NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 8
·3936-3944
·
IF 3.3
Binxiong Guang,Yiwei Zhang,Yahui Xiao,Miaojun Su,Yong Liu
To bridge transition metal complexes and heterogeneous catalysts for allylic oxidation of cyclohexene to 2-cyclohexene-1-one with O2 under mild conditions, Cu(II) coordinated N-bearing heteropolyacid-based poly(ionic liquid)s (Cu-PDVD-PW) were herein synthesized as novel heterogeneous catalysts. The physicochemical properties of the catalysts were investigated by BET, TG, XPS, FT-IR and SEM/EDS analysis. The results indicated that the as-prepared Cu-PDVD-PW catalyst inherited appreciable mesopores and excellent thermal stability from the N-bearing poly(ionic liquid)s, which could increase the mass transfer rate and provide more accessible active sites. Significantly, the Cu2+ cations were homogeneously and stably coordinated on the N-bearing poly(ionic liquid)s, which greatly improved the catalytic performance for cyclohexene oxidation toward 2-cyclohexene-1-one with O2 under mild conditions. Specifically, the 3% Cu-PDVD-PW catalyst exhibited 75.9% conversion of cyclohexene with a selectivity towards 2-cyclohexene-1-one of 45.5% and no activity loss within five cycles under the optimum reaction conditions.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Dan Li,Changyan Zhu,Min Zhang,Ying Wang,Ziye Kang,Yulong Liu,Jun Liu,Jia Liu,Haiming Xie
How to develop a homogeneous redox mediator (RM) towards both ORR and OER and how to prevent the shuttle effect are two main issues for Li-O 2 batteries thus far. Here, we firstly report 1,2-dimethyl-3-propylimidazolium iodide (DMPII), which serves multiple functions as a RM for discharge capacity promotion, a RM for charge potential reduction, and a Li anode protector for shuttling suppression by in situ generating a “self-defensed” SEI layer. Benefiting from these advantages, a cell with DMPII displays a stable cyclability with a low terminal charge potential of ~3.6 V till the cell death, a considerable rate performance, and a good reversibility associated with Li 2 O 2 formation and degradation. Based on the experimental and density functional theory (DFT) calculation results, a working mechanism for a cell operation is also proposed. These results represent a promising progress in the development of multiple-functional RM for Li-O 2 batteries. Moreover, we expect that this work gives an insight into the in situ protection of Li metal anode for board applications ( e.g., Li-S batteries, all-solid-state Li-ion batteries, etc. ).
研究领域:
电化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Lin Liu,Feng Zhao,Fengji Ma,Liping Zhang,Suling Yang,Ning Xia
β-Amyloid (Aβ) peptides are believed to be important for the diagnosis and prognosis of Alzheimer's disease (AD) serving as reliable molecular biomarkers. In this work, we reported a simple and sensitive electrochemical strategy for the detection of total Aβ peptides using gold nanoparticles modified with Aβ(1–16)-heme (denoted as Aβ(1–16)-heme-AuNPs). Monoclonal antibody (mAb) specific to the common N-terminus of Aβ was immobilized onto gold electrode for the capture of Aβ(1–16)-heme-AuNPs. The anchored Aβ(1–16)-heme-AuNPs showed strong electrocatalytic O 2 reduction. Pre-incubation of the mAb-covered electrode with native Aβ decreased the amount of Aβ(1–16)-heme-AuNPs immobilized onto the electrode, resulting in the decrease of the reduction current of O 2 to H 2 O 2 . The competitive assay is sensitive and selective to Aβ peptides. The voltammetric responses were found to be proportional to the concentrations of Aβ ranging from 0.02 to 1.50 nM, and a detection limit of 10 pM was achieved. To demonstrate the viability of the method for the analysis of Aβ in real sample, artificial cerebrospinal fluid (aCSF) containing Aβ(1–40), Aβ(1–42) and Aβ(1–16) was tested. We believe that the method would offer a useful means for quantifying Aβ in a biological matrix, and be valuable in the design of new types of electrochemical biosensors for the detection of peptides and proteins.
