synthesis and characterization of zncao2 nanocomposite catalyst and the evaluation of its adsorption/destruction reactions with 2-cees and dmmp
نویسندگان
چکیده
in this work, zncao2 (zinc oxide-calcium oxide) nanocomposite were synthesized at different temperatures (500-700°c) by sol-gel method based on polymeric network of polyvinyl alcohol (pva). the synthesized samples were characterized by sem/edax, ft-ir and xrd techniques. it was found that synthesized nanocomposites have 1.62, 2.05 and 13.91%wt of cao, respectively. the obtained results show that each particle of nanocomposite has been made of a cao core which is completely covered by zno layers. the smaller average diameter of synthesized nanoparticles (at 600°c) calculated by xrd technique found to be 33 nm for prepared zncao2 nanocomposite. this compound has been used as adsorbing removal for agricultural pesticide. the 2-chloroethyl ethyl sulfide (2-cees) and dimethyl methyl phosphonate (dmmp) are for the class of compounds containing phosphonate esters and sulfurous with the highly toxic that used such as pesticides, respectively. the adsorption/destruction reactions of 2-cees and dmmp have been investigated by using zncao2 nanocomposite. reactions were monitored by gc-fid (gas chromatography) and ft-ir techniques and the reaction products were characterized by gc-ms. the results of gc analysis for the weight ratio of 1:40 (2-cees/dmmp: zncao2 nanocomposite) at room temperature showed that 2-cees molecule is destructed about perfectly in the n-pentane solvent by nanocomposite after 12 hours and it changed to less toxic chemical hydrolysis and elimination products and identified via gc-ms (gas chromatographymass spectrometry) instrument, were hydroxyl ethyl ethyl sulfide (hees) and ethyl vinyl sulfide (evs), respectively. on the other hand, the 31pnmr analysis emphasized that 100% of dmmp molecule after 14 hours in the n-pentane solvent was adsorbed.
منابع مشابه
Synthesis and Characterization of ZnCaO2 Nanocomposite Catalyst and the Evaluation of its Adsorption/Destruction Reactions with 2-CEES and DMMP
In this work, ZnCaO2 (zinc oxide-calcium oxide) nanocomposite were synthesized at different temperatures (500-700°C) by sol-gel method based on polymeric network of polyvinyl alcohol (PVA). The synthesized samples were characterized by SEM/EDAX, FT-IR and XRD techniques. It was found that synthesized nanocomposites have 1.62, 2.05 and 13.91%wt of CaO, respectively. The obtained results show tha...
متن کاملSynthesis and Characterization of ZnCaO2 Nanocomposite Catalyst and the Evaluation of its Adsorption/Destruction Reactions with 2-CEES and DMMP
In this work, ZnCaO2 (zinc oxide-calcium oxide) nanocomposite were synthesized at different temperatures (500-700°C) by sol-gel method based on polymeric network of polyvinyl alcohol (PVA). The synthesized samples were characterized by SEM/EDAX, FT-IR and XRD techniques. It was found that synthesized nanocomposites have 1.62, 2.05 and 13.91%wt of CaO, respectively. The obtained results show tha...
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عنوان ژورنال:
international journal of bio-inorganic hybrid nanomaterialsجلد ۲، شماره ۱، صفحات ۲۸۱-۲۹۳
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