BIORESOURCE TECHNOLOGY
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2025
·
IF 9
Yu Tian,Jiangbo Li,Dengyang Wang,Shaojie Wang,Haijia Su
Biological hydrogen production via dark fermentation is a promising and sustainable approach for renewable energy generation. However, its practical application is hindered by the inefficient utilization of carbon substrates, as a large proportion is diverted into inhibitory by-products such as volatile fatty acids (VFAs). To overcome this limitation, this study developed an integrated one-pot system, combining dark fermentation with enzyme-catalyzed esterification, which converts VFAs into high-value esters while enhancing hydrogen production. Key influence factors, including lipase type, dosage, pH, and extractant type, were systematically evaluated. Under optimal conditions, cumulative hydrogen production reached 3631 ± 154 mL/L, a 58.21 % increase compared to the non-esterified group, while butyl butyrate (BB) production in extraction reached 8.66 ± 0.06 g/L. The carbon flow analysis demonstrated that approximately 7.60 % of the carbon from the consumed starch was converted into BB. Furthermore, a fed-batch fermentation resulted in simultaneous hydrogen and BB production, achieving a final BB production of 22.44 ± 0.36 g/L. Microbial community analysis indicated that the esterification strategy promoted the enrichment of Clostridium species, known for their pivotal role in hydrogen production. Under the esterification strategy, KEGG based functional genes analysis showed a notable enrichment in the relative abundances of genes associated with glycolysis and hydrogenase functions. This innovative approach not only alleviates VFAs inhibition but also provides a theoretical and technical foundation for the high-value utilization of VFAs, offering considerable potential for industrial applications.
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DOI
PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 48
·e05147
·
IF 2
Lingyu Li,Zhenzhen Tan,Yufeng Tan,Xiuling Cao,Hongjiao Li,Jiahong Pang,Jiachun Zhong,Yuhao Yang,Kaijie Yang,Mengjie Yue,Zejun Pu
Thermoplastic polyurethane (TPU) nanocomposites reinforced with hydroxylated multi-walled carbon nanotubes (MWCNTs) were synthesized via in situ polymerization of polycarbonate diol (PCDL), isophorone diisocyanate (IPDI), and chain extender. The MWCNTs were covalently integrated into the TPU matrix through reactions between surface hydroxyl groups and isocyanate. Systematic characterization revealed uniform MWCNT dispersion (SEM/XRD) without agglomeration up to 4 wt% loading. The nanocomposites exhibited enhanced hardness (80 to 89 Shore A), elevated thermal stability (5% weight loss temperature increased by 6 °C), and restricted soft-segment chain mobility (glass transition temperature rose from −37.34 to −26.26 °C). Critically, surface resistivity decreased dramatically from 10 14 (pure TPU) to 3 × 10⁶ Ω (4 wt% MWCNTs), achieving antistatic performance (5 × 10 11 Ω) at only 1 wt% loading. This work demonstrates a robust strategy for developing high-performance antistatic TPU nanocomposites.
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高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 13
·9174-9183
·
IF 9.5
Bin Chen,Fan Bai,Yingjie Feng,Sipu Wang,Xinyi Cao,Wei Li,Lianqin Wang,Xiaoyue Fu,Li Jin,Junfeng Zhang,Yan Yin,Michael D. Guiver
The limited surface reconstruction of NiFe alloy-based catalysts in an anion exchange membrane water electrolysis (AEMWE) restricts the utilization of active sites in the membrane electrode assembly (MEA), hindering further improvements in mass activity and AEMWE performance. Additionally, during MEA preparation using highly active powder-based catalysts, challenges such as contamination and coverage of the active sites may arise, impacting performance. This work presents an in situ anodic oxidation method to selectively leach Mo ions from pre-designed NiFe alloy particles, achieving bulk transformation and forming cation vacancy defects. Results demonstrated that the leaching of Mo ions facilitated the bulk transformation of NiFe to NiFeOxHy with an optimized electronic state, while Mo cation vacancies accelerated the deprotonation of hydroxyl (*OH) species, significantly lowering the free energy barrier required for *OOH formation. The resulting VMo-NiFe catalyst achieved an overpotential of 222 mV during rotating disk electrode (RDE) testing. After rapid in situ activation, the AEMWE equipped with a VMo-NiFe catalyst layer delivered 1.0 A cm−2 at 1.71 V, exhibiting high stability in galvanostatic and fluctuation tests. The in situ bulk transformation method developed in this work effectively enhances MEA performance and reduces the risk of activity loss during MEA preparation.