研究领域:
生物医学
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神经科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Wensong Zou,Jing Li,Ranhao Wang,Jingyi Ma,Zhijie Chen,Lele Duan,Hongwei Mi,Hong Chen
Herein, we converted spent LiFePO 4 battery to the sea urchin-like material (SULM) with a highly efficient and environment-friendly method, which can contribute to building a zero-waste city. With SULM as a Fenton-like catalyst, a highly-efficient degradation process was realized for organic pollutants with interface and solution synergistic effect. In our SULM+NH 2 OH+H 2 O 2 Fenton-like system, NH 2 OH can effectively promote the interface iron ( Fe(Ⅲ)/ Fe(Ⅱ)) and solution iron (Fe(Ⅲ)/Fe(Ⅱ)) redox cycle, thus promoting the generation of reactive oxygen species (ROS). However, the ROS generation process and organic pollutants degradation pathway with the presence of NH 2 OH remains a puzzle. Here the detailed ROS generation mechanism and pollutants degradation pathway have been illustrated carefully based on experimental exploration and characterization. Therein, hydroxyl radicals (·OH) and singlet oxygen ( 1 O 2 ) are the main ROS for oxidizing and degrading organic pollutants. Notably, 1 O 2 can be converted from superoxide radicals (·O 2 ) in SULM+NH 2 OH+H 2 O 2 system. This study not only demonstrates the strategy of "trash-to-treasure" and "waste-to-control-waste" to simultaneously reduce the hazardous release from industrial solid waste and organic wastewater, it also provides new mechanistic insights for NH 2 OH mediated Fenton-like redox system.
研究领域:
环境科学
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材料科学
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化学工程
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废物管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2024
·Vol. 14
·期 36
·2401509
·
IF 24.4
Han Yu,Guoliang Zhang,Dongmei Zhang,Ruonan Yang,Xia Li,Xiuqi Zhang,Gang Lian,Hua Hou,Zhanhu Guo,Chuanxin Hou,Xiaoyang Yang,Feng Dang
Although lithium–oxygen batteries (LOBs) hold great promise as future energy storage systems, they are impeded by insulated discharge product Li 2 O 2 and sluggish oxygen reduction reaction/oxygen evolution revolution (ORR/OER) kinetics. The application of a highly efficient cathode catalyst determines the LOBs performance. The d-band modulation and catalytic kinetics promotion are important concept guidelines for the performance enhancement of cathode catalysts. In this work, the homogeneous in-plane distortion-derived synergistic catalytic capability of an Ag 2 Mo 2 O 7 catalyst with modulated d-band centers and promoted ORR/OER kinetics is demontrated. The uniform elongation of Ag─O bonds and compression of Mo─O bonds in (020) plane leads to d-band splitting and d-band center optimization and delivers improved adsorption behavior for high ORR/OER capability. Furthermore, the spatial and energy overlap of Ag d xz and O 2 anti-bonding π * orbitals facilitate electron injection during ORR process and reduce the energy barrier for charge transfer and O 2 desorption during OER process, accelerating the ORR/OER kinetics. As a result, the (020) plane-exposed Ag 2 Mo 2 O 7 cathode exhibits ultralong cycle stability of 817 cycles at 500 mA g −1 and large specific discharge/charge capacities of 15898/15180 mAh g −1 . This work provides facile concept guidance for optimizing catalytic capability through controlled lattice distortion in cathode catalysts for LOBs.
研究领域:
材料科学
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电化学
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能量存储
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催化
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2014
·
IF 5.825
Chuantao Hou,Dapeng Yang,Bo Liang,Aihua Liu
The power output and stability of enzyme-based biofuel cells (BFCs) is greatly dependent on the properties of both the biocathode and bioanode, which may be adapted for portable power production. In this paper, a novel highly uniform three-dimensional (3D) macroporous gold (MP-Au) film was prepared by heating the gold “supraspheres”, which were synthesized by a bottom-up protein templating approach, and followed by modification of laccase on the MP-Au film by covalent immobilization. The as-prepared laccase/MP-Au biocathode exihibited an onset potential of 0.62 V versus saturated calomel electrode (SCE, or 0.86 V vs NHE, normal hydrogen electrode) toward O2 reduction and a high catalytic current of 0.61 mAcm–2. On the other hand, mutated glucose dehydrogenase (GDH) surface displayed bacteria (GDH-bacteria) were used to improve the stability of the glucose oxidation at the bioanode. The as-assembled membraneless glucose/O2 fuel cell showed a high power output of 55.8 ± 2.0 μW cm–2 and open circuit potential of 0.80 V, contributing to the improved electrocatalysis toward O2 reduction at the laccase/MP-Au biocathode. Moreover, the BFC retained 84% of its maximal power density even after continuous operation for 55 h because of the high stability of the bacterial surface displayed GDH mutant toward glucose oxidation. Our findings may be promising for the development of more efficient glucose BFC for portable battery or self-powered device applications.
