JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Chaoyang Sun,Fenglong Xiao,Di Wu,Gang Lian,Deliang Cui,Qilong Wang,Haohai Yu
Rechargeable Li-O 2 batteries show great potential due to their superior high energy density. However, the practical application is still limited by the sluggish kinetics, resulting in poor cycling performance and high overpotentials. Herein, highly dispersed Co nanoparticles embedded into porous N -doped carbon matrix (DCo-NC) with carbon nanotubes is explored through the pyrolysis of a bimetallic leaf-shaped ZnCo-ZIFs. The evaporation of Zn species and porous carbon matrix derived from ZIFs prevents the Co nanoparticles aggregation, exposes more Co-N active sites and provides abundant pores. They facilitate Li + and electron transfer, prevent Co nanoparticles from deactivation and provide enough space for Li 2 O 2 , thereby accelerating oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) kinetics. Accordingly, the Li-O 2 batteries with DCo-NC cathode exhibit reduced overpotential, high discharge capacity (10,490 mA h g −1 at 100 mA g −1 current density) and improved cycling performance (258 cycles at 500 mA g −1 with a limited capacity of 500 mA h g −1 , 103 cycles at 500 mA g −1 with a limited capacity of 1000 mA h g −1 ).
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Small
·
2022
·Vol. 18
·期 23
·2200548
·
IF 15.153
Meng-Meng Pan,Yu Ouyang,Yong-Li Song,Lu-Qin Si,Ming Jiang,Xu Yu,Li Xu,Itamar Willner
The synthesis and characterization of Au 3+ -modified UiO-67 metal-organic framework nanoparticles, Au 3+ -NMOFs, are described. The Au 3+ -NMOFs reveal dual oxidase-like and peroxidase-like activities and act as an active catalyst for the catalyzed generation of O 2 •− under aerobic conditions or •OH in the presence of H 2 O 2 . The two reactive oxygen species (ROS) agents O 2 •− and •OH are cooperatively formed by Au 3+ -NMOFs under aerobic conditions, and in the presence of H 2 O 2. The Au 3+ -NMOFs are applied as an effective catalyst for the generation ROS agents for antibacterial and wound healing applications. Effective antibacterial cell death and inhibition of cell proliferation of Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E . coli ) bacterial colonies are demonstrated in the presence of the Au 3+ -NMOFs. In addition, in vivo experiments demonstrate effective wound healing of mice wounds infected by S. aureus , treated by the Au 3+ -NMOFs.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Qian Wang,Weiwang Qiu,Mengna Li,Na Li,Xiaoran Li,Xiaohong Qin,Xueli Wang,Jianyong Yu,Faxue Li,Liqian Huang,Dequn Wu
Diabetic wound treatment remains a major challenge due to the difficulties of eliminating bacterial biofilm and relieving wound hypoxia . To address these issues simultaneously, a multifunctional Dex-SA-AEMA/MnO 2 /PDA (DSAMP) hydrogel platform was developed with excellent biocompatibility and porous structure. The hydrogel could absorb the exudate, maintain humidity and permeate oxygen, which was prepared by encapsulating polydopamine (PDA) and manganese dioxide (MnO 2 ) into Dex-SA-AEMA (DSA) hydrogel by UV irradiation . With the addition of PDA , the DSAMP hydrogel was proved to eliminate the biofilm after NIR photodynamic therapy (PTT, 808 nm) irradiation at 54 °C. Furthermore, in order to mitigate hypoxia wound microenvironment, MnO 2 nanoparticles were added to convert the endogenous hydrogen peroxide (H 2 O 2 ) into oxygen (O 2 , 16 mg L −1 ). The diabetic wound in vivo treated by DSAMP hydrogel was completely healed on 14 days. It was revealed that the DSAMP hydrogel possessed a great potential as dressing for diabetic chronic wound healing.
