PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Czasopismo
2009 | 7 | 1 | 118-129
Tytuł artykułu

Structural characterization of Th-doped TiO2 photocatalyst and its extension of response to solar light for photocatalytic oxidation of oryzalin pesticide: a comparative study

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The degradation efficiency of Th-doped TiO2 / TiO2 photocatalysts were investigated under UV and solar light illumination. The model compound chosen for the study was Oryzalin (OZ). Doping of inner transition metal ion Th was intended to modify the electronic properties of TiO2. The Th-doped TiO2 were synthesized by incorporating 0.02, 0.04, 0.06, and 0.1 atom percentage of Th into the TiO2 lattice by solid-state reaction. The stochiometry of the prepared samples is Ti1−xThxO2, where ‘x’ is the percentage of Th. The samples were characterized by UV-Visible absorption, UV-Visible -Diffused reflectance spectra, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDX) and X-ray Diffraction (XRD). The pore size and surface area of these samples were studied by Brunauer, Emmett and Teller (BET) adsorption method. It was found that metal ion doping at various percentage compositions enables a large shift in the absorption band of the TiO2 towards visible light region. This is due to the formation of various mid band gaps at 2.84 eV, 2.804 eV, 2.66 eV, and 2.55 eV. The extent of degradation of the pesticide was followed by UV-Visible spectroscopy and GC-MS methods. Based on the spectral analysis, the probable degradation reaction mechanism for OZ is proposed. These results indicate that Th-doped TiO2 with the modified electronic properties is a good catalyst under solar light irradiation. But these particles show marginal variation in rates under UV-illumination. All the photodegradation reactions follow the first order kinetics. [...]
Wydawca

