AgNPs/lignin aminated polyol/polyvinyl alcohol sponges as efficient recyclable catalysts for organic pollutants degradation
作者：Zhenzhen Zhou, Hongjing Cheng, Juntong Wang, Qiao Zhang, Feipeng Du, Hui Liu*, and Yunfei Zhang*
關鍵字：AgNPs/lignin aminated polyol, polyvinyl alcohol sponges, catalysts
論文來源：期刊
具體來源：Journal of Materials Science
發表時間：2023年
In this study, lignin-aminated polyol (LAP) was synthesised and used to enhance the anchor capability of polyvinyl alcohol (PVA) sponges for silver nanoparticles (AgNPs); the prepared Ag/LAP/PVA sponge was used as efficient and recyclable catalysts for removing harmful organic pollutants 4-nitrophenol (4-NP) and methylene blue (MB). The structural morphology of Ag/LAP/PVA was firstly investigated by SEM with EDS analysis and XRD analysis. Then, the chemical composi-tion of which was characterized by IR spectra, Raman spectra, and XPS analysis. Finally, the catalytic properties of which was tested by Brunauer–Emmett–Teller method and UV–vis spectra. The structural morphology result demonstrated that Ag/LAP/PVA had porous structure and AgNPs were firmly anchored on the wall of sponge and evenly dispersed in the sponge. The chemical composition result of which demonstrated that Ag/LAP/PVA had been successfully prepared and hydroxyl functional groups on LAP and PVA synergistic enhanced the anchoring capacity of LAP/PVA sponges for AgNPs. The catalytic properties result demon-strated that Ag/LAP/PVA had excellent catalytic property for 4-NP and MB reduc-tion, with an apparent rate constant of 0.6082 min-1 and 0.8238 min-1, respectively. Furthermore, Ag/LAP/PVA exhibits excellent catalytic repeatability for 4-NP after 12 consecutive cycles without significant loss of activity. Therefore, the facile, efficient, and recyclable Ag/LAP/PVA catalyst broadens the application of lignin and has enormous potential applications in sewage treatment.