SINTESIS DAN KARAKTERISASI NANOPARTIKEL ZnO MENGGUNAKAN EKSTRAK DAUN KETAPANG UNTUK MENDEGRADASI METILEN BIRU

Abstract

Synthesis and characterization of ZnO nanoparticles have been successfully carried out using ketapang leaf extract to degrade methylene blue. ZnO nanoparticles were formed through the synthesis of a 0.05 M solution of ZnO(NO3)2 with ketapang leaf extract. The synthesis was carried out using variations in the volume of the ketapang leaf extract and zinc nitrate solution, namely A (1:3), B (1:5) and C (1:7) and then 1 M NaOH was added until each variation showed a pH of 12. The results were characterized using UV-Vis Spectrophotometer resulting in absorbance values of 0.619; 1.196 and 1.095. X-ray diffraction (XRD) characterization of sample B showed that the particle size is in the range of 10.59-23.73 nm with Miller indices of (100); (002); (101); (012) ; (110); (013) and (112). SEM characterization showed the presence of nano-flower morphology with size distribution in the range of 400-494 nm. The degradation activity of methylene blue for absorption test using UV-Vis Spectrophotometer at a concentration of 25 ppm with an optimum time of 6 hours resulted in the degradation efficiency of 29 %, 32,2 % and 36,7 %.