INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Chao Wang,Xuezhen Feng,Shibin Shang,He Liu,Zhanqian Song,Haibo Zhang
In this work, a class of bio-based hydrogels (LN-NH-SA hydrogel) were prepared from aminated lignin and sodium alginate. The physical and chemical properties of the LN-NH-SA hydrogel were fully characterized using field emission scanning electron microscopy , thermogravimetric analysis , fourier transform infrared spectroscopy , N 2 adsorption–desorption isotherms, and other techniques. LN-NH-SA hydrogels were tested for the adsorption of dyes (methyl orange and methylene blue). The LN-NH-SA@3 hydrogel showed better adsorption efficiency for MB with a maximum adsorption capacity of 388.81 mg·g −1 , a bio-based adsorbent with a high adsorption capacity. The adsorption process followed the pseudo-second-order model and fitted to the Freundlich isotherm equation. More importantly, LN-NH-SA@3 hydrogel maintained 87.64 % adsorption efficiency after 5 cycles. Overall, the proposed hydrogel with environmentally friendly and low cost is promising for the absorption of dye contamination.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Zhanshi Ni,Haobo Bi,Hao Shi,Xiang Liu,Junjian Tian,Yurou Yao,Liqun He,Kesheng Meng,Qizhao Lin
The escalating total amount of industrial solid waste is increasingly taxing the ecological environment. Co-combustion technology is seen as a potential solution to this problem. This study investigated the interaction mechanism and carbon dioxide emissions during the co-combustion process of coal slime and biomass (lignin) using a programmed heating method. The experimental results reveal that the two sub-reaction models effectively depict the combustion process of coal slime. In the co-combustion process, the comprehensive combustion and ignition performance of the mixed fuels surpasses that of coal slime, but the stability of the combustion flame is reduced. The combustion performance of the mixed fuel is primarily influenced by two common factors. The interaction between lignin and coal slime significantly changes with the variation of mixing ratio and heating rate . The main product in the combustion process of mixed fuels is carbon dioxide. Due to the competition for oxygen among volatile matter, the emission of carbon dioxide is lower than the theoretical value. When the mass percentage of lignin is 70 %, the impact on carbon dioxide is most pronounced. The experimental results of this study provide a foundation for understanding the interaction mechanism of coal slime and biomass co-combustion. The research findings also provide theoretical guidance for the safe operation of coal slime and biomass co-combustion equipment.
研究领域:
能源与环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Zong-Pin Fu,Yun-Peng Zhao,Fa-Peng Wu,Jin-Xuan Xie,Le-Le Qiu,Jian Xiao,Jing Liang,Yong-Hui Bai,Fang-Jing Liu,Jing-Pei Cao
The selective hydrogenolysis of C O bonds is critical for the effective valorization of lignin. Herein, we synthesized a series of highly efficient Ni x Co y Al-T catalysts by a coprecipitation-calcination-reduction method and evaluated their catalytic hydrogenolysis performance towards the C O bonds of lignin-derived aryl ether, using isopropanol as the hydrogen donor source. The results revealed that the Ni 0.5 Co 1.5 Al-600 catalyst displayed superior activity and its catalytic performances were strongly influenced by the Ni/Co molar ratios and calcination temperatures. The enhanced dispersion of metal particles and the electron transfer from Ni to Co in Ni 0.5 Co 1.5 Al-600 catalyst facilitated the cleavage of C O bonds in lignin model compounds. Furthermore, the β-benzyl-H atom in 2-phenoxy-1-phenylethanol (PPE) also contributes to the cleavage of C aliphatic -O bonds. Under optimized reaction conditions (180 ℃, reaction time 2 h), PPE was completely converted over the Ni 0.5 Co 1.5 Al-600 catalyst, and the yield of ethylbenzene and cyclohexanol reached 95.91wt% and 85.73wt%, respectively. These findings demonstrate that the Ni x Co y Al-T catalytic system holds great promise for the production of valuable chemicals from lignin under mild conditions.
