JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Zhaoyu Zhang,Yufei Zhang,Minghui Ye,Yongchao Tang,Xiaoqing Liu,Cheng Chao Li
SiO x /C composites are highly potential anode alternatives for next-generation lithium-ion batteries (LIBs) owing to their low cost and high theoretical capacity. However, the sluggish lithium-ion diffusion kinetics severely limit their practical capacity and rate performance. Herein, a high-capacity and high-rate anode based on commercial SiO x /C is facilely achieved by in situ constructing a Li + conductive interphase (LCI) to simultaneously boost the transport efficacy of Li + ions and buffer the volume expansion. The as-designed, LCI-protected SiO x /C anode delivers an exceptionally high capacity of 1420.9 mAh g −1 at 0.2 A g −1 , excellent rate performance (91.4% capacity retention from 0.2 A g −1 to 1 A g −1 ) and long cycling stability, substantially outstripping the pristine SiO x /C counterpart and most recently reported Si-based electrodes. More importantly, taking advantages of the fast and stable lithiation/delithiation processes, this electrode can also be adapted to further applications at large current densities (766.44 mAh g −1 at 5 A g −1 ) or high mass loadings (5.02 mAh cm −2 at 0.1 A g −1 , ∼3.5 mg cm −2 ). A full battery with satisfactory electrochemical performance is also demonstrated. The strategy of building ion conductive interphase to subtly tailor the transport behavior of Li + ions is anticipated to unlock the practical deployment of Si-based LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED SYNTHESIS & CATALYSIS
·
2017
·Vol. 359
·期 13
·2215-2221
·
IF 5.646
Wenhui Zhu,Yingcai Ding,Zhaogang Bian,Ping Xie,Baojun Xu,Qiujie Tang,Wei Wu,Aihua Zhou
Sulfenylation is an important transformation to generate C−S bonds in organic synthesis. Here, two three-component synthetic protocols have been developed by using imidazo[1,2- a ]pyridine, inorganic, odorless S 8 and alcohols or arylboronic acids as reactants to make alkylthio-/arylthio-substituted imidazo[1,2- a ]pyridine derivatives via C( sp 2 )–H functionalization. The reactions proceeded with high efficiency and broad functional group tolerance, affording the products regioselectively and in good yields.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2014
·
IF 3.816
Wang Liju,Keyume Ablajan,Feng Jun
A rapid and efficient ultrasound-promoted one-pot synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivatives is described here. The reaction of substituted phenylhydrazine and dialkyl acetylenedicarboxylate with substituted isatin and malononitrile is catalyzed by l -proline to give good-to-excellent yields in water/ethanol (v/v, 1:1) at room temperature.
研究领域:
有机化学
·
催化反应
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sen Lin,Jing Lin,Zhiqiang Xiong,Xue He,Xin Li,Chongbo Liu,Chengying Wang,Xiaojun Zeng,Xuliang Nie,Renchao Che
Magnetic carbon aerogels with high porosity, ultralow density, and excellent impedance matching are considered to be a promising microwave absorption (MA) material. In this study, ethylene glycol polymerization is used to assemble Ni 3 Fe particles into a micro-helical chain, which is further wrapped by MXene and then encapsulated in poly-Schiff-base aerogels through the carbonyl–amine condensation reaction. Finally, ultralight TiO 2 /Ni 3 Fe/MXene/C (NFMC) aerogels are synthesized through calcination treatment. Benefiting from the electromagnetic synergistic effect of multi-dimensional and multi-component materials, the NFMC-7 aerogel exhibits excellent MA performance with a minimum reflection loss of −61.6 dB at 3.0-mm thickness and an effective absorption bandwidth of 8.16 GHz at 2.77-mm thickness under a low filler loading of 7.6 wt%. Commercial computer simulation technology is used to verify the strong magnetic and dielectric loss characteristics of Ni 3 Fe chains. At the same time, the NFMC-7 aerogel exhibits excellent radar stealth, heat insulation, compression resistance, and fire resistance performance, which verifies its practical applicability. Overall, this work establishes an effective strategy to fabricate multi-functional magnetic aerogels, which can serve as lightweight, thin, and strong microwave absorbers with broad absorption bandwidth.