研究领域:
生物化学
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材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yuanhong Xie,Chenrui Liu,Dejian Li,Yun Liu
Herein, a novel composite of MIL-101(Fe) loaded with nitrogen doped carbon quantum dots (NCQDs/MIL-101(Fe), denoted as NQML), which can construct dual effect of photocatalysis and photo-Fenton for organic pollutants removal, was prepared by solvent impregnation method. Characterization methods proved that NQML had been synthesized successfully. Additionally, the adding volume of NCQDs could effectively influence the photocatalytic activities of NQML-x composites (x represents the adding volume of NCQDs) for tetracycline (TC) degradation, and NQML-8 exhibited the optimum photocatalytic performance among the studied catalysts upon visible light illumination under natural pH, which can completely degrade TC within 180 min. By comparison, the TC degradation kinetic constant in the system with NQML-8 was as 15.85 and 8.24 folds of that in the NCQDs and MIL-101(Fe) systems, respectively. The mechanism study proved that the enhanced photocatalytic performance of NQML was resulted from the visible light up-conversion property, electron-hole separation and transfer capacity of NCQDs. Meanwhile, NQML could not only produce h + but also lead to in-situ generation of O 2 - and H 2 O 2 by activation of O 2 under visible light. The generated H 2 O 2 could react with Fe(II) in MIL-101(Fe) to produce OH so as to construct a dual effect of photocatalysis and photo-Fenton in TC removal.
研究领域:
环境科学
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材料科学
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化学工程
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光化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Taoyi Lu,Xingmin Feng,Zhiqin Wen,Li Tang,Suzhen Kang,Jiyuan Huang,Gaoxiang Wei,Siyi Huang,Defeng Long,Sheng Wang
In this study, (Ce 0.2 Zr 0.2 La 0.2 Yb 0.2 Ln 0.2 )O 2- δ (Ln = Er, Y, Sm; labelled as H-Er, H-Y, H-Sm) high-entropy fluorite oxides (HEFOs) are designed by standard deviation and first-principles calculation. These HEFOs are subsequently synthesized via solid-phase reaction method, and the phase formation, microstructure, mechanical and thermal properties of the three samples have been systematically investigated. The results show that the three samples, exhibiting a single-phase fluorite structure, are successfully prepared after sintering at 1600 °C, and all the elements are uniformly distributed with no elemental segregation and agglomeration. The calculated δ of H-Er, H-Y and H-Sm are 0.3399, 0.3668 and 0.3458, respectively, so the chemical formula of three HEFOs are (Ce 0.2 Zr 0.2 La 0.2 Yb 0.2 Er 0.2 )O 1.6601 , (Ce 0.2 Zr 0.2 La 0.2 Yb 0.2 Y 0.2 )O 1.6332 and (Ce 0.2 Zr 0.2 La 0.2 Yb 0.2 Sm 0.2 )O 1.6542 , respectively. Additionally, the effects of rare earth ions (Er, Y and Sm) on the hardness, Young's modulus and thermal conductivity of HEFOs are analyzed. H-Y exhibits the highest hardness value and largest Young's modulus among the three HEFOs, primarily due to the largest mean acoustic velocity and cohesion energy in absolute value, smallest AGS and average bond lengths. The thermal conductivities ( κ ) of the three samples are only 1.465–1.598 W m −1 K −1 at 1000 °C. Furthermore, the thermal conductivities of the three samples are significantly lower than that of 8YSZ within the temperature range from 25 °C to 1000 °C, and H-Sm exhibits the lowest thermal conductivity in this temperature range. Consequently, they are anticipated to have promising applications in the field of thermal barrier coatings (TBCs).
研究领域:
材料科学
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固体力学
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计算材料学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Yuzhen Dang,Yurong Wu,Zhe Xu,Runguo Zheng,Zhiyuan Wang,Xiaoping Lin,Yanguo Liu,Sha Liu,Leijie Zhang,Dan Wang
P2-type manganese-based cathode materials are notable for their high theoretical capacity and open prismatic channels. However, rapid capacity decay caused by harmful irreversible phase transformations (P2-O2) and oxygen release in the high-voltage region (>4.2 V) limits their commercial application. Here, a co-doping strategy with lithium and niobium is proposed to enhance the structural stability at both room-temperature (RT) and low-temperature (LT) over extended cycles. The X-ray absorption near-edge spectra and first-principles calculations reveal that Li doping elevates the valence states of transition metals, thereby enhancing the reversibility of anionic redox reactions. Additionally, Nb doping leads to the formation of a rock-salt-like phase on the surface, which improves the stability of the electrode/electrolyte interface. In situ X-ray diffraction and differential electrochemical mass spectrometry show that Li and Nb co-doping prevents the P2-O2 phase transition, suppresses gas release, and enhances long-cycle stability. The P2-Na 0.67 Ni 0.24 Mn 0.64 Li 0.1 Nb 0.02 O 2 (NNMLNb) exhibits a reversible specific capacity of 127.4 mAh g −1 and 101.5 mAh g −1 at -20 °C and -30 °C, respectively. Remarkably, the sample cycles stably for 1200 cycles with a discharge capacity of 85 mAh g −1 , corresponding 90 % capacity retention. This work provides a novel strategy to improve the cycling life of sodium-ion batteries at both RT and LT.
