INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
ShiJun Chen,Jianshan Li,Tingsong Xiong,Biao Liu
Lignin, an aromatic biopolymer produced in large quantities as a byproduct of biorefineries, has garnered significant attention for its potential to be valorized into valuable compounds. This demands for the development of an efficient catalyst. This study is the first evaluate the catalytic efficiency of a synthesized Mo-loaded CeO 2 (5Mo/CeO 2 -syn) catalyst for an in-situ upgradation of lignin oil. The 5Mo/CeO 2 -syn catalyst demonstrated exceptional performance, achieving a high lignin liquefaction yield of 66.7 wt%, compared to 48.1 wt% for 5Mo/CeO 2 -com and 35.5 wt% for the non-catalytic (N-cat) reaction. The effects of varying metal loadings and different alcoholic solvents were systematically investigated for kraft lignin (KL) depolymerization. The results of GC–MS and elemental analysis for the bio-oils revealed a significant increase in calorific value (36 MJ/kg, 5Mo/CeO 2 -syn), attributed to the efficient removal of oxygenates. The N-cat bio-oil contained a high proportion of guaiacyl (G-type) phenols (73.4 %), which were significantly reduced during catalytic reactions as they were transformed into alkyl (H-type) phenols. The GPC analysis also evaluated for the lignin and optimum bio-oils, to confirm the breakage of the macro-polymeric structure of lignin into respective monomeric compounds. Moreover, the 5Mo/CeO 2 -syn catalyst was further evaluated across four catalytic cycles, demonstrating its stability and reusability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
·
IF 4.8
Guoning Li,Yu Zhang,Weiyang Ma,Faming Liu,Hui Li
Converting lignin waste into carbon hybrid catalysts for water electrolysis engenders a beneficial scenario for both the valorization of waste carbon resources and the reduction of hydrogen production costs, which remains a grand challenge. Hence, we report a novel lignin-derived carbon hybrid electrocatalyst as a low-cost and highly efficient bifunctional electrocatalyst for overall water splitting, prepared by a feasible strategy involving NaCl-assisted pyrolysis and subsequent oxidation-phosphorization. Notably, this strategy can not only regulate the composition of CoP/CoO x nano-heterostructures but also improve the structural properties of porous carbon matrix. Profiting from superwettable surface, ultrafine Co-based heterojunctions and large active area, the optimal CoP/CoO x -HPC catalyst exhibits exceptional bifunctional catalytic activity in 1 M KOH electrolyte, requiring only small overpotentials of 396 and 522 mV for HER and OER, respectively, to achieve a large current density of 400 mA cm −2 . Meanwhile, the assembled alkali-electrolyzer using CoP/CoO x -HPC as both cathode and anode needs a relatively low voltage of 2.31 V at 400 mA cm −2 , significantly outperforming the commercial couple of Pt/C || RuO 2 . This work can be of value in the design of the low-cost and highly active lignin-derived electrocatalysts and also serve as guidance for the high-value utilization of lignin or even other biomass wastes.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
You Shu,De-Xuan Xiang,Man-Ying Li,Xiao-Ru Xie,Qing-Yao Chen,Yi-Ting Lin,Zhi-Yong Yang,Yue-jun Ouyang,Gui Chen
Lignin is an important organic polymer and a potential renewable resource. In this work, two novel palladium immobilized on lignin-based hypercrosslinked polymers were successfully fabricated via the Friedel-Crafts alkylation reaction and metallization. The protocol is associated with mild conditions, low cost, high yield, easy separation. The structure of the catalysts were studied by FT-IR, N 2 sorption, XPS, ICP, TGA, TEM, and SEM. Analysis indicates that the polymers exhibit significant characteristics such as large pore volume, highly distributed palladium, excellent chemical and thermal stability, and high specific surface areas. Subsequently, the heterogeneous catalysts were deployed within the context of the Suzuki-Miyaura reaction as a means to evaluate their catalytic activity. In the realm of aqueous environments, HCP-L&Pd-I showcases remarkable efficiency in catalyzing the Suzuki-Miyaura reaction, which benefited from the synergistic effect between the hierarchical pore structure in the material and numerous hydroxyl groups in lignin coordinating with palladium. Under optimum conditions, 0.1 mol% Pd content was enough to react with 97 % yield of biphenyl. Moreover, the catalyst was simply regenerated and reused six times without significant activity loss. This protocol perhaps provides a new perspective on the effective preparation of biphenyl aromatic compounds utilizing lignin-based heterogeneous catalysts in the Suzuki-Miyaura reaction.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Zhihao Bi,Bin Lai,Yi Zhao,Lifeng Yan
