ChemSusChem
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2024
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IF 7.5
Xing Long,Mingzhu Yao,Shaoyan Wang,Chuangqi Ren,Xiao Zhao,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
Separation of lignin by pretreatment is an important step in biomass refining. This study investigated how a novel dicarboxylic acid-based deep eutectic solvent (DES) - choline chloride (ChCl)/malonic acid (MA) - affected the process of separating lignin from poplar. At 140°C for 3.0 h, with a ChCl:MA molar ratio of 1:3.5, the ideal pretreatment conditions are met, and 91.8% lignin was obtained. Even after five DES reuses, the consistent and effective separation efficiency of 77.9% remains unchanged. The hydrolysate contained 92.4% of the recovered lignin, with a purity of 94.6%. Moreover, the regenerated lignin obtained through the new DES pretreatment exhibited a high phenolic hydroxyl content of 1.9 mmol∙g−1 and a low polydispersity index of 1.4. The results showed efficient and selective separation of lignin using the new binary carboxylic acid-based DES pretreatment was achieved. This research offers a novel approach to effectively separate wood fiber biomass and extract valuable lignin.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 3
·494
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IF 4.6
Zhihao Ding,Rui Wang,Guoli Pang,Lili Dong,Tingzhou Lei,Suxia Ren
Porous carbon holds great potential for application in supercapacitors due to its rich pore structure and high specific surface area. In this research, lignin served as the starting material for the production of lignin-derived carbon materials via a carbonization-activation process. The resulting porous carbon materials underwent rigorous characterization using SEM, BET, Raman, XRD, and XPS to uncover their morphological and structural intricacies. Notably, the optimal product, achieved with a mass ratio of lignin to KOH and KCl at 1:2:0.5 and activation temperature at 700 °C, emerges as an excellent electrode material for high-performance supercapacitors. This superior carbon material boasts a remarkable specific surface area of 2730 m2g−1, demonstrating an electrochemical capacitance up to 406 F/g at 1 A/g, its high performance surpasses many existing carbon materials. To further investigate the potential application of ELC in electric double-layer capacitors, the electrochemical properties of ELC in 6 M KOH, 1 M Na2SO4, and 1 M Et4NBF4/PC electrolytes were investigated, the reasons for the differences in ELC’s electrochemical performance in different electrolytes are discussed and analyzed in detail, and the advantages and disadvantages of ELC’s performance in capacitor devices of different systems are compared and analyzed. This was performed to compare the electrochemical performance of ELC and commercial YP-50F capacitor carbon in an electric double-layer capacitor, and to investigate the potential application of ELC.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Jing Fan,Wenzhuo Pan,Mao Guan,Changrong Shi,Kai Li,Liangliang An,Chuanling Si,Yuxin Liu
Lignin, with its complex aromatic structure and numerous oxygen-containing functional groups, has potential as a precursor for gas capture applications. However, enhancing the porosity and adsorption sites in lignin-based adsorbent materials remains a challenge. In this study, we developed nitrogen-dotted lignin-based hypercrosslinked porous organic polymers (QL-HCP-II) and activated carbon (HCP-AC) through a two-step chemical synthesis process and subsequent pyrolytic carbonization, respectively, for CO 2 uptake. Initially, lignin’s phenolic hydroxyl groups were quaternized to introduce nitrogen at a concentration of 2.60 %. This nitrogen-dotted lignin was further crosslinked via Friedel-Crafts alkylation and etherification, increasing QL-HCP-II’s specific surface area from 24.98 m²/g to 75.27 m²/g and raising its maximum thermal degradation temperature from 317.6°C to 481.4°C. The nitrogen and oxygen functionalities in QL-HCP-II facilitated stronger interactions with CO₂, improving CO₂ uptake by 120 %. To enhance its performance, the lignin-based polymer was pyrolyzed and carbonized to produce HCP-AC, an activated carbon with a hierarchical pore structure and both oxygen- and nitrogen-containing functional groups. HCP-AC achieved a specific surface area of 419.21 m²/g, and its CO₂ uptake increased significantly to 97.71 mg/g. This study presents an efficient approach for synthesizing lignin-based materials, offering a promising pathway for sustainable CO₂ capture solution.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Danning Wang,Yuanjie Gu,Long Cheng,Shijing Sun,Weisheng Yang,Shuijian He,Shaohua Jiang,Hongqi Dai,Qinglin Wu,Huining Xiao,Jingquan Han
