Microwave assisted synthesis of zinc oxide (ZnO) nanoparticles in a noble approach: utilization for antibacterial and photocatalytic activity

摘要

In this study, zinc oxide (ZnO) nanoparticle was synthesized by a novel route of microwave assisted method using ascorbicacid and PVA as capping agent and stabilizing agent. A prominent peak at 378 nm by UV absorption ensured the synthesisof ZnO nanoparticles. The crystalline property revealed that synthesized ZnO nanoparticle is highly crystalline havingwurtzite structure. A significant band at ～ 498 to 557 cm~(−1) in FTIR was assigned to the characteristic stretching modeof Zn–O bond. EDX spectrum showed that ZnO nano particles were composed only with Zinc and oxygen. SEM imagedisclosed that ZnO nanoparticles were spherical in shape with an average particle size of 70–90 nm for the combinedeffect. The antimicrobial and ant-biofilm application of synthesized ZnO nanoparticle was studied against Salmonellatyphi, Klebsiella spp. SK4, E. coli RN89, E. coli (gram-negative) and S. aureus-8a (gram-positive) bacteria and exhibited excellentactivity against the strains. Prepared nanoparticle also found to possess outstanding photocatalytic activity againstmethylene blue degradation under sunlight with a T_(50) and T_(80)value of 71.44 and 165.87 min respectively.