JOURNAL OF THE ENERGY INSTITUTE
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2023
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IF 5.7
Han-Bing Gao,Yun-Peng Zhao,Bing-Hu Xie,Le-Le Qiu,Jian Xiao,Jing Liang,Jian Li,Fang-Jing Liu,Yue-Lun Wang,Jing-Pei Cao
Selective hydrogenolysis of C–O bonds in lignin is regarded as an important process to produce high value-added chemicals and biofuels. Herein, high-performance Ru-based catalysts (Ru/AC) supported on activated carbon (AC) derived from corncob waste were prepared by a simple impregnation method. The optimal 5%Ru/AC possessed enormous specific surface area, well-developed porosity, high metal dispersion, small Ru particle size and strong metal-support interaction, showing a marvelous catalytic performance in the hydrogenolysis of diphenyl ether, benzyl phenyl ether and phenylethyl phenyl ether with different kinds of C–O bonds under mild conditions. Besides, various phenolic compounds were selectively hydrogenated into cycloalkanols and cycloalkanes over 5%Ru/AC, indicating the excellent catalytic activity in aromatic ring hydrogenation of this catalyst. In addition, high conversion of diphenyl ether and high selectivity of monomeric products were well maintained after employing this catalyst at least three times. The construction and application of the ingenious 5%Ru/AC catalyst highlighted a promising approach to the value-added utilization of lignin-derived aromatic compounds.
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高影响因子
Arabian Journal of Chemistry
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2022
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IF 6.212
Junjian An,Shanshan Wang,Mengxuan Huang,Jian Zhang,Peng Wang
Advanced oxidation processes (AOPs) have gained extensive attentions in organic decontamination in past decades. Iron-contained compound is an interesting material due to its adsorptive and catalytic performance, which has been applied widely in AOPs. Thus, graphene oxide (GO)-Fe 3 S 4 composite was synthesized by a solvothermal process and assessed as an effective adsorptive and catalytic dual functional material in this work. The composite displayed prominent adsorptive and heterogeneous Fenton-like catalytic performance, which was affected by preparation condition and the reactive parameters in catalytic system. Under optimized reactive conditions, the GO-Fe 3 S 4 composite yielded rapid degradation of vanillic acid, which the corresponding apparent rate constant was 1.81 × 10 −1 min −1 . Catalytic mechanism analysis revealed that the main oxygen species was hydroxyl radicals bounded on the surface of the composite. And the generation of •O 2 – was contributed to the conversion of H 2 O 2 to •OH. The analysis of degradation intermediates of vanillic acid and p -hydroxybenzoic showed that these compounds could be mineralized to small molecules. The prominent enhanced heterogeneous Fenton-like catalytic performance of GO-Fe 3 S 4 was due to a larger specific surface area, plenty of reductive active sites in the composite and a high mass transfer efficiency of oxidizing radicals in the reactive system.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Lingli Zhu,Dekui Shen,Kai Hong Luo
The design and development of high-efficient photocatalysts are confined by the limited light-harvesting capacity and rapid electron-hole recombination. The Bi 7 O 9 I 3 nanosheets decorated by lignin-derived carbon quantum dots (CQDs) were prepared through a facile hydrothermal process, which was applied for the photocatalytic degradation of tetracycline hydrochloride (TC). The prepared CQDs/Bi 7 O 9 I 3 composite with 3% CQDs content (CQDs/Bi 7 O 9 I 3 -3) showed the optimal photocatalytic degradation efficiency of 100% for TC under 300 W Xe lamp irradiation within 45 min. The corresponding degradation rate was 0.08133 min −1 , which was 4.74 times higher than that of pure Bi 7 O 9 I 3 . The superoxide radicals ( O 2 − ) and holes (h + ) were identified as the key reactive species for TC degradation through the photocatalytic mechanism exploration. The photocatalytic activity of CQDs/Bi 7 O 9 I 3 -3 composite could maintain above 80% after five recycles of degradation reaction, signifying its outstanding stability and reusability. The superior photocatalytic performance of CQDs/Bi 7 O 9 I 3 -3 is explained by the enhanced sunlight harvesting ability, accelerated electron transfer, and the formation of reactive species after the incorporation of CQDs. This work offers a promising strategy for constructing high-performance and environmentally friendly photocatalysts for water pollution treatment through the decoration of biomass-derived CQDs.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Liuping Du,Xin Jin,Gang Qian,Wen Yang,Ling Su,Yanli Ma,Shixue Ren,Shujun Li
