JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 26
·
IF 1.768
Xiang Gao,Wei Sheng,Yongchang Wang,Yegang Lin,Yingwu Luo,Bo-Geng Li
To assure the safety of the lithium-ion battery, the separator is required to have good thermal stability. Because the single-layer polyethylene (PE) separator can only tolerate a temperature of 130°C, it is seldom employed currently by lithium-ion battery manufacturers although its cost is low. In this article, we modified PE separator chain structure through solid-state ultraviolet (UV) irradiation method to achieve a separator with composite structure of ∼40% crystallized PE and ∼70% gel content. Approximately 40% crystallized PE chains fulfill the task of auto-shutdown at 130°C through melting and filling the pores. At the same time, the PE separator can maintain integrity till 220°C because of its highly cross-linked chain structure. Besides, the modified PE separator is hydrophilic with a water contact angle of 33° after UV treatment and is able to absorb more electrolyte. However, the tensile strength and elongation at the break decreased because the cross-linking network increased the rigidity. Nevertheless, these values still meet the requirements as the separator for lithium-ion battery. Considering the low cost and easy preparation, current cross-linked PE separator has potential to be used in lithium-ion batteries for various applications, including electric vehicles and energy storage purpose. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42169.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tiancheng Wang,Zehao Shi,Furan Wang,Shengrui Cui,Zengqi Zhang,Wei Liu,Yongcheng Jin
The shuttle effect of soluble lithium polysulfides (LiPSs) poses a crucial challenge for commercializing lithium–sulfur batteries. The functionalization of the separator is an effective strategy for enhancing the cell lifespan through the capture and reuse of LiPSs. Herein, a novel In2O3 nanorod with an ultrathin carbon layer (In2O3@C) was coated on a polypropylene separator. The results demonstrate the adsorption and catalysis of In2O3 on polysulfides, effectively inhibiting the shuttle effect and improving the redox kinetics of LiPSs. Besides, the ultrathin carbon layer increases the reaction sites and accelerates the electrochemical reaction rate. The cell with the In2O3@C interlayer displays excellent reversibility and stability with a 0.029% capacity decay each cycle in 2000 cycles at 2C. In addition, the In2O3@C interlayer significantly improves the cell performance under high current (888.2 mA h g–1 at 2C and room temperature) and low temperature (1007.8 mA h g–1 at 0.1C and −20 °C) conditions.
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PubMed
高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
·
2024
·
IF 4.8
Kexin Shi,Bentian Jing,Yifan Feng,Yong Yu
Ethnopharmacological relevance Within Anemarrhena asphodeloides Bunge (AAB), the pivotal bioactive constituents are identified as Anemarrhena asphodeloides Bunge total saponins (ABS). In traditional pharmacology, ABS has exhibited notable anti-inflammatory, hypoglycemic, and cardioprotective properties. Despite these observed effects, the specific protective mechanisms of ABS against metabolic diseases and improving the endocrine system remain largely uncharted. Aim to study This work intends to shed light on the effects and intrinsic mechanisms of ABS on metabolic diseases. Materials and methods The characterization of ABS components was achieved through High-Performance Liquid Chromatography/Mass Spectrometry (HPLC/MS). To evaluate ABS's anti-inflammatory efficacy, mouse macrophages underwent analysis using the Griess method. Induced differentiation of mouse fibroblasts was assessed through Oil Red O staining. In an obesity model with C57BL/6 N mice, ABS administration prompted measurements of glucose and insulin tolerance. Western blot analysis quantified lipolysis and anti-inflammatory protein expression. Nile red staining gauged body fat content in C. elegans post-ABS treatment. The mechanism of ABS action was elucidated through mRNA sequencing, further validated using RNA interference technology, and nematode mutants. Results ABS showcased the ability to diminish Nitric Oxide (NO) production in inflammatory macrophages and shrink adipocyte lipid droplets. In mice experiments, ABS was effective in alleviating fat accumulation and affecting serum lipid metabolism in diabetic mice. It enhanced oral glucose tolerance and insulin tolerance while increasing lipolysis-associated protein expression. ABS notably reduced fat content in C. elegans . Mechanistically, ABS downregulated NOD-like receptor thermal protein domain associated protein 3 (NLRP3) and monoamine oxidase A (MAOA) expression while enhancing UGT, ilys-2 , and ilys-3 . Lipolysis emerged as a pivotal pathway for ABS in the therapeutic intervention of metabolic diseases. Conclusions Our investigation has revealed that ABS exert a role in combating metabolic diseases by enhancing the body's defense mechanisms. ABS activate the NLRP3-neurotransmitter-visceral adipose pathway in mice, thereby bolstering resistance and diminishing fat accumulation. In C. elegans , ABS downregulated the expression of MAOA, bolstered resistance, and augmented glucuronidase activity, consequently leading to a reduction in fat content.
