Synthesis of lignin nanoparticle ‑manganese dioxide complex and its adsorption of methyl orange

Int J Biol Macromol. 2023 Sep 19:127012. doi: 10.1016/j.ijbiomac.2023.127012. Online ahead of print.ABSTRACTLignin nanoparticles (LNPs) were synthesized using the anti-solvent method and subsequently loaded with manganese dioxide (MnO2) via potassium permanganate treatment, resulting in the formation of MnO2@LNPs. An extensive investigation was conducted to elucidate the influence of MnO2@LNPs on the decolorization of methyl orange solution. The LNPs were successfully obtained by adjusting the preparation parameters, yielding particles exhibited an average size ranging from 300 to 600 nm, and the synthesis process exhibited a high yield of up to 87.3 % and excellent dispersion characteristics. Notably, LNPs' size was reduced by decreasing initial concentration, increasing stirring rate, and adding water. In the acetone-water two-phase system, LNPs self-assembled into spherical particles driven by π-π interactions and hydrogen bond forces. Oxidation modification using potassium permanganate led to the formation of nanoscale MnO2, which effectively combined with LNPs. Remarkably, the resulting MnO2@LNPs demonstrated a two-fold increase in methyl orange adsorption capacity (227 mg/g) compared to unmodified LNPs. The process followed the Langmuir isotherm model and was exothermic.PMID:37734524 | DOI:10.1016/j.ijbiomac.2023.127012
Source: International Journal of Biological Macromolecules - Category: Biochemistry Authors: Source Type: research