ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 47
·57822-57831
·
IF 0
Liu Yifan,Xu Zhuangqin,He Yuting,Liu Minghua,Lin Chunxiang,Lv Yuancai
A synergistic photocatalytic system based on Fe-based perovskite with persulfate was constructed for alkali lignin (AL) degradation in pulp and paper wastewater. The degradation performance and mechanism on AL were carried out under ambient temperature and pressure, accompanied by visible light irradiation. The results showed that the synergistic photocatalytic system exhibited much better performance on AL degradation than the single catalytic system. The degradation efficiency reached 73.5% under the optimal conditions and was constant at around 65% over the pH range from 2 to 8. A significant escalation of the AL degradation was observed at pH 10, reaching 80.1%. The photogenerated holes, 1 O 2 and SO 4 − ·, generated by the system were involved in the degradation, and the holes played a dominant role. During the degradation process, the efficient promotion of cleavage events in lignin methoxy, β -O-4 bond, and benzene ring was observed. Consequently, the depolymerization process led to the generation of high-value compounds, namely p -hydroxybenzaldehyde and vanillin. Remarkably, the yields of the high-value compounds in the synergistic photocatalytic system were five times larger than those in the control. This study offered a viable method to activate persulfate for alkali lignin degradation and to achieve a mutually beneficial strategy for wastewater treatment and recycling.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xinya Lou,Huamin Liu,Peiyan Li,Jicai Liang,Ce Liang
A new type of filler was added to epoxy resin to prepare a composite coating with excellent corrosion and weathering resistance. The simple synthesis process and nonpolluting raw materials of this filler contribute to the development of green chemistry. Specifically, lignin was encapsulated in mesoporous silica, the synergistic effect between the two resulted in the formation of lignin/mesoporous silica composite particles (MSN-L) with excellent ultraviolet (UV) resistance. Moreover, MSN-L was incorporated into the epoxy coating to form an excellent barrier against the penetration of corrosive media. The coating was characterized using electrochemical impedance spectroscopy (EIS), contact angle analysis (WCA), confocal laser scanning microscopy (CLSM) and other testing methods. The results show that the epoxy coating doped with 2 wt% MSN-L exhibits good corrosion resistance and excellent surface stability before and after the accelerated aging experiments. The impedance value of the coating was 10 6 Ω•cm 2 and the corrosion current was 10 −4 mA/cm 2 . After UV aging, the surface roughness was 71.3 % lower and the degree of reduction in the water contact angle was reduced by 61.2 % compared to the blank coating. This corrosion and weather-resistant coating significantly extends the service life of outdoor coatings and provides effective protection for metals used outdoors.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuang Qi,Tingwei Zhang,Chaofeng Zhang,Bo Jiang,Caoxing Huang,Qiang Yong,Yongcan Jin
As the most important phenolic biopolymer in nature, lignin shows promising application potentialities in various bioactivities in vivo and in vitro, mainly including antioxidant, anti-inflammatory, hypolipidemic, and antidiabetic control. In this work, several carbon-based solid acids were synthesized to catalyze the fragmentation of organosolv lignin (OL). The generated lignin fragments, with controllable molecular weight and functional groups, were further evaluated for their application in the prevention and treatment of type 2 diabetes mellitus (T2DM). The results suggested that the urea-doped catalyst (SUPC) showed a more excellent catalytic performance in producing diethyl ether insoluble lignin (DEIL) and diethyl ether soluble lignin (DESL). In addition, the lignin fragments have a good therapeutic effect on the cell model of T2DM. Compared with the insulin resistance model, DEIL obtained by catalytic depolymerization of OL with SUPC could improve the glucose consumption of insulin-resistant cells. Moreover, low-concentration samples (50 μg/mL) can promote glucose consumption (19.7 mM) more than the traditional drug rosiglitazone (17.5 mM). This work demonstrates the prospect of depolymerized lignin for the prevention and treatment of T2DM and provides a new application field for lignin degradation products.