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PubMed
高影响因子
CLINICA CHIMICA ACTA
·
2024
·
IF 3.2
Xiao Bao,Yuxia Yang,Wenbin Niu,Yimin Wang,Hao Shi,Yangyun Zou,Yidong Liu,Cheng Wan,Jun Ren,Sijia Lu,Yingpu Sun
Background Chromosome abnormalities are a leading cause of conception failure and pregnancy loss. While traditional cytogenetics technologies like karyotyping have been helpful in identifying structural variations (SVs), they face challenges in detecting complex rearrangements and cryptic structures. In this study, we developed a new method called chromosome conformation based karyotyping (C-MoKa) to comprehensively detect different types of chromosomal abnormalities in patients with conception failure and pregnancy loss. Methods A total of 70 clinical samples exhibiting known results of SVs, mosaic aneuploidies, copy number variations （CNVs） and uniparental disomy (UPD) were included in our cohort and underwent C-MoKa analysis. The results obtained from different techniques, including karyotyping, CNV-seq, and CMA were compared and analyzed. Results Distinct chromosomal conformation patterns of various variations were observed and analyzed in clinical samples. Our C-MoKa method not only validated all the findings of karyotyping, CNV-seq and CMA, but also provided more detailed results. It demonstrated superior fragment resolution (<500 Kb) and more precise breakpoints (>100 kb). Moreover, C-MoKa showed higher sensitivity in decoding intricate rearrangements in a single test. Conclusions Our results highlight the potential utility of C-MoKa in precisely unraveling SVs, mosaic aneuploidies, CNVs, and UPD in clinical settings, which can significantly impact further clinical decision-making.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yonghang Mu,Zi Wang,Linhua Song,Kun Ma,Yao Chen,Peixun Li,Zifeng Yan
Sphingosine, an amphiphilic molecule, plays a pivotal role as the core structure of sphingolipids, essential constituents of cell membranes. Its unique capability to enhance the permeability of lipid membranes profoundly influences crucial life processes. The molecular structure of sphingosine dictates its mode of entry into lipid bilayers and governs its interactions with lipids, thereby determining membrane permeability. However, the incomplete elucidation of the relationship between the molecular structure of sphingosine and the permeability of lipid membranes persists due to challenges associated with synthesizing sphingosine molecules. A series of sphingosine-derived molecules, featuring diverse hydrophobic chain lengths and distinct headgroup structure, were meticulously designed and successfully synthesized. These molecules were employed to investigate the permeability of large unilamellar vesicles, functioning as model lipid bilayers. With a decrease in the hydrophobic chain length of sphingosine from C15 to C11, the transient leakage ratio of vesicle contents escalated from ∼ 13 % to ∼ 28 %. Although the presence of double bond did not exert a pronounced influence on transient leakage, it significantly affected the continuous leakage ratio. Conversely, modifying the chirality of the C-3 hydroxyl group gives the opposite result. Notably, methylation at the C-3 hydroxyl significantly elevates transient leakage while suppressing the continuous leakage ratio. Additionally, sphingosines that significantly affect vesicle permeability tend to have a more pronounced impact on cell viability. Throughout this leakage process, the charge state of sphingosine-derived molecule aggregates in the solution emerged as a pivotal factor influencing vesicle permeability. Fluorescence lifetime experiments further revealed discernible variations in the effect of sphingosine molecular structure on the mobility of hydrophobic regions within lipid bilayers. These observed distinctions emphasize the impact of molecular structure on intermolecular interactions, extending to the microscopic architecture of membranes, and underscore the significance of subtle alterations in molecular structure and their associated aggregation behaviors in governing membrane permeability.
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PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2024
·
IF 3.3
Liguang Gan,Changxu Ye,Tianshu Pi,Lingling Wang,Chunya Li,Long Liu,Tianzeng Huang,Tieqiao Chen,Li-Biao Han
An efficient method for the construction of C–P(V) and C–P(III) bonds via the iron-catalyzed phosphorylation of alcohols under ligand-free conditions is disclosed. This strategy represents a straightforward process to prepare a series of phosphine oxides and phosphine compounds in good to excellent yields from the readily available alcohols and P–H compounds. A plausible mechanism is also proposed. We anticipate that this mode of transforming simple alcohols would apply in chemical synthesis widely.
