GREEN CHEMISTRY
·
2024
·
IF 9.3
Si-Yu Zhu,Shi-Chang Liu,Chuan-Xi Zhang,Xin Xin,Zhi-Hua Liu,Lujia Zhang,Bing-Zhi Li,Ying-Jin Yuan
A sustainable lignin bioconversion depends on the exploitation of the inherent aromaticity of lignin for high-value aromatic products. However, the microbial valorization of lignin is hindered by the lack of established bioconversion routes or the inefficient heterologous expression of key enzymes. Here, an efficient biological lignin conversion route was constructed in a microbial cell factory by tapping inherent aromaticity of lignin to produce aromatic natural compound such as homoeriodictyol. The heterologous biosynthesis pathways were successfully constructed to convert lignin-derived monomers to homoeriodictyol in Saccharomyces cerevisiae. The implementation of combinatorial regulating strategies resulted in enhanced CoA supply, suppression of branch pathways, and upregulation of the rate-liming enzymes, which increased the titer of homoeriodictyol by a remarkable 22.5-fold. After that, engineering cofactor supply and recycling led to a substantial 95% increase in homoeriodictyol production. The rational design and modification of the heterologous rate-limiting enzymes achieved substantial improvement in the homoeriodictyol yield. All these strategies together enabled the record homoeriodictyol titer of 3.2 mmol/l from lignin derivatives by S. cerevisiae. Overall, such innovative conversion route meets the atom-economic concept by converting lignin derivatives into valuable flavonoid, paving a green, sustainable way for both the valorization of lignin and the production of aromatic natural products.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Shaomin Kang,Dongming Wang,Mengyu Ma,Jingjing Liu,Xu Wu,Chuankun Xu,Mingxing Shi,Guolin Tong
Porous carbon (PC), characterized by tunable pore structures and high specific surface area (S BET ), is regarded as an outstanding material for supercapacitors (SCs). Notably, exploiting a gentle strategy to build high-yield-high-performance N/S co-doped hierarchical porous carbons (NSHPCs) faces huge challenges. Herein, we introduced a novel strategy to prepare NSHPCs via KNO 3 -assisted C 4 H 4 O 6 K 2 co-activation craft. Thereinto, NH 4 -kraft lignin, gained by precipitating the black liquor with (NH 4 ) 2 SO 4 , was used as precursors, while C 4 H 4 O 6 K 2 served as the main activator and KNO 3 was the assisted-activator/foaming agent. Compared with T -NSHPC activated by single C 4 H 4 O 6 K 2 , N - T -NSHPC acquired by KNO 3 -C 4 H 4 O 6 K 2 co-activation achieved 31.2 % high yield and unique mesoporous-dominated hierarchical porous structures with a high S BET of 1987.9 m 2 /g, a large pore volume of 1.04 cm 3 /g, 2.40 % N and 2.82 % S, respectively. Electrochemical tests revealed that N - T -NSHPC achieved an outstanding specific capacitance of 338.2 F/g at 0.5 A/g. When assembled as symmetrical SCs, it manifested an impressive energy density of 33.38 Wh/kg at a power density of 500 W/kg. Meanwhile, it retained 98.3 % initial capacitance after 5,000 charge–discharge tests at a high current density of 20 A/g. This insight not only presents a feasible approach to achieve high-value utilization of lignin but also provides a gentle and efficient sight for designing high-yield-high-performance NSHPCs for SCs.
