International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jia Hui,Meng Xiang,Jianxiang Chen,Shilong Zhou,Yin Cheng,Zhou Yang
Water splitting is the most feasible way of obtaining hydrogen energy, but the high overpotential of the electrocatalytic materials conventionally used for water splitting create a bottleneck in the process. Herein, we prepare a NiS x /C-780 electrocatalyst derived from lignin and nickel that exhibits good electrocatalytic properties and for which the overpotential of 358 mV at 10 mA cm -2 for the oxygen evolution reaction (OER) and the Tafel slope of 107.7 mV dec -1 are superior to those of commercial RuO 2 . This study serves as a reference for designing low-cost and environmentally friendly electrocatalysts for water splitting.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 1
·176
·
IF 5.719
Tong Luo,Yanping Hao,Chao Wang,Weikun Jiang,Xingxiang Ji,Guihua Yang,Jiachuan Chen,Srinivas Janaswamy,Gaojin Lyu
A novel and effective green system consisting of deep eutectic solvent (DES) was proposed to prepare lignin nanoparticles (LNPs) without any lignin modification. The LNPs are obtained through the dialysis of the kraft lignin-DES solution. The particle size distribution, Zeta potential and morphology of the LNPs are characterized by using dynamic light scattering (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The average diameter of LNPs is in the range 123.6 to 140.7 nm, and the LNPs show good stability and dispersibility in water. The composite beads composed of LNPs and sodium alginate (SA) are highly efficient (97.1%) at removing methylene blue (MB) from the aqueous solution compared to 82.9% and 77.4% by the SA/bulk kraft lignin composite and pure SA, respectively. Overall, the LNPs-SA bio-nanocomposite with high adsorption capacity (258.5 mg/g) could be useful in improving water quality and other related applications.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Shasha Yan,Lanfang Chai,Wei Li,Ling-Ping Xiao,Xiaohong Chen,Run-Cang Sun
Although pH-sensitive lignin-based materials have extensively attracted attentions because of the smart response to pH, it is still a challenge to realize the regulation of the pH-responsive properties. Focusing on this problem, we proposed a new method by tunning the content of hydroxyl groups to adjust the performances of lignin-based hydrogel (L-HG). The modified lignins with the hydroxyl content ranged from 0.31 to 5.91 mmol/g were obtained after acetylation or demethylation . As the results, when increasing the hydroxyl content, the gels became more compact and smooth, and the tensile strength reached 4.10 MPa. The strain was up to 83.2%, and the bending behavior occurred more easily at various pH (3, 5, 9, 11 and 13). While decreasing the hydroxyl content resulted in the impairments of almost all of the above performances. Based on the test of the moisture content, the pH-sensitive bending behavior might be mainly caused by the opposing forces of hydrophilic and hydrophobic interaction. Finally, the application test showed that the trimmed hydrogel could hook up 10 times weight greater than itself under both acid and alkaline conditions. We believe that this work would provide the theoretical guidance for the regulation of pH sensitivity of L-HG.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Lin Si,ZeKun Shi,JiaYi Hou,ChengXia Miao,Qin Hou,Zhixiang Xu,Shiyun Ai
Herein, a facile, environmental-friendly, and sustainable strategy for efficient separation, conversion, and utilization of lignocellulose components was developed. Lignocellulose components were separated by green deep eutectic solvent (DES). The extracted lignin had potential for downstream production of aromatic chemicals and was used to synthesize lignin-doped carbon dots (CDs) in a ratiometric fluorescent probe for detecting biogenic amines (BAs) that were generated from food spoilage. The preparation of CDs provided an efficient strategy to convert biomass waste into carbon-based nanomaterials. This probe exhibited a sensitive, rapid, and linear response to BAs with a low detection limit of 0.045 μM. The retained cellulose with the crystal I structure was used to prepare cellulose nanofibers (CNFs) via oxidation and mechanical treatment. Furthermore, the CNFs were used as a matrix to fabricate CDs/CNFs films for real-time and visual food freshness monitoring. From biomass waste to rational applications, this study not only expanded the comprehensive utilization of lignocellulose in a green and environment-friendly manner but also demonstrated the prospects of CDs-based composite films in on-site monitoring of food quality and safety.
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高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Lishuang Hu,Chunyu Guang,Yang Liu,Zengqiang Su,Shida Gong,Yajing Yao,Yanping Wang
Magnetic lignosulfonate functional materials that were known to remove several types of dye from water effectively were prepared. The surface of an iron (II,III) oxide (Fe 3 O 4 ) sample was coated with a layer of organic carbon , and magnetic lignosulfonate (FCS) was synthesised by a crosslinking agent. The morphology, structure, stability and magnetic properties of the materials were characterised by various testing methods. Under experimental conditions, the solution’s acidity, alkalinity, contact time, temperature, desorption and dye concentration were measured. The experimental results show that the material reached the highest adsorption capacity at pH = 7. In addition, the adsorption data was similar to that of a single layer, Langmuir adsorption model. The maximum adsorption capacities were 198.24 mg g −1 (Congo Red) and 192.51 mg g −1 (Titan Yellow), respectively. Based on its desorption performance, the material had good recyclability . Therefore, these studies could be used in wastewater treatment . Hopefully, the proposed magnetic composites will inspire more scholars to investigate solutions to the problem of contaminated water resources.