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高影响因子
Horticulturae
·
2024
·Vol. 10
·期 3
·252
·
IF 3.1
Jinliao Chen,Fei Wang,Yangting Zhang,Ruiyue Zheng,Xiaopei Wu,Ye Ai,Sagheer Ahmad,Zhongjian Liu,Donghui Peng
ThePEBPgene family is involved in many biological processes in plants, including plant growth and development, flowering regulation, light response, and abiotic stress response. But there is little information about the role of thePEBPgene family inCymbidiumspecies. In this study, we identified 11, 9, and 7PEBPgenes inC. ensifolium,C. sinense, andC. goeringii, respectively, and mapped them to the chromosomes. We also studied the physicochemical characteristics of the proteins encoded by thesePEBPs and analyzed their intra-species collinearity, gene structure, conserved motifs, and cis-acting elements. Furthermore, a total of forty PEBP genes fromC. sinense,C. ensifolium,C. goeringii,Phalaenopsis, andArabidopsiswere divided into three clades based on the phylogenetic tree. The expression patterns of 11PEBPgenes in different tissues and organs ofC. ensifoliumwere analyzed based on transcriptome data, indicating that theCePEBPs might play an important role in the growth and development, especially in the flower bud organs (1–5 mm).CePEBP5plays an indispensable role in both the vegetative and reproductive growth cycles ofC. ensifolium.CePEBP1is essential for root development, whileCePEBP1,CePEBP3,CePEBP5, andCePEBP10regulate the growth and development of different floral organ tissues at various stages. The findings of this study can do a great deal to understand the roles of thePEBPgene family inCymbidium.
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高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Jiahao Xu,Kangwei Hou,Xiaolin Li,Yuhan Bian,Yaping Wang,Li Wang,Guangchuan Liang
The practical applications of lithium manganese iron phosphate (LMFP) are severely circumvented by the inferior electronic conductivity and electrochemical reaction kinetics. In this work, a Na+-doping method is adopted to prepare Li1–xNaxMn0.6Fe0.4PO4/C (x = 0, 0.01, 0.02, 0.03) materials by spray drying combined with the carbothermal reduction method. It is found that appropriate Na+ doping enhances the crystallinity, reduces Li–Fe antisite defects, decreases the primary particle size, and homogenizes the size distribution of the LMFP material. Moreover, the inferior rate and cycling performance of LMFP are mainly ascribed to the slower Li+ diffusion kinetics of Mn redox. A combination of experiments and DFT calculations shows that Na+ doping can increase the Li–O bond length, widen the Li+ diffusion channel, and decrease Li+ diffusion energy barriers, which can accelerate the Li+ diffusion rate and Mn redox kinetics, thereby improving the high-rate capability and cycling stability of Na+-doped samples. Besides, doped Na+ can not only act as pillars to stabilize the structure but also reduce Mn3+ content and Mn–Mn interactions to alleviate the Jahn–Teller effect, which also helps to improve the cycling performance of Na+-doped samples, wherein the Li0.98Na0.02Mn0.6Fe0.4PO4/C sample exhibits optimal rate and cycling performances. Its specific discharge capacity is 125.0 mAh g–1 at 5 C, and the capacity retention rate reaches 96.7% after 100 cycles at 1 C. Therefore, the Na+-doping strategy is believed to be an effective modification means to ameliorate the high-rate and cycling capabilities of olivine-based cathode materials.
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Catalysis Science & Technology
·
2017
·Vol. 7
·期 9
·1838-1847
·
IF 5.773
Yi Zhang,Zhenyun Lan,Ni Jian,Zhuanghe Ren,Jianjiang Hu,Mingxia Gao,Hongge Pan,Yunhao Lu,Yongfeng Liu
In this work, we demonstrate a first attempt at understanding the catalytic mechanism of nanosized Co in reducing the dehydrogenation temperature of the Li–B–N–H hydrogen storage system by experimental observation and theoretical calculation. A nanosized Co@C composite (Co particles <10 nm) is successfully synthesized by casting a furfuryl alcohol-filled, Co-based metal–organic framework, MOF-74(Co), at 700 °C. Adding small quantities of the prepared nanosized Co@C composite significantly reduces the dehydrogenation temperature of the LiBH4–2LiNH2 system. The 5 wt% Co@C-containing sample releases approximately 10.0 wt% hydrogen at 130–230 °C with a peak temperature of 210 °C, which is reduced by 125 °C from that of the pristine sample. During hydrogen desorption, nanosized Co remains in the metallic state and only works as a catalyst to reduce the kinetic barriers of hydrogen release from the LiBH4–2LiNH2 system. Ab initio calculations reveal that the presence of a Co catalyst induces a redistribution of charge, which not only weakens the chemical H–B bonding but also enhances the electrostatic interactions between Hδ+ in the NH2 groups and Hδ− in the BH4 groups, consequently reducing the energy barriers for the formation of H2 molecules. This explains the low-temperature dehydrogenation behaviour of the Co-catalysed Li–B–N–H systems.
