INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Qian-Qian Huang
A novel tetranuclear nickel(II)-flavonolate complex [Ni II 4 (fla) 4 (CH 3 O) 4 (H 2 O) 4 ] (flaH: 3-Hydroxyflavone, flavonol) was synthesized. Its crystal structure and spectroscopic features have been investigated in details by physicochemical methods and single crystal X-ray diffraction. Different from other mononuclear metal-flavonolate complexes, this complex demonstrates a cluster molecular structure which has four Ni II centers, and each Ni II centre is coordinated by a bidentate flavonolate, three methanol and a water molecule. The crystal of this complex is tetragonal crystal system: space group I 41/a, a = 24.4361(14), b = 24.4361(14), c = 12.7972 (14), α = β = γ = 90 ° , V = 7641.5 (12), Z = 4. The complex can react with O 2 , in other words, it has enzymatic reactivity just like enzyme-substrate model of quercetin 2,3-dioxygenase, and the reaction products are similar with the other reported enzyme-substrate models.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 6
·545
·
IF 4
Xiaohong Yao,Jian Zhang,Chao Long
This study explored how pore size engineering in Nb-Mn/MCM-41 catalysts affects plasma-catalytic toluene oxidation. Adjusting the pore diameter (2.49–3.98 nm) modulated metal-support interactions and oxygen dynamics, with pore expansion to 3.73 nm (M3) optimizing the Mn4+/(Mn2++ Mn3+) ratio (XPS: 36.8%), the amount of lattice oxygen species (O2-TPD: 0.222 mmol/g), and crystallite size control (1.5 ± 0.2 nm, TEM). Smaller pores (M1: 2.49 nm) enhanced toluene adsorption but limited active site accessibility, while oversized pores (M4: 3.98 nm) reduced oxygen storage capacity (0.600→0.412 mmol/g). The Nb-Mn/M3 catalyst achieved superior performance with 96.8% toluene conversion, 55.0% CO2selectivity, and 85.4% carbon balance, while minimizing organic byproducts (GC-MS). Mechanistic studies revealed pore-mediated oxygen storage-transport cycles as critical for decoupling adsorption and oxidation steps. This study reveals fundamental mechanisms linking pore architecture to plasma-catalytic synergy in toluene oxidation, offering critical insights for the systematic design of energy-efficient, plasma-catalytic systems targeting industrial VOCs remediation.
研究领域:
催化化学
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环境化学
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材料科学
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等离子体化学
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纳米技术
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表面科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Tong Zhou,Guohui Dong,Jiahao Geng,Kai Han,Chenyang Xiao
In this study, a novel Z-scheme + II-type ternary heterojunction nanocomposite was prepared by one-step solvothermal method using g-C 3 N 4 , FeS 2 and Fe 2 O 3 as raw materials. The successful preparation of this ternary heterojunction was confirmed by the structural analysis and the surface morphology study. Compared with g-C 3 N 4 , the ternary photocatalyst showed excellent photocatalytic performance for the degradation of tetracycline (TC). The enhancement of photocatalytic activity is mainly due to the increase of light absorption capacity, effective separation of carrier in space, and increase of electron transfer channels in this Z-Scheme + II-type composite system. The scavenger test and electron spin resonance spectroscopy show that O 2 − is the main oxidizing free radical in the photocatalytic system. Based on liquid chromatograph-mass spectrometer, a possible degradation pathway of TC was proposed. This study opens up a new idea for the design and synthesis of efficient Z-Scheme + II-type photocatalysts for environmental purification.
