green synthesis of c@fe3o4@ag nanocomposites: coating of silver nanoparticles on the carbon template/magnetite as a catalyst for conversion of toxic carbon monoxide to carbon dioxide

Carbon nano-templates were prepared from walnut shell calcination, then magnetite (fe3o4) nanoparticles were coated on the carbon nano-templates. on the other hand silver (ag) nanostructures were synthesized via a facile green precipitation method applying lactose as green capping agent in solvent of water and were coated on the c@fe3o4 templates. finally toxic carbon monoxide gas was purged from carbon/magnetite/ag nanocomposites. the phase of prepared products were examined by x-ray diffraction pattern (xrd), band gap and optical were measured by uv–visible absorption spectroscopy, the bonds using the (ftir) spectrometry and morphology via scanning electron microscopy (sem). the oxidation behaviour of c@fe3o4@ag nanocomposites was evaluated using the conversion of carbon monoxide to carbon dioxide. the results introduce a relatively easy prepared nanocomposite for solving problem of fatal carbon monoxide.