화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.17, No.2, 331-339, March, 2011
DOI10.1016/j.jiec.2011.02.035  Export Citation
Comparative study on nano-crystalline titanium dioxide catalyzed photocatalytic degradation of aromatic carboxylic acids in aqueous medium
V.G. Gandhi1, M.K. Mishra1, M.S. Rao1, A. Kumar2, P.A. Joshi1, †, and D.O. Shah1, 3
  • 1Department of Chemical Engineering & Shah Schulman Center for Surface Science and Nanotechnology, Dharmsinh Desai University, College Road, Nadiad 387 001, Gujarat, India
  • 2R&D Centre, Reliance Industries Limited, Baroda, Gujarat, India
  • 3Center for Surface Science and Engineering, University of Florida, Gainesville, USA
E-mail:
The comparative study on titanium dioxide (TiO2) catalyzed photocatalytic degradation (PCD) of aqueous aromatic carboxylic acids (phthalic acid, o-nitrobenzoic acid, o-chlorobenzoic acid and benzoic acid) was carried out in the presence of UV radiation using air. The TiO2 catalyst, synthesized by sol-gel technique and calcined at 673 K, resulted ca. 100% anatase phase with 23 nm crystallite size and surface area of 37 m2/g. This catalyst was found to be efficient for PCD of phthalic acid, o-nitrobenzoic acid, ochlorobenzoic acid and benzoic acid in aqueous medium. However, the reactivity and degradation pathway of these carboxylic acids were observed to be greatly influenced by the substituent group present in the aromatic ring. The order of degradation of aromatic carboxylic acids was found to be phthalic acid > o-nitrobenzoic acid > o-chlorobenzoic acid > benzoic acid. The aromatic carboxylic acids having electron withdrawing groups such as -COOH, -NO2 and -Cl were comparatively more reactive for PCD than unsubstituted aromatic acid i.e., benzoic acid. The degradation of ortho substituted benzoic acids (having electron withdrawing groups) follows different mechanistic pathway than that of benzoic acid. Study of various operational parameters like effect of catalyst loading, initial concentration of phthalic acid and kinetics of phthalic acid PCD was also carried out in batch type photocatalytic reactor.
Keywords:Photocatalytic degradation;Nano-crystalline titanium dioxide;Aromatic carboxylic acids
  1. Gupta VK, Carrott PJM, Ribeiro Carrott MML, Suhas RC, Crit. Rev. Environ. Sci. Technol., 39, 783 (2009)
  2. Patel HA, Bajaj HC, Jasra RV, Ind. Eng. Chem. Res., 48(2), 1051 (2009)
  3. Arami M, Limaee NY, Mahmoodi NM, Tabrizi NS, J. Colloid Interface Sci., 288(2), 371 (2005)
  4. Arami M, Limaee NY, Mahmoodi NM, Tabrizi NS, J. Hazard. Mater., 135(1-3), 171 (2006)
  5. Arami M, Limaee NY, Mahmoodi NM, Chemosphere., 65, 1999 (2006)
  6. Vlyssides AG, Loizidou M, Karlis PK, Zorpas AA, Papaioannou D, J. Hazard. Mater., 70, 41 (1999)
  7. Pearce CL, Lloyd JR, Guthrie JT, Dyes Pigm., 58, 179 (2003)
  8. Venkata Mohan S, Sailaja P, Srimurali M, Karthikeyan J, Environ. Eng. Policy., 1, 149 (1999)
  9. Aksu Z, Process Biochem., 40, 997 (2005)
  10. Mills A, Davies RH, Worsley D, Chem. Soc. Rev., 22, 417 (1993)
  11. Ollis DF, Pellizzetti E, Serpone N, Environ. Sci. Technol., 25, 1523 (1991)
  12. Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69 (1995) 
  13. Bhatkhande DS, Pangarkar VG, Beenackers AACM, J. Chem. Technol. Biotechnol., 77, 102 (2001)
  14. Legrini O, Oliveros E, Braun AM, Chem. Rev., 93, 671 (1993)
  15. Song SH, Kang MS, J. Ind. Eng. Chem., 14(6), 785 (2008)
  16. Herrmann JM, Tahiri H, Guillard C, Pichat P, Catal. Today, 54(1), 131 (1999)
  17. Guillard C, J. Photochem. Photobiol. A: Chem., 135, 65 (2000)
  18. Modestov AD, Lev O, J. Photochem. Photobiol. A: Chem., 12, 261 (1998)
  19. Ajmera AA, Sawant SB, Pangarkar VG, Beenackers AACM, Chem. Eng. Technol., 25(2), 173 (2002)
  20. Chhor K, Bocquet JF, Colbeau-Justin C, Mater. Chem. Phys., 86(1), 123 (2004)
  21. Velegraki T, Mantzavinos D, Chem. Eng. J., 140(1-3), 15 (2008)
  22. Vione D, Minero C, Maurino V, Carlotti AE, Picatonotto T, Pelizzetti E, Appl. Catal. B: Environ., 58(1-2), 79 (2005)
  23. Tahiri H, Ichou YA, Herrmann JM, J. Photochem. Photobiol. A: Chem. I., 14, 219 (1998)
  24. Assabane A, Ichou YA, Tahiri H, Guillard C, Herrmann JM, Appl. Catal. B: Environ., 24(2), 71 (2000)
  25. Serpone N, Martin J, Horikoshi S, Hidaka H, J. Photochem. Photobiol. A: Chem., 169, 235 (2005)
  26. Tanaka K, Luesaiwong W, Hisanaga T, J. Mol. Catal. A: Chem., 122, 67 (1997)
  27. Peiro AM, Ayllon JA, Peral J, Domenech X, Appl. Catal. B: Environ., 30(3-4), 359 (2001)
  28. Mishra MK, Tyagi B, Jasra RV, Ind. Eng. Chem. Res., 42(23), 5727 (2003)
  29. Rengaraj S, Li XZ, J. Mol. Catal. A-Chem., 243(1), 60 (2006)
  30. Cullity BD, Stock SR, Elements of X-ray Diffraction, Prentice Hall, Upper Saddle River, NJ (2001)
  31. Gregg SJ, Sing KSW, Adsorption, Surface Area and Porosity, 2nd ed., Academic Press, New York (1982)
  32. Su C, Hong BY, Tseng CM, Catal. Today, 96(3), 119 (2004)
  33. Kumar S, Chandra R, Opt. Mater., 27, 1346 (2005)
  34. Moser J, Punchihewa S, Infelta PP, Gratzel M, Langmuir., 7, 3012 (1991)
  35. Tunesi S, Anderson MA, Langmuir., 8, 487 (1992)
  36. Vautier M, Guillard C, Herrmann JM, J. Catal., 201(1), 46 (2001)
  37. Turchi CS, Ollis DF, J. Catal., 122, 178 (1990)
  38. Al-Ekabi H, Serpone N, J. Phys. Chem., 92, 5726 (1988)
  39. Swarnalatha B, Anjaneyulu Y, J. Mol. Catal. A-Chem., 223(1-2), 161 (2004)
  40. Wei YT, Wan C, J. Photochem. Photobiol. A: Chem., 69, 241 (1992)
  41. Gautam S, Kamble SP, Sawant SB, Pangarkar VG, Chem. Eng. J., 110(1-3), 129 (2005)