In this work, silver nanoparticles have been successfully synthesized using simple and environmentally friendly ‘green synthesis’ method using Indonesian wild honey as mediator. Particle count and size can be optimized by varying the silver nitrate precursor and honey concentration, with the help of sodium hydroxide as pH regulator. Based on X-ray diffraction (XRD) result, crystalline structure of Ag has been confirmed in sample with impurities from AgCl. Based on dynamic light scattering (DLS) and transmission electron microscopy (TEM) results, it was found that the smallest average particles size of AgNPs (117.5 nm from DLS and 11.1 nm from TEM) was obtained at sample with 5% w/v of honey and 0.5 mM of AgNO3.
This study shows the effect of Yttrium addition (2-6 wt%) on the mechanical properties and the corrosion resistance of Mg-Y binary fabricated from sacrificial magnesium anode. The beneficial of Mg anode source was tremendous for magnesium alloy especially for corrosion resistance. Improvement of mechanical properties due to the addition of Yttrium was caused by grain refinement solid solution strengthening. Tensile strength increased with the addition of Yttrium. Mg-Y binary is immersed in the SBF solution to see the corrosion resistance. The hydrogen evolution was increased from 0,32 mL/cm2 day, 1 mL/cm2 day, and 34,42 mL/cm2 day for Mg-2%wt Y, Mg-4%wt Y, and Mg-6%wt Y respectively.
Silver nanoparticles (AgNPs) have become interesting metal nanoparticles for filler composite electroactive bone scaffold due to its favorable electrical conductivity, chemical stability, and antibacterial activity. The green synthesis method was selected to produce AgNPs because of using safer solvents, minimizing dangerous reagents, and providing benign response conditions suitable for medical applications. In this study, AgNPs were prepared by a green synthesis approach using Indonesian wild honey with a wider pH range (5, 8, 11). Based on visual observation, UV-Vis spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM) data, increasing pH leads to faster formation of AgNPs and smaller particle size of AgNPs. It was found that the smallest particle size of AgNPs (hydrodynamic diameter is 46.5 nm from DLS result and the actual particle size is 6.3 ± 1.5 nm from TEM result) was generated at pH 11.
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