研究领域:
化学工程
·
可再生资源转化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2022
·
IF 6.437
Zijun Yi,Chao Li,Lijun Zhang,Shu Zhang,Wenran Gao,Shuang Wang,Bin Li,Xun Hu
CO 2 can be used to activate biomass for production of activated carbon at high temperatures (usually above 700 °C). At typical pyrolysis temperatures, CO 2 might also involve in biomass pyrolysis , which was investigated via pyrolysis of lignin at temperatures from 400 to 700 °C in N 2 and CO 2 atomsphere, respectively. The results suggested that CO 2 interfered with the pyrolysis process, facilitating formation of bio-oil and biochar but not gases via suppressing further gasification of volatiles. This reserved more mono-ring phenolics in bio-oil and also formed more heavier phenolics through secondary condensation routes. As for biochar, CO 2 enhanced the aromatization process, generating the carbon-rich biochar of higher heating value . The in-situ characterization of the functionalities of biochar during pyrolysis suggested that CO 2 accelerated removal of the aliphatics like -OH, -C-H, C O, and C-O-C. This rendered the biochar of hydrophobic surface but less fragmentized structures than that obtained in N 2 .
研究领域:
能源与环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Tingting Ding,Ruixia Liu,Xiaofan Yan,Zuoyu Zhang,Fuquan Xiong,Xingong Li,Zhiping Wu
It is a promising idea to graft zwitterionic polymers onto lignin and prepare lignin-grafted-poly [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (Lignin-g-PDMAPS) thermosensitive polymer with the upper critical solution temperature (UCST). In this paper, an electrochemically mediated atom transfer radical polymerization (eATRP) method was used to prepare Lignin-g-PDMAPS. The structure and property of the Lignin-g-PDMAPS polymer were characterized by the fourier transform infrared spectrum (FT-IR), nuclear magnetic resonance (NMR), X-ray electron spectroscopy (XPS), dynamic light scattering (DLS), differential scanning calorimeter (DSC). Furthermore, the effect of catalyst structure, applied potential, amount of Lignin-Br, Lignin-g-PDMAPS concentration, NaCl concentration on UCST of Lignin-g-PDMAPS were investigated. It was worth noting that polymerization was well controlled when the ligand was tris (2-aminoethyl) amine (Me 6 TREN), applied potential was −0.38 V and the amount of Lignin-Br was 100 mg. And the UCST of the Lignin-g-PDMAPS aqueous solution (1 mg/ml) was 51.47 °C, the molecular weight was 8987 g/mol, and the particle size was 318 nm. It was also found that the UCST increased and the particle size decreased with the Lignin-g-PDMAPS polymer concentration increased, and the UCST decreased and the particle size increased with the NaCl concentration increases. This work investigated UCST-thermoresponsive polymer which possessed lignin main chain combining the zwitterionic side chain, and provided a new way for development of lignin based UCST-thermoresponsive materials and medical carrier materials, in addition to expand the scope of eATRP.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xin Wang,Dayong Huang,Yang Liu,Shuangquan Yao,Chengrong Qin,Shuangfei Wang,Chen Liang
Understanding the chemical structural differences of key components at varying bamboo heights enhances knowledge of its biological properties and adaptive mechanisms, promoting its high-value utilization. In this study, lignin and lignin-carbohydrate complexes (LCC) were extracted from the base, middle, and top sections of bamboo culms, and the chemical composition, micro-regional distribution, and structural characteristics of key components were analyzed. Results showed that both lignin and hemicellulose contents followed the trend: top > base > middle. The size and number of fiber cells decreased progressively from the base to the top, with lignin content most abundant in the cellular tissues at the top, where the S/G structural unit ratio was also the highest. Lignin-ferulic acid (FA)-carbohydrate complexes were identified as major recalcitrant structures in LCCs across different bamboo heights. These findings offer key insights into the chemical structural differences of lignin and LCCs at various bamboo heights, providing a scientific foundation for understanding bamboo's biological characteristics and facilitating its high-value applications.