Lignin is the most abundant renewable natural source of aromatic compounds but is the least utilized biomass resource. In a drive to increase both the value and utilization of lignin, whilst simultaneously reducing the environmental impact of petroleum products, we have designed a solvent-resistant recyclable lignin-based vitrimer, which has excellent mechanical performance. The vitrimer, which contains 73.0% lignin, has very high tensile strength (up to 68 Mpa), high elongation at break (up to 80.0%), very good solvent resistance and multiple recycling options (hot press recycling, ethylene glycol recycling, alkali recycling). The lignin-based vitrimer can be prepared without the need for catalyst or hot press molding and can be photothermally bonded. When used as a glass coating or a rubber adhesive, it not only has very good solvent resistance, but can also be easily disassembled for recycling. This work provides an efficient and high value method for utilizing lignin and also provides practical solutions to the problems of environmental pollution caused by non-renewable plastics and under-use of biomass resources.
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高影响因子
FUEL
·
2022
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IF 8.035
Minghao Zhou,Yaqi Xue,Fei Ge,Jing Li,Haihong Xia,Junming Xu,Jun Zhao,Changzhou Chen,Jianchun Jiang
MOF-derived Ni-based bimetallic catalysts were found to be effective for the in-situ hydrogenation/hydrodeoxygenation of lignin-derived monophenols and dimers with isopropanol as the hydrogen-donor solvent (without external hydrogen). The synergistic effects of bimetallic catalysts were studied, and their catalytic properties afforded the best conversion rate of phenols and cyclohexanol/cycloalkane yields. The detailed physicochemical characterization was conducted by means of XRD, H 2 -TPR, NH 3 -TPD, and pyridine-IR analysis. The effects of reaction temperature (200–260 ℃) and reaction time (2–5 h) on the performance of lignin-derived monophenols and dimers were investigated. During the in-situ hydrogenation/hydrodeoxygenation of lignin-derived phenols, the steric effects and the effects of various functional groups, notably methoxy groups, were investigated. In-situ conversion of lignin-derived phenols with isopropanol was achieved over different Ni/M ratios of NiM@C (M = Co, Mo, and La) catalysts, from which NiLa 0.33 @C produced satisfactory yields of cyclohexanol/cycloalkanes.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Shaoqing Wang,Zhihe Li,Weiming Yi,Peng Fu,Xueyuan Bai
Catalytic pyrolysis of corn cob lignin were preformed using a tailored HZSM-5 @Al-SBA-15 hierarchical zeolite for the production of value-added aromatic hydrocarbon. Resulted showed that the highly ordered two-dimensional p6mm mesoporous shell could uniformly form on the surface of HZSM-5 core phase. The porosity and acidity of the HZSM-5 @Al-SBA-15 could be tailored by adjusting the TEOS/HZSM-5 mass ratio in the synthesis process. The aromatic hydrocarbon components regulated due to pre-cracking and enhanced diffusion via the mesoporous shell, as well as the retained shape-selectivity of the HZSM-5 core. Herein, the relative content of MAHs reached 45.02% with fewer poly-aromatic hydrocarbons (PAHs) of 25.91% when the TEOS/HZSM-5 mass ratio of 1.0. However, the length of the diffusion path had a certain impact on the anti-coking behavior. The catalytic stability of the hierarchical zeolites was also improved, with less coke formation than HZSM-5 alone. This work demonstrates that using a tailored hierarchical zeolite to regulate aromatic hydrocarbon components is feasible, and provide a reference for the practical application of agricultural crop wastes.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Wei Xie,Mao Chen,Shuxia Wei,Zongfang Huang,Zhili Li
