APPLIED CATALYSIS A-GENERAL
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2020
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IF 5.006
Feng Lin,Yulong Ma,Yonggang Sun,Xiuqin Men,Yingbo Zhu,Tingting Gao,Kanghe Zhao
Strategies for catalytic lignin depolymerization to yield ethylbenzene chemicals are green, sustainable and environmentally friendly methods. In this study, a series of Ni-CeO 2 /H-ZSM-5 catalysts were prepared via the precipitation method, which catalytically degraded the β-O-4 chemical bonding structure to yield ethylbenzene chemicals. The 2-(2-methoxy-phenoxy)-1-phenylethanol substance (β-O-4) was selected as a typical lignin model compound for the investigation of the intrinsic depolymerization mechanism and the catalytic performance. The results demonstrated that the introduced CeO 2 active phase can effectively promote the catalytic conversion of the β-O-4 chemical bonding structure to ethylbenzene chemicals. Physicochemical data demonstrate that the reaction pathways and hydrogenation selectivity were effectively regulated and controlled by the tuning of the dehydration and hydrogenolysis processes via the introduction of CeO 2 , which realized the selective adjustment of the redox properties and the surface valence states of active species in the catalytic process due to its excellent oxygen transfer performance.
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COMPOSITES PART B-ENGINEERING
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2024
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IF 12.7
Yun Dou,Shen Li,Shoujuan Wang,Magdi E. Gibril,Fangong Kong
There are significant issues with commercial separators that must be resolved before they can be used in high-energy-density batteries . These problems include low porosity, poor electrolyte wetting, and low mechanical properties. This study presents a facile method for preparing composite crosslinked hydrogel nanofibers of polyvinyl alcohol (PVA) with 2-acrylamide-2-methylpropanesulfonic acid (AMPS) for lithium-ion battery separators by utilizing methacrylated lignin (LMA) as a bio-based crosslinker . Initially, LMA was synthesized by grafting glycidyl methacrylate (GMA) onto lignin via esterification. Subsequently, a crosslinked hydrogel nanofiber membrane (PVA/AMPS-LMA) was electrospun with varying LMA fractions, which were polymerized by combining free radical copolymerization and esterification reactions. The effectiveness of LMA as a crosslinker was assessed against the N, N′-methylene bisacrylamide (MBA). The study showed that using LMA as a crosslinker significantly improved the membrane's properties. The PVA/AMPS-LMA separator displayed superior features such as mechanical strength , thermal stability, porosity, electrolyte uptake, ionic conductivity , and lithium-ion transference number, when compared with PVA/AMPS, PVA, and Celgard separators. Specifically, the PVA/AMPS-LMA separator demonstrated a high mechanical strength of 24.9 MPa, strong thermal stability at 170 °C with no shrinkage, high porosity (84.3 %), and electrolyte uptake (661.4 %). It also exhibited exceptional ionic conductivity (2.75 mS/cm) and a notable lithium-ion transference number (tLi + = 0.717). In coin batteries, the PVA/AMPS-LMA separator retained over 96 % capacity (142.4 mAh/g) after 200 cycles at 1C. This performance exceeded that of PVA/AMPS, PVA, and Celgard separators, suggesting that PVA/AMPS-LMA separators have the potential to replace their commercial counterparts.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Pengyu Hu,Longwen Lei,Chenglong Fu,Yi Wang,Haiming Li,Xing Wang,Zhiwei Wang,Lan Yao,Yanzhu Guo
Lignin-based CDs with fluorescence and oxidase-like activity were designed firstly • Synergistic engineering of rich graphitic N and large sp 2 domains narrows bandgap • Relationship of structure and visible light-driven oxidase-like activity was revealed • A ratiometric colorimetric/fluorescent system for nitrite detection was constructed Renewable lignin-derived carbon dots with oxidase activity are potential sustainable alternatives for natural enzymes, but their weak visible-light absorption fundamentally inhibits triggering their oxidase-like activity. Herein, we successfully engineered N-doped lignin carbon dots (LCD MA ) with superior visible-light harvesting capacity via enlarging their conjugated sp 2 domain size and graphitic N content. Owing to the synergistic effect of these