Molybdenum (VI) oxide nanoparticles (α-MoO₃ NPs) were green synthesised using buckthorn leaf extract as the reducing and capping agents. The α-MoO₃ NPs were characterised by thermogravimetric analysis, fourier transforms infrared spectroscopy, X-ray diffraction, field emission scanning, and transmission electron microscopy, energy-dispersive x-ray spectroscopy, and Brunauer–Emmett–Teller surface area analysis. The analyses showed the formation of spherical-shaped α-MoO₃ NPs with ∼50 nm mean crystallite size, 3.825 m² g^-1 surface area, and 0.005 cm³ g^-1 total pore volume. The synthesised α-MoO₃ was then applied for adsorption of Cd (II) from aqueous solutions. Optimisation of various adsorption parameters resulted in complete Cd (II) removal under the conditions: 0.1 g α-MoO₃ dose, 60 min contact time, 50 mg l^-1 initial Cd (II) concentration, pH 7 and 298 K. The experimental results were further assessed using different kinetic, isotherm and thermodynamic models. The data were best described by pseudo-second-order (R² = 0.992) and Langmuir (R² = 0.98) models with a maximum adsorption capacity of 57.5 mg g^-1 at optimum conditions. Thermodynamic results indicated that the adsorption process is feasible, spontaneous, and endothermic in nature. Moreover, upon regeneration and interference results, α-MoO₃ is stable and selective for Cd (II) adsorption in presence of other cations. Upon these results, the biosynthesised α-MoO₃ NPs can be used as a selective adsorbent for the efficient removal of Cd (II) from aqueous media.

使用沙棘叶提取物作为还原剂和封端剂，绿色合成了氧化钼 (VI) 纳米粒子 ( α -MoO ₃ NPs)。所述α -MoO ₃通过热重分析，傅里叶变换红外光谱法，X射线衍射，场发射扫描和透射电子显微镜，能量色散X射线光谱，和布鲁诺-埃梅特-特勒表面积分析的NP进行了表征。分析表明，形成了球形α -MoO ₃ NPs，平均晶粒尺寸约为 50 nm，表面积为 3.825 m ² g ^{-1 ，}表面积为 0.005 cm ³ g ^-1总孔隙体积。然后将合成的α- MoO ₃用于从水溶液中吸附Cd (II)。各种吸附参数的优化导致在以下条件下完全去除 Cd (II)：0.1 g α -MoO ₃剂量、60 分钟接触时间、50 mg l ^-1初始 Cd (II) 浓度、pH 7 和 298 K。实验使用不同的动力学、等温线和热力学模型进一步评估了结果。数据最好用伪二阶 (R ² = 0.992) 和 Langmuir (R ² = 0.98) 模型描述，最大吸附容量为 57.5 mg g ^-1在最佳条件下。热力学结果表明吸附过程是可行的、自发的、吸热的。此外，根据再生和干扰结果，α -MoO ₃在其他阳离子存在下对 Cd (II) 吸附是稳定和选择性的。根据这些结果，生物合成的α -MoO ₃ NPs 可用作选择性吸附剂，用于从水性介质中有效去除 Cd (II)。