θ 26.5 TiO 2 PVP TiO 2 TiO 2 TiO 2 TiO 2 TiO 2 XRD TiO 2 TiO 2 TiO TiO 2 3 TiO 2 TiO 2 TEM TiO nm TiO 2 PVP 550 TiO 2

3 TiO TiO 2 Fig. 3 TEM photograph of TiO 2 nanoparticles 2 XRD Fig. 2 XRD patterns of nanofibers 4 SEM TiO 2 4a TiO 2 /PVP nm TiO 2 PVP 20 μm 4b /PVP nm 20 μm /PVP 4 TiO 2 SEM Fig. 4 SEM photographs of TiO 2 composite nanofibers 5 TiO 2 TiO nm 208 nm ( 5c 5d ) > 20 μm 5a TiO 2 TiO 2

4 nm TiO 2 TiO 2 20 μm 5b TiO nm 20 μm TiO TiO mg/l 90 min 15 min 6 TiO 2 72% 6 Fig. 6 Relationship between UV photo degradation of methylene blue and time c 0 = 0.4 mg/l TiO 2 SEM Fig. 5 TEM and SEM photographs of TiO 2 nanofibers sintered at 550 1) TiO 2 TiO 2 2) TiO 2 TiO 2 TiO nm 20 μm 90 min 4 mg/l 72%

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