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
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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产品关联
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
·
化学
·
光催化
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产品关联
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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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2015
·
IF 1.56
Qunxing Huang,Xu Cai,Moussa Mallaye Alhadj Mallah,Yong Chi,Jianhua Yan
The high concentration of heavy metals in solid wastes may cause serious pollution during thermal treatment. We have investigated, theoretically and experimentally, the effects of several important flue gas species and mineral sorbents on the partitioning behaviour of four major heavy metals (cadmium, lead, zinc and copper) which are often present in municipal solid waste (MSW). Their concentrations in bottom ash, fly ash and flue gas were quantified when model MSW samples were treated thermally under different conditions. The evaporation ratio of the four metals, excluding Cu, increased with decreasing oxygen concentration. The presence of HCl promotes heavy metal evaporation by preventing the formation of stable metallic species, especially for Zn (evaporation of more than 20%). An increase in oxygen concentration has a negative influence on the effect of HCl. In the presence of SO2, Cd and Pb exhibited a higher evaporation ratio, while Zn and Cu were insensitive to the change. SO2 also inhibits Cd vaporization in an oxidative atmosphere. The effect of NH3 on reducing the metal volatilization rate was established indirectly. Calcium oxide addition enhances metal evaporation except for that of Zn (which shows a decrease of 38%). Although desulphurization by calcium injection decreases the volume of acid gas, calcium affects heavy metal pollution control adversely. The presence or addition of SiO2- or Al2O3-containing minerals can lead to the formation of stable metallic salts. This may favour the control of Cd, Pb, Zn and Cu volatilization up to 13%, 50%, 17.5% and 19%, respectively.
研究领域:
环境科学
·
废物处理
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DOI
PubMed
高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Hai-Min Shen,Lei Liu,Bei Qi,Meng-Yun Hu,Hong-Liang Ye,Yuan-Bin She
Non-solvent and non-additive oxidation of secondary benzylic C–H bonds to aromatic ketones utilizing simple metalloporphyrins as catalysts and O 2 was investigated systematically. Based on systematical studies on reaction parameters, such as the structures of porphyrins, the types of central metals, the amount of catalyst, the pressure of oxygen, and the temperature, most aromatics with secondary benzylic C–H had been converted efficiently and selectively to their corresponding aromatic ketones catalyzed by the optimized metalloporphyrin catalyst T(2,3,6-triCl)PPCo. And the selectivity towards aromatic ketones reached up to 80 %–95 % with acceptable conversions in lower catalyst-loading (2.4 × 10 −3 %, mol/mol). The highest selectivity was achieved for substrate 1,2,3,4-tetrahydronaphthalene with the selectivity of 95.0 % in the conversion of 46.3 %. The superior catalytic performance of T(2,3,6-triCl)PPCo could be mainly ascribed to its excellent plane structure, superior ability for electron transfer and low positive charge around the central metal. All of above properties promoted the formation of catalytic active species high-valence cobalt-oxo complexes, and facilitated the approach of substrates to the catalytic active centers. This work presented an optimized balance among higher selectivity, milder conditions, lower catalyst-loading, and simpler catalysts compared with current documents, which was not only an efficient, practical and significant strategy to functionalize the widely available aromatics possessing secondary benzylic C H with high efficiency and selectivity under milder conditions, but also an important instance in the effective functionalization and utilization of other C H bonds employing optimized catalytic systems based on metalloporphyrins.
