ABSTRACT

A simple microwave assisted method was employed to synthesiseZnO, SnO₂ and Zn₂SnO₄ nanoparticles (NPs). XRD studies revealed the crystalline formation of ZnO with wurtzite, SnO₂ with rutile and Zn₂SnO₄ with cubic respectively. FESEM showed that the ZnO, SnO₂ and Zn₂SnO₄ NP’s morphology constituted of spindle, spherical and polygonal grains respectively. EDAX, FT-IR, Raman and PL studies have established the composition, the functional groups, phonon modes and the emission behaviour of NP’s respectively. The higher antibacterial activity of Zn₂SnO₄ NPs than the ZnO and SnO₂ is attributed to the effect of composite ions that create oxygen defects to damage the microbe synthesis activity leading to the cell losing their ability of cell division, which may lead to the cell death of the bacteria. Further, Zn₂SnO₄ NPs exhibit appreciable photocatalytic activity and the photocatalytic degradation of methylene blue was increased up to 90.9 % with respective time duration of 120 minutes.

摘要

采用简单的微波辅助方法合成了ZnO、SnO ₂ 和Zn ₂ SnO ₄ 纳米粒子(NPs)。_{XRD研究揭示了ZnO与纤锌矿、SnO 2} 与金红石以及Zn ₂ SnO ₄ 与立方晶的结晶形成。FESEM显示ZnO、SnO ₂ 和Zn ₂ SnO ₄  NP的形貌分别由纺锤形、球形和多边形晶粒构成。EDAX、FT-IR、拉曼和 PL 研究分别确定了 NP 的组成、官能团、声子模式和发射行为。_{Zn 2} SnO ₄具有较高的抗菌活性 NPs比ZnO和SnO ₂ 归因于复合离子的作用，产生氧缺陷，破坏微生物的合成活性，导致细胞失去细胞分裂能力，从而可能导致细菌的细胞死亡。此外，Zn ₂ SnO ₄  NPs表现出可观的光催化活性，在120分钟的时间段内，亚甲蓝的光催化降解率提高了90.9%。