Lignocellulose is a complex of cellulose, hemicellulose, and lignin, whose overall conversion is still a challenge, especially by a fast and efficient method. Here, a very simple method has been developed using acidic molten salt of zinc chloride hydrate as the solvent and catalyst for complete disassembly of lignocellulose at 95 °C and atmospheric pressure in 12 min. The major products are lignin and monosaccharides, such as glucose and xylose. It was found that high-purity lignin in yield of about 20 wt % can be obtained with various biomass, and the maximum yield of glucose from bamboo is 40.56 wt % and that of xylose from wheat straw is 16.82 wt %. Importantly, zinc chloride can be recovered through precipitation by ammonia and reused for next cycles. It provides a simple route to separate and efficiently convert lignocellulose, especially high-grade feedstock for biorefinery.
✓ 已验证
产品关联
DOI
PubMed
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Haitao Ren,Abdelkader Labidi,Ting Gao,Mohsen Padervand,Xinxin Liang,Chuanyi Wang
Sustainable and green natural lignin raw materials are considered as reliable precursors for large-scale production of carbon quantum dots (CQDs). However, extracting CQDs with ultra-low cytotoxicity and favorable fluorescence properties from lignin remains a challenge. Herein, the bio-waste lignin was converted into crude CQDs by an eco-friendly and rapid microwave pyrolysis approach in just 15 min. The as-obtained CQDs modified with nitrogen-atoms (N-CQDs) display a representative graphite-like structure, strong hydrophilicity, tiny particle size of 6.9 nm, and bright green fluorescence with a quantum yield of approximately 22.2% and fluorescence lifetime of 4.29 ns. Moreover, the N-CQDs exhibit high fluorescence stability under the conditions of a range of pH (5–11), continuous UV irradiation (∼2 h), and NaCl presence with concentrations of 0–1.2 mol/L. More importantly, the N-CQDs show negligible cytotoxicity. Even at the higher N-CQD concentration (300 μg/mL), A549 cells still maintain over 90% activity. The N-CQDs could be utilized for fluorescence imaging in living cells based on the above favorable characteristics. The present work paves the way for the value-added utilization of bio-waste lignin and the production of safe cell imaging agents.
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Yingying Feng,Thomas L. Eberhardt,Fanyang Meng,Chen Xu,Hui Pan
Applications of deep eutectic solvent (DES) systems to separate lignocellulosic components are of interest to develop environmentally friendly processes and achieve efficient utilization of biomass. To enhance the performance of a binary neutral DES (glycerol:guanidine hydrochloride), various Lewis acids (e.g., AlCl 3 ·6H 2 O, FeCl 3 ·6H 2 O, etc.) were introduced to synthesize a series of ternary DES systems; these were coupled with microwave heating and applied to moso bamboo. Among the ternary DES systems evaluated, the FeCl 3 -based DES effectively removed lignin (81.17%) and xylan (85.42%), significantly improving enzymatic digestibility of the residual glucan and xylan (90.15% and 99.51%, respectively). Furthermore, 50.74% of the lignin, with high purity and a well-preserved structure, was recovered. A recyclability experiment showed that the pretreatment performance of the FeCl 3 -based DES was still basically maintained after five cycles. Overall, the microwave-assisted ternary DES pretreatment approach proposed in this study appears to be a promising option for sustainable biorefinery operations.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Yizi Qiu,Yuhan Ai,Weiyu Luo,Shuyao Li,Yimin Chen,Shun Yi,Kaixin Li,Yonggang Min