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高影响因子
MOLECULES
·
2024
·Vol. 29
·期 8
·1817
·
IF 4.2
Zhihao Tang,Yonggang Yang,Weiqi Wei
Herein, a series of ZnO-doped lignin-based carbons (LC/ZnO) were successfully prepared from different types of lignin and used for methyl orange (MO) photocatalytic degradation. The apparent morphology, internal structure, and photoelectric properties of prepared LC/ZnO composites and their effects on subsequent MO photocatalytic degradation were investigated by various characterization techniques. The results showed that the LC/ZnO composites that were prepared in this work mainly consisted of highly dispersed ZnO nanoparticles and lignin-based carbon nano-sheets, which were beneficial for subsequent photogenerated electrons and holes formation, dispersion, and migration. The MO could be significantly degraded with various ZnO-doped lignin-based carbons, especially over the LCSL/ZnO, and the maximum degradation rate was 96.9% within 30 min under the simulated 300w sunlight exposure. The experiments of free radical elimination showed that the photocatalytic degradation of MO over LC/ZnO were a result of the co-action of multiple free radicals, and h+might play the predominant roles in MO degradation. In addition, the pH of the solution had little effect on MO degradation, and the MO could be effectively degraded even in an alkaline solution of pH = 12.0. The cycling experiments showed that the prepared LC/ZnO had a good stability for MO photodegradation, especially for LCSL/ZnO, even after 5 times recycling, and the degradation rate of MO only dropped from 97.0% to 93.0%. The research not only provided a fundamental theory for the efficient photocatalytic degradation of MO by LC/ZnO composites, but also offered a new insight into lignin valorization.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Liang Wei,Keyu Qu,Jun Huang,Zhe Li,Xianyi Ning,Xiande Yang,Meng Li,Hongxi Zhang,Jing Yang
Lignin, one of the most prevalent organic polymers on Earth, is predominantly produced as a byproduct in the pulp and paper industry and is frequently disposed of as waste, posing substantial environmental challenges. The carbon‑carbon (C C) bonds in lignin are notably stable, complicating catalytic activation and cleavage. This study presents a significant advancement in the visible-light-driven cleavage of lignin's recalcitrant C C bonds (specifically the β-1 type) utilizing mixed-phase TiO 2 (P25) under ambient conditions. In contrast to conventional approaches that emphasize C O bond scission, the P25 catalyst achieves a 93 % conversion rate and 87 % selectivity towards benzaldehyde from 1,2-diphenylethanol without the use of noble metals or complex modifications. Density Functional Theory (DFT) calculations reveal that the rutile {110}/anatase {101} interface lowers the energy barrier for ·O₂ − generation, corroborating experimental selectivity trends. The synergy between these facets facilitates interfacial charge transfer, generating superoxide radicals (·O₂ − ) as the dominant reactive species for C C activation. When applied to native lignin, β-1 and β-β bonds have been completely broken, with over 70 % of β-5 bonds also cleaved. In contrast, only 3 % of β-O-4 bonds were broken, validating scalability beyond model compounds. This work provides a solar-driven, metal-free route to valorize lignin waste, addressing both environmental and energy challenges.
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qi Chen,Wenjie Zong,Qiqi Zhou,Zhengyu Zhou,Yulin Zhan,Qingguo Feng,Chunfeng Hu,Man Jiang
Advanced multifunctional green packaging barrier coating hold profound significance for product preservation and environmental sustainability. Considering the increasing requirement on barrier properties, the lignin nanotubes (LNTs) and polyvinyl alcohol (PVA) were adopted to fabricate coating lamina in this study. The obtained composite barrier coating with 1.0 wt% LNT content presented optimum water vapor transmission rate (WVT) of 12.06 g/m 2 ·24 h, and oxygen transmission rate (OTR) of 0.58 cm 3 /m 2 ·24 h·0.1 MPa, which decreased 57.02 % and 55.38 % respectively compared with pure PVA. The robust hydrogen bonding network between LNT and PVA significantly enhances the composite coating's mechanical properties (38.23 MPa of tensile strength at 2.0 wt% LNT) and thermal stability, which strengthening structure validated by molecular simulations. Crucially, the inclusion of LNT imparts near-complete UV-shielding efficacy and exceptional antimicrobial performance, achieving a 99.30 % inhibition rate against staphylococcus aureus . This composite coating is adaptive for combination with variety base materials in food and medicine packaging, which provides a promising safe and biodegradable barrier coating candidate.