Traditional electrode materials for supercapacitors often face issues like high toxicity, cost, and non-renewability. To address these drawbacks, biomass-based alternatives are being explored, aligning with green development trends. Herein, carbonized wood (CW) with rich pore structure and redox-active lignin are combined to fabricate an all-wood-based sustainable supercapacitor electrode material. Due to its inherent porous structure, CW provides a larger surface area for accommodating active materials ion, enabling the electrode to achieve a higher lignin loading capacity of 2.82–11.68 mg/cm 2 . Furthermore, the utilization of lignin as a substitute for conventional transition metal-based pseudocapacitor material functionalized CW endows the electrode with exemplary electrochemical performance while guaranteeing the comprehensive sustainability of the electrode. This synergy confers the electrode with exceptional electrical performance, yielding an areal capacitance of 960.7 mF/cm 2 at a current density of 1 mA/cm 2 . The symmetric supercapacitors (SSC) manufactured by this composite electrode can achieve a notable areal energy density of 0.14 mWh/cm 2 and a power density of 15.98 mW/cm 2 , while maintaining an outstanding capacitance retention rate of 81 % after 50,000 cycles at 20 mA/cm 2 . The manufacture of CW-lignin electrode underscores the potential of utilizing renewable biomass resources as alternatives for developing high-performance energy storage applications, thereby reducing negative environmental impacts.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuan He,Haichuan Ye,Haichao Li,Guohua Miao,Yucheng Hu,Xianhai Zeng,Tingting You,Feng Xu
Lignin nanoparticles (LNPs) are gaining attention for their renewability and environmental friendliness in advanced nanomaterials. To establish a new sustainable value chain, it is vital to fully utilize lignin resources and thoroughly examine the effects of LNPs size and structure on performance. Herein, a two-step fractionation scheme is engineered via combining sequential organic solvent fractionation and acid precipitation methods to obtain four lignin fractions (denoted as F1, F2, F3, and F4) with low heterogeneity, suitable hydroxyl content and the syringyl (S)/guaiacyl (G) ratio for LNPs fabrication. Up to 88.7 % of alkali lignin was collected to prepare LNPs, and the LNPs showed controllable sizes (100–500 nm, denoted as F1-LNP, F2-LNP, F3-LNP, and F4-LNP). The size gradually decreased from F1-LNP to F4-LNP with increasing specific surface area of LNPs, contributing to superior antibacterial and antioxidant properties. Notably, a higher S/G ratio with enriched p -hydroxyphenyl (H) units resulted in a smaller size of LNPs, possibly resulting from the greater attraction and larger binding energy between S-S and H-H than G-G. This work gives insights into the full utilization of technical lignin to nano-particles to meet specific performance requirements, which will particularly broaden the commercialization and high-value utilization of lignin.
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Molecular Catalysis
·
2024
·
IF 3.9
Yin Wang,Haihong Xia,Fei Ge,Yanrong Wang,Xiaohui Yang,Jianchun Jiang,Minghao Zhou
The catalytic conversion of 5-hydroxymethylfurfural (5-HMF) to value-added chemicals was quite vital for the conversion and utilization of biomass resources. The development of novel and efficient catalysts was of great significance. In this work, a series of tannic acid doped catalysts (Ni-Co/TA@C) were prepared by hydrothermal self-assembly method using lignosulfonate as a building block and coordinating with metal ions Ni 2+ and Co 2+ . The effects of different preparation conditions and reaction conditions on the performance of the catalysts were investigated, and the optimal conditions for catalytic transfer hydrogenation were also explored. The results showed that the conversion of 5-HMF was 99.97% and the yield of 2,5-dimethyl furan (DMF) was as high as 87.10% with Ni 2 Co/TA@C as catalyst under mild reaction conditions (240 °C, 2 MPa N 2 , 4h). The surface morphology, surface area and composition of the catalysts were characterized in detail. The Ni 2 Co/TA@C catalyst had higher total acidity and larger amount of strong acid sites, which was conducive to highly selective catalytic transfer hydrogenation (CTH) of DMF, and the larger specific surface area also promoted the dispersion and loading of Ni and Co. This study provided some novel findings for the construction of catalysts for biomass conversion.