研究领域:
有机化学
·
催化化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yingying Zhang,Qiang Huang,Ruoting Wang,Xinjie Du,Yu Yu,Zhe Chen
Modulating the coordination environment of single-atom catalysts (SACs) and designing architectures to maximize the exposure of active sites are pivotal strategies for enhancing peroxymonosulfate (PMS) activation. The fabrication of single-atom‑iron catalysts on support with particular coordination is essential but still remains challenge. Herein, we proposed the construction of single-atom‑iron embedded in graphitic carbon nitride nanosheets (SA-Fe@C 3 N 4 ) catalyst. The layer-confined synthesis strategy realized the loading of single-atom irons and ultrathin C 3 N 4 nanosheet formation in the interlayer of layered template RUB-15. XANES analysis corroborated that the isolated iron atoms are coordinated with three nitrogen and one oxygen atoms (Fe-N 3 O 1 ). Notably, the single iron atoms within the SA-Fe@C 3 N 4 matrix serve as the predominant active sites for PMS activation. The catalyst exhibited exceptional activity for the degradation of sulfamethoxazole (SMX), achieving a mass-normalized rate constant ( k Fe ) of 1.54 × 10 5 min −1 mol −1 with high selectivity toward 1 O 2 /•O 2 − .Theoretical calculations revealed that the Fe-N 3 O 1 moiety accelerated the PMS adsorption and reduced energy barriers for the activation of PMS, thus produce key *O intermediate SO 5 •- and form 1 O 2 /•O 2 − with nearly 100% selectivity. This study supplied a simple avenue to fabricate single-atom‑iron on C 3 N 4 with regulated coordination for wastewater treatment.
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Hao Liu,Siqing Cheng,Jianjun Chen,Xiaoping Chen,Shangchao Xiong,Fang Huang,Houfeng Liu,Junhua Li,Chuanzhi Sun
Mitigating industrial nitrous oxide (N2O) emissions is critical for climate action, yet developing efficient low-temperature N2O decomposition catalysts under O2-containing conditions remains challenging. The weak oxygen–support interaction leads to unsatisfactory N2O decomposition performance in the supported Co3O4/CeO2 catalyst. This study aims to enhance the electronic oxide–support interaction in the Co3O4/CeO2 catalyst through Zn doping, thereby improving its catalytic performance for N2O decomposition under O2-rich conditions. The results demonstrate that, in the presence of 5% O2, the activation energy of the catalyst sharply decreases from 117.5 to 60.4 kJ·mol–1 after Zn doping (Co2.4Zn0.6O4/CeO2). Additionally, the doped catalyst exhibits strong durability to the O2 + H2O + NOx impurity gas components. Advanced spectral characterization and density functional theory calculations reveal that Zn doping modulates the geometry and electronic structure of active cobalt sites, optimizing the adsorption and activation capabilities of N2O molecules. This study elucidates the mechanism of N2O decomposition over the catalysts and establishes a clear structure–activity relationship between the atomic-scale configuration of active sites and their performance. These findings provide critical insights for designing efficient supported oxide catalysts through targeted doping strategies and offer new perspectives for developing highly efficient and low-energy N2O decomposition catalysts.
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Kai Li,Junqi Cai,Yue Tao,Yunhe Xing,Zuchao Zhu,Zhiqiang Lu,Xuming Zhang
The direct conversion of methane into the value-added chemical methanol using molecular oxygen was investigated via plasma catalysis under mild condition. An efficient synergistic effect between plasma and catalyst was achieved using an oxygen vacancy-rich ZnO/Al 2 O 3 catalyst. A high methanol selectivity of 48.5 % and a high synergy factor of 2.1 could be achieved simultaneously over ZnO/Al 2 O 3 R300 catalyst. The presence of oxygen vacancies played a crucial role in methanol formation. A close relationship between oxygen vacancy content and methanol selectivity was established. In situ DRIFT and optical emission spectra were employed to identify key intermediates, and a plausible reaction mechanism was proposed. The CH 3 and CH 3 O species were the key intermediates on the catalyst surface. The oxygen vacancy could efficiently adsorb the O radicals and accelerate the formation of CH 3 O species. This work offers insights into the rational engineering of efficient catalyst for plasma catalysis process.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zining Man,Hao Tian,Xingbao Zhu,Zhe Lü