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DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2025
·
IF 5.4
Ying Xu,Shu-Yang Jiang,Shaochao Sun,Xin-Yue Xu,Jialong Wen,Tong-Qi Yuan
Lignin, with its aromatic and phenolic-rich structure, exhibits antioxidant, tyrosinase-inhibitory, and UV-protective properties, but the heterogeneity and dark color of kraft lignin hinder cosmetic use. Herein, a sequential ethanol–acetone organosolv fractionation was developed to improve homogeneity, purity, and appearance. Structural features of the fractions were analyzed by FTIR, XPS, and 2D-HSQC NMR techniques. The acetone-soluble lignin from hardwood kraft lignin (H-AS) showed a higher syringyl-to-guaiacyl (S/G) ratio, enriched methoxyl groups, and abundant C–O bonds, leading to superior antioxidant activity, tyrosinase inhibition, and broad-spectrum UV absorption. Incorporation of 5% H-AS into a commercial SPF 15 sunscreen increased its SPF to 33.7, while antioxidant and tyrosinase-inhibitory activities improved by 19 and 46% (IC50-based), respectively. These findings highlight the structure–function relationship of fractionated kraft lignin and demonstrate its potential as a multifunctional active ingredient for sunscreen formulations, providing a new route for high-value utilization in cosmetics.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Guoli Ma,Dongjie Yang,Wenbin Jian,Xuefeng Yu,Lei Zhong,Wenli Zhang,Xueqing Qiu
Hard carbon is a highly promising anode material for sodium-ion batteries. Lignin, a major biomass resource featuring low cost and high carbon content, serves as an ideal precursor for the preparation of hard carbon. However, its severe aggregation results in a notably small interlayer spacing (<0.38 nm) and few large closed pores (>2 nm) in hard carbon, which limits the improvement of sodium storage performance. In this study, a PTCDA-mediated chemical modification strategy was employed to effectively mitigate the severe aggregation of lignin, developing a modified lignin-derived hard carbon (APHC-c). Benefiting from the large interlayer spacing of 0.402 nm and abundant small closed pores of 1.50 nm, the APHC-c exhibits a capacity of 312 mAh g −1 at 0.05 A g −1 with an initial coulombic efficiency of 87.2 %. Even at a high current density of 5 A g −1 , it retains a capacity of 212 mAh g −1 , representing a 40 % improvement compared to the unmodified lignin-derived hard carbon. This microstructure regulation strategy not only significantly enhances the rate performance of lignin-derived hard carbon but also provides valuable insights for the development of other carbon-based electrode materials.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xu Dong,Liping Chen,Danjie Xu,Jian Zhang,Fang Hu,Qingwei Ping
Considering the non-renewable and non-biodegradable characteristics of conventional petroleum-based plastic films, their widespread use contributes significantly to environmental degradation. This study utilizes a green synthesis citrate-based chemical cross-linking strategy to improve the dispersion of ethanol lignin within the film, thereby promoting the development of a natural, safe, renewable, biodegradable, and environmentally friendly biomass-based functional food packaging material. A novel, multifunctional green food preservation film (ELA x C) was synthesized by employing CMC film as the substrate, ethanol lignin (EL) as the functional agent, and citric acid (CA) as the cross-linking agent. The influence of CA addition on the properties of the film was systematically examined. The results indicated that the ELA 0.2 C film exhibited an optimal elongation at a break of 8.0 %, a tensile strength of 28.49 MPa, and outstanding UV-blocking performance, effectively blocking 100 % of UVB and 99.2 % of UVA radiation. Furthermore, the ELA 0.2 C film exhibits antioxidant properties, gas barrier performance, and biodegradability. This film demonstrates significant potential as a multifunctional cling film for apple slices. Moreover, EL can be directly applied as a functional agent without the need for re-dissolution, thereby offering an innovative pathway for the efficient and environmentally sustainable utilization of lignin.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Afroza Akter Liza,Shihao Wang,Yanchen Zhu,Hao Wu,Lukuan Guo,Yungeng Qi,Fengshan Zhang,Junlong Song,Hao Ren,Jiaqi Guo
This study aimed to explore the synergistic mechanism of lignin chromophore modifications via UV treatment and to analyze the effects of mechanical treatments on LCNF properties for future uses. The procedure involved two steps: first, lignin's chromophore modification via UV illumination, and then the ball milling process was proceeded for 1 h, followed by high-intensity ultrasonic for 15–135 min. Characterization included preserved lignin content percentage, FTIR, UV–vis NMR, and color analysis for UV-modified samples, and to access the influence of mechanical treatment on LCNF samples further yield, zeta potential analysis, XRD, thermogravimetric analysis, atomic force microscopy, and scanning electron microscopy were performed. LCNFs S-120 demonstrated a zeta potential of −21.7 mV, indicating enhanced stability compared to the S-135 sample (−10.95 mV). The S-120 sample also showed the highest yield (74.02 %) and TGA at 391 °C. In XRD analysis, the S-120 sample demonstrated the highest CrI 64.3 %, than the S-15 sample (48.2 %). Preserved lignin in the LCNFs led to a slight reduction in crystallinity across all samples but improved thermal stability for all the prepared LCNFs samples. The UV and ultrasonication improved the homogeneity and durability of the LCNF samples, enabling a process that may be used to industries.