The low water permeability of reduced graphene oxide (RGO) membranes limit their wide applications in water treatment. Herein, a new route to fabricate a lignin nanoparticles-intercalated RGO composite membrane with high flux is reported. The addition of alkali lignin (AL) not only contributed to the reduction of graphene oxide (GO) in the hydrothermal reduction process, but also intercalated between RGO nanosheets . The AL/RGO nanosheets were further cross-linked with polydopamine (PDA) to stabilize the interlayer structure and finally assembled onto a glass fiber (GF) membrane by a vacuum filtration process. The AL/RGO@PDA membrane shows a large pure water flux up to 2410.3 L/m 2 h, which increased by 297.3% than that of the RGO composite membrane (810.7 L/m 2 h) without nanoparticles intercalated. Even after 10 cycles, the AL/RGO@PDA membrane remained high separation efficiency (above 99.10%) for n-hexadecane emulsion. In addition, such a membrane maintained the original performance at high temperature (98 °C) and in highly corrosive environments (pH=1, pH=14). Overall, this study provides a facile and eco-friendly method to fabricate high flux RGO composite membrane, showing promising application for water purification and separation.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ruijin Li,Danlian Huang,Sha Chen,Lei Lei,Yashi Chen,Jiaxi Tao,Wei Zhou,Guangfu Wang
Lignin exhibits some antioxidant and UV protection due to its large number of phenolic hydroxyl and methoxy groups , which can be used in the field of sun protection. However, its complex macromolecular structure , high polydispersity , low solubility and deep coloration limit their development in the sunscreen field. In this work, we purified and separated lignin by solvent fractionation so that its phenolic hydroxyl content could be retained or even increased without modification. Consequently, by controlling environmental factors, lignin rapidly self-assembles into nanospheres without changing its structure, which not only achieves the standard of light-colored lignin but also meets the requirement of high sunscreen performance. It was measured that the lignin nanospheres formed by this method could meet more than 90% of UV blocking, especially for ultraviolet (UVA) fragments, when mixed with commercially available creams. It not only promotes the application of lignin in the field of sun protection, realizes the sustainable development of lignin, but also alleviates the problem of solid waste treatment and disposal.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Yan Ding,Kangping Cui,Xueyan Liu,Qijun Xie,Zhi Guo,Yihan Chen
In this work, lignin peroxidase (LiP) was extracted for the in vitro degradation of a persistent compound (propranolol, PPN). The results showed that 94.2% of PPN was degraded at 30 U L −1 LiP activity and 10 mg L −1 PPN. The PPN degradation rate increased from 33.5% to 94.2% when the veratryl alcohol (VA) concentration varied from 0 to 180 µM, but decreased to 73.1% with further VA addition. This phenomenon confirmed that VA was indispensable, however, it also acted as a competitive inhibitor of PPN oxidation . Computational analysis revealed that the Trp171…iron porphyrin (TRP-FeP) path was responsible for specific substrate (e.g., VA) transformation, and another long-range electron transfer (LRET) path through His–Asp…FeP (HSP-FeP) was discovered for non-specific substrate (e.g., PPN) degradation. These two electron-transfer routes shared one catalytic center, and VA protected the enzyme from H 2 O 2 -dependent inactivation. The HSP-FeP path transformed PPN through single electron transfer or H abstraction mechanisms. In addition, hydroxyl radicals generated in the LiP/H 2 O 2 system were involved in the hydroxylation of the PPN intermediates. Possible degradation pathways were deduced using these degradation mechanisms and mass-spectrometry analysis. The multipath degradation mechanism endowed LiP with a remarkable capacity for removing various recalcitrant pollutants in environmental remediation.