structures, the bandgap of LCD MA was narrowed to 3.241 eV, which efficiently extended its visible absorption range to 500 nm, and red-shifted its fluorescent light to green region. The superior visible absorption endowed LCD MA with outstanding oxidase-like activity via boosting the generation of photogenerated electrons, which drove the reduction of O 2 to • O 2 − . The LCD MA exhibited a rapid catalytic rate (V max = 21.64 × 10 −5 mM s −1 ) and strong affinity (K m = 0.70 mM) for 3,3′,5,5′-tetramethylbenzidine. Owing to the catalytic activity and green fluorescence of LCD MA , we constructed a ratio-metric colorimetric and fluorescence dual-mode solution system for nitrite detection in the linear range of 2–250 μM, whose detection limits were as low as 0.85 μM and 1.60 μM, respectively. Furthermore, we engineered an all-in-one portable sensing platform by encapsulating LCD MA and TMB into hydrogel for visual and quantitative detection of nitrite through smartphone with a detection limit of 8.95 μM. This study not only provided an effective strategy for rationally engineering sustainable carbon dots with oxidase-like activity from renewable biomass, but also delivered a practical and effective analytical tool for food safety monitoring. Download: Download high-res image (370KB) Download: Download full-size image
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Jianbin Deng,Xiaohan Zhang,Qijun Zhang,Pu Wang,Deyun Li,Tian Hu,Kai Yao,Xiaoyuan Chen,Zhihao Wu,Yulong Zhang
Immobilizing reactive Mg phases within macroscopic hydrogel matrices may couple nutrient mineralization with direct retention of the resulting solid product, but such material-integrated systems remain insufficiently explored. Here, a macroscopic Mg(OH) 2 -loaded lignin hydrogel (Mg(OH) 2 @LH) was developed for nitrogen (N) and phosphorus (P) recovery from simulated digestate. The self-supporting hydrogel contained 115.60 ± 20.90 mg Mg·g −1 while retaining its porous block architecture. For powdered Mg(OH) 2 @LH passed through a 100-mesh sieve, Mg(OH) 2 @LH achieved apparent NH 4 + -N and total phosphorus uptake capacities of 73.99 and 30.99 mg·g −1 , respectively. NH 4 + -N removal varied modestly and non-monotonically with MgCl 2 impregnation concentration, whereas TP removal remained statistically unchanged across the tested preparation range. Nutrient recovery was sensitive to solution pH and N/P stoichiometry. XRD, FTIR, and SEM–EDS analyses supported the formation of a struvite-containing phase during nutrient recovery, while the non-stoichiometric N/P removal indicated contributions from processes other than struvite formation to the decrease in aqueous NH 4 + -N. Importantly, the recovered struvite-containing lignin hydrogel (MAP-LH) retained a centimeter-scale, self-supporting block form and could be directly retrieved from the liquid phase without additional fine-solid separation. Although intact blocks showed lower nutrient uptake than powdered material, this revealed a trade-off between mass transfer and macroscopic retrievability. Subsequent acidic-soil column experiments showed that MAP-LH resulted in a 53.3% lower cumulative TN leaching ratio than soluble N–P fertilizer and partially alleviated soil acidity. These results demonstrate a retrievable hydrogel architecture that integrates Mg-phase immobilization, nutrient recovery, macroscopic product retention, and post-recovery soil application. Download: Download high-res image (261KB) Download: Download full-size image
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ChemSusChem
·
2026
·Vol. 19
·期 10
·e70719
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IF 5.9
Yue Zhao,Qinghua Zhao,Zhe Sun,Kuiyuan Cao,Gang Sun,Yongwei Han,Zhong Sun,Xixin Duan
The selective preparation of vanillin (Van) and ethyl vanillate (EV) remains a major challenge in depolymerizing lignin. Larch lignin is full of coniferyl alcohol unit, which is preferred to produce Van and EV. In this study, the counterions in H 5 PMo 10 V 2 O 40 were replaced with different metal ions (Cu 2+ , Fe 3+ , and Co 2+ ) to develop the modified polyoxometalates, which were then combined with alkaline ionic liquid (IL) to construct a multiactive catalyst possessing acidic, basic, and oxidizing properties. The incorporation of Cu significantly enhanced the cleavage of C–C and C–O bonds in larch lignin at 160°C for 6 h in an ethanol/water/H 2 O 2 system. Under these conditions, the total