Spherical polyacrylamide nanoparticles (PAM-NPs) were prepared by inverse emulsion polymerization technique. Polyacrylamide/functionalized-multiwalled carbon nanotubes (PAM/f-MWCNTs) and polyacrylamide/TiO₂ (PAM/TiO₂) nanocomposites were successfully prepared by in situ emulsion polymerization and solution mixing methods to investigate their efficiencies in removal of organic dyes. The super-hydrogel behavior of the prepared nanocomposites proved water absorbance of 3664% and 2996% for PAM/1% f-MWCNT and PAM/10% TiO₂ nanocomposites; respectively. A maximum photodegradation efficiency of 35% was achieved upon using PAM/10% TiO₂ nanocomposite for CR dye removal, while in case of MG dye it reached 76% after 240 min irradiation time. Dye removal efficiency increased as f-MWCNT loading increased and reached maximum values of 49% and 80% for CR and MG dyes, respectively, using PAM/1% f-MWCNT nanocomposite after 240 min irradiation time. Pseudo-second-order kinetic model best fitted the adsorption kinetics behavior which reached maximum rates of 0.0615 and 0.463 for CR and MG dyes, respectively, using PAM/1% f-MWCNT nanocomposite. However, in the case of PAM/10% TiO₂ nanocomposite it was found that adsorption reached maximum rates of 0.552 and 0.571 for CR and MG dyes, respectively. On the other hand, pseudo-first-order kinetic model best described the photodegradation behavior of the prepared nanocomposites with higher degradation rate of 0.0018 and 0.0075 for CR and MG dyes, respectively, using PAM/10% TiO₂ nanocomposite. In this work, the combination of PAM-NPs, prepared by inverse emulsion polymerization, TiO₂ NPs with photocatalytic activity and CNTs with high adsorption activity combined the photocatalytic and absorption activities of these nanoparticles in conjunction with reducing their amounts and diminishing the risk of fine catalyst dispersion in the treated water.

中文翻译：

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用于高效水处理的聚丙烯酰胺杂化纳米复合水凝胶

采用反相乳液聚合技术制备了球形聚丙烯酰胺纳米颗粒（PAM-NPs）。通过原位乳液聚合和溶液混合方法成功制备了聚丙烯酰胺/功能化多壁碳纳米管（PAM / f-MWCNTs）和聚丙烯酰胺/ TiO ₂（PAM / TiO ₂）纳米复合材料，以研究其去除有机染料的效率。制备的纳米复合材料的超水凝胶行为证明，PAM / 1％f-MWCNT和PAM / 10％TiO ₂纳米复合材料的吸水率分别为3664％和296％。分别。使用PAM / 10％TiO ₂时，最大光降解效率达到35％纳米复合材料可去除CR染料，而在MG染料的情况下，经过240分钟的照射后达到76％。染料去除效率随f-MWCNT负载的增加而增加，在240分钟的照射时间后，使用PAM / 1％f-MWCNT纳米复合材料，CR和MG染料的最大值分别达到49％和80％的最大值。伪二级动力学模型最适合吸附动力学行为，使用PAM / 1％f-MWCNT纳米复合材料，CR和MG染料的最大吸附速率分别达到0.0615和0.463。但是，在PAM / 10％TiO ₂的情况下纳米复合材料发现，CR和MG染料的最大吸附率分别为0.552和0.571。另一方面，拟一级动力学模型最好地描述了使用PAM / 10％TiO ₂纳米复合材料制备的纳米复合材料的光降解行为，其中CR和MG染料的降解率分别为0.0018和0.0075 。在这项工作中，通过逆乳液聚合制备的PAM-NP，具有光催化活性的TiO ₂ NP和具有高吸附活性的CNT的组合将这些纳米颗粒的光催化和吸收活性结合在一起，同时减少了它们的数量并降低了细粉的风险。催化剂分散在处理过的水中。