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SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Wenchao Zhang,Yao Shu,Zhiduo Wang,Tingzhi Zheng,Songyue Sun,Wenyang Li,Hongtao Lv,Bing Geng,Wen Ao
Aluminum powder is widely used as a metal fuel in solid propellants, thermite reactions and other energy-rich materials due to its excellent energetic properties. However, its performance is often hindered by ignition delay, incomplete combustion and particle agglomeration, making the efficient utilization of aluminum a persistent focus of research. In this work, we have used trifluoroethyl methacrylate (TFEMA) to prepare modified aluminum powders (Al@PTFEMA) with different fluoropolymer coating concentrations by in situ polymerization technology and systematically investigated its effect on the ignition and combustion characteristics of aluminum powders and propellants. The experimental results demonstrated that the fluoropolymer coating effectively suppressed surface oxidation of the aluminum powder, reducing surface oxygen content from 25.3 % to 1.8 %. Additionally, the preignition reaction (PIR) generated AlF₃ and other gaseous products, enhancing gas production performance. This combination significantly shortened the ignition delay time of the aluminum powder. In the propellant system, the sample PF3 containing 7.5 % Al@PTFEMA (AF3) exhibited optimal performance. At 1 MPa pressure, its burning rate decreased by 32 %. Under 7 MPa, combustion efficiency improved from 76.63 % to 96.61 % compared to the baseline propellant. Furthermore, the particle size of condensed combustion products (CCPs) decreased by 34 %. In addition, the modulation mechanism of Al@PTFEMA on the combustion characteristics of modified aluminum particle and propellant was revealed, providing theoretical support for the application of fluoropolymers in aluminum-based propellants.
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高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2025
·
IF 2.2
Xinshi Huang,Zhengde Wen,Huajie Cai,Dinglai Yu
Background Pancreatic cancer is a highly aggressive gastrointestinal tumor with limited treatment options, such as surgery and chemotherapy. Thus, further research into its pathogenesis and new treatments is necessary. Methods Fluorescence-activated cell sorting was employed to sort pancreatic cancer stem cells (PCSCs). Sphere formation assays and Cell Counting Kit-8 (CCK-8) assays were conducted to assess stemness and proliferation capacity. Quantitative real-time PCR and Western blot analysis were employed to assess gene expression levels. Furthermore, immunofluorescence microscopy and chromatin immunoprecipitation assays were conducted to examine alterations in signaling pathways and gene expression. Results Quercetin and gemcitabine may inhibit PANC-1 cells and PCSCs by affecting energy metabolism. Chromatin immunoprecipitation assays revealed an interaction between STAT3 and CPT1B in PCSCs. Quercetin and gemcitabine might affect energy metabolism by inhibiting STAT3 and CPT1B. Manipulating STAT3 expression (overexpression plasmids and siRNA knockdown) altered CPT1B mRNA and protein expression. Although acetyl-CoA reversed the quercetin- and gemcitabine-induced expression of N-cadherin, DECR1, and ALDH, it had minimal influence on CPT1B and STAT3 levels. Conclusion Quercetin inhibits the expression of CPT1B via the STAT3 signaling pathway, affecting lipid metabolism and exerting antitumor effects. Furthermore, the combined administration of quercetin and gemcitabine exhibits enhanced therapeutic efficacy.
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DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2017
·Vol. 40
·期 15
·3168-3174
·
IF 2.557
Mengxia Cheng,Zilin Chen
A trypsin immobilized enzyme microreactor was successfully prepared in capillary for studying enzyme kinetics of trypsin and online screening of trypsin inhibitors from traditional Chinese medicine through capillary electrophoresis. Trypsin was immobilized on the inner wall at the inlet of the capillary treated with polydopamine. The rest of the capillary was used as a separation channel. The parameters including the separation efficiency and the activity of immobilized trypsin were comprehensively evaluated. Under the optimal conditions, online screening of trypsin inhibitors each time can be carried out within 6 min. The Michaelis–Menten constant of immobilized trypsin was calculated to be 0.50 mM, which indicated high affinity of the immobilized trypsin for the substrate. The half-maximal inhibitory concentration of known inhibitor of benzamidine hydrochloride hydrate as a model inhibitor was 13.32 mM. The proposed method was successfully applied to screen trypsin inhibitors from 15 compounds of traditional Chinese medicine. It has been found that baicalin showed inhibitory potency. Molecular docking study well supported the experimental result by exhibiting molecular interaction between enzyme and inhibitors.