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PubMed
高影响因子
Journal of Cleaner Production
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2022
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IF 11.072
Xiran Lin,Tao Shen,Minghui Li,Jingwen Shaoyu,Wei Zhuang,Ming Li,Hong Xu,Chenjie Zhu,Hanjie Ying,Pingkai Ouyang
Effectively removing heavy metals from the wastewater using a green low-cost natural polymer-based adsorbent received a great deal of attention. In this study, natural γ-polyglutamic acid (γ-PGA) and ε-poly-L-lysine (ε-PL) functionalized lignin (DLGS and DLLS) were synthesized through demethylation/phenolation and amination to increase its intrinsic reactivity and adsorption sites, which were used to remove heavy metals from aqueous solutions. DLGS and DLLS were comprehensively characterized by 31 P, 2D HSQC NMR, and elemental analysis (EA). The adsorption property of DLGS and DLLS for Pb 2+ have been systematically investigated. The adsorption kinetics and isotherms were compliant with the pseudo-second-order model and Langmuir isotherm model, respectively. The maximum adsorption capacity of DLGS and DLLS for Pb 2+ was 275.9 and 231.8 mg g −1 at 298 K, respectively, which is higher than that of most of the lignin-based adsorbent reported. Furthermore, it is confirmed that DLGS and DLLS exhibit excellent selectivity for removing Pb 2+ through competitive adsorption experiments. Based on the Fourier transform infrared spectrum (FTIR) and X-ray photoelectron spectroscopy (XPS) and the density functional theory (DFT) calculations, the hydroxyl, carboxyl, amino, methoxyl, and dithiocarbamate groups are contributed to the binding with Pb 2+ , and density functional theory calculation further suggested dithiocarbamate and the carboxyl group are the primary active sites.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Xing Fei,Quanzhou Xu,Lijing Xue,Xiaowen Zhong,Ze Zhang,Kunyi Liu,Xuliang Lin,Tiejun Wang,Yanlin Qin,Xueqing Qiu
An efficient and stable catalyst to produce higher alcohols with a higher heat value and cetane number and less corrosive to engines from aqueous ethanol is still facing challenges. Here, a novelty of NiSn bimetallic catalysts encapsulated in a nitrogen-doped lignin-based carbon material (NiSn@NC) was prepared by modified biorefinery lignin and further precisely coordinated with metal ions to form a lignin-metal supramolecular material followed by in situ calcining. Results showed that the optimized Ni20Sn1@NC catalyst exhibited a superior ethanol conversion (68.5%), a C4+ higher alcohol yield of 31.8%, and a ratio of iso to normal alcohol of 0.52. Moreover, it also exhibited excellent stability even after four-cycle runs. Structural analysis revealed that the Sn/N-doping lignin-based carbon material improved the Ni dispersion and basic site density, which adjusted efficiently the electronic structure of the metallic active site. Therefore, the NiSn@NC bimetallic catalysts showed satisfactory conversion and stability of aqueous ethanol upgrading to C4+ higher alcohols.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2023
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IF 7.8
Hong Guo,Yaohua Liu,Yuancai Lv,Yifan Liu,Yunzhi Lin,Minghua Liu
A new nitrogen doped sinocalamus oldhami lignin-based activated biochar (denoted as N-BGAC) with a notably high adsorption efficiency was prepared for the removal of malachite green (MG). The properties and structure of N-BGAC were thoroughly characterized, alongside an investigation into the MG adsorption process . The findings revealed that N-BGAC possessed a substantial specific surface area of 2238 m 2 g −1 , nearly double that of the activated biochar lacking nitrogen doping (BGAC). Additionally, N-BGAC exhibited exceptional adsorption efficiency for MG, boasting a maximum adsorption capacity of 1372.5 mg g −1 , marking an enhancement of nearly 2.5 times compared to BGAC. By exploring the adsorption mechanism, it could be found that the adsorption process was a spontaneous exothermic reaction , and mainly controlled by pore-filling effect, electrostatic interactions, hydrogen bonding, hydrophobic interactions and π-π bonding interactions. Crucially, in the regeneration experiments, the removal percentage of MG could still reach 81.5% after four cycles of regeneration, making it promising in the contaminant removal .
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高影响因子
危险品化学品经营许可证（带存储）