Selective transformation of lignin and its model compound is an efficient process for the valorization of lignin to valuable biofuels and chemicals. Here a series of Ru-loaded biochar (BC) catalysts from different biomass waste were developed and applied for the hydrolygenolysis of three lignin model compounds and alkaline-treated lignin, providing both maximum sustainability and economical profitability. The BC from bamboo waste with Ru loading (designated as Ru/BABC) was found to exhibit superior catalytic performance among all the carbon catalysts, giving complete conversion of model compounds and selectivities of 80.8 %, 86.0 %, 88.8 % of monocyclic products from diphenyl ether (DPE), benzyl phenyl ether (BPE) and phenethoxybenzene (PPE) respectively. Ru/BABC also exhibited excellent stability as evidenced by the 5-time recycling experiment with minimum Ru leaching. The reaction pathways for the hydrogenolysis of three model compounds were established to reveal the catalytic mechanisms of Ru/BABC and their promotions on the product selectivity. The superiority of Ru/BABC is supposed to result from its excellent porosity, a diversity of functional groups on the support and extremely high adsorption energies for the reactants which are revealed by DFT calculations. This work aims to provide some guidance for the development of BC catalysts from biomass waste, and to shed some clues on the catalytic transformation of lignin into value-added products.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jianfei Li,Qichang Wang,Wenjie Zhang,Kai Zhang,Dekui Shen
The coupling of cobalt and cobalt phosphides has been demonstrated to be an efficient strategy to enhance the catalytic activity for hydrogen evolution reaction (HER). Herein, the lignin-based carbon encapsulated cobalt/cobalt phosphides heterojunctions (Co/Co 2 P@LGC) was synthesized successfully on the lignin-based carbon by carbothermal reduction integrated with post-phosphidation. The strong coupling interaction in the heterostructure promoted the establishment of a distinct synergy effect between Co and P atoms, resulting in the redistribution of electronic structure. The outstanding porous sheet structure of lignin-derived carbon facilitated the exposure of more accessible active sites and self-dopants were conducive to the formation of more carbon defects. As expected, the best catalysts, Co/Co 2 P@LGC-450 exhibited excellent HER performance in 0.5 M H 2 SO 4 , which afford a current density of 10 mA/cm 2 with only 150 mV and a Tafel slope of 86 mV dec −1 , as well as a robust stability for 120 h at 10 mA cm −2 . This research not only presented a facile method for heterostructure electrocatalysts preparation, but also offered crucial insights into the lignin valorisation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2024
·
IF 4.7
Zhang Yimiao,Meng Fuliang,Hu Zhenguo,Jia Yufei,Chen Zeyu,Fei Hongwei,Zhou Dapeng,Yuan Xinhua
In this study, resveratrol was substituted for phenol in different molar ratios (4%, 8%, 12%, 16% and 20%) with lignin, phenol and formaldehyde as raw materials, and a new resveratrol modified lignin-based phenolic resin (R-LPF) with high glass transition temperature ( T g ) and improved mechanical properties was synthesized. The curing behaviors of phenolic resin (PF), lignin phenolic resin (LPF) and R-LPF were investigated. The thermal mechanical properties, thermal stability, comprehensive mechanical properties, frictional properties and morphology were systematically tested and analyzed. The results show that the highest T g of the modified R-LPF reaches 346.2 °C. The T s reaches 231.5 °C, and the residual carbon rate reaches 66.2% at 800 °C. For 12% substitution ratio, the maximum tensile strength, bending strength and impact strength are respective 28.72 ± 1.10 MPa, 57.58 ± 1.95 MPa and 3.14 ± 0.19 KJ/m 2 . Compared with PF and LPF, the tensile strength of R-LPF is increased by 21.5% and 40.4%, and the bending strength is increased by 6.5% and 30.4%, while the impact strength is increased by 38.9% and 58.6%, respectively. The wear resistance is also significantly improved. The modified R-LPF structure has good rigidity, high crosslinking density, excellent mechanical and thermal properties, and it makes up for the defects of system performance decline caused by the introduction of lignin and provides a direction for the development of green high-performance phenolic resin.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiuru Su,Chuan Xu,Jianming Liao,Zhan Liu,Daoheng Liu,Mengting Ye,Long Li,Zhuhan Xu,Shasha Guo,Jun Li