研究领域:
环境科学
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材料科学
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化学
·
光催化
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 8
·4880-4889
·
IF 12.732
Wei Wu,Wang Lin,Hongjiang Chen,Keyan Wei,Zhitong Li,Haitao Yang,Mingxian Liu,Huaicheng Xiang,Libo Deng,Lei Yao
The development of high-performance solid-state batteries (SSBs) that integrate high safety with high energy density has long been pursued. However, conventional lithium-containing anode materials are unable to balance these two requirements, thereby necessitating the exploration of lithium-free anodes for SSBs. In the current study, a core–shell lithium-free α-Fe2O3@TiNb2O7 (TNO) nanofiber composite is synthesized and applied as an SSB anode. The confinement effect from the hollow TNO nanotubes on the encapsulated α-Fe2O3 nanoparticles can buffer the volume-change crushing during charging/discharging, leading to robust structural stability. Moreover, the high rate capability of TNO and high capacity of α-Fe2O3 work synergistically to provide superior electrochemical performances. The prepared α-Fe2O3@TNO composite delivers twice the reversible capacity (625 mA h g−1 at 0.1 A g−1) of pristine TNO as well as a remarkably prolonged cycle life (500 cycles with 79.2% capacity retention) and an improved rate performance (305 mA h g−1 at 3 A g−1) compared with those of α-Fe2O3, making this composite the most efficient TNO-based anode material ever reported. By pairing the composite with the high-energy Li[Ni0.8Co0.1Mn0.1]O2 (NCM811) cathode, the SSB full cell exhibits a high energy density of 400 W h kg−1. These results demonstrate the feasibility and great potential of the proposed lithium-free anode material in SSBs for practical applications.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 11
·2321-2330
·
IF 5.344
Lufei Ouyang,Xiaoyu Mu,Junying Wang,Qifeng Li,Yalong Gao,Haile Liu,Si Sun,Qinjuan Ren,Ruijuan Yan,Jingya Wang,Qiang Liu,Yuanming Sun,Changlong Liu,Hua He,Wei Long,Xiao-Dong Zhang
Free radical-induced oxidative damage and nitrosative stress have been identified as key factors in neuroinflammation responses after traumatic brain injury (TBI), with which reactive oxygen and nitrogen species (RONS), especially nitrogen signaling molecules, are strongly associated. Here, we prepared ultrasmall carbon dot (CD) by using a simple and facile method. In vitro assessment experiments show that the antioxidative CD exhibits an ultrahigh target-scavenging effect for nitrogen signaling molecules, especially the highly reactive ˙NO and ONOO−. However, CD can only partially eliminate conventional oxygen radials such as O2˙− and ˙OH, indicating CD has a preference for RNS modulation. Moreover, in vitro cell experiments and in vivo mice experiments reveal that CD can reduce the reactive oxygen species (ROS) level and lipid peroxidation, enhance superoxide dismutase (SOD) activity and GSSG level, and further improve the survival rate of neuron cells and TBI mice. These results declare that antioxidative CD could serve as an effective therapeutic for TBI.
研究领域:
神经科学
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药理学
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材料科学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yunxiang Bai,Xinxue Qiu,Deqiang Chen,Junwei Zheng,Liangliang Dong,Chunfang Zhang
Magnetic mixed matrix membranes (MMMs) show great potential for enhancing O 2 /N 2 separation efficiency by leveraging the inherent magnetic property differences between O 2 (paramagnetic) and N 2 (diamagnetic). However, one of the major challenges is the establishment and precise control of magnetic channels between magnetic fillers and polymer matrix. To address this issue, herein, ZIF-8 wrapped Fe 3 O 4 nanoparticles (Fe 3 O 4 @ZIF-8) were synthesized using a step-by-step assembly method, and then integrated into polymer of intrinsic microporosity (PIM-1) matrix to develop MMMs with well-defined magnetic channels for O 2 /N 2 separation. In comparison with Fe 3 O 4 , Fe 3 O 4 @ZIF-8 nanoparticles exhibited significantly enhanced compatibility with the polymer matrix, thereby facilitating uniform dispersion and improving interfacial adhesion. Gas permeation experiments revealed that the magnetic PIM-1/Fe 3 O 4 @ZIF-8 MMMs demonstrated enhanced O 2 /N 2 separation performance due to the combined effects of magnetic responsiveness and the presence of ZIF-8 magnetic channels. Under a magnetic field strength of 56mT, the magnetic MMM with a 4 wt% loading of Fe 3 O 4 @ZIF-8 exhibited optimal O 2 /N 2 separation performance with O 2 permeability of 710 Barrer and O 2 /N 2 selectivity of 3.64. These values represented a significant improvement of 42% and 24%, respectively, compared to pure PIM-1 membrane. Moreover, the simultaneous improvement of permeability and selectivity enabled the achievement of Robeson’s 2008 upper bound for O 2 /N 2 separation, underscoring the great potential of Fe 3 O 4 @ZIF-8 nanoparticles for designing magnetic MMMs with favorable structural attributes and exceptional separation efficiency.
