Application of Nanotechnology: Water Purification Section 3 - Silver Nanoparticles PDF

Application of nanotechnology: water purification: Section (3) silver nanoparticles Institute of Nanoscience and Nanotechnology, Kafrelsheikh University Nanomedicine Nemany A.N.Hanafy; PhD CNR NANOTEC-Istituto di Nanotecnologia,...

Application of nanotechnology: water purification: Section (3) silver nanoparticles Institute of Nanoscience and Nanotechnology, Kafrelsheikh University Nanomedicine Nemany A.N.Hanafy; PhD CNR NANOTEC-Istituto di Nanotecnologia, Lecce, Italy  Fabrication of silver nanoparticles Freshly prepared aqueous solutions containing sodium borohydride NaBH4 and trisodium citrate TSC were mixed and heated to 60 °C for 30 minutes in the dark with vigorous stirring to ensure a homogenous solution. At the end of 30 minutes, AgNO3 solution was added drop-wise to the mixture and subsequently, the temperature was further raised to 90 °C. As the temperature reached 90 °C, the pH of the solution was adjusted to 10.5 using 0.1 M NaOH while heating was continued for 20 minutes, until a change of colour was evident. The nanoparticle suspension was allowed to cool at room temperature. In order to remove the unreacted reductants, AgNP suspensions were centrifuged (12 000 rpm, 15 minutes) and washed thrice, followed by redispersion in DI water and were finally stored at 4 °C for future use. UV Visible Absorbance  Morphology of silver nanoparticles Transmission electron microscopy images of AgNPs at different magnification levels ((a) and (b)—100 nm; (c) and (d)—200 nm).  Zeta measurement Zeta potential plot of the silver nanoparticles  Fourier Transform Infrared Spectrum Fourier transform infrared spectra process.  Acknowledgement THANK YOU FOR YOUR ATTENTION !