A novel method was utilized for the synthesis of Tin (IV) oxide nanoparticles using the leaf extract of Carica papaya, Murraya Koenigii, Moringa Oleifera, and Acalypha Indica. The leaf extract acts as an excellent stabilizing, reducing and capping agent for nanoparticles. From XRD analysis, we found that the average crystallite size of SnO₂ nanoparticles was equal to 5 nm (SnO₂–CP), 19 nm (SnO₂–MK), 38 nm (SnO₂–MO), 11 nm (SnO₂–AI). The band gap of the prepared SnO₂ nanoparticles was in the range 2.8–3.1 eV. Further, the green synthesized SnO₂ nanoparticles were tested for degradation of organic pollutant dye namely Rhodamine B in the presence of solar light. The effect of several parameters such as dye concentration, catalyst loading and pH level was studied. The results of optimization showed a maximum removal of color efficiency 86% at pH 8 for 1 × 10^–5 M dye concentration and 100 mg catalysts. The pseudo-first-order kinetics was employed for all the catalysts.

中文翻译：

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绿色合成SnO 2纳米粒子催化罗丹明B的降解

利用番木瓜，木兰，辣木和印度A叶的叶提取物，利用一种新方法合成氧化锡（IV）纳米粒子。叶提取物充当纳米颗粒的极佳稳定剂，还原剂和加帽剂。通过XRD分析，我们发现SnO ₂纳米颗粒的平均微晶尺寸等于5 nm（SnO ₂ –CP），19 nm（SnO ₂ –MK），38 nm（SnO ₂ –MO），11 nm（SnO ₂ –AI）。制备的SnO ₂纳米粒子的带隙在2.8–3.1 eV的范围内。此外，绿色合成的SnO ₂在太阳光的存在下测试了纳米颗粒对有机污染物染料即若丹明B的降解。研究了染料浓度，催化剂负载量和pH值等几个参数的影响。优化结果表明，对于1×10 ^–5  M的染料浓度和100 mg的催化剂，在pH 8下最大去除了86％的色彩效率。拟一级动力学用于所有催化剂。