yield of monophenol reached 15.62 wt%, Van and EV were dominant with the yield of 5.93 and 9.1 wt%, respectively. The fracture of lignin model compounds showed Cu-based polyoxometalates/IL catalysts are effective in selectively preparing EV and Van. The catalyst can be recycled up to 4 times with excellent stability and recoverability. This study provides a more effective strategy for converting waste biomass into valuable platform chemicals. Graphical The figure illustrates the conversion process of larch lignin being depolymerized into high-value monophenolic products, with vanillin (5.93 wt%) and ethyl vanillate (9.1 wt%), under the mediation of a Cu 2+ -substituted H 5 PMo 10 V 2 O 40 polyoxometalate combined with an alkaline ionic liquid. It visually presents the core pathway for the selective and sustainable valorization of lignin biomass into platform chemicals.
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FOOD RESEARCH INTERNATIONAL
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2026
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IF 8.8
Liuzi Du,Xiaodong Zhai,Xinyang Han,Ke Zhang,Junjun Zhang,Xiaobo Zou,Zhihua Li,Zhikun Yang,Quancai Sun,Ye Peng,Xiaowei Huang
A bilayer TPU film integrating volatile-amine-responsive colorimetric sensing and sustained antibacterial release. • Bromocresol purple/fluorescein enabled dual colorimetric and fluorescent responses over a broad pH range. • Carvacrol/tea tree oil-loaded L/HKUST-1 inhibited both Gram-positive and Gram-negative bacteria. • The film showed reversible responses to NH 3 , DMA, and TMA, while ΔE correlated well with beef TVB-N ( R 2 = 0.9417). • The bilayer film delayed refrigerated beef deterioration by about 4 days and enabled freshness monitoring. A bilayer TPU-based intelligent packaging film integrating colorimetric sensing and antibacterial preservation was developed. The film consisted of a dense cast TPU indicator layer containing a bromocresol purple/fluorescein indicator and an electrospun TPU antibacterial layer loaded with lignin-modified HKUST-1 loaded with carvacrol and tea tree oil. The indicator showed reversible responses to ammonia, dimethylamine, and trimethylamine, with detection limits of 0.37, 0.15, and 0.18 μ M, respectively. Lignin modification improved the aqueous structural retention of HKUST-1, and the electrospun layer exhibited sustained, pH-dependent release of the antibacterial components. Water vapor permeability was further evaluated under both 25 and 4 °C conditions. The film showed antibacterial activity against the four tested bacterial strains ( Escherichia coli , Staphylococcus aureus , Pseudomonas aeruginosa , and Bacillus subtilis ), while its extracts caused no detectable cytotoxicity under the tested conditions. In refrigerated beef, the selected TBF3-T-LH@CT formulation delayed quality deterioration by approximately 4 days and provided visible freshness indication from yellow to orange-red. The color variation correlated well with beef spoilage indicators, supporting visual freshness monitoring. These results demonstrate the potential of the bilayer film for intelligent active food packaging. Download: Download high-res image (212KB) Download: Download full-size image
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ADVANCED POWDER TECHNOLOGY
·
2022
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IF 4.969
Linlin Cui,Hanping Xu,Yingrui An,Mincai Xu,Zijie Lei,Xiaojuan Jin
This work reports a three-dimensional N, S co-doped lignin-based carbon microsphere/graphene composite hydrogel (GH-NSCMS) as an electrode material for supercapacitors and a signal enhancement material for tetracycline molecularly imprinted electrochemical sensors (MIECS). As a supercapacitor electrode, GH-NSCMS electrode has a specific capacitance of 434.6 F g −1 at 0.5 A g −1 , which can still maintain 94.15% after 5,000 cycles. In addition, a highly sensitive MIP electrochemical sensor for tetracycline detection is prepared based on GH-NSCMS composite material due to the synergistic effects of the high recognition accuracy of the imprinting method, and excellent conductivity of the composite hydrogel material. The sensor has a wide linear range (0.1–50 μM) and a significant detection limit (5 × 10 −8 mol L −1 ). Therefore, the 3D GH-NSCMS composites described herein have potential application prospects in supercapacitor electrode materials and tetracycline molecular imprinting detection.
