SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Simin Lin,Chunmei Lai,Zejie Huang,Wei Liu,Lei Xiong,Yuxin Wu,Yanqiao Jin
Synthesis of lignin-based carbon dots (LCDs) with high quantum yield (QY), stable fluorescence properties and biocompatibility has been a challenge. Here, we propose an improved two-step strategy for producing high-quality LCDs from enzymatic hydrolysis lignin (EHL). The p-aminobenzenesulfonic acid used in the strategy not only provides nitrogen and sulfur elements, but also tailors the disordered three-dimensional structure of EHL. The successful co-doping of N and S elements favors the reduction of the optical energy bandgap (E g ), resulting in a high QY of 45.05% for LCDs. The LCDs exhibited superior selectivity and sensitivity for Fe 3+ with a limit of detection (LOD) of 0.15 μM when Fe 3+ concentration was 50–500 μM. In addition, LCDs demonstrated significant fluorescence in HepG2 cells and HepG2 cells loaded with LCDs at a concentration of 80 μg/mL showed good viability, suggesting that they are suitable for in vivo applications. The luminescent centers of LCDs change during pH regulation and thus show a special visual response to pH changes, making them have great potential for detecting metabolism in living cells. This work provides a novel and low-cost method for fabricating sustainable fluorescent probes for chemical sensing and bioimaging.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY
·
2025
·
IF 9.4
Xiaohua Li,Zhitao Lei,Yu Cao,Shanshan Shao,Shiliang Wu
The cycloketones were prepared efficiently via the selectively hydrogenation of aqueous phase lignin-derived single phenolic monomer and mixtures. The yield and selectivity of cycloketones was greatly improved over Br modified metal-acid mixed catalyst (PdH5@Br). First, the effect of side-chain functional structures on the aqueous-phase hydrogenation of phenols with Pd/C catalysis was investigated and it was found that the benzene ring with methyl group attached is more easily hydrogenated, and the phenolic hydroxyl side chain was more susceptible to form carbonyl than methoxy groups. A large number of enols existed, thus the catalyst acidity was adjusted by extra addition of HZSM-5, over which the yield of cycloketones from guaiacol was significantly boosted to 67.9%. Subsequently, the electronic properties of catalyst were altered by adding Br over Pd catalyst, weakening the over-chemisorption of intermediate phenol, and the hydrogenating of phenol under PdH5 were enhanced, thus an increased yield of cycloketone of 18.4% occurred. After the hydrotreating of guiaiacol for 2 h at 523 K and 2 MPa H 2 , the yield of cycloketone reached 80.4% on PdH5@Br. The hydrotreating performance of PdH5@Br with lignin-derived phenolic monomer mixtures as the feedstock was also tested, and it presented great universality and stability. It provides an efficient catalyst system and promising technological ideas for biomass hydrotreating.
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 ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Binpeng Zhang,Dan Liu,Panhui Zhang,Yuebin Xi,Tianjin Li,Kai Chen,Yanmin Shen,Wenju Liu,Yunhui Feng,Huan Wang
Application of Bi 2 WO 6 (BWO) as a photocatalyst for organic wastewater treatment is limited by low removal efficiency. Porous carbon is often used to coupling with BWO for improving its removal efficiency. In our study, we found that the porous structure of carbonaceous substrates is very important for their modification properties. We examined the effect of carbonaceous substrates with different pore structures as a carrier on dye removal performance. The results showed that the interconnected porous structure was more effective for coupling with BWO than hierarchical porous, micro–mesoporous, and microporous structures. This structure facilitated uniform BWO loading owing to low mass transfer and was not prone to blockage after loading. The obtained BWO/lignin-derived interconnected porous carbon (BWO/LIPC) composite presented efficient contaminant removal via synergistic adsorption and photocatalysis. After 3 h of light exposure, BWO/LIPC-5 % exhibited a 96.5 % removal efficiency for Rhodamine B (initial concentration of 40 mg·L −1 ), with a removal rate 6.3 times that of pure BWO. After five use cycles, the removal efficiency remained above 90 %. The introduction of LIPC increased BWO adsorption performance. Dye molecules were concentrated on the BWO/LIPC surface, thus optimizing photocatalytic efficiency. Moreover, photoelectrochemical characterization revealed that LIPC served as an electron acceptor, effectively inhibiting the recombination of photogenerated electron–hole pairs in BWO and enhancing its photocatalytic activity. This dye removal strategy involving synergistic adsorption and photocatalysis provides valuable insights for developing efficient materials in wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2024
·
IF 4.7
Xu Haoming,Cheng Zhengzai,Djouonkep Lesly Dasilva Wandji,Gauthier Mario,Zuo Yingzi,Tang Wei,Xiang Leyang