研究领域:
植物学
·
材料科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 47
·29178-29185
·
IF 3.361
Ying Wang,Yushan Liu,Jin Zhou,Jinquan Yue,Mingcong Xu,Bang An,Chunhui Ma,Wei Li,Shouxin Liu
This work assessed the fabrication of nitrogen-doped CQDs (NCQDs) from alkali lignin (AL) obtained from spruce, representing a green, low-cost biomass generated by the pulp and biorefinery industries. The AL was found to retain its original lignin skeleton and could be used to produce NCQDs with excellent photoluminescence properties by one-pot hydrothermal treatment of AL and m-phenylenediamine. These NCQDs exhibited blue-green fluorescence (FL) with excitation/emission of 390/490 nm under optimal conditions. The NCQDs showed pH and excitation wavelength-dependent FL emission behaviors. On the basis of the exceptional selective response of these NCQDs to specific solvents, we developed a FL probe for the detection of formaldehyde (FA). The FL intensity of NCQDs was found to be directly proportional to the concentration of FA in the range of 0.05 to 2 mM (R2 = 0.993), with a detection limit of 4.64 µM (based on 3σ/K). A composite film comprising NCQDs with poly(vinyl alcohol) was found to act as a sensor with a good FL response to FA gas. When exposed to gaseous FA, this film exhibited increased FL intensity and transitioned from blue-green to blue. A mechanism is proposed in which the NCQDs react rapidly with FA to generate Schiff bases that result in enhanced FL emission and the observed blue shift in color.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Xiaoxu Yang,Shiyao Hou,Tingting Chu,Jiazhi Han,Runsen Li,Yanzhu Guo,Yumei Gong,Haiming Li,Zhiwei Wan
Eco-friendly, renewable and green biomass materials are considered as the superior carbon precursors for producing carbon quantum dots (CQDs) in large scale. A major challenge is the limited contents of fluorophores in biomass, which then results in low quantum yields (QYs) and inferior fluorescence emission ability of the obtained CQDs. Herein, lignin with amounts of unsaturated aromatic and carbonyl fluorophores was employed as the carbon precursors to prepare CQDs through a green, facile approach. The magnesium and nitrogen elements were successfully introduced into CQDs with the aim of enhancing their QYs and extending their emission wavelengths. The prepared magnesium, nitrogen-doped CQDs (Mg, N-CQDs) could emit green fluorescence with a quantum yield (QYs) up to 46.38 %. The mechanism of their fluorescence ability was discussed extensively. More interestingly, the Mg, N-CQDs displayed a fluorescence transition between green and yellow color at pH value of 5.4, indicating their potential application as a probe to detect pH values of complicated environments. The findings in this paper would provide a viable strategy to converse lignin biomass waste into high-quality fluorescence nanomaterials.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Jinhao Huang,Weifeng Liu,Xueqing Qiu
For the first time, the coordination-based energy sacrificial bonds have been constructed in the interface between lignin and polyolefin elastomer for preparing a new class of high performance thermoplastic elastomers (TPEs) with biomass lignin as the hard plastic phase. The coordination bonds not only promoted the dispersion of lignin, but also improved the interfacial interactions between lignin and polyolefin elastomer matrix, and also facilitated the orientation of chain segments during stretching. The synergistic coordination effect of lignin promoted higher energy dissipation, leading to simultaneously enhanced strength and toughness of lignin-based TPEs even with the lignin loading as high as 30 wt %. The lignin-based TPEs also exhibited excellent shape memory performance. Our strategy offers a promising methodology for the facile production of high performance but cost-effective TPE materials using biorenewable resources as plastic phase.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
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.
研究领域:
材料科学
·
生物化学
✓ 已验证
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.
研究领域:
生物化学
·
可再生资源工程
✓ 已验证
产品关联
DOI
PubMed
AICHE JOURNAL
·
2022
·Vol. 68
·期 10
·e17785
·
IF 4.167
Xuliang Lin,Jianglin Liu,Linjun Wu,Liheng Chen,Yi Qi,Zhongjie Qiu,Shirong Sun,Huafeng Dong,Xueqing Qiu,Yanlin Qin
Exploring highly active and stable electrocatalysts for oxygen evolution reaction (OER) is crucial for developing water splitting and rechargeable metal-air batteries. In this study, a hybrid electrocatalyst of CoFe alloy and Co x N heterojunction encapsulated and anchored in N-doped carbon support (CoFe-Co x N@NC) was in situ coupled via the pyrolysis of a novel coordination polymer derived from lignin biomacromolecule. CoFe-Co x N@NC exhibited outstanding OER activity with a low overpotential of 270 mV at 10 mA cm −2 and stability with an increment of 20 mV, comparable to commercial Ir/C. DFT calculations showed that Co x N and N-doped graphitic encapsulation can reduce the binding strength between *O and CoFe alloy, limit metal leaching and agglomeration, and improve electron transfer efficiency, considerably enhancing the OER activity and stability. In situ coupling approach for preparing alloy and nitride heterojunctions on N-doped lignin-derived carbon offers a promising and universal catalyst design for developing renewable energy conversion technologies.
研究领域:
材料科学
·
能源化学
·
计算化学
✓ 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）