Murat ERDEMOĞLU, Meltem ASİLTÜRK, Sema ERDEMOĞLU, Hikmet SAYILKAN, Şadiye ŞENER, Funda SAYILKAN

Hydrothermal synthesis, characterization and photocatalytic activity of nanosized $TiO_2$ based catalysts for rhodamine B degradation

Nanosize crystalline TiO2 and SiO2/TiO2 mixed oxide particles as a photocatalyst for rhodamine B dye (RB) degradation in aqueous media were synthesized by a hydrothermal process at 200 °C. They were characterized using XRD, SEM, FT-IR, UV/VIS and BET analysis. The effects of silica content on the crystallinity and photocatalytic activity of TiO2 were investigated. Photocatalytic activity of the nano-TiO2 was compared with that of SiO2/TiO2 mixed oxides at the same conditions for degradation of RB, and mixed oxide catalysts showed more effective catalytic activity than the TiO2- The results revealed that photodegradation of RB proceeds by pseudo-first-order reaction kinetics where the rate constant, k, for degradation of 30 mg/L RB using the catalyst with 0.05 SiO2/TiO2 mole ratio is 0.133 $min^{-1}$

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1. D.S. Bhatkhande, V.G. Pangarkar and A.A.C.M. Beenackers, J. Chem. Technol. Biotechnol. 77, 102 (2001).
2. C. Hu, Y. Tang, Z. Jiang, Z. Hao, H. Tang and P.K. Wong, Appl. Catal. A: General 253, 389 (2003).
3. T. Zhang, T. Oyama, A. Aoshima, H. Hidaka, J. Zhao and N. Serpone, J. Photochem. Photobiol. A:Chemistry 140, 163 (2001).
4. Ö. Kartal, M. Erol and H. Oğuz, Chem. Eng. Technol. 24, 645 (2001).
5. I. Ilisz, A. Dombi, K. Mogyorosi, A. Farkas and I. Dekany, Appl. Catal. B: Environmental 39, 247 (2002).
6. S. Chiron, A. Fernandez-Alba, A. Rodriquez and E. Garcia-Calvo, Wat. Res. 34, 366 (2000).
7. Y. Chen, K. Wang and L. Lou, J. Photochem. Photobiol. A: Chemistry 163, 281(2004).
8. I. Bouzaida, C. Ferronato, J.M. Chovelon, M.E. Rammah and J.M. Herrmann, J. Photochem. Photobiol.A: Chemistry 168, 23 (2004).
9. A. Aguedach, S. Brosillon, J. Morvan and E.K. Lhadi, Appl. Catal. B: Environmental 57, 55 (2004).
10. K.Y. Jung and S.B. Park, Appl. Catal. A: Environmental 25, 249 (2000).
11. M.M. Yusuf, H. Imai and H. Hirashima, J. Sol-Gel Sci. Technol., 25, 65 (2002).
12. Y.V. Kolen'ko, B.R. Churagulov, M. Kunst, L. Mazerolles and C. Colbeau-Justin, App. Catal. B: Environ.,54, 51 (2004).
13. Y. Diaoued, S. Badilescu, P.V. Ashirt, D. Bersani, P.P. Lottici and J. Robichaud, J. Sol- Gel Sci. Technol.,24, 255 (2002).
14. C. Su, B.Y. Hong and CM. Tseng, Catal. Today, 96, 119 (2004).
15. K.Y. Jung and S.B. Park, Mater. Lett., 58, 2897 (2004).
16. H. Bala, J. Zhao, Y. Jiang, X. Ding, Y. Tian, K. Yu and Z. Wang, Mater. Lett., 59, 1937 (2005).
17. Y. Bessekhouad, D. Robert and J.W. Veber, J. Photochem. Photobiol. A: Chemistry, 157, 47 (2003).
18. Y.V. Kolen'ko, B.R. Churagulov, M. Kunst, L. Mazerolles and C. Colbeau-Justin, Appl. Catal. A: Environmental 54, 51 (2004).
19. F. Sayılkan, S. Erdemoğlu, M. Asiltürk, M. Akarsu, Ş. Şener, H. Sayılkan, M. Erdemoğlu and E. Arpaç, Mat.Res. Bull. 41, 2276 (2006).
20. M. Asiltürk, F. Sayılkan, S. Erdemoğlu, M. Akarsu, H. Sayılkan, M. Erdemoğlu and E. Arpaç, J. Hazard. Mater. 129, 164 (2006).
21. J. Yang, S. Mei and J.M.F. Ferreira, J. Europ. Ceram. Soc. 24, 335 (2004).
22. M. Kang, S-J. Choung and J.Y. Park, Catal. Today 87, 87 (2003).
23. A.A. Ismail, I.A. Ibrahim, M.S. Ahmed, R.M. Mohamed and H. Ell-Shall, J. Photochem. Photobiol. A:Chemistry 163, 445 (2004).
24. M.S. Vohra and K. Tanaka,Wat. Res. 37, 3992 (2003).
25. Y. Zhang, G. Xiong, N. Yao, W. Yang and X. Fu, Catal. Today 68, 89 (2001).
26. K. Guan, Surf. Coat. Technol. 191, 155 (2005).
27. Z. Feng, L. Kaiming, W. Guoliang, S. Hua and H. Anmin, J. Cryst. Growth 264, 297 (2004).
28. P. Cheng, M. Zheng, Y. Jin, Q. Huang and M. Gu, Mater. Lett. 4276, 1 (2002).
29. J. Yu, J.C. Yu and X. Zhao, J. Sol-Gel Sci. Tech. 24, 95 (2002).
30. S. Hong, M.S. Lee, S. Park and G. Lee, Catal. Today 87, 99 (2003).
31. C. Xie, Z. Xu, Q. Yang, B. Xue, Y. Du and J. Zhang, Mater. Sci. Eng. B 112, 34 (2004).
32. K.Y. Jung, S.B. Park and S. Ihm, Appl. Catal. B: Environmental 51, 239 (2004).
33. P. Cheng, M. Zheng, Q. Huang, Y. Jin, and M. Gu, J. Mater. Sci. Lett. 22, 1165 (2003).
34. H.M. Sung-Suh, J.R. Choi, H.J. Hah, S.M. Koo and Y.C. Bae, J. Photochem. Photobiol. A: Chemistry 163, 37 (2004).
35. Y. Zhang, H. Xu, Y. Xu, H. Zhang and Y. Wang, J. Photochem. Photobiol. A: Chemistry, 170, 279 (2005).