The packaging industry faces a shortage of high-strength bio-derived polyesters that can rival polyethylene derivatives, resulting in the overexploitation of fossil resources. By condensing lignin-derived 2-methoxyhydroquinone with methyl 4-chloromethyl benzoate, the diester dimethyl 4,4’-(((2-methoxy-1,4-phenylene)bis(oxy))bis(methylene))dibenzoate (M) was synthesized. Using monomer M and hydroquinone hydroxyethyl ether, aliphatic-aromatic copolyesters P 1 -P 4 were prepared via melt polycondensation reaction employing various aliphatic diacids (1,4-butanedioic acid, 1,6-hexanedioic acid, 1,8-octanedioic acid, and 1,12-dodecanedioic acid). The chemical structures of the copolyesters were elucidated using FTIR and 1 H NMR, while their properties were characterized through gel permeation chromatography, differential scanning calorimetry, thermogravimetric analysis, tensile testing, and dynamic mechanical analysis. GPC analysis revealed that the average molecular weight (M w ) of copolyesters P 1 –P 4 ranged from 4.22 to 5.03 × 10 4 g/mol, while thermal property analysis indicated that the copolyesters thermal stability decreased with increasing aliphatic diacid spacer length unit. Also, the glass transition temperature (T g ) and melting point (T m ) decreased from 90 to 68 °C and 182–158 °C, respectively. Mechanical analysis showed a decrease in tensile modulus from 1740 to 1010 MPa, as well as yield strength from 76 to 54 MPa, but indicated an increase in elongation at break from 236 to 295%, owed to the growth of carbon chains which increases the proportion of flexible units in the polymer chain. The degradability study indicated a modest degradation rate from 3.9 to 5.1% after 30 weeks from P 1 –P 4 , with low ecotoxicity in all cases. P 4 , consisting of 1,12-dodecanedioic acid, exhibited the highest degradation rate, due to its low proportion of benzene units. These findings provide insights into the structure-property relationships of aliphatic-aromatic copolyesters while contributing to the advancement of high M w polyesters with performance comparable to conventional petroleum-derived polyesters, aligning with the strategy of green low-carbon, energy-saving, reduction, and sustainable development of polymeric materials.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xing Zhang,Jingfeng Wu,Tian Li,Chengzhi Zhang,Lingjun Zhu,Shurong Wang
Hydrodeoxygenation (HDO) of lignin-derived bio-oil offers a promising route for the production of advanced biofuels. However, the conventional HDO of lignin-derived bio-oil faces serious problems, such as low hydrocarbon yield and easy deactivation of catalysts. Herein, a novel reaction system consisting of a highly stable bifunctional catalyst (i.e., Ni−WO x /NiAl 2 O 4 ) and a dodecane solvent was developed for the HDO of lignin-derived phenolics. The Ni 0 species, derived from NiWO 4 precursors on the NiAl 2 O 4 , were of small crystallite size and high dispersion, together with the strong oxophilicity of W, thereby exhibiting high activity. The use of a highly stable NiAl 2 O 4 spinel support and the replacement of common solid acid with more stable WO x for the cleavage of C O bond accounted for excellent stability. The optimized 10Ni−15WO x /NiAl 2 O 4 exhibited a high guaiacol conversion of 97.8% with a high cycloalkane yield of 83.8% under the optimum conditions (250 °C, 5 MPa H 2 , and 4 h). Cycloalkanes with a high yield over 90% were also obtained by the HDO of other complex lignin-derived compounds. More importantly, the catalyst always retained its initial activity for the HDO of guaiacol in five runs, with negligible coke formation. Subsequently, the HDO behavior of the bio-oil obtained from walnut shell pyrolysis was also studied. The relative content of cycloalkanes in the products reached 44.3% after the reaction. This study highlights the prospect of a highly stable catalyst consisting of hydrogenation metal and oxophilic promoter, and dodecane solvent to enable efficient production of cycloalkanes from the HDO of lignin-derived phenolics.
研究领域:
能源化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiaoyan Zhang,Chunmei Gan,Kaiwei Huang,Fuying Li,Malin Cui,Kewei Liu,Xiaowan Yu,Da-Peng Yang
Bacterial infection has become the second leading cause of death in the world. Exploring a new highly antibacterial catalyst to replace traditional antibacterial agent is crucial for the society development of human beings. In this study, CuFe 2 O 4 /Lg-based carbon composited catalysts were rationally constructed by facile hydrothermal method. Lignin-derived carbon with enormous oxygen-containing functional group was beneficial to anchor CuFe 2 O 4 nanoparticles. The close contact interface between CuFe 2 O 4 and Lignin-based carbon material was expected to extend the range of optical absorption and promote the separation and transportation of photogenerated carriers. Under NIR (980 nm, 1.5 W/cm 2 ) light irradiation, the as-prepared CuFe 2 O 4 /Lg (20 μg/mL) exhibited excellent photo/photothermal synergetic in vitro (against Escherichia coli and Staphylococcus aureus ) and in vivo (against Staphylococcus aureus -infected mouse wound model) antibacterial performance. Furthermore, the cell count assay kit 8 (CCK-8 kit) demonstrated the good biocompatibility of this material. On the basis of the experimental results, a possible antibacterial mechanism based on the synergetic photothermal and photodynamic therapies was proposed. This work presented a lignin- derived carbon-based highly efficient antibacterial disinfection agent with desirable biosafety.
