Figure 2. SEM images of ZnO nanopowders; Sample P2: annealed at 500°C for 3h with various magnifications: (a) showing formation of nanodiscs (b) Polished surface with hexagonal nanochip shape (c) Policrystallization during growth (d) ZnO growth mode (e) and Sample P#: ZnO nanoparticles obtained after annealing at 500 oC for 4h in air

From

Biosynthesis of Zn5(CO3)2(OH)6 from Arachis Hypogaea Shell (Peanut Shell) and Its Conversion to ZnO Nanoparticles

M.T. Dieng, B.D. Ngom, P.D. Tall, M. Maaza

American Journal of Nanomaterials. 2019, 7(1), 1-9 doi:10.12691/ajn-7-1-1