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高影响因子
Journal of Macromolecular Science Part B-Physics
·
2012
·
IF 0.739
Dong Li,Xiaohui Wang,Yanzhu Guo,Haifei Huang,Runcang Sun
Controllable synthesis of self-associating lauroyl-grafted chitosan with high molecular weight was realized in ionic liquid reacting media. The obtained lauroyl chitosan with different grafting degrees was characterized by FT-IR and 1H-NMR spectra. The chitosan derivatives were able to self-assemble into spherical polymeric micelles in water. The onset of micellization or critical micelle concentration (CMC) was estimated by fluorescence spectroscopy. The hydrodynamic diameters of various lauroyl chitosan micelles, determined by dynamic light scattering, were in the range of 122–295 nm. The morphology of the micelles was observed by scanning electron microscopy. The self-assembly behavior and the size of the assembled micelles of lauroyl chitosan were affected by the grafting degree of lauroyl groups. Generally, higher grafting degree resulted in lower CMC and smaller micelle size. These lauroyl chitosan nano-micelles may have potential applications in biological and medical fields.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yahong Yang,Min Hu,Wanmeng Lu,Lixia Xue,Xiufeng Lin,Enlu Liu
Pharmaceuticals and personal care products (PPCPs) contain a diverse range of organic groups that present a serious threat to the ecological environment and human health. However, their actual fate in rivers remains only partially understood. The occurrence, distribution, and risk assessment of PPCPs in aquatic systems have received global research attention. However, few studies have focused on the Longgang River in Shenzhen City, South China. This study was the first to simultaneously identify and quantify five PPCPs residues in the mainstream of Longgang River. All surface water and sediment samples were analyzed by solid-phase extraction (SPE) and high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). The five assessed PPCPs were all detected in the mainstream of the Longgang River, with sediment concentrations much higher than water concentrations. Fluconazole and Triclosan were the dominant PPCPs in water and sediments, with maximum concentrations of 55.86 ng/L and 19.24 μg/kg, respectively. Others were present at mean concentrations below 40 ng/L in water and 15 μg/kg in sediments. The recovery rates of the five PPCPs ranged from 57.2% to 110.6%, which were within the limits of reliability. These results demonstrate that sewage treatment plants exhibited different degrees of removal effects for the five PPCPs and showed a natural attenuation trend along the Longgang River for all PPCPs except carbamazepine. The trace amounts of individual PPCPs residues in the river posed a low risk to aquatic organisms in the mainstream, although the potential risks created by low dose exposure and bioaccumulation of PPCPs should be considered.
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高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2016
·Vol. 120
·期 1
·95-107
·
IF 1.265
Xing Bo,Chen Honglin,Zhang Xiaoming
Catalytic wet oxidation (CWO) of glyphosate (PMG) wastewater over a nitrogen-doped activated carbon catalyst was performed in an upflow fixed bed reactor at mild temperature (35–125 °C) and oxygen partial pressure (0.05–0.25 MPa). The catalytic performance was characterized by PMG and organic phosphorus (OP) conversion. All CWO experiments were under kinetic control by choosing suitable average particle size (0.3 mm, 40–80 mesh) and gas flow rate (500 mL min −1 ). A power law kinetic model was developed to describe PMG and OP conversion, assuming first order kinetics with respect to PMG and OP. This model and its calculated parameters successfully predicted PMG and OP conversion. The obviously different rate constant and activation energy for PMG and OP conversion suggested that removal of the intermediate of aminomethylphosphonic acid is the control reaction for OP conversion. Finally, the competitive oxidation of formaldehyde was insignificant and this model also proved a satisfactory description for treatment of the real PMG wastewaters. OP conversion for the different PMG wastewaters can reach over 90% at mild conditions (125 °C, 0.2 MPa of oxygen partial pressure, 25 min of liquid space time).