研究领域:
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wei-Dong Xiao,Ling-Ping Xiao,Yi-Hui Lv,Wen-Zheng Yin,Julio Sánchez,Shang-Ru Zhai,Qing-Da An,Run-Cang Sun
Efficient removal of heavy metal ions and organic pollutants in wastewater is of great significance to healthy development of ecosystems. However, the facile preparation of novel functional materials for robust removal of both types of contaminants still remain a challenge. Herein, bifunctional composites derived from nanoscale zero-valent iron (nZVI) coated with lignin-derived carbon (LC) were fabricated via a carbothermal reduction strategy and denoted as Fe 0 @LC. This hybrid material exhibits superior performance with a maximum heavy metal removal amount of Cr(VI) as high as 575.4 mg/g from aqueous solutions. Notably, the elimination rate of Cr(VI) (100 mg/L) by Fe 0 @LC could reach up to 100% through adsorption and reduction. Furthermore, the obtained Fe 0 @LC occurs Fenton-like reactions without additional supply of H 2 O 2 toward effective degradation of organic pollutants, including 100%, 100% and 80% for methylene blue, methyl orange and congo red, respectively. The in-depth experimental and theoretical analyses reveal the synergistic effects between the catalytic Fe 0 center and the lignin-derived carbon boost the activity for catalytic degradation of organic dyes and Cr(VI) in the optimized conditions. This work not only provides critical insights into rational design, working mechanism, and application of bio-functional materials for wastewater treatment, but also achieves the goal of “treating waste with waste”.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Advanced Sustainable Systems
·
2020
·Vol. 4
·期 10
·1900136
·
IF 4.869
Xing Zhang,Hui Yan,Lingjun Zhu,Tian Li,Shurong Wang
The monomers and dimers produced via lignin depolymerization are a promising alternative to transportation fuels after hydrodeoxygenation (HDO). However, these compounds contain numerous oxygen-containing functional groups that are strongly bonded to aromatic rings. Therefore, the conventional HDO of lignin-derived compounds faces serious problems of catalyst deactivation due to coke deposition and low hydrocarbon yields. A metal–solid super acid catalyst, i.e., Ru(SO 4 2− )/ZrO 2 –CeO 2 , is synthesized, characterized, and evaluated for the HDO of various lignin-derived monomers and dimers in a biphasic n -dodecane/H 2 O system. A high cyclohexane yield of 98.5% is obtained by the HDO of phenol performed at 200 °C and 5 MPa. The “hydrated” configuration can be formed between the hydrogenation intermediates and H 2 O on the Ru sites. In addition, the anionic vacancies of ZrO 2 –CeO 2 can be occupied by H − derived from the heterolytic cleavage of H 2 , leading to the formation of metal hydrides. The strong acidity of SO 4 2− /ZrO 2 –CeO 2 is beneficial for the subsequent deoxygenation of the hydrotreated products. In addition, the biphasic system can minimize the side reactions induced by the strong acidity of the catalyst. The catalytic system also exhibits a good catalytic performance for the HDO of other lignin-derived monomers and dimers to produce cycloalkanes.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuqing Liang,Hanwen Zuo,Mingyu Wen,Junyou Shi,Heejun Park
The traditional epoxy resin not only is flammable and non-recyclable and but also heavily dependents on petroleum resources, which cannot meet the requirements of fire prevention and sustainable development. In this study, a vanillin intermediate (VAP) with dynamic imine bond (C=N) was prepared by schiff base reaction between the lignin derivative vanillin (-CHO) and the cage-like polyhedral oligomeric silsesquioxane OA-POSS(−NH 2 ). Then, a biomass-based P-N-Si flame retardant (VAPD) was synthesized by adding 9,10-Dihydro-9-Oxa-10-Phosphaphenanthrene-10-Oxide (DOPO) into the VAP. Subsequently, the VAPD acted as curing agent of epoxy resin to prepare epoxy wood coatings (VAPDs/EP). The results showed that the VAPD-5/EP coating not only exhibited excellent self-healing property and was able to achieve 100 % healing within 35 min, but also presented distinctive UV-shielding performance. In addition, the VAPD-5/EP coating reached V-0 level of UL-94 test and got 29.3 % of limiting oxygen index (LOI). Compared with EP coating, the peak heat release rate (pHRR) decreased by 38 %. Furthermore, the VAPD-5/EP coating reached 6H level of hardness test and 4B level of adhesion test. A simple strategy for preparing self-healing flame retardant epoxy coatings with comprehensive properties for protection of wood materials was proposed in this study.
