TiO 2. Preparation of nano-la (S, C)-TiO 2 oriented films by hydrothermal-templating method. XU Ke-jing, XI Jin-tao

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1 Vol.20 No.2 The Chinese Journal of Nonferrous Metals Feb (2010) La(S,C)-TiO 2 ( ) La(S,C)-TiO 2 La S TiO 2 XRD BET EDS SEM h TiO 2 P ( Ti ) TiO m 2 /g 240 m 2 /g La S(C) TiO 2 3 h O643 A Preparation of nano-la (S, C)-TiO 2 oriented films by hydrothermal-templating method XU Ke-jing, XI Jin-tao (School of Materials Science and Engineering, Shandong University of Technology, Zibo , China) Abstract: The La(S,C)-TiO 2 oriented films were prepared on porous hadites by hydrothermal-templating method at low temperatures. The effects of the hydrothermal reaction temperature, addition of template agents, synergism effect of La/S codoping on the performances of nano-tio 2 films were studied. The performances of the films were characterized by XRD, UV-Vis BET, EDS and SEM. The results show that the TiO 2 film with anatase phase is obtained when the hydrothermal reaction temperature is 150 and the reacting time is 10 h. The oriented film is obtained when the molar ratio of template P123 to Ti is 0.03, and the specific surface area of particles in the film increases from 146 m 2 /g to 240 m 2 /g. The appropriate amount of La and S codoping greatly improves the photocatalytic activity of TiO 2 film, which fully decomposes methyl orange in water within 3 h. Key words: oriented film; templating agent; hydrothermal method; codoping; photocatalytic activity TiO 2 TiO 2 TiO 2 Fe Zn [1 2] Eu Ce Y [3 4] N S B [5 7] 4f (Y2008F50) xukj@sdut.edu.cn

2 20 2 La(S,C)-TiO TiO 2 N S F O TiO 2 O P O 2P TiO 2 TiO 2 [8 12] 60% 10% 50% 60% La(S,C)-TiO TiO 2 Ti(OH) 4 ( 15~20 mm) ( 30~50 mm) 1 100~ % 50% 55% 1.2 (Ti(OC 4 H 9 ) 4 ) TiO 2 (La(NO 3 ) 3 6H 2 O) La ((NH 2 )CS) S C (PEO 20 PPO 70 PEO 20 ) P ~160 [13] 10 h 0.010~0.035 [14] ( Ti ) [4, 14] La Ti Ti(OC 4 H 9 ) 4 ((NH 2 )CS) 1 3 XER UV-Vis 1.3 DNJ 79 BELSORP MAX D8 ADVANCE X TU 1901 Sirion 200 INCA Energy X Sirion ml 10 mg/l 4 h 300 W 15~20 cm 30 min [(C 0 C t )]/C 0 ] 100% C 0 C t C 0 C t La(S,C)-TiO 2 La(S,C)-TiO h XRD θ 25.3 (101) (004) 48.9 (200) (004) 48.9 (200) (004)(200) (004) (200)

3 P123 La(S,C)-TiO h La S 0.05% La( Ti ) Ti(OC 4 H 9 ) 4 ((NH 2 )CS) 1 3 P123 P123/Ti 0.010~ P m 2 /g P m 2 /g m 2 /g TiO 2 XRD Fig.1 XRD patterns of nano-tio 2 calcined at different hydrothermal temperatures XRD TiO La(S, C)-TiO 2 2 TiO 2 [4] TiO m 2 /g 17 m 2 /g TiO 2 SEM Fig.2 SEM image of nano-tio 2 film at hydrothermal temperature of P123 La/S-TiO 2 Fig.3 Influence of adding amount of P123 on specific surface area of TiO 2 4 P123 SEM 4 P123 P (e) P123 P123 [PEO-PPO-PEO] EO 20 PO 70 EO EO PO P123 EO O Ti Ti OH EO

4 20 2 La(S,C)-TiO P123 La/S-TiO 2 SEM Fig.4 SEM images of nano-tio 2 films with different adding amounts of P123: (a) 0.010; (b) 0.015; (c) 0.020; (d) 0.025; (e) 0.030; (f) Ti OH P123 TiO 2 [15] 5 5 P ~ La(S,C)-TiO 2 1 h 86.7% TiO 2 P123 5 P123 La/S-TiO 2 Fig.5 Photocatalytic activity of nano-tio 2 films with different adding amounts of P123