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 47
·25279-25294
·
IF 14.511
Linlin Sun,Xiaoshuo Liu,Xiaohan Jiang,Yibing Feng,Xunlei Ding,Nan Jiang,Jigang Wang
Inadequate accessible active sites and inhibited electron separation efficiency are always burning issues. This work successfully solves the above problems by constructing a novel S-scheme heterojunction with S–C bonds bridging composed of hierarchical g-C3N4 (3DA-CN) coupled with sulfur vacancies (Sv) ZnIn2S4 (Sv-ZIS/CN). The special structure provides more active sites for the photocatalytic reaction and maintains multiple light transmission channels, resulting in the improvement of the capture and conversion of solar energy. The interfacial electric field and S–C bonds as well as their effects benefiting the regulation of the efficiency of electrons transfer for efficient photocatalytic reactions are deeply investigated and comprehended. The tetracycline degradation efficiency of Sv-ZIS/CN reaches 96.36% and has the highest k value (0.03361 min−1), which is 7.55, 5.47 and 3.04 times that of 3DA-CN, Sv-ZIS and ZIS-S/CN (prepared by a mechanical approach), respectively. Meanwhile, H2O2 production experiments also verified that the photocatalytic activity of Sv-ZIS/CN was significantly improved compared with ZIS-S/CN. The mechanisms of tetracycline degradation and H2O2 production are discussed in depth. This work provides an unparalleled and impressive strategy to construct significantly efficient photocatalysts.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shuhong Huang,Yan Wang,Shuying Qiu,Jinquan Wan,Yongwen Ma,Zhicheng Yan,Quanmo Xie
Since high degradation efficiency and environmental friendliness, the Electro-Fenton technology has been widely applied to remove antibiotics in wastewater. In-situ loading of electrochemically active metals on graphite felt (GF) is considered as a promising strategy for improving its electrocatalytic activity and reusability. Here, a series of Mn/Co MOFs derivatives modified graphite felt cathodes (Mn x Co 3-x @C-GF) were fabricated without any binder, which was used for the treatment of ciprofloxacin (CIP). The morphology, pore structure and electrochemical activity of Mn x Co 3-x @C-GF changed by adjusting the ratio of Mn/Co in the MOF-74 precursor. Owning to the optimized Mn/Co ratio, Mn 2 Co 1 @C-GF exhibited the most excellent catalytic ability with hierarchical porous structure and faster electron transfer . The results showed that the CIP degradation efficiency could reach 99.8% in 60 min. Mn 2+/3+/4+ and Co 3+/2+ enhanced the generation of active radicals (·OH) by Fenton-like reaction and further improved degradation performance. In addition, the cathode had maintained good stability during four cycles. This work provides an alternative strategy for fabricating efficient self-supporting cathode materials in the future.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 11
·6953-6964
·
IF 4.186
Yuchao Qiu,Junjie Shi,Bin Yu,Changle Hou,Jingjing Dong,Song Li,Yumo Zhai,Jianzhong Li,Changsheng Liu
The recycling of titanium from titania-bearing slag is an important part of the circular economy; however, the yield of titania is restricted due to the lack of fundamental thermodynamic data. In the present work, the equilibrium phase relations of MgO–Al 2 O 3 –TiO 2 system in air at 1600°C have been determined using a high-temperature equilibration-quenching technique followed by X-ray photoelectron spectroscopy, scanning electron microscopy-energy-dispersive X-ray spectrometry, and X-ray diffraction. Ti 4+ was confirmed as the stable valence of titanium, and the rutile and spinel solid solution phases were detected to be coexisting with pseudobrookite solid solution phase, respectively. The formation principles of pseudobrookite and spinel solid solutions were confirmed in view of the corresponding crystal structure and the composition substitution relationship of the oxides at 1600°C. However, great discrepancies were found from the comparison of the present experimental results with the thermodynamic calculations and the literature results, and the present equilibrium phase relations are therefore significant for updating the present titania related thermodynamic database for a superior prediction of the thermodynamic behaviors of relevant process.
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危险品化学品经营许可证（带存储）