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Received April 9, 2013
Accepted July 31, 2013
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Photodegradation of 2,4,6-trinitrophenol catalyzed by Zn/MgO nanoparticles prepared in aqueous-organic medium
Department of Chemistry, GC University Lahore, Lahore 54000, Pakistan
Korean Journal of Chemical Engineering, November 2013, 30(11), 2100-2107(8), 10.1007/s11814-013-0142-4
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Abstract
Synthesis of Magnesium oxide (MgO) nanoparticles and zinc deposited magnesium oxide (Zn/MgO) nanoparticles was carried out using hydrothermal and deposition-precipitation method with the variation of 1-Propanol (organic solvent) concentration, sodium hydroxide and urea concentration. The nanoparticles were characterized by using FTIR, TGA, SEM-EDX, TEM and XRD. The photocatalytic efficiency of MgO and Zn/MgO nanoparticles was studied by degradation of 2,4,6-trinitrophenol (TNP), which is highly acute and toxic and causes skin and eyes diseases, liver malfunction and tumor formation. Photodegradation of TNP was carried out under UV irradiation and confirmed by using HPLC and GC-MS. MgO and Zn/MgO nanoparticles that were synthesized by using urea showed higher firstorder rate constant (k) value and percentage degradation as compared to nanoparticles that were synthesized using NaOH. It was observed that the concentration of solvent has direct relation with the k value of degradation of TNP.
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Rajagopalan S, Koper O, Decker S, Klabunde KJ, Chemistry., 8, 2602 (2002)
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Koper OB, Lagadic I, Volodin A, Klabunde KJ, Chem.Mater., 9, 2468 (1997)
Pei LZ, Yin WY, Wang JC, Fan CG, Zhang QF, Mater.Res., 13, 339 (2010)
Bang J, Yang H, Holloway PH, Nanotechnology., 17, 973 (2006)
Qiang XB, Hua D, Nian DY, Bin YT, T. Nonferr. Metal.Soc., 17, 671 (2007)
Subbaiah, S. C. Mallick, I. N. Bhattacharya, S. Anand, Das RP, The European Journal of Mineral Processing and Environmental Protection., 4, 1303 (2004)
Becheri A, Durr M, Nostro PL, Baglioni P, J. Nanopart. Res., 10, 679 (2008)
Hanawalt JD, Rinn HW, Frevel LK, Anal. Chem., 10, 475 (1938)
Suryanarayana C, Norton MG, X-ray diffraction: A practical approach, Springer, USA, 129 (1998)
Muneer I, Farrukh MA, Shagharf, Khaleeq-ur-Rahman M, Umar AA, Adnan R, Mater. Sci. Forum., 756, 197 (2013)
Darke FH, Pierce GW, Dow MT, Phy. Rev., 35, 613 (1930)
Lee JH, Je J, Hur J, Schlautman MA, Carraway ER, Analyst., 128, 1257 (2003)
Ashley K, Connor PEO NIOSH manual of analytical methods, Ed. 4, Method No. S228, NIOSH Publication, USA (1994)
Nipper M, Qian Y, Carr RS, Miller K, Chemosphere., 56, 519 (2004)