研究领域:
材料科学
·
电磁学
·
多功能材料
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 12
·1779-1788
·
IF 2.6
Songwei Ye,Zunxian Yang,Yuliang Ye,Zhiming Cheng,Hongyi Hong,Zhiwei Zeng,Zongyi Meng,Qianting Lan,Hui Zhang,Ye Chen,Jiaxiang Wang,Yuting Bai,Xudong Jiang,Benfang Liu,Jiajie Hong,Tailiang Guo,Shen Xu,Zhenzhen Weng,Yongyi Chen
A carbon layer usually covers the outside of SnS/MoS2 nanosheets produced by a traditional C-layer cladding process, resulting in a material with a lower specific surface area and fewer active sites. Therefore, it is difficult for these as-obtained SnS and MoS2 materials to be directly employed as electrode materials. There is a great need to develop a new C-layer coating process that can effectively coat active materials and simultaneously increase the specific surface area. In this study, novel SnS@C/MoS2 nanotubes were designed and synthesized by a self-sacrificing template method (SSTM). Specifically, MoO3 nanoribbons were first coated with Sn to produce Sn-MOF, and SnS@C/MoS2 nanotubes with a particular nanosheet architecture preserved were achieved via an elegant SSTM vulcanization strategy. This SSTM preparation method not only retains the nanosheet microstructure of the surface but also leaves a thin layer of amorphous carbon on the surface, which greatly improves the conductivity and effectively improves the cycling stability. In addition to above-mentioned advantages, there is a synergistic effect between the various components of the SnS@C/MoS2 nanotubes, which has a positive effect on the electrochemical performance. When used as the anode of a lithium-ion battery (LIB), the SnS@C/MoS2 composite can maintain a specific discharge capacity of 970.9 mAh g−1 after 500 cycles at a current density of 1 A g−1, and a specific discharge capacity of 778.1 mAh g−1 even after 1000 cycles at a current density of 2 A g−1. This method provides a reference for the synthesis of other nanostructured materials.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
·
无机合成
✓ 已验证
DOI
高影响因子
MOLECULAR NEUROBIOLOGY
·
2025
·Vol. 63
·期 1
·335
·
IF 4.3
Pan Gaowei,Liu Xiaoling,Zhang Xiaoyue,Gao Hao,Xu Ting,Li Kemin,Wang Lei,Ji Shangrong,Li Ting,Zhang Shengxiang
Monomeric C-reactive protein (mCRP) is a key acute phase reactant involved in inflammatory responses. Cerebral ischemia triggers persistent neuroinflammation. However, the effects of mCRP on global cerebral ischemia are poorly understood. In present study, mCRP was intracerebroventricularly injected to brain, and a bilateral common carotid artery ligation (BCAL) model was established in CX3CR1 GFP/+ mice. Behavioral tests were employed to evaluate spontaneous activity, rotarod performance (latency to fall), and forelimb grasping strength in mice. Nissl and Fluoro-Jade C (FJ-C) staining were used to assess neuronal injury. Skeletonization analysis and CD16/32, CD206 staining were used to assess microglial activation. RT-qPCR was applied to evaluate the changes of inflammatory factors and complement system. Primary cultured microglia and oxygen–glucose deprivation (OGD) model were used to verify the effects of mCRP on microglia in vitro . Results showed that mCRP treatment exacerbated behavioral performance post-ischemia. Nissl staining showed that mCRP caused a significant decrease in neuronal density. Additionally, FJ-C staining indicated an increase in degenerative cells after mCRP treatment. Immunofluorescence analysis revealed an increase in CD16/32 and CD206-positive microglia, and skeletonization analysis showed increased de-ramification of microglia following mCRP administration. RT-qPCR results further demonstrated that mCRP treatment upregulated the expression of pro-inflammatory and anti-inflammatory factors, as well as complement system components, in both brain tissue and primary cultured microglia following ischemia or OGD. These findings suggest that mCRP significantly enhances microglial activation, increases the level of inflammatory response, exacerbates neuronal loss and degenerative damage, and impairs behavioral performance after ischemia.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zesheng Li,Fangyu Gan,Juncheng Han,Qingrong Yao,Lichun Cheng,Jiang Wang,Jianqiu Deng,Zhao Lu,Qianxin Long,Yan Zhong,Huaiying Zhou,Guanghui Rao
Y 2 O 3 has emerged as a promising material for electromagnetic wave (EMW) absorption due to its excellent dielectric properties . However, the inherent insulating nature and single loss mechanism limit its absorption performance. Research on the microstructure modulation and component regulation of Y 2 O 3 -based absorbers remains relatively unexplored. In this work, Y 2 O 3 /C composites with flower-like architectures were synthesized for the first time via a metal-organic framework (MOFs) templating method. The effects of pyrolysis temperature on the microstructure, phase composition, and EMW absorption performance of the Y 2 O 3 /C composites were systematically investigated. At a pyrolysis temperature of 800 °C, the flower-like Y 2 O 3 /C microsphere exhibited optimal EMW absorption performance. The minimum reflection loss (RL) of pristine Y 2 O 3 was only −4.75 dB, while the Y 2 O 3 /C composite achieved a minimum RL of −51.77 dB and a maximum effective absorption bandwidth of 4.32 GHz. Moreover, by simply adjusting the matching thickness, the optimal sample exhibited strong absorption (RL < −30 dB) over a wide frequency range of 4–18 GHz. The incorporation of carbon effectively neutralized the insulating nature of Y 2 O 3 , thereby optimizing the impedance matching . The synergistic effects of multiple loss mechanisms, including polarization loss, resistance loss, and interfacial polarization, facilitated substantial EMW attenuation . This study provides a promising strategy for the design and fabrication of high-performance rare-earth oxide EMW absorbers with tunable morphologies and properties.
