Use of semi-conducting bismuth sulfide as a photocatalyst for degradation of rose bengal

Shweta Sharma, Rakshit Ameta, R. K. Malkani, Suresh C. Ameta

Abstract


Different methods have been adopted for the removal and degradation of dyes from effluents of textile, dyeing and printing industries. These methods have their own merits and drawbacks. In the present investigation, bismuth sulfide has been used as a photocatalyst for the degradation of rose Bengal. The effect of different parameters like the pH, concentration of dye solution, amount of semiconductor and light intensity on the rate of reaction has been investigated. The reaction follows pseudo-first order kinetics. The optimum conditions were obtained as: [rose Bengal] = 1.60·10–5 M; Bi2S3 = 0.10 g; pH = 8.5, and light intensity = 50.0 mW·cm–2. The rate constant was 4.68·10–5 sec–1. A mechanism has been proposed for the degradation of rose Bengal involving hydroxyl radicals.

Keywords


semiconductor; photocatalyst; rose Bengal; hydroxyl radical; bismuth sulphide

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References


H. Hidaka, Photodegradation of surfactants with TiO2 semiconductor for the environmental wastewater treatment, Proc. Indian Acad. Sci. (Chem. Sci.) 110, 215–228 (1998).

F.S. Zhang, J. Nriagm, H. Itoh, Photocatalytic removal and recovery of mercury from water using TiO2 modified sewage sludge carbon, J. Photochem. Photobiol. 167A, 223–227 (2004).

R.E.P. Nogueria, W.F. Jardin, Photodegradation of methylene blue using sunlight and TiO2, J. Chem. Educ. 70, 861–862 (1993).

M. Ksibi, S. Ben-Amor, S. Cherif, E. Elaoui, A. Houas, M. Elaloui, Photodegradation of lignin from black liquor using a U.V./TiO2 system, J. Photochem. Photobiol. 154A, 211–215 (2003).

C. Karunakaran, S. Senthilvelan, Semiconductor catalysis of solar photooxidation, Curr. Sci. 18, 962–967 (2005).

T. Wu, T. Un, J. Zhao, H. Hidaka, N. Serpone, Photodegradation of squarylium cyanine dye under visible light irradiation, Environ. Sci. Technol. 33, 1379–1387 (1999).

S.S. Wang, Z.H. Wang, Q.X. Zhuang, Photocatalytic reaction of environmental pollutants Cr (VI) over CdS powder, Appl. Catal. 1, 257–270 (1992).

R. Ameta, A. Pandey, P.B. Punjabi, S.C. Ameta, Photocatalytic activity of antimony (III) sulphide in bleaching of azure-B, Chem. Environ. Res. 14, 255–260 (2005).

S. Kothari, R. Vyas, R. Ameta, P. B. Punjabi, Photoreduction of congo red by ascorbic acid and EDTA over cadmium sulphide as photocatalyst, Indian J. Chem. 44A, 2266–2269 (2005).

R. Ameta, J. Vardia, P.B. Punjabi, Suresh C. Ameta, Use of semiconducting iron(III) oxide in photocatalytic bleaching of some dyes, Indian J. Chem. Tech. 13, 114–118 (2006) .

X.Z. Li, H.L. Liu, P.T. Yue, Y.P. Sun, Photoelectrocatalytic oxidation of rose bengal using a Ti/TiO2 mesh electrode, Environ. Sci. Technol. 34, 4401–4406 (2000).

E. Gogna, R. Vohra, P. Sharma, Biodegradation of rose bengal by Phanerochaete chrysosporium, Lett. Appl. Microbiol. 14, 58–60 (2008).

H. Liu, D. Zhou, X. Li, Pi. Yue, Photoelectrocatalytic degradation of rose bengal, J. Environ. Sci. 15, 595– 599 (2003).

A. Zakrzewski, D.C. Neckers, Bleaching products of rose bengal under reducing conditions, Tetrahedron 43, 4507–4512 (1987).

I.M. Kobasa, G.P. Tarasenko, Photocatalysis of reduction of the dye methylene blue by Bi2S3/CdS nanocomposites, Theor. Exp. Chem. 38, (2002), 255–258.




DOI: http://dx.doi.org/10.20450/mjcce.2011.37

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