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DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Mingzhu Yao,Baojie Liu,Zhente Cong,Xingcheng Zhu,Liwen Wei,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
Oil-spill issues are an international environmental challenge, and Janus membranes, as a great potential solution, have currently drawn lots of attention. However, the separation flux is still limited by layer structure bridging stability and microporous porosity. Herein, a photo-induced antifouling Janus micro/nano-paper with a microchannel stability was fabricated using multiscale cellulose and lignin nanoparticles (LNPs) with spherical topology via granular bridge strategy for separating oil–water emulsions. The porosity of hydrophobic layer were improved by adding multiscale cellulose and LNPs and enbowed antifouling properties. The antifouling properties of the hydrophilic layer were realized by the introduction of a photo-induced molecular switch. Under interfacial interaction, a unique “hydrophilic-amphiphilic-hydrophobic” longitudinal fluid-directed transport structure was formed under self-propulsion. In addition, a stable granular bridge structure and suitable open pore size were ingeniously integrated given the ordered distribution of spherical LNPs among cellulose. In the field of oil-water separation, it exhibited superior separation efficacy for surfactant-stabilized emulsions (separation efficiency >99 % and 98 %), recurrent and superior antifouling performance. The flux of surfactant-stabilized heavy oil emulsions (O/W and O/W) higher than 6289 and 5499 L × m −2 × h −1 × bar −1 under pumping, which is 100 times higher than commercially available nanofiltration membranes. Particularly, it could effectively separate heavy oil emulsions in an ultrastable manner, flux >5500 and 5750 L × m −2 × h −1 × bar −1 after 10 times cycles. The unique structure design strategy could also open up possibilities of Janus membrane in desalination and directional conveying equipment field.
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高影响因子
Journal of Biomedical Nanotechnology
·
2018
·Vol. 14
·期 9
·1543-1555
·
IF 5.068
Li Yanpeng,Ren Junli,Sun Runcang,Wang Xiaohui
A sensitive and reversible sensing platform based on fluorescent carbon dots (CDs) allowing capture and detection of metal ions is of significance for developing diagnostic probes and in-situ environmental-monitoring. Here, a simple and effective method for converting biomass
lignin into fluorescent CDs is developed. The obtained CDs, with stable fluorescence and excellent water solubility, are fabricated as unique model biosensors to access the metal-induced quenching mechanism. It is demonstrated that selective fluorescence quenching behaviors of lignin CDs are
firstly found related to the valence-state of metal ions. Moreover, a reversible control of CDs fluorescence is realized by introducing reducing agents. This novel biosensor and the approach to quenching mechanism may evoke new insight in designing ions-sensor and monitoring biologic redox
signal.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Huiqi Jin,Haiqiang Shi,Wenchao Jia,Yanning Sun,Xueru Sheng,Yanzhu Guo,Haiming Li,Haidong Sun
The molecular weight is one of the most important factors influencing the utilization of industrial lignin obtained from chemical pulping process. In this paper, a facile operative green solvent system was successfully developed for molecular weight-controllable fractionation of industrial alkali lignin (IAL) at room temperature. The results showed that through adjusting the ratio of water, ethanol and γ-Valerolactone (GVL), the industrial lignin was fractionated into six levels with molecular weight stepwise controllable from low to high. The fractionation is a physical process according to FTIR and 2D-HSQC NMR analysis, and the chemical structure of lignin has not changed. Additionally, the polydispersity of fractionated lignin with higher molecular weight tends to be narrower. The content of hydroxyl and carboxyl group is higher for the fractionated lignin with lower molecular weight, which would be beneficial for the chemical reactivity in the down-stream application.
