Green Synthesis of Silver Nanoparticle: Effect of Reaction PH and Temperature

Silver nanoparticles (AgNPs) is known as a particle of silver with size range is varied between 1 to 100 nm. Silver nanoparticles is widely use in biosensor and molecular labelling field. In the synthesis of AgNPs process, it is quite challenging to develop a controlled synthesis procedure in order to get the uniform nano size distribution. In this study, uniform and well-dispersed silver nanoparticles were prepared by a simple and green chemical reduction method. The particles were synthesized via the reduction of silver nitrate by the presence of glucose and ascorbic acid as reducing agent and surfactant, respectively. The reaction pH, temperature and time could contribute to various size and shape of particle which eventually affected the peak of surface plasmon resonance of the particles. Therefore, this research is aimed to get the optimum reaction pH and temperature in order to get the uniform nano size distribution of AgNPs. The resulting AgNPs were characterized by X-ray diffraction analysis, transmission electron microscope and UV-vis analysis. Result from UV-vis showed the absorbance peak was at ~430 nm which corresponding to silver nanoparticles with the morphological of the particle is quasi-spherical with the size is ~30 nm. Based on the result obtained, the result showed that the optimum temperature and reaction pH was achieved at 60 oC with the pH of 7, respectively