Abstract In present investigation green synthesis of tin oxide (SnO2) nanoparticles has been carried out by simple, eco-friendly and low cost process using guava (Psidium Guajava) leaf extract. The as-synthesized SnO2 nanoparticles were characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, Transmission electron microscopy, Field emission scanning electron microscope and Energy-dispersive spectroscopy. The photocatalytic activity of the nanoparticles was analyzed for the photodegradation of reactive yellow 186 dye under sunlight. SnO2 nanoparticles within size range 8–10 nm effectively degraded 90% of the dye within 180 min at a rate constant of 0.00476 min−1.

中文翻译：

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用番石榴叶提取物生物合成氧化锡纳米颗粒用于光催化染料在阳光下的降解

摘要 在目前的研究中，使用番石榴（Psidium Guajava）叶提取物通过简单、环保和低成本的工艺实现了氧化锡 (SnO2) 纳米颗粒的绿色合成。合成的 SnO2 纳米粒子通过紫外-可见光谱、傅里叶变换红外光谱、X 射线粉末衍射、透射电子显微镜、场发射扫描电子显微镜和能量色散光谱进行表征。分析了纳米颗粒的光催化活性，用于在阳光下对活性黄色 186 染料进行光降解。尺寸范围为 8-10 nm 的 SnO2 纳米颗粒在 180 分钟内以 0.00476 min-1 的速率常数有效降解 90% 的染料。