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高影响因子
ChemistryOpen
·
2019
·Vol. 8
·期 5
·643-649
·
IF 2.205
Boyu Du,Bingyang Liu,Xing Wang,Jinghui Zhou
Graphical Lignin explained : Phosphotungstic acid polyoxometalate catalyst showed high activity in the selective depolymerization of three types of lignin samples to phenolic monomers, and the impact of the structure differences on the distribution of phenolic monomers were well studied. Emphasis was placed on changing the types of lignin samples to control the secondary depolymerization of methoxy groups and greatly improving the selectivity of phenolic monomers. Herein we studied the chemical structure of different types of lignin samples and the potential to prepare phenolic monomers was illustrated by phosphotungstic acid catalysts. Different types of H/G/S lignin components had different structures. The lignin extracted from poplar had the highest molecular weight and β-O-4 aryl ether contents, followed by pine and straw lignin samples. After depolymerization by PTA catalyst, the yields of phenolic monomers detected was 8.06 wt % (poplar), 5.44 wt % (pine) and 4.52 wt % (straw), respectively. Further, the ratios of H/G/S in the phenol monomers were also different, indicating that the S, G and H types structural units were continuously transformed with each other during the reaction. In our study, the change in the types of lignin samples resulted into an improvement of the distribution of phenolic products, and also the selectivity of phenolic monomers significantly.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Daliang Guo,Dinggen Hu,Zhongyu Yan,Kangshuai Yuan,Lizheng Sha,Huifang Zhao,Jianbin Chen,Bei Liu
In order to study the property of lignin-based porous carbon activated by potassium tartrate, the effects of activator types, activator/lignin mass ratio and activation temperature on the surface morphology , specific surface area and pore size distribution of alkali lignin based porous carbon materials were systematically investigated. Meanwhile, the methyl orange adsorption capacity and adsorption kinetics of the lignin-based porous carbon were also evaluated. The N 2 adsorption-desorption experiment results showed that the specific surface area value of lignin-based porous carbon materials activated by potassium tartrate (APC-J), KOH (APC-K), and NaOH (APC-Na) are 947, 1113 and 762 m 2 /g, respectively. Meanwhile, APC-J has a special microporous structure, while the pore structures of APC-K and APC-Na are mainly mesopores . The best specific surface area of lignin-based porous carbon materials was 1911 m 2 /g obtaining from APC-J-2-8 sample (mass ratio 2:1, activation temperature 800 °C). The adsorption experiment of methyl orange (MO) showed that the adsorption kinetics of APC-J-2-8 conformed to the quasi-second-order kinetic model , mainly chemical adsorption . The isothermal adsorption process conforms to the Langmuir adsorption isothermal adsorption model, which is a single molecular layer adsorption, and the maximum adsorption amounts are 526.31 mg/g.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Shuai Wang,Junfeng Feng,Hui Pan
In this work, a nitrogen-doped lignin-derived hierarchical porous carbon material (LDMCN-700–2) was synthesized by a facile and green strategy using alkali lignin as carbon source, melamine as nitrogen source, and KCl as salt template. The as-prepared LDMCN-700–2 possessed unique structural properties such as a large surface area of 1012.5 m 2 ·g −1 , high nitrogen content of 4.5 at%, and hierarchical porous structure with micropores, mesopores and macropores, which endow it with superior electrochemical performance . The electrochemical measurements demonstrated that LDMCN-700 as an electrode material exhibited a high specific capacitance of 245 F·g −1 at 0.5 A·g −1 , as well as excellent cycling stability with 95.7 % capacitance retention after 5000th cyclic voltammetry cycles, indicating its great potential for supercapacitors .
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高影响因子
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