Photocatalytic Degradation of Reactive Green KE-4BD in Aqueous Solutions over N-Doped Titania

Abstract:

The photodegradation of reactive green KE-4BD solution is investigated using N-doped titania (N-TiO₂) under visible light irradiation. N-TiO₂ is prepared using ammonia or urea as a nitrogen source and characterized by X-ray diffraction, Brunauer-Emmett-Teller methods, and UV-visible diffuse reflectance spectra. The effects of the initial dye concentration and pH on photocatalytic degradation are studied, and the direct correlation between pH, dye concentration, and the rate of degradation are determined. Experimental results show that aqueous solutions of KE-4BD degrade easily in weakly acidic conditions in the presence of N-doped TiO₂ (1 g/L) as a photocatalyst. The optimized dye concentration for photolysis is 150 mg/L. The complete degradation of KE-4BD could be achieved under visible light irradiation, and the dye molecules could be partly decomposed into inorganic substances.

• Periodical: Advanced Materials Research (Volumes 183-185)
• Pages: 1767-1771
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.183-185.1767
• Online since: January 2011
• Authors: Gang Xin, Ju Shen, Ya Li Meng
• Keywords: N-Doped Titania, Photodegradation, Reactive Green KE-4BD

References

[1] M.A. Brown, S.C. De Vito: Crit. Rev. Environ. Sci. Technol. Vol. 23 (1993), p.249.

[2] Y.M. Slokar, A.M. Le Marechal: Dyes Pigments. Vol. 37 (1998), p.335.

[3] P.J. Halliday, S. Beszedits: Can. Textile J. Vol. 103 (1986), p.78.

[4] K.R. Ramakrishn, T. Viraraghavan: Water Sci. Technol. Vol. 36 (2) (1997), p.189.

[5] G.S. Gupta, G. Prasad, V.N. Singh: Water Res. Vol. 24 (1990), p.45.

[6] A. Aguedach, S. Brosillon J. Morvan, E. K. Lhadi: Appl. Catal. B: Environ, Vol. 57 (2005), p.55.

[7] J. Grzechulska, A.W. Morawski: Appl. Catal. B Vol. 36 (2002), p.45.

[8] M. Vautier, C. Guillard, J.M. Herrmann: J. Catal. Vol. 201 (2001), p.46.

[9] S. Naskar, S.A. Pillay, M. Chanda: J. Photochem. Photobiol. A Vol. 113(1998), p.257.

[10] C. Hachem, F. Bocquillon, O. Zahraa, M. Bouchy: Dyes Pigments Vol. 49 (2001), p.117.

DOI: 10.1016/s0143-7208(01)00014-6

[11] C. Hu, Y. Tang, J.C. Yu, P.K. Wong: Appl. Catal. B Vol. 40 (2003), p.131.

[12] H. Chun, W. Yizhong,: Chemosphere Vol. 39 (1999), p.2107.

[13] Y. Cong, J. Zhang, F. Chen, and M. Anpo: J. Phys. Chem. C Vol. 111(2007), p.6976.

[14] R. Asahi, T. Morikawa, T. Ohwaki, K. Aoki, Y. Taga: Science Vol. 293 (2001), p.269.