Fabrication of SiO2 modified biobased hydrolyzed hollow polymer particles and their applications as a removal of methyl orange dye and bisphenol-A

Abstract A special type of SiO2 grafted biobased hollow polymeric particles was fabricated from biomass trans-anethole (ANE) monomers. The SiO2 NPs were prepared through Stober method and then modified with APTES to generate amino functional groups. The (ANE) monomer and maleic anhydride (MAH) were copolymerized through precipitation polymerization to obtain hollow polymer particles, which were then functionalized with carboxyl groups via the hydrolyzation process. Finally, the biobased hydrolyzed hollow particles (BHHPs) were grafted with the amino-modified SiO2 NPs to obtain SiO2-BHHPs. The SiO2-BHHPs were investigated through SEM, TEM, FT-IR, EDX, and XPS techniques and used as a bioadsorbent. The maximum adsorption capacity toward methyl orange dye (MO) and bisphenol-A (BPA) reached up to 701 and 411mg/g, with pH=2 respectively. The adsorption isotherm and kinetic results indicated that the MO dye and BPA adsorption was best fitted with Langmuir and pseudo-second order models. Meanwhile, the adsorption ability of the prepared particles toward MO dye was checked with the different pH range from 2 to 12. The regeneration performance revealed that the SiO2-BHHPs can be easily recycled and reused. At last, the SiO2-BHHPs based materials may find significant applications as multifunctional adsorbents and can be used further for the separation of pollutants from wastewater.