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RENEWABLE ENERGY
·
2021
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IF 8.001
Denghao Ouyang,Hongmei Chen,Nan Liu,Jingzhi Zhang,Xuebing Zhao
Oxidative pretreatment of wheat straw with sodium chloride has been used for selective delignification to obtain ideal samples to understand the negative effects of lignin on cellulose accessibility of lignocellulosic biomass . Strong interactive effects has been found between hemicellulose and lignin. To achieve a high enzymatic glucan conversion (EGC) (>80% with 20 FPU/g solid) in the case of high xylan content (25–30%), a moderate degree of delignification (56.3%) with relatively low lignin content (11.9%) is necessary; while in the case of low xylan content (2.6–3.9%), slight removal of lignin by oxidative treatment can well increase cellulose digestibility with a final EGC reaching 90% even that the residual lignin content is as high as 30.9%. Delignification greatly modifies substrate surface morphology with deformation, fracture of cell wall layers and even disappearance of middle lamella. Oxidation also modifies the functional groups and surface properties of lignin, leading to reduction in the inhibitive effects. Phenolic hydroxyl group (Ph-OH) in p -hydroxyphenyl unit has been found to show the strongest inhibition to filter paper activity of cellulase cocktail. Ph-OH exerts stronger inhibition to β -glucosidase than to the endo- and exo-glucanases. Hydrogen bonding and electrostatic interaction are primarily responsible for the inhibitive action of Ph-OH.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Chang-An Xu,Zhencai Qu,Mangeng Lu,Huifa Meng,Bing Chen,Enxiang Jiao,Ending Zhang,Kun Wu,Jun Shi
This paper reports a fresh and robust strategy to develop polyurethane/polysiloxane pressure-sensitive adhesives (PSAs) with excellent properties by replacing part of C5 petroleum resin with modified lignin. A unique aspect of this work is the use of renewable lignin to obtain modified monomers . The phenolic hydroxyl group of lignin is increased by 21.4% after demethylation , which will help to introduce 6-bromo-1-hexene into the lignin structure through Williamson method. The L 3 lignin and C5 petroleum resin are mixed with polyurethane/polysiloxane prepolymer , and furthermore a series of PSAs are obtained under ultraviolet light. It turns out that L 3 lignin can not only replace part of C5 petroleum resin, but also obtain attractive and controllable features. Especially when the mass ratio of C5 petroleum resin to L 3 lignin is 6:4, compared with pure C5 petroleum resin, the 180° peel strength and the shear strength of PU46 are increased by 24.1% and 91.5% respectively. Additionally, the shear strength on the wood substrate is increased by 320.6%. This study provides an effective method for the preparation of high value-added lignin PSA, and expands the application fields of PSA.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
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IF 8.2
Shao-Chao Sun,Shao-Fei Sun,Ying Xu,Jia-Long Wen,Tong-Qi Yuan
Deep eutectic solvents (DESs) have emerged as promising and eco-friendly solvents for the efficient extraction of lignin from biomass due to their low cost and environmental benefits. Nevertheless, the prevalent use of acidic DESs in lignin extraction often results in excessive depolymerization and recondensation of lignin, thereby impeding its downstream applications. In this study, we developed a range of alkaline DESs (ADESs), both pure and peroxide-containing, for the extraction of high-quality lignin from bamboo. Moreover, carbon dioxide (CO 2 ) was employed for the precipitation and regeneration of the extracted lignin. The obtained lignin fractions were comprehensively