ABSTRACT Selection of synthesis methods, precursors, concentrations and levels of acidity can affect the shape, size and morphology of a prepared material. In this study, the preparation of ZnO was carried out using the biosynthetic method with the precursor solution of 0.05 M Zinc Nitrate Hexahydrate (Zn(NO3)2‧6H2O) and mediated by pineapple peel extract in various the synthetic acidity…