Received 15 March 2016; accepted 4 June 2016. KEYWORDS .... New Zealand, Portugal and other countries), their fate in waters, soil, ...... Volta, J.C., 2003.
Arabian Journal of Chemistry (2016) xxx, xxx–xxx
King Saud University
Arabian Journal of Chemistry www.ksu.edu.sa www.sciencedirect.com
ORIGINAL ARTICLE
Reactive adsorption of toxic organophosphates parathion methyl and DMMP on nanostructured Ti/Ce oxides and their composites Jirˇı´ Henych a,b,*, Pavel Janosˇ b, Martin Kormunda c, Jakub Tolasz a,c, Va´clav Sˇtengl a Materials Chemistry Department, Institute of Inorganic Chemistry AS CR v.v.i., 25068 Rˇezˇ, Czech Republic Faculty of Environment, J.E. Purkyneˇ University in U´stı´ nad Labem, 400 96 U´stı´ n. L., Czech Republic c Faculty of Science, J.E. Purkyneˇ University in U´stı´ nad Labem, 400 96 U´stı´ n. L., Czech Republic a
Abstract Pure titanium and cerium oxides and their composites were prepared by the modified method of homogeneous hydrolysis with urea as the precipitating agent. The as-synthesized nanostructured oxides were examined by XRD, XPS, microscopic techniques (SEM, HRTEM), nitrogen physisorption, and vibrational spectroscopies (FTIR, Raman). Decontamination ability of the samples towards the toxic organophosphorus compounds was determined by two methods. The reactive adsorption of the warfare agent simulant Dimethyl methylphosphonate (DMMP) was observed by in situ FTIR spectroscopy. The degradation of the pesticide parathion methyl in a liquid medium was investigated by liquid chromatography (HPLC). Nano-ceria exhibited substantially higher degradation ability compared to nano-titania. The highest degradation efficiency was achieved with the composites with Ti:Ce 2:8 and 1:1 molar ratio. The strong interaction of Ti with Ce led to an increase of Ce3+ and formation of Ti