研究领域:
材料科学
·
电磁材料
·
纳米技术
·
复合材料
✓ 已验证
DOI
高影响因子
BMC Chemistry
·
2019
·Vol. 13
·期 1
·1-15
·
IF 0
Guo J.,Ma Yu L.,Yu Jia Y.,Gao Yu J.,Ma Ning X.,Wu Xiao Y.
Herein, 2-(2-methoxyphenoxy)-1-phenylethanol (β- O -4), 2-methoxyphenyl anisole (α- O -4) and 4-phenoxyphenol (4- O -5) were selected as typical lignin model compounds. Given the effectiveness of traditional acid–base catalysts for lignin depolymerisation, a novel Ni/CaO–H-ZSM-5(60) catalyst was prepared to investigate the difficulty level of C–O bond of three model compounds cleavage in ethanol. It was observed that Ni/CaO–H-ZSM-5(60) had prominent performance on the C–O bond cleavage at very mild conditions (140 °C, 1 MPa H 2 ). Among them, the C–O bond of α- O -4 and β- O -4 could be completely cleaved within 60 min. Although the C–O bond of 4- O -5 had high bond energy, 41.2% of conversion was occurred in 60 min. The introduction of CaO could regulate the acidity of H-ZSM-5 to enhance the ability to break C–O bonds. Moreover, the possible pathways of C–O ether bonds in three lignin model compounds cleavage were proposed in order to selectively obtain target products from the raw lignin degradation.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wei Zhao,Xunhui Xiong,Yingbang Yao,Bo Liang,Ye Fan,Shengguo Lu,Tao Tao
The construction of high capacity cathode materials consisting of two active components, LiFe x Mn 1-x PO 4 and Li 3 V 2 (PO 4 ) 3 , is rarely reported. Herein, 5LiFe 0.9 Mn 0.1 PO 4 ∙4Li 3 V 2 (PO 4 ) 3 /C (LFMVP/C) composites are synthesized by a simple two-step process, including ball milling and heat-treatment. The electrochemical reactivity of the composites with lithium is evaluated. The cathode assembled with LFMVP/C shows better electrochemical performance than that of the single active component (LiFePO 4 , LiMnPO 4, or Li 3 V 2 (PO 4 ) 3 ) during charging and discharging in the potential range of 2.4 and 4.8 V. It delivers the specific capacities of 195, 173, and 158 mAh∙g −1 at 0.1C, 0.5C, and 2C, and retains 88% of the initial discharge capacity after 100 cycles at 0.1 C. Compared with the single active component (LiFePO 4 , LiMnPO 4, or Li 3 V 2 (PO 4 ) 3 ), the lithium-ion diffusion coefficient of the composite composed of two active components (LFMVP/C) is higher.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Wei Zeng,Yao Tian,Xuehua Dong,Ling Huang,Hongmei Zeng,Zhien Lin,Guohong Zou
Birefringent crystals are extensively utilized across diverse optical applications due to their unique property of splitting incident light into dual refracted rays, thereby modulating and controlling light polarization. The pursuit of promoting the birefringence of such crystals to facilitate device miniaturization has recently emerged as a prominent area of focus. In this investigation, we introduce two molybdenyl iodates, namely, C(NH2)3MoO3(IO3) and Rb2MoO2(I2O6)(IO3)2, conceived through a “cation–anion synergetic interaction” strategy. Each compound exhibits a one-dimensional chain structure. Despite processing similar wide band gaps (3.33 and 3.22 eV), these materials display a variance in their birefringence (Δn = 0.426 and 0.261 @546 nm). Notably, C(NH2)3MoO3(IO3) showcases the highest birefringence among all hitherto reported molybdenyl iodates, signifying its potential as a high-performance birefringent crystal. Theoretical analyses indicate that the C(NH2)3+ cation, acting as a birefringence-active unit, significantly bolsters the birefringence of molybdate iodates. Moreover, the presence of extensive hydrogen-bonding interactions between C(NH2)3+ cations and iodates influences the orientation of the highly anisotropic iodates, thereby further enhancing the birefringence of C(NH2)3MoO3(IO3). This research paves the way for the future exploration of organic–inorganic hybrid molybdenyl iodates exhibiting exceptional optical performance.