Foam materials hold great promise in construction and packaging applications. However, the non-biodegradability and poor thermal stability of petroleum-based foams present serious environmental and safety concerns. It is crucial to develop sustainable, eco-friendly foam fabrication methods that balance environmental responsibility with high performance. In this study, a novel high-strength, heat-resistant, and water-stable composite foam (FPLs) made from Lignin-based waterborne polyurethanes (LWPUs) and Cellulose fibers, derived from full-component utilization of lychee pruning waste, is introduced. A eco-friendly and simple method utilizing LWPUs crosslinking to fabricate composite foams has been developed, bypassing the need for special drying and ensuring scalability. The FPLs exhibits a high compressive modulus of 455.8 kPa and a yield strength of 191.2 kPa due to the interaction between the LWPUs adhesive and the cellulose fibers. In addition, it demonstrates natural water resistance (maximum contact angle of 122°), exceptional photothermal conversion performance (reaching a peak temperature of 199.7 °C under infrared laser irradiation), superior thermal stability (no deformation up to 250 °C), and insulation performance (thermal conductivity of 0.038 W/mK), while maintaining excellent degradability and recyclability. These materials hold promise as sustainable alternatives to conventional plastic-based foams, providing a viable solution to mitigate the pervasive issue of “white pollution.”
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Ke Su,Chunzhong Wei,Bin Liang,Hualin Huang,Gang Huang,Shiheng Li,Jing Liang,Kai Huang
Divalent cadmium ions in the water environment are a serious threat to human health. The purpose of this study is to develop a biodegradable bio-adsorbent based on bagasse lignin and can effectively adsorb cadmium ions. In this study, it was found that the thiol amino co-grafted lignin nanospheres (TALNPs) had been successfully prepared by the Mannich reaction system, and the performance tests indicate that TALNPs have good adsorption potential. The evaluation experiment shows that factors such as pH value, dosage, time, initial concentration, and temperature significantly affect the ability of TALNPs to adsorb cadmium ions. The simulation calculation of isothermal adsorption experiment shows that the adsorption of cadmium ions follows the Langmuir model, and the adsorption kinetics is pseudo-second order. Compared with unmodified lignin, the ability of TALNPs has increased by about 3.5 times. Using XPS to analyze the structure of TALNPs in the adsorption and desorption process shows that only the bridge bond changes, indicating that it is a relatively stable adsorbent and can be reused. In general, the design strategy of thiol-amino co-grafting to modify lignin nanospheres can enhance the adsorption of cadmium ions, and also provide a new way for the development and utilization of bagasse lignin.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wanyu Li,Jiamin Ye,Zhiwen Jia,Haipeng Yu,Linghao Li,Hong Wang,Enchen Jiang,Yan Sun,Xiwei Xu
Full utilization of biomass after fractionation of its components is an effective way to maximize the value of biomass. Herein, in this study, a new acetal-mediated deep eutectic solvent (DES) was explored and its excellent performance in separating lignin from biomass as well as retarding lignin condensation has been observed. Subsequently, the separated lignin and cellulose-rich residue were used to prepare sunscreen and transparent food indicator films, respectively. The results showed that the acetal-mediated DES pretreatment can reduce the recalcitrance of bagasse, stabilize lignin (β-O-4 content of 68.6% in the lignin), and retain most of the cellulose (ie. 83.43%). Besides, the pretreatment enhanced the subsequent hydrogenolysis of lignin, and the higher β-O-4 content of the lignin contributed to the high yield of aromatic monomers (40.94%). In addition, regenerated lignin was attractive for sunscreen applications due to its lighter color and excellent UV-blocking properties. Furthermore, cellulose smart indicator film was highly sensitive, biodegradable, has excellent physical properties, and allows visual real-time monitoring of seafood spoilage using smartphones. Meanwhile, the yield of the removed hemicellulose converted to xylose in the pretreatment process reached 99.24%. In general, this work proposed a sustainable bio-refinery approach for the full upgrading of biomass.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）