Figure 4. FTIR of ZnO nanopowders (a) Sample P1: not annealed and (b) Sample P2: Annealed at 500°C for 3h in air, (c) Sample P3: ZnO nanoparticles obtained after annealing at 500°C 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