characterized in terms of yield, purity, morphology, solubility, structural features, and anti-UV/oxidant activity. The results showed that the monoethanolamine-based ADES demonstrated superior performance among the pure ADESs. Structural analysis confirmed the well-preserved substructures of lignin fractions obtained using ADESs, with β-O-4 bond retention ranging from 49.8 % to 68.4 %. The incorporation of a suitable amount of peroxide improved lignin yield, morphology, solubility, and anti-UV/oxidant activity. Additionally, the anti-UV/oxidant activity of lignin exhibited a positive correlation with its phenolic hydroxyl content. This study provides a valuable reference for the green and sustainable production and valorization of lignin within the existing biorefinery framework.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Peixin Li,Yanfang Sun,Lei Nie,Amin Shavandi,Khaydar E. Yunusov,Yinjian Hua,Guohua Jiang
Androgenetic alopecia (AGA) is a transracial and cross-gender disease worldwide with a higher prevalence among young individuals. Traditional oral or subcutaneous injections are often used to treat AGA, however, they may cause severe side-effects and therefore effective treatments for AGA are currently lacking. In this work, to treat AGA, we developed a composite paste system based on minoxidil (MXD)-loaded nanoparticles and valproic acid (VPA) with the assistance of roller-microneedles (roller-MNs). The matrix of composite paste systems is carboxymethyl cellulose (CMC), hyaluronic acid (HA) and polyvinylpyrrolidone (PVP). The roller-MNs can create microchannels in the skin to enhance drug transdermal efficiency. With the combined effects of the stimulation hair follicle (HF) regrowth by upregulating Wnt/beta-catenin of VPA and the mechanical microchannels induced by roller-MNs, the as-prepared composite paste systems successfully boost perifollicular vascularization, and activate hair follicle stem cells, thereby inducing notably faster hair regeneration at a lower administration frequency on AGA mouse model compared with minoxidil. This approach offers several benefits, including the avoidance of efficacy loss due to the liver's first-pass effect associated with oral drug, reduction in the risk of infection from subcutaneous injection, and significant decrease in the side effects of lower-dose MXD.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhenrui Li,Zhihui Wang,Linxin Dai,Jianfeng Ma,Xing’e Liu
A lignin-based Fe/N co-doped carbonaceous catalyst was synthesized via freeze-drying followed by pyrolysis to activate peroxymonosulfate (PMS) for efficient degradation of bisphenol A (BPA). The Fe/N co-doped biochar exhibited a high specific surface area (364.84 m 2 /g), hierarchical porous structures, and abundant oxygen-containing functional groups (hydroxyl and carboxyl groups), which enhancing the dispersion of Fe 3 O 4 nanoparticle and exposure of catalytic site. The Fe 8 -N 10 -C/PMS system achieved 100 % BPA degradation within 20 min with a corresponding first-order reaction rate constant ( k obs ) of 0.4056 min −1 , which outperformed most reported catalysts in efficiency. Quenching and EPR analyses revealed that both free radicals ( • OH, SO 4 •− , and O 2 •− ) and non-radical ( 1 O 2 ) were rate-limiting steps, while graphitic N and Fe-N x structures facilitated direct electron transfer from BPA to PMS in electrochemical tests. XPS results confirmed that pyrrolic N, rather than pyridinic N, played a crucial role in forming the Fe-N x structure. Moreover, the catalyst showed excellent stability, regeneration capability, and adaptability under diverse conditions, highlighting the potential of the Fe-N-C/PMS system for practical wastewater treatment applications.
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