γ‐Valerolactone/H₂O‐ Derived Facile Preparation of Lignin‐Based AgNPs to Full Utilization of Lignocellulosic Biomass

Abstract

Lignin-based functional material has become an important way to realize the high-value utilization of lignin. However, the unstable performance limited its practical application, resulting from the inherent heterogeneity and uncertain extraction process of lignin. Here, a coupling process of the preparation of lignin-based silver nanoparticles (AgNPs) and carbohydrate refining was presented to realize the facile and stable preparation of AgNPs from lignocellulose, of which γ-Valerolactone (GVL)/H 2 O was used both as the extraction solvent of lignin and the catalyst for AgNPs synthesis in Ag 2 O/lignin system. The reaction rules and behaviors of AgNPs were systematically studied. Meanwhile, the separation rate of hemicellulose could exceed 90 % and a high-purity cellulose of 95.12 % was obtained. The enzymatic hydrolysis efficiency of residual cellulose from corncob was close to 71 %. The reliability of different biomass sources was also verified. This work provided a potential solution for improving the economic benefits of lignocellulose refining.

UV‐Induced Oxidation Preparation of Multi‐Functional Lignin‐Based AgNPs and its Application for Conductive Coating, Antibacterial Enhancement, and Product Separation

“…First, 16.0 mg of lignin was dissolved in 4 ml of solvent, then 16.0 mg of Ag 2 O was added. The reaction mixture was kept in an oil bath at 50 °C, stirred for 12 h, and then centrifuged at 5000 rpm for 1 minute to remove residual Ag 2 O, the purified lignin‐based AgNPs were obtained in the supernatant [17] …”

“…The lignin‐based AgNPs used in this work were prepared using a method we previously reported [8,17] . γ‐Valerolactone and water were mixed in a volume of 7 : 3 as a solvent.…”

“…The lignin-based AgNPs used in this work were prepared using a method we previously reported. [8,17] γ-Valerolactone and water were mixed in a volume of 7 : 3 as a solvent. First, 16.0 mg of lignin was dissolved in 4 ml of solvent, then 16.0 mg of Ag 2 O was added.…”

“…Compared with the common silver source of AgNO 3 , Ag(NH 3 ) 2 OH has been reported as a highly active silver precursor in the preparation of lignin‐based AgNPs [16] . In addition, we previously reported that the Ag 2 O self‐catalytic reduction of Ag + also showed a good performance [8,17] . However, previous studies have predominantly focused on the green synthesis of silver nanoparticles, with a lack of in‐depth research on the regulation of the properties of AgNPs product properties, particularly the transformation of a singular property into multiple functionalities.…”

“…[16] In addition, we previously reported that the Ag 2 O self-catalytic reduction of Ag + also showed a good performance. [8,17] However, previous studies have predominantly focused on the green synthesis of silver nanoparticles, with a lack of in-depth research on the regulation of the properties of AgNPs product properties, particularly the transformation of a singular property into multiple functionalities. Thus, AgNPs, as a high-value fine chemical, single product properties make their application range limited, leading to resource wastage and increased costs.…”