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MACROMOLECULAR RESEARCH
·
2025
·
IF 3.4
Liu Jinlong
Traditional lignin-silver nanoparticle hydrogels are often limited by slow gelation (> 3 h), weak mechanical properties, and limited antibacterial efficacy. In this study, we introduce a novel approach by incorporating metal ions (Fe 3+ and Al 3+ ) into lignin-silver nanoparticle (AgNP) composites embedded in an acrylic acid (AA) matrix. This modification significantly enhances the hydrogel's multifunctionality. The presence of metal ions accelerates gelation, enabling rapid formation of highly crosslinked structures within seconds, a notable improvement over conventional lignin-based hydrogels, which typically exhibit slower gelation. Detailed characterization using SEM, FTIR, and XPS analyses reveals that metal ions interact with lignin moieties, inducing redox reactions and coordinating with functional groups, such as phenolic hydroxyl and carboxyl groups. The Fe 3+ -based hydrogel demonstrates potent antibacterial activity, driven by reactive oxygen species (ROS) generation (MIC = 1 mg/mL and MBC = 2 mg/mL against Escherichia coli and Staphylococcus aureus , respectively), while the Al 3+ -based hydrogel shows enhanced mechanical resilience, maintaining 95% recovery after compression. Compared to conventional lignin@AgNPs-AA hydrogels, both hydrogels exhibit remarkable multifunctional properties, including 2.5 × higher compressive strength, 90% DPPH radical scavenging activity, and improved stability. Mechanistic studies highlight distinct antibacterial pathways: Fe 3+ promotes oxidative stress through Fenton reactions, while Al 3 ⁺ disrupts bacterial membranes. This work establishes a rapid, metal-ion-catalyzed approach for the development of lignin-based hydrogels, addressing previous limitations and offering promising applications in wound healing, sensors, and environmental remediation. Graphical abstract
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Dezhe Fan,Fangbao Fu,Shuoyang Qiu,Wenli Zhang,Zhixian Li,Jinhao Huang
The trade-off between specific capacitance and rate performance in hierarchical porous carbons (HPC) hinders their widespread use in supercapacitors. Herein, we report a cost-effective synthesis of HPC with a high specific surface area of 2192 m 2 /g, and interconnected micro-mesopores using industrial lignin via in situ etching and gas exfoliation carbonization process. Investigation shows that when the specific surface area is similar, the mesopore-to-micropore volume ratio (R) is critical for balancing specific capacitance and rate performance. Higher micropore volume (low R) enhances capacitance by providing abundant active sites but impedes ion diffusion and degrading rate performance. Conversely, dominant mesopore volume (high R) facilitates rapid ion transport yet reduces adsorption capacity due to limited active sites. Notably, our optimized HPC with R of 0.62 achieves a remarkable specific capacitance of 354F/g at 0.5 A/g and retains 271F/g (76.6 % retention) at 20 A/g. The symmetric supercapacitor demonstrates outstanding energy-power characteristics (11.9 Wh/kg at 302 W/kg) and long-term cycling stability (97.4 % retention after 10,000 cycles). This work provides a strategy for designing advanced carbon electrode materials and a sustainable pathway for biomass utilization.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Xuan Wei,Qiuhong Bai,Pengtao Zhu,Jiage Ma,Yan Wang,Cong Li,Yehua Shen,Hiroshi Uyama
The easily accessible porous structure and appetency to the electrolyte directly affect the electrochemical properties of carbon electrode materials. Here, a bidirectional pore-creating/regulation and surface modification strategy is proposed to construct functional nitrogen/sulfur-doped lignin-based porous carbon aerogels with hierarchical interconnected porous structure. Firstly, nitrogen and sulfur-rich aerogels containing K 2 CO 3 with an interconnected network structure was prepared by a simple one-pot method. In the pyrolysis process, activated mediates for KOH, thiourea and K 2 CO 3 with different pore-forming functions decomposed, and then hierarchical pore creation and in situ heteroatom doping were accomplished simultaneously in this process. The N, S co-doped porous carbon aerogels showed a high specific surface area (2933 m 2 g −1 ) and a large pore volume (1.87 cm 3 g −1 ). The hierarchical porous structure of the micro-mesoporous interconnects enabled fast ion/electron transport and the ultra-micropores further increased the specific capacitance, N, S-doped (nitrogen content of 1.0 %, sulfur content of 2.4 %) improved hydrophily of carbon materials and enhanced the adsorption capacity of electrolyte ions, resulting in carbon aerogels displayed a high specific capacitance of 330 F g −1 at 0.5 A g −1 . The assembled supercapacitor device showed excellent capacitance retention (81 %) and a high energy density of 10.1 Wh kg −1 . This work provides guidance for rationally designing the pore structure and active surface for supercapacitors carbon electrodes.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuqing Wang,Shuo Tang,Yuting Fu,Xinyuan Feng,Liuyun Jiang,Xiang Hu
