SYNTHESIS AND CHARACTERIZATION OF ZINC OXIDE NANOPARTICLES (NPs) USING SOL-GEL METHOD Selma Yasinta Agasi and Nazriati
Universitas Negeri Malang
Abstract
Abstract. ZnO nanoparticles (NPs) are an interesting material due to its unique properties and it have so many potential in many areas like gas sensor, UV absorption, semiconductor, antibacterial, and photocatalysis. In many times there are many methods of synthesis, like sol-gel method have some adavantages like crystalite size, distribution particle size, morphology shape and monodispersity are easy to control, condition reaction with low temperature, high homogeneity and high purities. High result from sol-gel processing needs some factors for controlling crystal size, distribution particle size, and morphology shape and monodispersity. Variation concentration of NaOH can be effected as the growth of nanomaterial because using NaOH as medium preparation, and can be used as stabilizer, and as a capping agent role to control growth rate for particle size. This research is can be achieved with main steps of: (1) Synthesis with sol-gel method that needs main precursor Zinc acetate dehydrate with adding variation concentration of NaOH, and then drying process in 80 degree Celcius for 1 hours, (2) Characterization for knowing final result of synthesis from XRD, XRF, SEM, UV-Vis DRS, dan FT-IR. Synthesis process can be said successing in XRD test similar with COD database Number. 1011258. Analyze result using SEM showing morphology of nanoparticles ZnO speric particles that agglomerate with distribution monodispersity of surface particles area, and range of particles size within 10-83 nm, and particles size distribution is 41 nm. From XRF analyzes results, showing high peak intensity within 94,25% of oxide compound showing that high percentage of ZnO. In FTIR results, it^s showed in fingerprint area for Zn-O wavenumber within 500 cm^-1. UV-Vis DRS analyzes result band-gap energy with ratio mass between precursor and NaOH are ratio 1:1 have 3,22 eV- ratio 1:2 have 3,12 eV- ratio 1:3 have 3,21 eV, and ratio 1:4 have 3,18 eV.