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高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Yanjing Yun,Zhisong Lu,Xiaodan Jiao,Peng Xue,Wei Sun,Yan Qiao,Yang Liu
Relationship between mycotoxin-induced hormesis and reactive oxygen species (ROS) has not been systematically investigated due to the lack of an effective analysis method. To monitor cellular release and intracellular level of O 2 ·− , carboxymethyl cellulose-Mn 3 (PO 4 ) 2 nanocomposite was synthesized to fabricate an electrochemical biosensor, which selectively detects O 2 ·− over the range of 57.50 nM ∼ 2.95 μM (R 2 = 0.99) with the sensitivity of 78.67 μA μM −1 cm −2 and the detection limit of 8.47 nM. Transient exposure to zearalenone (ZEA) induces the enhancement on cell viability, immediate O 2 ·− release from cells, and reduction of intracellular O 2 ·− level. After post-treatment culture, intracellular O 2 ·− initially increases to a high level and then decreases to the normal level. Concurrently, the ZEA-induced hormesis disappears. Based on the findings, we propose a mechanism, involving the ROS release, increase of succinate dehydrogenase activity and recovery of intracellular ROS, to explain the occurrence and disappearance of hormesis in intestinal porcine enterocytes.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Hongyong Zhao,Ting Song,Xiaoli Ding,Ruyi Cai,Xiaoyao Tan,Yuzhong Zhang
Membrane technology for O 2 /N 2 separation is a mature industrial unit. Membranes with excellent permeation-separation performance are still one of the critical requirements. The cobalt-based compounds have been well known for their good affinity for O 2 , which can facilitate O 2 transfer and improve the O 2 /N 2 selectivity in membranes. The cobalt-based compounds, moreover, have a magnetic responsive effect, which can lead to a further improvement in O 2 /N 2 separation under a magnetic field. A class of PIM-1 mixed matrix membranes (MMMs), containing cobalt-based ionic liquid (CILs)@polyarylate (aromatic polyester) (PAR) (core-shell) composite nanospheres (CILs@PAR (c-s) CNPs), were prepared. Chemical compositions of CILs@PAR (core-shell) CNPs were determined by Fourier transform infrared spectroscopy (FTIR). Morphologies and structures of CILs@PAR (core-shell) CNPs were observed by transmission electron microscopy (TEM). Gas adsorption properties of CILs@PAR (core-shell) CNPs were tested. Thermal properties of the (CILs@PAR (c-s) CNPs)/PIM MMMs were investigated by simultaneous thermal analysis (TGA-DSC). Gas permeation-separation performances of the (CILs@PAR (c-s) CNPs)/PIM MMMs were also reported. Compared with the original PIM-1 membrane, the (CILs@PAR (c-s) CNPs)/PIM MMMs display higher O 2 /N 2 selectivity because of cobalt-based ionic liquid as O 2 carrier, coupled with a reduction in O 2 permeability. With increasing the content of the CILs@PAR (c-s) CNPs, the O 2 /N 2 selectivity increases, and the O 2 permeability decreases. It is also found that, as a magnetic field on the MMMs, the O 2 /N 2 selectivity further increases; and it increases more, as a higher content of CILs@PAR (c-s) CNPs. Therefore, the (CILs@PAR (c-s) CNPs)/PIM MMMs exhibit excellent O 2 /N 2 selectivity of ∼5 coupled with good O 2 permeability of ∼140 Barrer under a 180 mT magnetic field and show great potential for air separation.
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Journal of Materials Chemistry A
·
2019
·Vol. 8
·期 1
·259-267
·
IF 10.733
Congcong Dang,Yu Wang,Biao He,Weibin Zhang,Feng Dang,Hongchao Wang,Yong Du
Searching for highly efficient and low cost electrocatalysts is an urgent challenge to provide high capacity and long cycle life Li–O2 batteries (LOBs). In this work, the highly efficient electrocatalytic properties of MoSi2 were first demonstrated using particles prepared by a solid–state reaction method. The surface was activated, playing a dominant role in the electrocatalytic performance. After acid etching to remove SiO2 impurities arising from the surface oxidation, MoSi2 exhibited excellent bifunctional electrocatalytic properties for LOBs. Mo6+ on the surface contributed to the initial low overpotentials of 0.45 V (3.2 V for the OER and 2.75 V for the ORR) and transformed into Mo4+ for a long cycle life. As a consequence, outstanding rate capabilities of 12 708 mA h g−1 at 100 mA g−1 and 10 794 mA h g−1 at 800 mA g−1, and excellent cycle durability of 215 and 90 cycles at a limited capacity of 1000 mA h g−1 at 200 and 500 mA g−1, respectively, were obtained for the MoSi2 cathode.