Developing multifunctional hydrogel wound dressings that integrate hemostasis, adhesion, antibacterial activity, mechanical robustness, and antioxidant properties remains a significant challenge. This study employed both curcumin and lignin to reduce silver ions in situ while simultaneously incorporating Callicarpa nudiflora into an acrylamide-acrylic acid (AM/AA) hydrogel system. Characterization techniques including FTIR, XRD, XPS, SEM, swelling tests, rheological measurements, and mechanical tests revealed that lignin and curcumin synergistically generate quinone free radicals, promoting the self-gelation of the AA/AM system and resulting in the formation of an Ag@Lig-Cur NPs/C.nudiflora-P (AM-AA) hydrogel. Furthermore, the incorporation of Callicarpa nudiflora and Ag@Lig-Cur NPs modulated both covalent and non-covalent interactions within the P(AM-AA) polymer network, endowing the hydrogel with an ultra-high tensile strain of 2100 %. The hydrogel also exhibited potent antibacterial efficacy, achieving inhibition rates of up to 99 % against both Staphylococcus aureus and Escherichia coli , alongside a remarkable DPPH radical scavenging rate of 90 %, indicating superior antioxidant activity. Notably, the hydrogel demonstrated exceptional hemostatic performance, achieving complete control of hepatic hemorrhage within 30 s of application. In a mouse full-thickness skin defect model, the Ag@Lig-Cur NPs/C.nudiflora-P(AM-AA) hydrogel achieved an exceptional wound healing rate of 98.9 %, highlighting its significant potential as an advanced wound dressing material.
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ChemistrySelect
·
2025
·Vol. 10
·期 32
·e02772
·
IF 2
Dan Zhao,Shunkai Zhang,Weili Yang,Cheng Xue,Guanglite Shen,Wenhui Zhang,Huixia Feng,Nali Chen,Lin Tan
Graphical Through the calculation based on the e-DLVO theory, investigate the aggregation situation of sulfonated phenolic resin in diverse aquatic environments. Plastic waste is widely recognized as a global environmental threat. Nanoplastics (NPs), derived from the degradation of macroplastics and microplastics, pose potential risks to human health. The aggregation behavior of NPs in aquatic systems is primarily governed by electrolyte concentration and pH. In this study, the aggregation behavior of NPs, represented by sulfonated lignin phenolic resin (SLPFR), was systematically investigated in aqueous solutions containing a series of monovalent and divalent electrolytes. Aggregation kinetics experiments, adsorption studies, material characterization, and extended-Derjaguin–Landau–Verwey–Overbeek (e-DLVO) theoretical calculations demonstrated that electrostatic interaction is the dominant force governing the aggregation of SLPFR NPs. Different electrolyte types alter the surface charge of NPs, consequently increasing the electrostatic repulsion and steric hindrance between particles. These findings provide significant insights for better assessing the aggregation of NPs in diverse aquatic environments and their associated environmental impacts and risks.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Juan Yu,Xinyi Zhu,Ru Guo,Bowen Li,Liqin Jiang,Zhiguo Wang,Yimin Fan
Developing lignin–nanocellulose-based solar evaporators is crucial for sustainable seawater desalination, yet challenges remain, including limited photothermal efficiency, weak water transport, and lignin leaching that compromises structural integrity. Herein, a 3D-printed solar evaporator was fabricated by covalently crosslinking alkali lignin (AL) and TEMPO-oxidized cellulose nanofibers (TOCN) via hydroxyl-yne click chemistry using dipropiolate-terminated polyethylene glycol (DA-PEG) as a green crosslinker. The resulting lignin–DA–PEG–nanocellulose (LPNC) inks showed excellent shear-thinning behavior suitable for Direct Ink Writing (DIW), enabling precise fabrication of highly porous, interconnected foams that promoted directional water transport. The optimized LPNC-3 porous foam retained 190.50 ± 31.25 mg AL per 1000 mg TOCN, showing efficient lignin immobilization and structural stability. It exhibited a high water absorption rate (1147.2 ± 65.7 %), strong alkali resistance with minimal lignin leaching (2.2 ± 0.3 %), and enhanced photothermal efficiency with reduced water evaporation enthalpy (1781 ± 50 J·g −1 ). Under 1 sun (1 kW·m −2 ) illumination, the evaporator achieved a high evaporation rate of 1.64 kg·m −2 ·h −1 and 88.09 % solar-to-vapor efficiency. It maintained stable performance over 10 cycles and effectively desalinated artificial seawater to meet WHO standards. This study offers a green and efficient strategy to enhance the durability and performance of lignocellulose-based solar evaporators for practical water purification applications.
