Tin dioxide (SnO₂) and cobalt and nickel co-doped-SnO₂ (Co,Ni)-SnO₂ nanoparticles (NPs) have been synthesized via aqueous leaf extract of Tradescantia spathacea, which is a phytogenic and green method. The structural, optical and surface morphological studies were analyzed using powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Vis diffuse reflectance spectrophotometer (UV-Vis DRS), Photoluminescence spectroscopy (PL), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and BET. Powder XRD data revealed tetragonal rutile structure of SnO₂ in which the crystallite size was in the range of 13 to 22 nm. The attachment of organic compounds on the surface of NPs was confirmed by FTIR. UV-Vis DRS showed the red-shift to visible light in which the reduction of band gap was confirmed by Valence band X-ray photoelectron spectroscopy (VB-XPS). The PL intensity was reduced indicating the successful incorporation of Co and Ni dopants into SnO₂ lattice. The photoantioxidant activities of the SnO₂ and (Co,Ni)-SnO₂ NPs were enhanced under visible light. Similarly, the photocatalytic conversion of 4-nitrophenol to 4-nitrophenolate ions was also enhanced under the visible light irradiation.

紫茎泽兰的叶片提取物是一种植物性绿色方法，合成了二氧化锡（SnO ₂）和钴镍共掺杂的SnO ₂（Co，Ni）-SnO ₂纳米颗粒（NPs）。使用粉末X射线衍射（XRD），傅立叶变换红外光谱（FTIR），紫外-可见漫反射光谱仪（UV-Vis DRS），光致发光光谱（PL），扫描电子显微镜对结构，光学和表面形态学进行了分析（SEM），X射线光电子能谱（XPS）和BET。粉末XRD数据显示SnO _2的四方金红石结构其中微晶尺寸在13至22nm的范围内。FTIR证实了有机化合物在NPs表面的附着。UV-Vis DRS显示出向可见光的红移，其中通过价带X射线光电子能谱（VB-XPS）证实了带隙的减小。PL强度降低，表明成功地将Co和Ni掺杂剂掺入SnO ₂晶格中。SnO ₂和（Co，Ni）-SnO ₂ NP的光抗氧化活性在可见光下得到增强。同样，在可见光照射下，4-硝基苯酚向4-硝基苯酚盐离子的光催化转化也得到增强。