Use of zirconium phosphate system as a photocatalyst: Photobleaching of tolonium chloride


  • O. P. Panwar Photochemistry and Solar Energy Laboratory, Department of Chemistry, M. L. Sukhadia University, Udaipur (Rajasthan)
  • Anil Kumar Photochemistry and Solar Energy Laboratory, Department of Chemistry, M. L. Sukhadia University, Udaipur (Rajasthan)
  • Rameshwar Ameta Photochemistry and Solar Energy Laboratory, Department of Chemistry, M. L. Sukhadia University, Udaipur (Rajasthan)
  • Suresh C. Ameta Govt. Meera Girls College, Udaipur (Rajasthan)



wastewater treatment, photocatalytic bleaching, tolonium chloride, zirconium phosphate, semiconductor


Water pollution due to effluents from dyes and printing industries poses a serious problem for aquatic life. Photocatalysis has attracted the attention of chemists all over the world because it is an efficient and ecofriendly process to combat the problem of water pollution. Photocatalytic bleaching of tolonium chloride on zirconium phosphate was carried out in presence of light. The progress of the reaction was monitored spectrophotometrically, and it follows pseudo first order kinetics. The effect of variation of different parameters, like concentration of tolonium chloride, pH, amount of semiconductor and light intensity on the rate of bleaching, was also studied. A tentative mechanism for the photocatalytic bleaching of tolonium chloride has been proposed.


S. Sahasi, N. K. Jain, M. Dak, M. Bala, S. C. Ameta, Heterogeneous and homogeneous photocatalysis, part IInorganic substrates, Asian j. Chem. Rev., 2, 90–99 (1991).

Z. Ali, R. Ameta, J. Vardia, R. Ameta, S. C. Ameta, Photocatalysis : A frontier of photochemistry, J. India Chem. Soc., 78, 281–287 (1999).

B. Singhal, A. Porwal, A. Sharma, R. Ameta, S. C. Ameta, Photocatalytic degradation of cetylpyridinium chloride over titanium dioxide powder, J. Photochem. Photobiol. A, 108, 85–88 (1997).

A. Sharma, P. Rao, R. P. Mathur, S. C. Ameta, Photocatalytic reactions of xylidin ponceau on semiconducting zinc oxide powder, J. Photchem. Photobiol. A, 86, 197– 200 (1995).

H. Yoneyama, Y. Yamashita, H. Tamura, Heterogeneous photocatalytic reduction of dichromate on n-type semiconductor catalysts, Nature, 282, 817–818 (1979).

M. C. C. Costa, L. F. Hodson, R. A. W. Johnstone, J. Y. Liu, The mechanism of gas-phase dehydration of cyclohexanol and the methylcylohexanols catalysed by zirconium phosphate and zirconium phosphate, J. Mol. Catl.A, 142, 349–360 (1999).

K. Sayama, H. Arakawa, Photocatalytic decomposition of water and photocatalytic reduction of carbon dioxide over zirconia catalyst, J. Phys. Chem., 97, 531–533 (1993).

G. Marci, V. Augughiaro, R. J. D. Tilley, M. J. Lopez- Munoz, C. Martin, I. L. Palmisano, V. Rives, M. S. Schiavello, Preparation characterization and photocatalytic activity of polycrystalline ZnO/TiO2 systems. J. Phys. Chem. B, 105, 1026–1032 (2001).

S. Gelover, P. Mondragon, A. Jimenez, Titanium dioxide sol-gel deposited over glass and its application as a photocatalyst for water decontamination, J. Photochem. Photobiol. A, 165, 241–246 (2004).

T. Kako, H. Irie, K. Hashimoto, Prevention against catalytic poising by H2S utilizing TiO2 photocatalyst, J. Photochem. Photobiol. A, 171, 131–135 (2005).

G. Colon, J. M. Sanchez-Espana, M. C. Hidalgo, J. A. Navio, Effect of TiO2 acidic pretreatment on the Photocatalytic properties for phenol degradation, J. Photochem. Photobiol. A, 179, 20–27 (2006).

M. Ksibi, S. Ben-Amor, S. Cherif, E. Elaouim A. Houas, M. Elaloui, Photodegradation of lignin from black liquor using a UV/TiO2 system, J. Photochem. Photobiol. A, 154, 211–218 (2003).

S. Alex, U. Santosh, D. Das, Dye sensitization of nanocrystalline TiO2 : enhanced efficiency of unsymmetrical versus symmetrical squaraine dyes, J. Photochem. Photobiol. A, 172, 63–71 (2005).

M. Morwetz, E. Selli, Effect of iron species in the photocatalytic degradation of an azo dye in TiO2 aqueous suspensions, J. Photochem. Photobiol. A, 162, 89–95 (2004).

S. S. Kim, J. H. Yun, Y. E. Sung, Flexible dye sensitized solar cells using ZnO coated TiO2 nanopraticles, J. Photochem. Photobiol. A, 171, 269–273 (2005).

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

A. F. Martins, M. L. Wilde, C. Da Silveira, Photocatalytic degradation of brilliant red dye and textile wastewater, J. Environ. Sci. Health. A, 41, 675–685 (2006).

H. L. Xia, H. S. Zhuang, T. Zhang, D. C. Xiao, Photocatalytic degradation of acid blue 62 over CuO-SnO2 nanocomposite photocatalyst under simulated sunlight, J. Environ. Sci. (China), 19, 1141–47 (2007).

O. P. Panwar, A. Kumar, M. Paliwal, R. Ameta, S. C. Ameta, Use of zirconium phosphate as photocatalyst in photobleaching of some dyes, Bull. Cat. Soc. India, 7, 105–110 (2008).




How to Cite

Panwar, O. P., Kumar, A., Ameta, R., & Ameta, S. C. (2008). Use of zirconium phosphate system as a photocatalyst: Photobleaching of tolonium chloride. Macedonian Journal of Chemistry and Chemical Engineering, 27(2), 133–139.



Chemical Engineering