研究领域:
光学材料
·
晶体学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yuzhe Liu,Qi Li,Yuhan Liang,Junhao Liang,Wenliang Feng,Bin Wu,XuLei Sui,Zhenbo Wang
The inherently low active site accessibility of single-atom Fe-N-C catalysts severely compromises their catalytic activity relative to Pt-based catalysts, thereby hindering their practical implementation in critical applications. This work systematically investigates the synergistic effects of physical confinement and chemical induced growth strategy on optimizing active site accessibility of Fe-N-C catalysts for oxygen reduction reaction. Through a physical confinement strategy, the catalyst particle size is successfully reduced from the micrometer scale to the nanometer scale. Subsequently, by employing chemical-induced growth, the particle size is precisely controlled within the range of 623 nm to 421 nm, simultaneously establishing an optimal balance between the catalyst particle size threshold (420 nm) and the ordered macroporous framework. This approach maximized the accessibility of active sites and significantly enhanced the catalytic activity of the Fe-N-C catalyst. The optimized catalyst (OM-Fe-NC-4) exhibits outstanding performance, achieving a remarkable half-wave potential of 0.888 V, surpassing both commercial Pt/C and most state-of-the-art Fe-N-C catalysts. Additionally, it demonstrates excellent four-electron selectivity and delivers a kinetic current density of 14.7 mA cm −2 at 0.85 V in acidic medium. This dual-dimensional modulation strategy offers a paradigm for enhancing the accessibility of active sites for non-precious metal catalysts.
研究领域:
材料科学
·
催化化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ANTICANCER RESEARCH
·
2024
·Vol. 44
·期 7
·2861-2870
·
IF 1.6
YINA ZHANG,XIAOCEN NIU,YUANHE WANG,SHUTING BAO,PEIYUE JIANG,XIAORUI DONG
Background/Aim: Glutamine metabolism is crucial in cell proliferation, aging, and apoptosis across various cancer types. Existing research indicates that Sirtuin 4 (SIRT4), primarily located in mitochondria, modulates this process. This study aimed to clarify the regulatory relationship between SIRT4 and glutamine metabolism in cervical cancer. Materials and Methods: SIRT4 mRNA levels and their clinical correlation to cervical cancer were analyzed using the UALCAN database. Immunohistochemistry (IHC) was performed to assess SIRT4 protein expression in tissue samples from cervical cancer patients. Transient transfection was employed to create Hela and Siha cell lines with overexpressed SIRT4, mitogen-activated extracellular signal-regulated kinase (MEK), and glutaminase 1 (GLS1). The impact on cellular functions was studied using MTT, soft agar, transwell, and western blotting assays. Glutamate and ATP levels were also measured to evaluate metabolic changes. Results: Low levels of SIRT4 mRNA in cervical cancer tissues correlated with tumor metastasis and poor survival rates. Overexpression of SIRT4 led to suppressed cell proliferation, colony growth, and motility, along with significant down-regulation of GLS expression, a key contributor to glutamine metabolism. Additionally, SIRT4 overexpression resulted in the inactivation of the MEK/ERK/c-myc signaling pathway, while overexpression of MEK reversed these effects. Notably, the inhibitory effects of SIRT4 on cell proliferation, colony formation, migration, and invasion in Hela and Siha cells were significantly attenuated following GLS1 overexpression. Conclusion: SIRT4 acts as an anti-cancer agent in cervical cancer by inhibiting glutamine metabolism through the MEK/ERK/c-myc signaling pathway, providing a novel sight for cervical cancer therapy.
研究领域:
肿瘤学
·
分子生物学
·
细胞生物学
·
癌症代谢
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）