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IRANIAN POLYMER JOURNAL
·
2024
·
IF 2.4
Shi Liang,Shen Xue,Qi Hongyun,Zhang Xiaomei,Shu Ruiwen
A novel lignin-based magnetic composite was synthesized using a facile method, with epichlorohydrin (ECH) serving as a cross-linker to bond amino-functionalized magnetic nanoparticles (AMNP), polyethyleneimine (PEI), and sodium lignosulfonate (LS). The synthesized composite (AMNP/LS-PEI) was subjected to characterization through multiple analytical techniques, namely FTIR, XRD, BET, TG, VSM, XPS, FE-SEM, EDS, HRTEM, and TEM. Following the synthesis, a thorough investigation was conducted into the composite’s adsorption capabilities for methylene blue (MB) and methyl orange (MO) dyes through batch adsorption, taking into account pivotal factors, including pH, contact time, solution concentration, and temperature. The experimental data suggested that the adsorption of MO and MB onto AMNP/LS-PEI was in good accordance with the Langmuir isotherm model. The AMNP/LS-PEI demonstrated maximum adsorption capacities ( Q max ) of 482.7 mg g −1 for MO and 375.6 mg g −1 for MB, respectively. The MB and MO-adsorption kinetics onto AMNP/LS-PEI closely fit the pseudo-second-order model. Furthermore, the thermodynamic analysis revealed that the adsorption process of dyes onto AMNP/LS-PEI was an endothermic one. Upon six adsorption–desorption cycles, AMNP/LS-PEI demonstrated sustained adsorption capacity, achieving removal rates of 81.3% for MB and 77.1% for MO, respectively. The potential advantage for practical applications lied in its highly selective adsorption capability for mixed solutions of MB and MO. Specifically, at a pH of 4, MO was preferentially adsorbed, whereas at a pH of 8, MB was favored for adsorption. In addition, the adsorption mechanism of AMNP/LS-PEI toward dyes was explored using FTIR and XPS, and was found to be mainly ascribed to the electrostatic interaction, hydrogen bonding interaction, and cation exchange. Graphical abstract
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高影响因子
RARE METALS
·
2025
·
IF 11
Dong Yu-Guo,Kong Wen-Jing,Ma Zhuang,Yang Yong,Wang Ping,Sheng Shi-Xiong,Dong Lin,Gu Xiao-Li,Chen Zu-Peng
The oxidation of lignin model compounds to esters via C–C bond cleavage has attracted considerable attention, as esters could be used as important polymer precursors and pharmaceutical intermediates. However, most studies focus on designing homogeneous or noble metal catalysts and conducting the reactions under basic conditions. Here, we report an efficient process for the C–C bond cleavage of lignin model compounds and selectively producing esters over different shaped CeO 2 (i.e., nanospheres (S), nanorods (R), nanoparticles (P), and nanocubes (C)) under base-free conditions. Specifically, the yield of methyl anisate from the aerobic oxidation of 1-(4-methoxyphenyl)ethanol reaches 77.6% over CeO 2 -S in one hour (91% in 9 h), exhibiting higher performance compared to other evaluated CeO 2 catalysts (6.4%–40.2%). Extensive characterizations and experimental investigations reveal that the density of weak base sites and oxygen vacancies on the CeO 2 surface is positively correlated with the yield of methyl esters. Furthermore, the reaction pathway is investigated, which confirms that 1-(4-methoxyphenyl)ethanol first undergoes two reactions (i.e., etherification and dehydrogenation) to produce intermediates of 1-methoxy-4-(1-methoxy-ethyl)-benzene and 1-(4-methoxyphenyl)ethanone, respectively, followed by a series of functional group transformations to generate the targeted methyl anisate ultimately. Graphical abstract
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yanlin Liu,Wanding Chen,Zhen Yu,Yajin Fang,Xiangyu Zhou,Yi Wang,Zhaobin Tang
The resource and environmental issues caused by discarded plastics make plastic recycling research increasingly urgent. Polyamide, one of the top five general engineering polymers, has yet to be thoroughly explored for its recycling performance or mechanism, particularly for aromatic polyamides. In this study, ferulic acid, a lignin derivative generated from bio sources, was used to synthesize diacids and photoresponsive aromatic polyamides that could be recycled via dual processes and had outstanding thermal and mechanical properties. On the one hand, UV-induced cycloaddition reactions occurred in photoresponsive groups, allowing polyamides to achieve the performance enhancement of the discarded materials by UV enhancement. The hydrolysis of amide bonds under alkaline circumstances, on the other hand, conferred degradability on ferulic acid-based polyamides. In addition, a simple acidification and filtration approach for extracting beginning monomers from degradation solutions was developed, resulting in closed-loop chemical recycling of ferulic acid-based polyamides. This work enriches the raw material library for the preparation of high-performance biobased polyamides and provides new ideas for the development of recyclable polyamides.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Tong Luo,Ji Qi,Juan Yu,Chunpeng Wang,Fuxiang Chu,Jifu Wang
