Beijing Key Laboratory of Lignocellulosic Chemistry, Engineering Research Center of Forestry Biomass Materials and Energy, Ministry of Education, Beijing Forestry University, Beijing 100083, China.
Yunnan Provincial Rural Energy Engineering Key Laboratory, Kunming 650500, Yunnan, China.
Int J Biol Macromol. 2023 Dec 31;253(Pt 4):127012. doi: 10.1016/j.ijbiomac.2023.127012. Epub 2023 Sep 19.
Lignin nanoparticles (LNPs) were synthesized using an anti-solvent method and subsequently loaded with manganese dioxide (MnO) via potassium permanganate treatment, resulting in the formation of MnO@LNPs. An extensive investigation was conducted to elucidate the influence of MnO@LNPs on the decolorization of methyl orange solution. The LNPs were successfully obtained by adjusting the preparation parameters, yielding particles exhibited average sizes 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 MnO, which effectively combined with LNPs. Remarkably, the resulting MnO@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.
木质素纳米颗粒（LNPs）采用反溶剂法合成，随后通过高锰酸钾处理负载二氧化锰（MnO），形成 MnO@LNPs。通过广泛研究阐明了 MnO@LNPs 对甲基橙溶液脱色的影响。通过调整制备参数成功获得 LNPs，所得到的颗粒表现出平均粒径在 300 至 600nm 之间，合成过程的产率高达 87.3%，且具有优异的分散特性。值得注意的是，通过降低初始浓度、增加搅拌速率和添加水，LNPs 的尺寸减小。在丙酮-水两相体系中，LNPs 通过π-π 相互作用和氢键力自组装成球形颗粒。高锰酸钾的氧化改性导致纳米级 MnO 的形成，这有效地与 LNPs 结合。值得注意的是，与未改性的 LNPs 相比，所得的 MnO@LNPs 对甲基橙的吸附容量增加了一倍（227mg/g）。该过程遵循 Langmuir 等温吸附模型，且是放热的。
