This work aims at the removal of textile dye namely methylene blue (MB) from an aqueous solution using ZnO nanoparticle loaded flexible polyurethane (PU) foam composite. ZnO nanoparticle loaded PU foams were successfully synthesized by adding ZnO nanoparticles at varying weights (0.1 g, 0.2 g, 0.3 g, 0.4 g and 0.5 g) in the foaming blend. Synthesized foam composites were characterized for bulk density and sol fraction. The cellular morphology of the foams was characterized using Scanning Electron Microscope (SEM). PU foam shows highly porous and open cell structure. Degradation of MB dye from an aqueous model pollutant was carried out using prepared foam composites under UV and solar irradiations. It has been observed that irradiation under solar source degrades MB dye in a short span of time as compared to UV irradiation. The effect of nanoparticle loading, time of irradiation and reuse of foam on MB dye degradation from synthetic waste water was effectively studied. Moreover, experimental data also exhibits first order degradation kinetics and the rate constants were found to be 0.66 h⁻¹ under UV light and 3.07 h⁻¹ in sunlight.

这项工作旨在使用负载ZnO纳米颗粒的柔性聚氨酯（PU）泡沫复合材料从水溶液中去除纺织品染料即亚甲基蓝（MB）。通过在发泡混合物中添加不同重量（0.1 g，0.2 g，0.3 g，0.4 g和0.5 g）的ZnO纳米颗粒，可以成功合成负载ZnO纳米颗粒的PU泡沫。表征了合成的泡沫复合材料的堆积密度和溶胶分数。使用扫描电子显微镜（SEM）表征泡沫的细胞形态。PU泡沫显示出高度多孔和开孔的结构。使用制备的泡沫复合材料在紫外线和阳光照射下，从水性模型污染物中降解MB染料。已经观察到，与UV辐射相比，在太阳能源下的辐射在短时间内降解了MB染料。有效研究了纳米颗粒负载量，辐照时间和泡沫再利用对合成废水中MB染料降解的影响。此外，实验数据还显示出一级降解动力学，发现速率常数为0.66 h^-1在UV光下和3.07ħ ^-1在阳光下。