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MATERIALS LETTERS
·
2025
·
IF 2.7
Yuan Man,Huang Wenjian,Xie Xinyi,Zhang Xuzhen
This paper investigated modified alkaline lignin for enhancing the crystallization and rheology of polylactic acid (PLA). Alkaline lignin (AL) was acetylated (ACAL) to reduce hydrophilicity and improve compatibility. Bidirectional freezing created oriented structures (FDAL/FDACAL). Results showed that lignin incorporation reduced melt viscosity, improving processability. While all variants influenced crystallization, FDACAL exhibited the most enhancement, as the synergy between acetylation and oriented structure optimized interfacial adhesion and nucleation. Melt properties were tuned by lignin type and structure. This research highlights the importance of synergistic chemical-physical lignin modification for high-performance PLA composites.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2025
·
IF 6.2
Yanlong Jia,Kaina Li,Huixiang Luo,Xueping Song,Ming Wu,Yongjun Yin
A continuous two-stage photothermal catalytic system utilizing titanium oxide nanorods loaded with platinum (Pt/TNR) was developed to facilitate the efficient depolymerization of kraft lignin in an ethanol solution for the production of hydrocarbon fuels. The study demonstrated that the liquid yield increased by 38.6 % with the modified catalyst Pt/TNR compared to the absence of a catalyst. Under moderate conditions (220°C, 8 h), 94.0 % of kraft lignin was converted into liquid yield, achieving a low calorific value of 22.12 MJ/kg—an increase of 5.77 MJ/kg compared to concentrated kraft lignin. Under the conditions of no catalyst, TNR, and Pt/TNR, the corresponding lignin degradation products change from oxygen-containing compounds (carboxylic acids and alcohols), monophenolic compounds, to long-chain hydrocarbons, highlighting the powerful hydrogenation deoxygenation effect of Pt/TNR and its ability to produce liquid fuels with significantly higher hydrocarbon content. This study offers an energy-efficient approach for generating hydrocarbon fuels from kraft lignin.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Zupeng Chen,Yongqi Zhuang,Yuguo Dong,Yanmei Zheng,Wenjun Zhang,Lin Dong
Lignin, the most abundant natural aromatic polymer on Earth, offers a promising feedstock for the production of value-added aromatic products through selective C-C bond cleavage. However, achieving both high product yield and selectivity under mild conditions, such as under visible-light irradiation, remains a significant challenge. In this study, we address this issue by employing ceria (CeO2) as a support to precisely engineer the dispersion of vanadium oxide through two distinct catalyst pretreatment methods: impregnation–calcination (Im-V/CeO2) and physical mixing–calcination (Pm-V/CeO2). The results demonstrate that the Im-V/CeO2 catalyst exhibits superior performance, converting 1,2-diphenylethanol to benzaldehyde with an impressive 89% yield and 98% selectivity, while CeO2 alone yields 52% and Pm-V/CeO2 yields 45%. This enhanced performance of Im-V/CeO2 is attributed to the introduction of low-polymerized vanadium oxide (VOx) species. Unlike highly polymeric V2O5 crystals, these species facilitate the separation of photogenerated electron-hole pairs and reduce charge transfer resistance, thereby improving photocatalytic efficiency. Additionally, the polar nature of VOx species enhances the activation of lattice oxygen, creating more sites for oxygen adsorption and activation. In-depth mechanistic studies reveal that superoxide radicals play a dominant role in the C-C bond cleavage process. This innovative strategy for achieving high-efficiency photocatalytic C-C bond cleavage through the controlled dispersion of vanadium oxide on a cerium oxide support offers valuable insights for the sustainable valorization of lignin.
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