OALib Journal期刊
PreparationandCharacterizationofHighActivityZirconium-DopedAnataseTitaniaforSolarPhotocatalyticDegradationofEthidiumBromide
DOI: 10.1016/S1872-2067(10)60200-8
Keywords: sunlight ,titania ,zirconium ,ethidiumbromide ,elimination
Abstract:
？Ethidiumbromideisafluorescenttagandisusedinbiomedicalapplications.ItisapotentmutagenbecauseofitsDNAintercalatingnature.Acatalystcompositionforthefeasibleeliminationofethidiumbromideusingabroadspectrumofsolarradiationwasinvestigated.NanostructuredanataseTiO2wassynthesizedbygeltocrystallineconversionanditsbandgapwasengineeredbydopingwithzirconiumtoeffectivelyharnesssunlight.ThedopednanocrystalswerecharacterizedbyX-raydiffraction,scanningelectronmicroscopy,transmissionelectronmicroscopy,energydispersiveX-rayanalysis,andUV-Visspectroscopy.Theformedcrystalsretainedtheanatasephasewithamarginalincreaseinsize.ThepulverizationprocessusedtodopeZrintotitaniaresultedinananoanddopedlatticewithanincreasedandextendedlightabsorptionrange,whichgaveanearlyfive-foldincreaseinphotoactivityoverpuretitania.Thecatalyticeffectofthemodifiedtitania,thedopantconcentration,andthedynamicsofthedopantconcentrationonthechargecarriers(trapping-recombination)forthedegradationofthemutagenwasinvestigated.Themodifiedtitaniaiscapableoftotalethidiumbromideeliminationinsunlight.ThelossofitsmutagenicpropertywasconfirmedbyanAmestest.Theinducedrevertantcoloniesobservedwerenilinthetreatedsampleindicatingacompletelossoftheintercalatingpropertyofthemutagen.
References
[1] aron D M, Ames B N. Mut Res, 1983, 113: 173 [2] ortelmans K, Zeiger E. Mut Res, 2000, 455: 29 [3] mes B N, McCann J, Yamasaki E. Mutat Res, 1975, 31: 347 [4] athur N, Bhatnagar P, Bakre P. Appl Ecol Env Res, 2005, 4: 111 [5] dan C, Bahamonde A, Martinez-Arieas A, Fernandez-Garcia M, Perez-Estrada L A, Malato S. Catal Today, 2007, 129: 79 [6] aisal M, Abu Tariq M, Muneer M. Dyes Pigm, 2007, 72: 233 [7] uzuki H, Amano T, Toyooka T, Ibuki Y. Environ Sci Technol, 2008, 42: 8076 [8] engen P N. Trends Biochem Sci, 1994, 19: 257 [9] unn G, Sansone E B. Anal Biochem, 1987, 162: 453 [10] Fox M A, Dulay M T. Chem Rev, 1993, 93: 341 [11] Pelizzeti E, Minero C. Electrochim Acta, 1993, 38: 47 [12] Kormann C, Bahnemann D W, Hoffmann M R. J Photochem Photobiol A, 1989, 48: 161 [13] Muruganandham M, Swaminathan M. Dyes Pigm, 2006, 68: 133 [14] Sonawane R S, Mohan Dongare K. J Mol Catal A, 2006, 243: 68 [15] Toor A P, Verma A, Jotshi C K, Bajpai P K, Singh V. Dyes Pigm, 2006, 68: 53 [16] da Silva C G, Faria J L. J Photochem Photobiol A, 2003, 155: 133 [17] Hu C, Lan Y, Qu J, Hu X, Wang A. J Phys Chem B, 2006, 110: 4066 [18] Seery M K, George R, Floris P, Pillai S C. J Photochem Photobiol A, 2007, 189: 258 [19] Devi L G, Murthy B N, Kumar S G. Chemosphere, 2009, 76: 1163 [20] Sakulkharmarnethai S, Kitiyanan A, Yoshikawa S. J Ceram Process Res, 2006, 7: 10 [21] Liu S, Yu J, Jaroniec M. J Am Chem Soc, 2010, 132: 11914 [22] Liu S, Yu J, Mann S. J Phys Chem C, 2009, 113: 10712 [23] Lukac J, Klementova M, Bezdicka P, Bakardjieva S, Subrt J, Szatmary L, bastl Z, Jirkovsky J. Appl Catal B, 2007, 74: 83 [24] Gao B, Lim T M, Subagio D P, Lim T T. Appl Catal A, 2010, 375: 107 [25] Swetha S, Santhosh S M, Balakrishna R G. Photochem Photobiol, 2010, 86: 628 [26] Henry N F M, Lonsdale K. International Tables for X-Ray Crystallography. Birmingham: Kynoch Press, 1952. 151 [27] Chen S, Chen L, Gao S, Cao G. Chem Phys Lett, 2005, 413: 404 [28] Abrams B L, Wilcoxon J P. Crit Rev Solid State Mater Sci, 2005, 30: 153 [29] Aghababazadeh R, Mirhabibi A R, Brydson R, Salehpour Z. Proceedings of 1st International Conference on Nanostruc-tured Materials and Nanocomposites. India: Kottayam, 2009 [30] Devi L G, Balakrishna R G. Pol J Chem, 2005, 79: 915
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