研究领域:
材料科学
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化学工程
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shengqi Ding,Liang Wu,Xianxia Yuan
Electrocatalysts with appropriate electron coupling toward LiO 2 intermediates can exhibit superior oxygen reduction/evolution reaction kinetics in Li-O 2 batteries (LOBs). In this work, a charge redistribution strategy has been developed by constructing NiS/MoS 2 heterostructure nanosheet self-assembled hollow microspheres with an internal electric field to regulate the interaction with LiO 2 and then improve the electrochemical performance of LOBs. Density functional theory calculations and physicochemical characterizations reveal that the difference of work functions between NiS and MoS 2 promotes the electron redistribution in heterointerface via built-in electrical field, leading to increased electron density of interfacial Ni atom, thereby enhancing its electron coupling toward LiO 2 intermediates and promoting one-electron oxygen reduction/oxidation reaction kinetics. As a result, the NiS/MoS 2 -based LOBs exhibit evidently higher discharge capacity and much better cycling performance than the batteries using NiS and MoS 2 . This work provides a reliable charge redistribution strategy induced by build-in electric field to design efficient catalysts for LOBs.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Yang Zhan,Shao-hua Luo,Jian Feng,Lin Zhang,Xin Liu,Qing Wang,Ya-hui Zhang
The lithium-oxygen batteries (LOBs) have gained extensive interest in the past decade, but are plagued by slow reaction kinetics and induced large-voltage hysteresis. Therefore, developing extremely capable catalysts to enhance catalytic behavior and mitigate oxidation-reduction overpotential of LOBs is of huge challenge and significance. Attributable to their economically friendly and great activity, transition metal oxides (TMO) have incurred lots of attention as alternative electrocatalysts to replace the currently used noble metal-based catalysts. In this work, we fabricate a highly efficient TMO (the MIL-88A heated at 500 °C under protective flow, M8-Fe 3 O 4 @NC-500) electrocatalyst as advanced cathodes, which attributed to its unique structure, numerous dendritic-shaped carbon layer was anchored inplane into the micrometer-long spindle-shaped prisms with evenly distribution and contains abundant Fe–N/Graphitic N active sites. Therefore, the LOBs (based on M8-Fe 3 O 4 @NC-500/AB cathode) deliver superior electrochemical performance with large specific capacities of 14866.1 mAh g −1 , low overpotentials (1.31 V), and steady cycling stability (553 cycles, limited 500 mAh g −1 , under 0.05 mA cm −2 ). Our work provides a novel vision to rationally design and synthesize a powerful TMO electrocatalyst (with the 2D carbon nanosheet coating) for the LOBs cathode.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
MOLECULAR PHARMACEUTICS
·
2025
·
IF 4.5
Xin Yue,Qian Lin,Xiaohang Liu,Zhaoyi Yu,Jiafeng Xu,Xuan Zhu,Jinyan Lin,Aijie Liu
The high intracellular glutathione (GSH) level, naturally hypoxic conditions within the tumor microenvironment, and limited reactive oxygen species (ROS) generation pose significant obstacles to the effectiveness of sonodynamic therapy (SDT). Overcoming these barriers through depletion of GSH and relieving hypoxia offer a promising strategy to enhance SDT effectiveness. Herein, we developed a dendritic tetra-sulfide-bridged mesoporous silica (DTSMO) that encapsulated both chlorin e6 (Ce6) and cerium via channel-limited in situ coordination and is subsequently cloaked with the macrophage cell membrane (MCM) to facilitate efficient reactive oxygen species (ROS)-based therapy via multispecies enzymatic activities. First, this nanosystem exhibited Ce(IV) ions to mimic catalase (CAT)-like activity, converting H2O2 into O2, thereby effectively alleviating tumor hypoxia. Meanwhile, the nanosystem possessed Ce (III)-based peroxidase (POD)-like activity, enabling the conversion of H2O2 into hydroxyl radicals (•OH) while simultaneously depleting GSH. Both in vitro and in vivo experiments demonstrated that GSH depletion exerted a powerful supplementary effect on CDT and SDT, achieving a tumor inhibition rate of up to 96%, without affecting normal tissues during treatment.