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RSC Advances
·
2019
·Vol. 9
·期 29
·16288-16295
·
IF 3.049
Shu-ying Zhen,Hai-tao Wu,Yan Wang,Na Li,Hao-sen Chen,Wei-li Song,Zhen-hua Wang,Wang Sun,Ke-ning Sun
Herein, hollow porous CuO–CuCo2O4 dodecahedrons are synthesized by using a simple self-sacrificial metal–organic framework (MOF) template, which resulted in dodecahedron morphology with hierarchically porous architecture. When evaluated as a cathodic electrocatalyst in lithium–oxygen batteries, the CuO–CuCo2O4 composite exhibits a significantly enhanced electrochemical performance, delivering an initial capacity of 6844 mA h g−1 with a remarkably decreased discharge/charge overpotential to 1.15 V (vs. Li/Li+) at a current density of 100 mA g−1 and showing excellent cyclic stability up to 111 charge/discharge cycles under a cut-off capacity of 1000 mA h g−1 at 400 mA g−1. The outstanding electrochemical performance of CuO–CuCo2O4 composite can be owing to the intrinsic catalytic activity, unique porous structure and the presence of substantial electrocatalytic sites. The ex situ XRD and SEM are also carried out to reveal the charge/discharge behavior and demonstrate the excellent reversibility of the CuO–CuCo2O4 based electrode.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qi Chen,Cheng Liu,Rui Liu,Yidong Hou,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of 2D/2D MoS 2 /Bi 2 WO 6 S-scheme heterojunctions consisting of ultrathin MoS 2 nanosheets (MS, 1.6 nm) and ultrathin Bi 2 WO 6 nanosheets (BWO, 1.5 nm) were developed for photocatalytic degradation of ciprofloxacin. The samples with 5 % mass ratio of MS (5 %MS/BWO) exhibits the almost complete degradation of ciprofloxacin (≈100 %) under visible light. It is evidenced that the formation of S-scheme heterojunction with close interfacial interaction facilitates the photoinduced carrier separation and the generation of surface acid sites. The activation of ciprofloxacin molecules is realized through the coordinately interaction of C-N and C=O with the surface W sites. Moreover, the OVs in BWO side is a convenient pathway for activated of O 2 , embodying in the generation of •O 2 − and •OH under visible light over photocatalyst. Such an association of charge transfer mechanism with coordination activation shows the enhanced photocatalytic performance toward ciprofloxacin. This work provides a motivation which designs an S-scheme heterojunction photocatalyst with the ability to activate the specific group in molecules to comprehend the degradation of antibiotics.
研究领域:
材料科学
·
环境科学
·
化学
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chaofan Zhang,Qiu Zhuang,Hao Wang,Xintong Ying,Ruoyang Ji,Daohu Sheng,Wei Dong,Aming Xie
Hexavalent chromium (VI) heavy metal contamination is considered a serious threat to human health and the environment. The photocatalytic reduction of Cr(VI) basically occurs in the acidic environment, severely limiting the application of photocatalysts for the reduction of Cr(VI). Therefore, we designed a microenvironment strategy to achieve efficient reduction of Cr (VI) under neutral conditions by introducing sulfonic acid onto the aromatic conjugated skeleton. A series of characterizations and experiments have shown that the sulfonated aromatic ring conjugated polymer (Arcp-SO 3 H) can efficiently remove Cr(VI) under neutral or even alkaline conditions. In neutral solutions, Arcp-SO 3 H has a rate constant of 0.054 min −1 within 90 min and has an efficiency of nearly 100 %, which is 16 times faster than before sulfonation (k = 0.0316 min −1 ). the Arcp-SO 3 H surpasses all organic polymers and most metal-based photocatalysts in the related field. The capture experiments have proved that •O 2 – is the main role of reducing Cr(VI), and e - is secondary, which is quite different from the mechanism reported in the previous literature. The efficiency of reducing Cr (VI) in the four-cycle experiment is still 96 %, which also proves that Arcp-SO 3 H has strong stability and reproducibility. Thus, Arcp-SO 3 H has great practical application potential in the treatment of wastewater, and microenvironmental strategies also offer new possibilities in the field of environmental remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理技术
·
光催化
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高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 13
·e202303633
·
IF 1.9
Mingyan Chen,Wentao Wang,Xinkai Feng,Dehua Zhang,Yao Zhang,Yucheng Liu
Graphical This work describes the application of a highly efficient catalyst (NH 2 -UiO-66-Mo) to the catalytic oxidation desulfurization process. NH 2 -UiO-66-Mo can greatly improve the efficiency of oxidative desulfurization The optimum operating conditions of NH 2 -UiO-66-Mo are investigated through experiments, which prove the excellent performance of the catalyst, and the reaction mechanism is further studied through a series of characterizations. A highly efficient oxidative desulfurization composite catalyst NH 2 -Uio-66-Mo has been prepared and applied in the catalytic oxidative desulfurization. It was elucidated that Mo 6+ could increase the oxygen vacancies and active sites on the catalyst and increase the pore size of UiO-66. Meanwhile, the removal rate of dibenzothiophene (DBT) reached 99.2 % after 60 min under optimal conditions and remained above 90 % after 5 cycles, showing the composite catalyst's remarkable catalytic performance and satisfactory reusability NH 2 -UiO-66-Mo. In addition, kinetic studies revealed that the desulfurization process can present a pseudo-first-order kinetic process. The apparent activation energy was 10.6 kJ/mol. Finally, in combination with oxides, possible oxidation pathways were identified.