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Zhihao Duan,Hongzhen Cai,Keyan Yang,Jiankang Zhang,Xiangsheng Han
Flexible electric-heating materials (EHMs) with mechanical toughness and stability are in high demand in areas of portable heating elements; however, they are still hard to achieve. Here, strong and tough aramid nanofiber (ANF)/graphene composite membranes were fabricated with the help of interfacial lignin bonding through a noncovalent interaction-triggered “bridging” strategy. The as-prepared membranes (ANF-Lx-Gy) exhibited a maximum mechanical strength of ∼122.5 MPa, a maximum toughness of ∼377.2 MJ/m3, and also promising stabilities in commonly used solvents. Ascribing to the uniform distribution of graphene, the composite membranes presented enhanced conductivity (∼278 S/m) and demonstrated both high efficiency and stability for Joule heating performance (e.g., reaching ∼165 °C under an input voltage of 20 V within 5 s, eventually stabilizing at ∼200 °C, and remaining stable after 12 h of Joule heating). Besides the Joule heating application under low temperatures (e.g., joint worming below 100 °C), the stability of ANF-Lx-Gy also endowed them with favorable performances under high temperatures (e.g., deicing beyond 100 °C). Thus, this work paved a feasible way to develop ANF-based membranes that were strong and stable as flexible EHMs.
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2019
·
IF 3.774
Yun-Peng Zhao,Fa-Peng Wu,Qing-Lu Song,Xing Fan,Li-Jun Jin,Rui-Yu Wang,Jing-Pei Cao,Xian-Yong Wei
In this work, a bimetallic catalyst of Pd and Ni supported on HZSM-5 was designed and evaluated in the hydrodeoxygenation of model compounds representing various C–O bonds in lignin. The effects of temperature, holding time, and initial H 2 pressure on the catalytic performance of the Pd–Ni/HZSM-5 catalyst were investigated. The results indicated that the Pd–Ni/HZSM-5 catalyst exhibited superior catalytic activity towards the conversion of the model compounds to alkanes compared to its monometallic counterparts. Direct cleavage of the C–O bond in DPE was achieved under low H 2 pressure, mainly producing benzene and minor amounts of phenol and cyclohexane, while at high H 2 pressure, the reaction pathway was altered towards hydrogenation of the benzene ring , followed by then cleavage of the C–O bond to afford only cyclohexane. Moreover, the Pd–Ni/HZSM-5 catalyst showed high activities when applying other substrates including anisole, veratrole, guaiacol, benzyloxybenzene, phenethyl phenyl ether, and dibenzyl ether.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2023
·Vol. 17
·期 8
·1085-1095
·
IF 4.5
Qi Yi,Zeng Xuezhi,Xiong Lingyingzi,Lin Xuliang,Liu Bowen,Qin Yanlin
The aromatic properties of lignin make it a promising source of valuable chemicals and fuels. Developing efficient and stable catalysts to effectively convert lignin into high-value chemicals is challenging. In this work, MnFe 2 O 4 spinel catalysts with oxygen-rich vacancies and porous distribution were synthesized by a simple solvothermal process and used to catalyze the depolymerization of lignin in an isopropanol solvent system. The specific surface area was 110.5 m 2 ·g −1 , which substantially increased the active sites for lignin depolymerization compared to Fe 3 O 4 . The conversion of lignin reached 94%, and the selectivity of alkylphenols exceeded 90% after 5 h at 250 °C. Underpinned by characterizations, products, and density functional theory analysis, the results showed that the catalytic performance of MnFe 2 O 4 was attributed to the composition of Mn and Fe with strong Mn-O-Fe synergy. In addition, the cycling experiments and characterization showed that the depolymerized lignin on MnFe 2 O 4 has excellent cycling stability. Thus, our work provides valuable insights into the mechanism of lignin catalytic depolymerization and paves the way for the industrial-scale application of this process.
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高影响因子
FUEL
·
2019
·
IF 5.128
Xiaohua Zhang,Hao Ma,Shubin Wu,Weikun Jiang,Weiqi Wei,Ming Lei
Great effort has been exerted to develop better, more effective fractionation techniques and improve the quality of bio-oil. Water extraction can be regarded as an effective method for bio-oil fractionation. In this study, fractionation of pyrolysis oil into water-soluble (WS) and water-insoluble (WI) phases by water extraction was investigated, and the influence of several factors, including water-to-oil ratio and water temperature, on the performance of the method were evaluated via several analytical techniques. When the water-to-oil ratio was 20:1 and the extraction temperature was 20 °C, polar and non-polar components were enriched in the WS (36.56 wt%) and WI (63.44 wt%) phases, respectively. Although extraction temperature had no significant effect on the properties of WS and WI, the distribution of polar and non-polar components was markedly affected by the dispersion and polarity of the compounds. 2D HSQC-NMR results revealed that side chain structures were more sensitive than aromatic structures to temperature. In view of these findings, an effective energy- and resource-saving extraction method featuring a water-to-oil ratio of 20:1 and extraction temperature of 20 °C is recommended for optimal water fractionation of pyrolysis oil.
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高影响因子
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