研究领域:
纳米医学
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癌症治疗
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活性氧
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酶模拟
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生物材料
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DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Qixin Shi,Yingqun Nian,Yang You,Ziyan Li,Yunqi Li,Ran Zhao,Zhengzhi Chen,Tianhang Huang,Bing Hu
Edible bioplastics offer a possible approach with great potential to address the challenges of plastic and microplastic crisis and the issue of food waste. In the present study, in situ, induction of fibrillation of legume proteins within chitosan matrix is found to form edible bioplastic films with a high CO 2 /O 2 selectivity coefficient of ≈130. Desirable mechanical properties, including a high elongation at break of ≈230%, are realized to fabricate shopping bags, which can be filled with 5 kg of fruits. An atmosphere with a high CO 2 content and low O 2 concentration is spontaneously achieved after strawberries are packaged with the films and ≈85% of the fruits are edible after 9 days. The contents of CO 2 in the equilibrium state and the percent of edible fruits are positively correlated with the CO 2 /O 2 selectivity of the films. By comparison of the edible bioplastic films made from mung bean protein (MP) and pea protein (PP), the fibrillation capability of legume proteins and the heterogeneity in polydisperse diameters of the protein fibrils and chitosan are demonstrated to make great contributions to the dense microstructure, leading to the strong mechanical properties and high gas selectivity of the films. The structure-property relationship is elucidated for high-performance bioplastics films.
研究领域:
材料科学
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食品科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Bei Ren,Ziqian Meng,Bixian Zhang,Sihao Jian,Chufei Cheng,Jiadong Hou,Ruixin Hao,Bo Li,Yang Miao,Chao Ma,Weihua Ji
High-entropy fluorite oxide ceramics are promising candidates for spacecraft applications due to their excellent high-temperature thermal-mechanical properties. In this work, four kinds of high-entropy fluorite oxide ceramics ((ZrHfCeYEr) (1-x)/5 Ti x )O 2-δ (HEFOs, x = 0, 0.025, 0.05, 0.075) with different Ti 4+ contents were successfully synthesized through solid-state reaction method with conventional sintering. They all exhibited phase stability when annealed at 1500 ℃ for 20 h. When the content of Ti 4+ was increased to x = 0.075, the thermal conductivity reduced to1.34 W·m −1 ·K −1 at 1100 ℃, and the hardness and elastic modulus increased to 14.01 GPa and 205.70 GPa, respectively. Furthermore, the cyclic thermal shock resistance of HEFOs at different temperatures was investigated. The initial flexural strength reached 219.03 MPa when the content of Ti 4+ was increased to x = 0.075. After 60 thermal shock cycles at 1200 ℃ and 1500 ℃, the residual strength ratios were 97.56 % and 83.36 %, respectively. The results of this study establish the foundation for future applications of high-entropy fluorite oxide ceramics in spacecraft hot-end components.
研究领域:
材料科学
·
航天工程
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DOI
高影响因子
TALANTA
·
2026
·
IF 6.7
Chao Lu,Xue Fan,Fengna Xi,Yucheng Zhou
Sensitive and parallel individual detection of multiple tumor biomarkers is critical for early diagnosis and therapeutic monitoring of pancreatic cancer. Herein, a ternary electrochemiluminescence (ECL) system was developed by employing nanochannel-confined cerium dioxide (CeO 2 ) nanozyme as co-reactant enhancers for the luminol-dissolved oxygen (DO) system, enabling parallel individual immunoassays of carcinoembryonic antigen (CEA) and carbohydrate antigen 199 (CA199). Vertically-ordered mesoporous silica film (VMSF) was rapidly grown on an indium tin oxide (ITO) electrode, forming nanochannel array with thickness of 97 nm and diameters of 2.7 nm. CeO 2 nanozyme was synthesized in situ within the VMSF nanochannels via electrochemical deposition. Transmission electron microscopy (TEM), high-angle annular dark-field scanning TEM (HAADF-STEM), and energy-dispersive X-ray spectroscopy (EDX) elemental mapping confirmed CeO 2 nanozyme was confined in nanochannels with high dispersion. CeO 2 nanozyme exhibited peroxidase-like catalytic activity and enhanced the ECL intensity of the luminol-DO system by 13.9-fold under near-neutral conditions through catalysis of both oxygen reduction and luminol oxidation. After derivatization of the VMSF outer surface with epoxy groups, antibodies specific to CEA or CA199 were covalently immobilized to construct two immunorecognition interfaces. Target binding formed antigen-antibody complexes, increasing interfacial resistance and hindering diffusion of the ECL emitters, enabling a signal-off immunoassay mode. The resulting immunosensors displayed wide detection linear ranges from 0.1 pg mL −1 to 100 ng mL −1 for CEA and 0.1 × 10 −3 mU mL −1 to 1.0 × 10 4 mU mL −1 for CA199, with limit of detection (LOD) of 1.3 fg mL −1 and 0.5 × 10 −4 mU mL −1 , respectively. Both immunosensors exhibited good selectivity, reproducibility, and storage stability.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）