研究领域:
材料科学
·
生物质能
·
化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Han-Bing Gao,Le-Le Qiu,Fa-Peng Wu,Jian Xiao,Yun-Peng Zhao,Jing Liang,Yong-Hui Bai,Fang-Jing Liu,Jing-Pei Cao
Catalytic hydrogenolysis of C O bonds in lignin provides a promising route to produce high value-added biofuels and chemicals. However, designing highly active and stable catalysts for this process is still a challenge. Herein, a series of Ni/Al 2 O 3 catalysts were synthesized by calcination and reduction of layered double hydroxide precursors, and their activities were evaluated in the catalytic conversion of lignin-derived compounds. Diphenyl ether was completely converted with a 100% monomeric selectivity (cyclohexane and cyclohexanol) over the optimized Ni/Al 2 O 3 -500 under the optimal conditions of 200 ℃, 0.5 MPa H 2 and 1.5 h, indicating the excellent catalytic activity in the cleavage of C O bonds of the catalyst. The excellent catalytic performances of Ni/Al 2 O 3 -500 were originated from its relatively large specific surface area, well-developed porosity, small crystallite size, high Ni 0 concentration and strong interaction between the active metal and support. The reusability experiments show that Ni/Al 2 O 3 -500 possesses a relatively high stability for six reuses. Moreover, various lignin model compounds can be completely converted to corresponding monomeric products over Ni/Al 2 O 3 -500, indicating the applicability of this ingenious catalyst. The application of the hydrotalcite-derived Ni-based catalysts with high activity and stability provides a promising approach for the efficient hydrogenolysis of lignin derivatives.
研究领域:
催化化学
·
生物质转化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 12
·e53636
·
IF 3
Jituo Chen,Yuxiang Zhang,Feng He,Jun Ying,Shi-Neng Li,Li Peng,Qiang Wu,Zhiqiang Fan,Baiyu Jiang
Preparing bio-based epoxy resins with high performance is crucial to sustainable development. However, seeking renewable and flame-retardant epoxy resins with high mechanical properties are still challenging. Here, we reported a facile way to transform lignin derivatives to intrinsic flame-retardant epoxy resins with satisfactory mechanical properties. Two guaiacol-based novolac epoxy resins (i.e., GTEP/DDM and GPEP/DDM) were prepared as alternatives for petroleum-based DGEBA/DDM. The cured GTEP/DDM product showed a high T g of 209.5°C, a high tensile modulus of 3.13 GPa, and a high LOI of 28.6% with UL-94 V-1 rating, which outperformed DGEBA/DDM system. Specially, GPEP/DDM resin possessed more superior mechanical properties (e.g., tensile strength of 73.9 MPa, and tensile modulus of 5.85 GPa) owing to additional interactions (i.e., π–π interactions and hydrogen bonds), and outstanding anti-flammability (e.g., LOI of 31.2% with UL-94 V-0 rating) due to the endow of phosphorus-containing groups. The mechanical reinforcement and flame-retardant mechanisms were clarified based on structural evolution and performance variation. This work provides an efficient synthesis route to achieve a high-performance thermoset, which is a promising alternative for substituting conventional bisphenol-A epoxy resin for use as fireproof materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 3
·597-605
·
IF 9.405
Shaoqi Yang,Xingmei Lu,Haoyu Yao,Jiayu Xin,Junli Xu,Ying Kang,Yongqing Yang,Guangming Cai,Suojiang Zhang
Selective catalytic hydrotreatment of lignin-derived phenols and dimeric ethers into alkanes is crucial for utilization of lignin and its fragments. Herein, we developed an efficient catalytic system with well-dispersed metal nanoparticles supported on SBA-15 synergistic with an ionic liquid. The catalytic system could catalyze the hydrodeoxygenation (HDO) of various monomeric and dimeric lignin-derived phenols into the corresponding alkanes under acid free conditions. The synergistic [Bmim]PF6-Ru/SBA-15 (1-butyl-3-methylimidazolium hexafluorophosphate) catalysis exhibited the best HDO activity for lignin-derived phenols and dimeric ethers with >99.0% conversion and maximum >98.0% selectivity of the corresponding alkanes. The yield of cyclohexane from diphenyl ether was 97.7% with 100% conversion under 2 MPa H2 at 130 °C for 6 h. The mechanism investigation confirmed that the Ru/SBA-15 catalyst and the anion of [Bmim]PF6 played crucial roles in the hydrogenation process and deoxidization process, respectively. The catalytic system was reused six times for HDO of diphenyl ether to test its stability.
研究领域:
化学工程
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）