研究领域:
能源材料
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电化学
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电池技术
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材料科学
·
固态化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jing Gong,Shunhua Wang,Jie Liu,Yaowen Zhang,Jiyao Li,Hao Yang,Kunneng Liang,Yi Deng
Periodontitis, a chronic inflammatory condition associated with bacterial infection, is the leading cause of tooth loss in adults. Pathogenic bacteria that persist in deep periodontal pockets with hyperglycemic levels following traditional manual debridement can contribute to a persistent local inflammatory microenvironment, posing a significant challenge and highlighting the critical need for improved therapeutic approaches. In addition, the anaerobic environment during these treatments is beneficial to the colonization of anaerobes and may amplify inflammatory responses. Herein, we designed a glucose oxidase (GOx)-coating MXene-SnS 2 bio-heterojunctions (MS@G bio-HJs) for multi-modal and effective treatment of anti-bacteria and anti-inflammatory. Upon the hyperglycemic nidus in periodontal pockets, GOx catalyzes the conversion of glucose into hydrogen peroxide (H 2 O 2 ). Subsequently, the breakdown of H 2 O 2 into hydroxyl radicals through Sn 2+ /Sn 4+ -involved Fenton-like reactions enables in situ liberation of oxygen (O 2 ), contributing to relieve local hypoxia. The proposed bio-HJs presents a satisfactory bactericidal capability with anti-bacterial rates of more than 99 % upon near-infrared irradiation, in virtue of multi-modal therapies including photodynamic, photothermal and chemodynamic treatments. Furthermore, in vivo assays utilizing infectious rat models demonstrated that the proposed bio-HJs exhibits high biocompatibility and capacity to alleviate hypoxia and reduce pathogenic virulence factors, potentially contributing to periodontal tissue regeneration. These findings suggest that the versatile bio-HJs could be a promising therapeutic candidate for treating infectious periodontal diseases.
研究领域:
牙科学
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生物材料
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纳米技术
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治疗学
✓ 已验证
产品关联
DOI
高影响因子
FITOTERAPIA
·
2024
·
IF 2.5
Ling Jiang,Cai-Bo Tian,Rui-Han Ye,Nian Shi,Xing-Chao He,Yun-Li Zhao,Xiao-Dong Luo
Drug-induced liver injury caused acute hepatic failure and hepatitis frequently. In this investigation, kakuol and asarinin reduced the levels of serum alanine transaminase (ALT), aspartate transaminase (AST) and malondialdehyde (MDA) dramatically, and ameliorated the pathological damage of liver tissues in APAP-induced mice. Furthermore, both compounds increased the viabilities of APAP-induced L-O2 cells and extracellular glutathione (GSH) levels accompanied significantly by reducing the level of intracellular ROS in vitro . In addition, HSP90AA1/CDK2/mTOR signaling pathway and five target proteins (CDK2, HSP90AA1, HRAS, MMP1, mTOR) were proposed from network pharmacology and molecular docking prediction, and then the up-regulation of protein expression of CDK2, mTOR and down-regulation of HSP90AA1, HRAS, MMP1 by kakuol and asarinin in western blotting supported their mechanism.
研究领域:
药理学
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分子生物学
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毒理学
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肝病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2020
·
IF 10.257
Zhe Hao,Xiaodong Lin,Jinjie Li,Yanliang Yin,Xia Gao,Shuo Wang,Yaqing Liu
Bacterial infection is a growing public health concern and causes a huge medical and financial burden. It is of significance to efficiently construct multifunctional platforms for bacterial point-of-care testing (POCT) and elimination. Herein, near-infrared (NIR) light-responded vancomycin-doped prussian blue nanoparticles (PB-VAN NPs ) with high efficient photothermal conversion was synthesized for binding, dual-mode portable detection, and elimination of bacteria. The PB-VAN NPs can bind to the surface of Gram-positive bacteria such as Staphylococcus aureus ( S. aureus ), forming complex of PB-VAN NPs / S. aureus . After being centrifugated, the suspension solution of PB-VAN NPs can stimulate perfluorohexane (PFH) to rapidly release oxygen (O 2 ) under NIR irradiation. Thus, the bacteria can be sensitively detected with portable pressure meter as signal reader, reporting a limit of detection (LOD) of 1.0 CFU mL -1 . On the other side, the sediment of PB-VAN NPs / S. aureus can be detected via thermal camera, reporting a LOD of 1.0 CFU mL -1 . Interestingly, the bacteria can be effectively inactivated with the local temperature elevation during temperature-based detection. The antibacterial efficiency reaches as high as 99.8%. The developed multifunctional nanoplatform not only provides a straightforward “mix-then-test” way for portable detection of bacteria with high sensitivity, also realizes high efficiency elimination of bacteria simultaneously. The developed strategy was further applied for promoting wound healing of bacteria-infected mice.
研究领域:
生物医学工程
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纳米技术
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细菌学
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即时检测 (POCT)
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光热治疗
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感染控制
✓ 已验证
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）