One experiment in this study utilized the plasticizer succinonitrile and lithium salt LiTFSI to directly create an ionic liquid electrolyte, with an artificial solid electrolyte interface layer generated using fluoroethylene carbonate. The typical electrolyte exhibited an ionic conductivity of 10–3 S cm–1 at room temperature and an electrochemical window of up to 5.3 V based on electrochemical impedance spectroscopy and linear sweep voltammetry tests. This electrolyte system effectively addresses the issues of decomposition and deterioration of traditional organic electrolytes in Li–O2 batteries at high voltages (over 4.5 V), as well as the problem of direct oxidation of the anode caused by oxygen shuttling, thereby greatly improving the lifespan of Li–O2 batteries. Additionally, the electrolyte’s low volatility and flame retardancy allowed for reliable operation of the battery in an air atmosphere. A Li–O2 battery assembled with the novel electrolyte was capable of cycling in a pure oxygen atmosphere for more than 1000 cycles at a capacity density of 200 mA h g–1 and over 150 cycles at 500 mA h g–1. Even when connected to ambient air without an additional oxygen selective membrane (OSM), the battery can still cycle continuously for more than 350 and 150 cycles at these two kinds of capacity density.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Huiting Lin,Yichang Ma,Xiaocan Wang,Guiqin Yi,Aimei Zhu,Qinglin Liu,Qiugen Zhang
Ether-free proton exchange membranes (PEMs) based on aromatic polymers are considered as potential alternatives to perfluorosulfonic acid (PFSA) PEMs due to their low cost, less reactant crossing, exceptional chemical stability and outstanding thermal stability. Herein, a series of high-performance sulfonated poly(biphenyl alkylene) (BPSA-PT- x ) membranes with full carbon chain backbones were synthesized to investigate the effect of different ratios of hydrophobic components on membrane properties. Among the prepared membranes, the BPSA-PT-10 % PEM with the highest proton conductivity (311 mS cm -1 at 80 °C water) possessed excellent dimensional stability (in-plane swelling rate ≤19.7 %, through-plane swelling rate ≤24.9 %), mechanical properties (elongation at break: 89.8 % in wet state), thermal stability (glass transition temperature >450 °C) and low H 2 crossover (1.80 mA cm -2 ). Further, the assembled H 2 /O 2 fuel cell based on BPSA-PT-10 % PEM exhibited competitive performance with a peak power density of 2.62 W cm -2 . The developed poly(biphenyl alkylene)-based PEMs should have potential applications in hydrogen energy field.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
高影响因子
Food & Function
·
2016
·Vol. 7
·期 11
·4683-4692
·
IF 2.686
Fan Yuan-jing,Wei Wei,Luo Jian-ping,Jin Yu-xia,Dai Zi-ling
This study aimed to explore the effects of genistein on regulating the activation of UGTs via the Nrf2/Keap1 pathway and to elucidate the underlying mechanisms of detoxification and hepatic protection. Experiments monitoring genistein-induced protection against acetaminophen-induced cell damage were performed in L-02, HepG2 and Hep3b cells. The results of the MTT, AST, ALT, LDH, GSH and GSSG assays showed that genistein evidently protected the cells from acetaminophen-induced injury in a dose-dependent manner. The control cells were treated with 10 mM acetaminophen without genistein to compare with the effects of the combination of acetaminophen and genistein on the expression of UGT1A1, 1A6 and 1A9, Nrf2 and Keap1 mRNAs, as well as the expression of Nrf2 and Keap1 proteins, which were tested by western blotting. The results showed that the expression of the Nrf2 mRNA and protein increased; in contrast, the expression levels of the Keap1 mRNA and protein were obviously reduced by genistein in a dose-dependent manner. Meanwhile, the expression of the UGT mRNA was increased, and UGT1A9 exhibited the highest expression among the three UGTs. Accordingly, the residual acetaminophen content was obviously reduced and acetaminophen glucuronidation increased after 24 hours of treatment with genistein in a dose-dependent manner.
研究领域:
药理学
·
毒理学
·
细胞生物学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）