研究领域:
化学工程
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材料科学
·
催化反应
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高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 31
·2404319
·
IF 27.4
Zongqiang Sun,Xiaodong Lin,Chutao Wang,Yanyan Tan,Wenjie Dou,Ajuan Hu,Jiaqing Cui,Jingmin Fan,Ruming Yuan,Mingsen Zheng,Quanfeng Dong
Lithium–oxygen (Li–O 2 ) batteries, renowned for their high theoretical energy density, have garnered significant interest as prime candidates for future electric device development. However, their actual capacity is often unsatisfactory due to the passivation of active sites by solid-phase discharge products. Optimizing the growth and storage of these products is a crucial step in advancing Li–O 2 batteries. Here, a fluorine-doped bimetallic cobalt-nickel oxide (CoNiO 2– x F x /CC) with an interlaced catalytic surface (ICS) and a corncob-like structure is proposed as an oxygen electrode. Unlike conventional oxide electrodes with a “single adsorption catalytic mechanism,” the ICS of CoNiO 2− x F x /CC offers a “competitive adsorption catalytic mechanism,” where oxygen sites facilitate oxygen conversion while fluorine sites contribute to the growth of Li 2 O 2 . This results in a change in Li 2 O 2 morphology from a surface film to toroidal particles, effectively preventing the burial of active sites. Additionally, the unique open architecture aids in the capture and release of oxygen and the formation of well-contacted Li 2 O 2 /electrode interfaces, which benefits the complete decomposition of Li 2 O 2 products. Consequently, the Li–O 2 battery with a CoNiO 2− x F x /CC cathode demonstrates a high specific capacity of up to 30923 mAh g −1 and a lifespan exceeding 580 cycles, surpassing most reported metal oxide-based cathodes.
研究领域:
材料科学
·
电化学
·
能源存储与转换
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高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Mingjie Huang,Bingyuan Xu,Ke Feng,Wei Xiang,Xiaohui Wu,Yiliang Lv,Tao Zhou
Microscale zero valent iron (ZVI) is a promising material for in situ water purification through O 2 activation, but its activity is hindered by the slow electron transfer rate caused by the shielding effect of the surface passivation layer. Herein, we introduce a synergistic strategy that combines an inorganic ligand, i.e., tetrapolyphosphate (TPP), with magnetic field (MF) to boost the O 2 activation efficiency of ZVI under neutral conditions. This approach has resulted in a 4.7-fold increase in the degradation rate of diclofenac (DCF) compared to the MF-unassisted system and a remarkable 22.0-fold improvement over an analogous system with MF and EDTA. Multiphysics simulations, batch experiments, and characterizations revealed that the enhanced degradation rate was not only attributed to the elevated magnetic gradient on the ZVI surface to enrich the paramagnetic O 2 and Fe ions, but also to the functions of TPP to suppress the annihilation of •OH and reduce the redox potential of Fe 2+ /Fe 3+ . Furthermore, a synergistic mechanism between MF and TPP that facilitates the detachment of the surface-bound Fe 3+ -TPP complex into the aqueous phase, thereby regenerating the surface active sites was elucidated. This study underscores the potential of the MF-TPP synergy as an effective strategy to enhance ZVI-based Fenton-like catalysis for pollutant remediation.
研究领域:
环境科学
·
材料科学
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