Hydrophobic conductive gels have attracted much attention in underwater sensing as the soft robots and wearable sensors. Among the various methods for preparing conductive gels, UV-initiated polymerization shows advantages of rapid curing and significant energy savings. However, traditional commonly used photoinitiators in UV-initiated polymerization often migrate or diffuse within conductive gels, especially with prolonged use or underwater, posing potential environmental and health risks. Herein, a novel lignin-based macromolecular photoinitiator (L-BF) is first designed by incorporating benzoylformate into the lignin backbone, demonstrating excellent UV absorption, high radical initiation efficiency, and hydrophobicity. Subsequently, hydrophobic eutectogels (HEG) are prepared via UV-initiated polymerization using L-BF as photoinitiator. The HEG shows excellent mechanical properties (toughness of 5.67 MJ m − 3 and strain of 941%) and scarcely L-BF migration underwater. Moreover, the hydrophobic network of L-BF endowed HEG with hydrophobicity (water contact angle exceeds 110°; swelling ratio is <5.8%), superior underwater adhesion (255 kPa), even maintained excellent sensing performance (gauge factor of 4.69), and long-term reproducibility (20 000 cycles) in air and underwater. Validation confirms the potential of HEG as an effective wearable sensor for underwater posture monitoring and communication, advancing the use of lignin and low-migration conductive gels in marine exploration.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yue Chen,Zhongyi Li,Chong Han,Haichao Cao,Xuewen Jian,Hongzhen Sun,Haibing Xiao,Peng Zhang,Xinying Zhao,Nan Zou,Feng Liu,Hongqiang Dong,Daxia Zhang
Lignin-based microcapsules are extremely attractive for their biodegradability and photolysis resistance. However, the water-soluble all-lignin shells were unsatisfactory in terms of rainfall and foliar retention, and lacked the test of agricultural production practices. Herein, a novel microcapsule based on a flexible skeleton formed by interfacial polymerization and absorbed with lignin particles (LPMCs) was prepared in this study. Further analysis demonstrated that the shell was formed by cross-linking the two materials in layers and showed excellent flexibility and photolysis resistance. The pesticide loaded LPMCs showed about 98.68 % and 73.00 % improvement in scour resistance and photolysis resistance, respectively, as compared to the bare active ingredient. The foliar retention performance of LPMCs was tested in peanut plantations during the rainy season. LPMCs loaded with pyraclostrobin (Pyr) and tebuconazole (Teb) exhibited the best foliar disease control and optimum plant architecture, resulting in an increase in yield of about 5.36 %. LPMCs have a promising application prospect in the efficient pesticide utilization, by controlling its deformation, adhesion and release, an effective strategy for controlling diseases and managing plant growth was developed.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Fengxiang Cao,Changjiang Sun,Yecheng Xu,Jianzhang Li,Zhen Fang,Zhuhui Qiao
Soybean protein isolate (SPI), a promising biomass resource to substitute petroleum-based chemicals, has been widely employed to prepare biobased board adhesives due to abundant availability, environmental compatibility, and rich functionality. However, pure SPI-based adhesives exhibit poor mechanical properties and high water absorption, which limit their practical application. In this work, dopamine-functionalized hexagonal boron nitride (PDA-BN) and carboxymethylated lignin (CAL) were introduced to serve as fillers and reinforcers to cross-link with SPI. The wet and dry shear strength of resultant adhesive increased by 172% and 64.3% to 1.58 MPa and 2.07 MPa, respectively, compared to the pure SPI-based adhesive, surpassing the performance of a vast of different SPI-based adhesives. The SPI-based adhesive also demonstrated enhanced water resistance, flame retardancy, and mildew resistance. These improvements can be attributed to the dense covalent and noncovalent intermolecular interactions and improved compatibility between PDA-BN and the SPI matrix.
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危险品化学品经营许可证（带存储）