5 312 La(S,C)-TiO 2 TiO 2 4(f) 3 1) 150 ( 10 h) TiO 2 2) P ( Ti ) 146 m 2 /g 240 m 2 /g La(S,C)-TiO 2 REFERENCES [1] YUAN Z H, JIA J H, ZHANG L D. Influence of codoping of Zn 2+ +Fe 3+ on the photocatalytic activity of TiO 2 for phenol degradation[j]. Materials Chem Phys, 2002, 73(4): [2],,. TiO 2 [J]., 2002, 20(3): LU Ping, YAO Ming-ming, ZHANG Ying, The effect of doping transition metal ions on photocatalysis of TiO 2 and its property[j]. Photographic Science and Photochemistry, 2002, 20(3): [3],,. TiO 2 [J]., 2003, 21: CHEN Jun-untao, LI Xin-jun, YANG Ying. Effect of RE doping for photocatalytic properties of TiO 2 thin films[j]. Journal of the Chinese Rare Earth Society, 2003, 21: [4],,. TiO 2 [J]., 2006, 16(5): XU Ke-jing, YANG Xin-chun, LI Zheng-min. Influence of different dopants on the photocatalysis of nano-tio 2 coating film[j]. The Chinese Journal of Nonferrous Metals, 2006, 16(5): [5] ASAHI R, MORKAWA T, OHWAKI T. Visible-light photocatalysis in nitrogen-doped titanium oxides[j]. Science, 2001, 293(13): [6] OHNO T, AKIYOSHI M, UMEBAYASHI T. Preparation of S-doped TiO 2 photocatalysts and their photocatytic activities under visible light[j]. Applied Catalysis A: General, 2004, 265(1): [7] MANESS P C, SMOLINSKI S, BLAKE D M. Bactericidal activity of photocatalytic TiO 2 reaction: Toward an understanding of its killing mechanism[j]. Appl Environ Microbiol, 1999, 65: [8] MARIA F A, VALENTINA G B, TIZIANO M B, PAOLO F. A high-frequency (95 GHz) electron paramagnetic resonance study of B-doped TiO 2 photocatalysts[j]. Inorganica Chimica Acta, 2008, 361: [9],,,. B/Fe 2 O 3 TiO 2 [J]., 2006, 16(12): LI Li-qing, LIU Zong-yao, TANG Xin-cun. Photocatalytic activity of nano- TiO 2 codoped with boron and B/Fe 2 O 3 in visible region[j]. The Chinese Journal of Nonferrous Metals, 2006, 16 (12): [10] LI Yue-xiang, MA Gang-feng, PENG Shao-qin. Boron and nitrogen co-doped titania with enhanced visible-light photocatalytic activity for hydrogen evolution[j]. Applied Surface Science, 2008, 254(21): [11],,. Pd/ZnO Ag/ZnO [J]., 2002, 23(4): JING Li-qiang, CAI Wei-min, SUN Xiao-jun. Preparation and characterization of Pd/ZnO and Ag/ZnO composite nanoparticles and their photocatalytic activity[j]. Chinese Journal of Catalysis, 2002, 23(4): [12] HAMAL D B, KLABUNDE K J. Synthesis, Characterization and visible light activity of new nanoparticle photocatalysts based on silver, carbon and sulfur-doped TiO 2 [J]. Journal of Colloid and Interface Science, 2007, 311(2): [13],,,. TiO 2 [J]. :, 2003, 17(3): 1 3. XU Ke-jing, GUO Yu-fang, ZHANG Wen-xue, WEI Chun-cheng. Preparation of nanometer TiO 2 with photocatalytic activity[j]. Journal of Shandong University of Technology: Science and Technology, 2003, 17(3): 1 3. [14],,. S TiO 2 [J]., 2008, 18(5): XU Ke-jing, SHANG Chao-feng, LI Fang. Mechanism of Sulfur-doping on TiO 2 Photo-response under visible light[j]. The Chinese Journal of Nonferrous Metals, 2008, 18(5): [15] SHENG Qiao-rong, YUAN Shuai, ZHANG Jin-long, CHEN Feng. Synthesis of La-doped mesoporous titania with highly crystallized wall by assembly of nanoanatase particles[j]. Microporous and Mesoporous Materials, 2006, 87(3): ( )

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