The research work represents the synthesis of silver nanoparticles(AgNPs)coated on magnetic iron oxide nanoparticles by chemical reduction and co-precipitation method,respectively.AgNPs were coated on magnetic ironoxi...The research work represents the synthesis of silver nanoparticles(AgNPs)coated on magnetic iron oxide nanoparticles by chemical reduction and co-precipitation method,respectively.AgNPs were coated on magnetic ironoxide nanoparticles to form Ag@Fe3O4.AgNPs were characterized by UV-Visible spectroscopy.The magnetic nanoparticles(MNPs)and magnetic nanoclusters(MNC)were characterized by Fourier transform infra red(FTIR)spectroscopy.Bulk density,moisture content and ash content were also determined.These MNCs were used for the reduction of 4-nitrophenol(4-NP)and coomassie Brilliant Blue R-250(CBBR-250).The parameters such as effect of time,catalyst dosage,concentration of sodium borohydride and concentration of 4-NP and dye were studied.It was found that the catalytic reduction of 4-NP and dye were in 20 minutes by MNCs.Kinetic analysis shows that the pseudo-first-order was found to be linear.It revealed that the use of these MNCs can be considered as a reliable method for the catalytic reduction studies.展开更多
文摘The research work represents the synthesis of silver nanoparticles(AgNPs)coated on magnetic iron oxide nanoparticles by chemical reduction and co-precipitation method,respectively.AgNPs were coated on magnetic ironoxide nanoparticles to form Ag@Fe3O4.AgNPs were characterized by UV-Visible spectroscopy.The magnetic nanoparticles(MNPs)and magnetic nanoclusters(MNC)were characterized by Fourier transform infra red(FTIR)spectroscopy.Bulk density,moisture content and ash content were also determined.These MNCs were used for the reduction of 4-nitrophenol(4-NP)and coomassie Brilliant Blue R-250(CBBR-250).The parameters such as effect of time,catalyst dosage,concentration of sodium borohydride and concentration of 4-NP and dye were studied.It was found that the catalytic reduction of 4-NP and dye were in 20 minutes by MNCs.Kinetic analysis shows that the pseudo-first-order was found to be linear.It revealed that the use of these MNCs can be considered as a reliable method for the catalytic reduction studies.
