Synthesis, characterization and optical properties of La-doped ZnO nanoparticles prepared by precipitation method

摘要

ZnO and La-doped ZnO nanoparticles were synthesized by precipitation method by using Zn(CH_3COO)_2·2H_2O, (CH_2)_6N_4, (PEO)_(128)-(PPO)_(54)-(PEO)_(128) and LaCl_3·H_2O as zinc source, precipitating agent, capping agent and dopant, respectively. The calcined samples exhibited a hexagonal wurtzite structure. The smallest particle size of pure ZnO nanoparticles of about 88 nm was obtained when 0.7 mmol (PEO)_(128)-(PPO)_(54)-(PEO)_(128) was used. The particle size of La-doped ZnO nanoparticles increased when La concentrations increased. The La-doped ZnO nanoparticles showed the energy band gap between 3.159-3.222 eV.