Mixed phase molybdenum oxide (mp-MoO₃) nanocomposite (NC) along with hexagonal (h-MoO₃) and orthorhombic (o-MoO₃) nanoparticles (NPs) were synthesized via easy and cost-effective internal combustion method using water/ethanol mixture, water, and methanol solvents. The formation mechanisms of h-MoO₃, o-MoO₃, and mp-MoO₃ have been investigated using different physical methods such as XRD (X-ray diffraction), FTIR (fourier transform infrared spectroscopy), FESEM (field emission scanning electron microscopy), HRTEM (high resolution transmission electron microscopy, and SAED (selected area electron diffraction). The potential of prepared NPs and NC on the adsorptive removal of methylene blue (MB) was investigated through the adsorption batch process with variation in the adsorbent dosage, pH, and temperature of the solution. The confirmation of dye adsorption over adsorbent surfaces has been elucidated by employing FTIR and FESEM after the adsorption process. The influence of different NPs and NC on the adsorption efficiency indicates the possibility of physical, chemical as well as electrostatic interaction between adsorbent-adsorbate interface. Thermodynamical parameters were calculated and analyzed for the validity of the adsorption phenomenon. Various kinetic study models such as pseudo-first-order (PFO), pseudo-second-order (PSO), and Intra-particle diffusion (IPD) were fitted to the experimental data to explore the rate-controlling step and for understanding the adsorption mechanism. The mp-MoO₃ NC was observed to have the best adsorption efficiency as well as a better adsorption rate. Therefore synthesized mp-MoO₃ NC showed great potential for dye adsorption and would be seen as the futuristic adsorbent materials for sustainable water treatment technology.

混合相氧化钼 (mp-MoO ₃ ) 纳米复合材料 (NC) 以及六方 (h-MoO ₃ ) 和正交 (o-MoO ₃ ) 纳米颗粒 (NPs) 通过简单且经济高效的内燃法使用水/乙醇合成混合物、水和甲醇溶剂。h-MoO ₃、o-MoO ₃和mp-MoO ₃的形成机制计算并分析了热力学参数以判断吸附现象的有效性。各种动力学研究模型，如伪一级 (PFO)、伪二级 (PSO) 和粒子内扩散 (IPD) 都被拟合到实验数据中，以探索速率控制步骤和理解吸附机制。mp-MoO₃ NC 被观察到具有最好的吸附效率以及更好的吸附速率。因此合成的 mp-MoO ₃ NC 显示出巨大的染料吸附潜力，将被视为可持续水处理技术的未来吸附材料。