Czasopismo
Rocznik
Tom
7
Numer
1
Strony
118-129
Opis fizyczny
Daty
wydano
2009-03-01
online
2008-12-23
Twórcy
  • Department of Chemistry, Bangalore University, Bangalore, 560 001, India
Bibliografia
  • [1] R.T. Meister, Farm Chemicals Handbook’ 92 (Meister Publishing Company, Willoughby, 1993)
  • [2] Occupational Health Services, Inc. 1992 Nov. 17. MSDS for ORYZALIN (OHS Inc., Secaucus, 1992)
  • [3] U. S. Department of Agriculture, Soil Conservation Service. 1990 Nov. SCS/ARS/CES Pesticide Properties Database: Version 2.0 Summary. USDA - Soil Conservation Service, Syracuse, NY
  • [4] WSSA Herbicide Handbook Committee, Herbicide Handbook of the Weed Science Society of America, 6th edition (WSSA, Champaign, 1989)
  • [5] U.S. Environmental Protection Agency, June 30, 1987, Pesticide Fact Sheet Number 211: ORYZALIN. US EPA, Office of Pesticide Programs, Registration Div., Washington, DC.
  • [6] U.S. Environmental Protection Agency, June 20, 1990, Pesticide tolerance for Oryzalin. Federal Register 55119: 25140–25141
  • [7] British Crop Protection Council, The Pesticide Manual: A World Compendium, 7th edition (Croydon, England. 1983)
  • [8] U.S. Environmental Protection Agency, Nov. 21, 1984, Tolerances and exemptions from tolerances for pesticide chemicals in or on raw agricultural commodities; Oryzalin. Federal Register 49(226): 45854–45855
  • [9] Washington State Department of Transportation, Roadside Vegetation Management: Environmental Impact Statement, WSDOT (1993)
  • [10] Elanco Chemical Company, Summary of Basic Data for Oryzalin Herbicide, Elanco Products Co. (MSDS, Indianapolis, 1989)
  • [11] R.D. Wauchope, T.M. Buttler, A.G. Hornsby, P.W.M. Augustijn Beckers, J.P., Burt; SCS/ARS/CES, Rev. Environ. Contam. Toxicol. 123 1–157 (1992).
  • [12] M.D. Bethesda, U.S. National Library of Medicine, Hazardous Substances Data bank, 9–10 (1995)
  • [13] E. Borgarello, J. Kiwi, M. Gratzel, E. Pelizzetti, M. Viscald, J. Am. Chem. Soc. 104, 2996 (1982) http://dx.doi.org/10.1021/ja00375a010[Crossref]
  • [14] E. Pelizzetti, N. Serpone, eds, Homogeneous and Heterogeneous photocatalysis (Reidel, Dordtecht, 1986)
  • [15] M. Schiavello, ed., Photocatalysis and Environment: Trends and Applications (Kluwer Academic publishers, Dordrecht, 1988)
  • [16] E. Pelizzetti, N. Serpone, eds, Photocatalysis: fundamental and Applications (Wiley, New York, 1989)
  • [17] J. Soria, J. C. Conesa, V. Augugliaro, L. Palmisano, M. Schiavello, A. Sclafani J. Phys. Chem. 95, 275 (1991) http://dx.doi.org/10.1021/j100154a052[Crossref]
  • [18] N. Serpone, D. Lawless, Langmuir 10, 643 (1994) http://dx.doi.org/10.1021/la00015a010[Crossref]
  • [19] W. Choi, A. Termin, M.R. Hoffmann, J. Phys. Chem. 98, 13669–13679 (1994) http://dx.doi.org/10.1021/j100102a038[Crossref]
  • [20] H. Yamashita, H. Nishiguchi, N. Kamada, M. Anpo, Y. Teraoka, H. Hatano, S. Ehara, K. Kikui, L. Palmisano, A. Sclafani, M. Schiavello, M.A. Fox, Res. Chem. Intermediates. 20, 815 (1994) http://dx.doi.org/10.1163/156856794X00568[Crossref]
  • [21] Y, R. Do, W. Lee, K. Dwight, A. Wold, J. Solid State Chem. 108, 198 (1994) http://dx.doi.org/10.1006/jssc.1994.1031[Crossref]
  • [22] J. Papp, S. Soled, K. Dwight, A. Wold, Chem. Mater. 6, 496 (1994) http://dx.doi.org/10.1021/cm00040a026[Crossref]
  • [23] G. Marcì, L. Palmisano, A. Sclafani, A.M. Venezia, R. Campostrini, G. Carturan, C. Martin, V. Rives, G. Solana, J. Chem. Soc., Faraday Trans. 92, 819 (1996) http://dx.doi.org/10.1039/ft9969200819[Crossref]
  • [24] C. Martín, G. Solana, V. Rives, G. Marcì, L. Palmisano, A. Sclafani, Catalysis Letters 49, 235 (1997) http://dx.doi.org/10.1023/A:1019025926206[Crossref]
  • [25] M. Takeuchi, H. Yamashita, M. Matsuoka, M. Anpo, T. Hirao, N. Itoh, N. Iwamoto, Catalysis Letters 67, 135 (2000) http://dx.doi.org/10.1023/A:1019065521567[Crossref]
  • [26] L. Gomathi Devi, G.M. Krishnaiah, Journal of Photochemistry and photobiology A: Chemistry 121, 141 (1999) http://dx.doi.org/10.1016/S1010-6030(98)00389-X[Crossref]
  • [27] Y. Suda, H. Kawasaki, T. Ueda, T. Ohshima, Thin solid films 453, 162 (2004) http://dx.doi.org/10.1016/j.tsf.2003.11.185[Crossref]
  • [28] B. Wawrzyniak, A. Morawska, B. Tryba, International Journal of Photoenergy 2006, 1 (2006) http://dx.doi.org/10.1155/IJP/2006/68248[Crossref]
  • [29] J.D. Lee, Concise Inorganic Chemistry, 5th edition (Chapmann and Hall publication, London, 1996)
  • [30] K. Prasad, A.R. Bally, P.E. Schmid, F. Lévy, J. Benoit, C. Barthou, P. Benalloul, Jpn. J. Appl. Phys. 36, 5696 (1997) http://dx.doi.org/10.1143/JJAP.36.5696[Crossref]
  • [31] T.R.N. Kutty, P. Murugaraj, N.S. Gajbhiye, Mater. Lett. 2, 396 (1984) http://dx.doi.org/10.1016/0167-577X(84)90119-8[Crossref]
  • [32] T.R.N. Kutty, P. Murugaraj, N.S. Gajbhiye, Mater. Res. Bull. 20, 565 (1985) http://dx.doi.org/10.1016/0025-5408(85)90112-6[Crossref]
  • [33] T.R.N. Kutty, L. Gomathi Devi, Mater. Res. Bull. 20, 793 (1985) http://dx.doi.org/10.1016/0025-5408(85)90058-3[Crossref]
  • [34] M.P. Fuller, P.R. Griffiths, Analytical Chemistry 5013, 1906 (1978) http://dx.doi.org/10.1021/ac50035a045[Crossref]
  • [35] M. Cardona, G. Harbeke, Phys. Rev. 137A, 1467 (1964)
  • [36] N.F.M. Henry, K. Lonsdale, Eds.; International Tables for X-ray Crystallography Vol.1 (Kynoch press, Birmingham, 1952)
  • [37] L.D. Dong, J. Phy. Chem. B 104, 78 (2000) http://dx.doi.org/10.1021/jp9914424[Crossref]
  • [38] B.D. Cullity, Elements of X-ray Diffraction (Addison-Weseley Publishing Co., Reading, MA, 1978) 140
  • [39] H.P. Maruska, A.K. Ghosh, Solar Energy Mater. 1, 237 (1979) http://dx.doi.org/10.1016/0165-1633(79)90042-X[Crossref]
  • [40] R. Silverstein, G. Bassler, T. Morrill, Spectroscopic Identification of Organic Compounds, 4th edition (Wiley, New York, 1981)
  • [41] M.S. Krieger, D.A. Merritt, J.D. Wolt, V.L. Patterson, J. Agric. Food Chem. 46, 3292 (1998) http://dx.doi.org/10.1021/jf980289s[Crossref]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-008-0101-9
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.