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高影响因子
Nanoscale
·
2020
·Vol. 12
·期 30
·16262-16269
·
IF 6.895
Mao-Sung Chen,Wenwu Fu,Yanjie Hu,Mao-Yuan Chen,Yuh-Jing Chiou,Hong-Ming Lin,Ming Zhang,Zhongrong Shen
A novel insertable and pseudocapacitive Li+ ion material for highly ordered layered montmorillonite/carbon is explored in the present study. The commercially available protonated montmorillonite and 3,3′-diaminobenzidine act as starting materials to synthesize the layered material via hydrothermal intercalation, oxidative polymerization and carbonization. This method of preparing montmorillonite/carbon nanocomposite exhibits several advantages. To be specific, raw materials are low cost and naturally abundant; the montmorillonite can undergo proton exchange easily to form a permutable proton-type material, and the protons in the layered nanocomposite can be directly substituted by the polymerizable molecules (e.g., 3,3′-diaminobenzidine). Accordingly, a sheet-like montmorillonite/carbon layered nanocomposite is achieved with the carbon stacking on the montmorillonite substrate for the intercalation behavior. As revealed from the electrochemical results, montmorillonite/carbon nanocomposite can deliver a high reversible capacity of 1432 mA h g−1 at 50 mA g−1 and superior rate capacity of 920 mA h g−1 at 10 000 mA g−1 for the lithium ion battery. Furthermore, the full cell with LiFePO4 as cathode and montmorillonite/carbon as anode maintains 94% capacity retention over 50 cycles as well as high coulombic efficiency.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2014
·
IF 5.03
Hongwei Lei,Guojia Fang,Fei Cheng,Weijun Ke,Pingli Qin,Zengcai Song,Qiao Zheng,Xi Fan,Huihui Huang,Xingzhong Zhao
In this article, we in situ fabricated copper sulfide (CuS) on fluorinated tin oxide (FTO) substrate using a low temperature and low cost hydrothermal method and then organic solar cells (OSCs) were fabricated by using a thin layer of CuS film as hole transporting layer (HTL). Our CuS films, consisting of two-dimensional (2D) intersected hexagonal nanosheets , are stoichiometric and show p-type electrical conductivity , a good transparency and a high hole mobility. The Fermi level , valence and conduction band energies for CuS HTL are characterized in detail through photoelectron spectroscopy studies. The small energy barrier between the valance band of CuS and the HOMO of poly(3-hexylthiophene) (P3HT) and the high hole mobility and electrical conductivity of CuS nanosheet film benefit for the hole transporting. Therefore, CuS HTL to OSCs results in a power conversion efficiency of 3.4% with P3HT and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as the active layer , which is a 13.3% increase in performance than devices with a poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT: PSS) HTL. Therefore, low-cost, environmental friendly and stable CuS is an appropriate choice for hole transporting materials (HTMs) in OSCs.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 20
·3551
·
IF 5.719
Chong Wang,Jian-Hao Lu,An-Bang Wang,Hao Zhang,Wei-Kun Wang,Zhao-Qing Jin,Li-Zhen Fan
The shuttling effect of soluble lithium polysulfides (LiPSs) and the sluggish conversion kinetics of polysulfides into insoluble Li2S2/Li2S severely hinders the practical application of Li-S batteries. Advanced catalysts can capture and accelerate the liquid–solid conversion of polysulfides. Herein, we try to make use of bismuth tantalum oxide with oxygen vacancies as an electrocatalyst to catalyze the conversion of LiPSs by reducing the sulfur reduction reaction (SRR) nucleation energy barrier. Oxygen vacancies in Bi4TaO7nanoparticles alter the electron band structure to improve instinct electronic conductivity and catalytic activity. In addition, the defective surface could provide unsaturated bonds around the vacancies to enhance the chemisorption capability with LiPSs. Hence, a multidimensional carbon (super P/CNT/Graphene) standing sulfur cathode is prepared by coating oxygen vacancies Bi4TaO7−xnanoparticles, in which the multidimensional carbon (MC) with micropores structure can host sulfur and provide a fast electron/ion pathway, while the outer-coated oxygen vacancies with Bi4TaO7−xwith improved electronic conductivity and strong affinities for polysulfides can work as an adsorptive and conductive protective layer to achieve the physical restriction and chemical immobilization of lithium polysulfides as well as speed up their catalytic conversion. Benefiting from the synergistic effects of different components, the S/C@Bi3TaO7−xcoin cell cathode shows superior cycling and rate performance. Even under a high level of sulfur loading of 9.6 mg cm−2, a relatively high initial areal capacity of 10.20 mAh cm−2and a specific energy density of 300 Wh kg−1are achieved with a low electrolyte/sulfur ratio of 3.3 µL mg−1. Combined with experimental results and theoretical calculations, the mechanism by which the Bi4TaO7with oxygen vacancies promotes the kinetics of polysulfide conversion reactions has been revealed. The design of the multiple confined cathode structure provides physical and chemical adsorption, fast charge transfer, and catalytic conversion for polysulfides.
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高影响因子
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