In this work, we have used Camellia sinensis leaves extract in the synthesis of SnO₂ NPs. The biologically synthesised SnO₂ NPs were combined with reduced graphene oxide (r-GO) to produce SnO₂/r-GO under ultrasonic conditions. The extract-based synthetic method was found to be environmentally safe, less time-consuming, and efficient. According to phyto-chemical screening, the biologically active components such as terpenoids, phyto-sterols, carbohydrates, amino acids, alkaloids, tannins, and flavonoids, respectively, were present in Camellia sinensis leaves extract. Various analytical techniques have been used to investigate the SnO₂/r-GO. FTIR analysis indicated the presence of O-H, CC, Sn-O, Sn-C, etc. bonds on the surface of green and ultrasonically based SnO₂/r-GO. The crystalline nature of SnO₂/r-GO has been confirmed by XRD pattern. Further, the freshly synthesised SnO₂/r-GO has been utilised as a supercapacitor material. The specific capacitances of the cost-effective SnO₂/r-GO were found to be 310.7 F g⁻¹ at an initial scan rate (10 mV s⁻¹) and 267.8 F g⁻¹ at an initial current density (1 A g⁻¹), respectively. The specific energy and specific power were evaluated as 13.3 Wh kg⁻¹ and 160.6 W kg⁻¹ at 1 A g⁻¹, and 4.6 Wh kg⁻¹ and 1606.2 W kg⁻¹ at 10 A g⁻¹, respectively.

在这项工作中，我们在 SnO ₂ NPs的合成中使用了山茶叶提取物。将生物合成的 SnO ₂ NPs 与还原氧化石墨烯 (r-GO) 结合，在超声波条件下产生 SnO _{2 /r-GO。}发现基于提取物的合成方法对环境安全、耗时少且高效。经植物化学筛选，山茶叶提取物中分别含有萜类、植物甾醇、碳水化合物、氨基酸、生物碱、单宁和黄酮等生物活性成分。各种分析技术已被用于研究 SnO ₂/r-开始。FTIR分析表明，绿色和超声基SnO ₂ /r-GO表面存在OH、C C、Sn-O、Sn-C等键。_{SnO 2} /r-GO的结晶性质已通过 XRD 图案得到证实。此外，新合成的 SnO ₂ /r-GO 已被用作超级电容器材料。发现具有成本效益的 SnO ₂ /r-GO的比电容在初始扫描速率 (10 mV s ^-1 )下为 310.7 F g ^-1 ，在初始电流密度 (1 A ^{g -1} )，分别。比能量和比功率被评估为13.3 Wh kg ^-1和160.6 W kg ^-1分别在 1 A g ^-1和 4.6 Wh kg ^-1和 1606.2 W kg ^-1在 10 A g ^-1下。