CELLULOSE
·
2024
·Vol. 31
·期 6
·4007-4023
·
IF 4.9
Xue Tong,Ma Ruijie,Zhang Xintian,Tao Wenwen,Wang Chaoxia,Yin Yunjie
Personal thermal management (PTM) textiles with heating or cooling capabilities are highly attractive because they offer individual comfort and contribute to lower energy consumption. However, due to the subjectivity of thermal comfort, developing adaptive and personalized PTM textiles remains a challenge. Here, we report a thermoresponsive cotton fabric (PMOG-cotton), which is prepared by a combination of ultraviolet-induced free radical polymerization and pad-dry-cure process. 2-(2-methoxyethoxy)ethyl methacrylate (MEO 2 MA) and oligo(ethylene glycol) methacrylate (OEGMA 475 ) are selected as thermoresponsive monomers, while glycidyl methacrylate (GMA) is chosen as the linking monomer for copolymerization. The lower critical solution temperature (LCST) of P(MEO 2 MA-co-OEGMA 475 -co-GMA) can be precisely regulated by adjusting the dosage of OEGMA 475 . Furthermore, PMOG-cotton demonstrates a reversible transition between hydrophobic and hydrophilic states in response to variations in external temperature (T > LCST, hydrophobic; T < LCST, hydrophilic). This transition can be sustained for a minimum of 5 cycles and 50 rubbing cycles. PMOG-cotton exhibits superior control over breathability and moisture permeability compared to raw cotton in response to temperature fluctuations. Compared to raw cotton, PMOG-cotton offers a 2.4 °C heating effect in cold environments and a 1.3 °C cooling effect in hot environments. This adaptive thermal management textile shows promise for delivering human thermal comfort in complex and dynamic environments.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lingfei Luo,Huimin Yang,Xiang Li,Kechen Zhou,Lu Tang,Huiyu Su,Liyan Chen,Chaofan Ma,Xiaoxia Wang,Dawen Zeng
The inert gas adsorption of outer oxygen atoms is becoming an important factor limiting the gas sensing activity of two-dimensional MoO 3 nanoflowers, which makes it necessary to modify the surface activity of MoO 3 nanoflowers. For a long time, the unique activity of Co atoms has attracted much attention in gas sensing. In this work, Co metal sites were introduced into MoO 3 defective nanoflowers (MoO 3 DNFs) by doping, which further improved the H 2 S gas sensing performance of MoO 3 DNFs. Based on H 2 S gas sensing experiment, the relationship between Co doping amount and gas sensing performance was constructed, and the optimal Co doping ratio was obtained. Finally, the adsorption reaction process of H 2 S gas molecules on MoO 3 -Co DNFs was simulated by DFT calculation, and the activation effect of Co metal sites on outer oxygen atoms was revealed.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiaojun Cai,Jiang Tian,Jingwu Zhu,Junpeng Chen,Lin Li,Chao Yang,Jiale Chen,Dongfan Chen
Photothermal therapy (PTT) and photodynamic therapy (PDT) have garnered much attention for effectively treating biofilm infections. However, even highly efficient PTT reagents and photosensitizers still require high concentration and irradiation doses to ablate biofilms due to their limited permeability in biofilms, while these attempts tend to cause severe tissue damage and inflammation. Herein, a CO-enhanced multi-mode synergistic antibacterial nanoplatform (ICG& [email protected] ) with controllable CO generation behavior, notably enhanced biofilm penetration, antibacterial, biofilm ablation, and anti-inflammatory activity was effectively developed to combat biofilm infections. ICG& [email protected] is constructed by physically encapsulating indocyanine green (ICG) and manganese pentacarbonyl bromide (MnBr(CO) 5 ) into a 2,2′-bipyridine-4-carboxylic (BPY)-modified peptide dendrimer-based nanogel (G3KBPY). ICG& [email protected] can rapidly generate massive quantities of CO under the co-driven effects of PTT and PDT. Notably, the generated CO not only promotes the biofilm penetration of ICG and enhances the antibacterial and biofilm eradication performance of PTT and PDT, but also significantly alleviates the inflammatory response caused by bacterial infection, PTT and PDT. The combination of CO, PTT, and PDT offers excellent biofilm ablation effects in treating urinary catheter infection and subcutaneous abscesses, accompanied by good biocompatibility. This study provides an efficient and safe multi-mode synergistic antibacterial strategy for combatting biofilm infections.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10300-10308
·
IF 3.288
Xiuqin Yang,Jing Jin,Zhuming Guo,Zhiyin Xiao,Naiwen Chen,Xiujuan Jiang,Yi He,Xiaoming Liu
In this study, five salts containing the same anion fac-[FeII(CO)3I3]− were prepared through the reaction of cis-[Fe(CO)4I2] with organic amines whose protonated forms, i.e., (EtNH3+), (PrNH3+), (BuNH3+), (PentNH3+), and (Et2NH2+), become the cations of the salts 1, 2, 3, 4, and 5, respectively. These aminium salts, which are soluble in water and polar organic solvents such as DMSO and methanol, were characterized by various techniques including X-ray single-crystal diffraction. These salts underwent solvolysis in both water and DMSO to release CO, following first-order kinetics. In DMSO, the decomposition of these salts proceeded via a significantly simpler mechanism without the involvement of radicals than that in water, and the CO-release rate of these salts was almost linearly related to the hydrophobicity (the logarithm of the oil/water partition coefficient P) of the amines. The CO-release rate was substantially faster in water and in addition to undergoing solvolysis, the anions generated an iodine radical, I˙. Due to the complicated decomposition of these salts in water, the CO-release proceeded in a two-stage manner. The iodine radical was found to be at least partly responsible for the cytotoxicity of these salts in water; this indicates that the proposed anion has potential for applications in cancer therapy.
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ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Limin Liu,Yong Wang,Xiaoliang Zhou,Yixuan Yang,Chao Ma,Yuan Li,Chen Wang,Xiaohong Zhao,Bin Li
A cermet fuel electrode Cu/Ce 0.6 Mn 0.3 Fe 0.1 O 2-δ (Cu/CMF) is proposed for a reversible solid oxide electrochemical cell (SOC) with CO/CO 2 as the shuttle. Cu is inert for the carbon deposition and CMF is electrochemically active for CO oxidation and CO 2 reduction. The electrode polarization resistances in CO at 700, 750 and 800 °C are 0.328, 0.207 and 0.155 Ω cm 2 , respectively, presenting high electrochemical activity towards CO oxidation. The maximal power densities can reach up to 303.3, 482.2 and 691.9 mW/cm 2 at 700, 750 and 800 °C, respectively. When the reversible SOCs are operated in solid oxide electrolysis cell mode, the polarization resistance of the electrolysis cell for pure CO 2 reduction at 800 °C has the minimal value of 0.126 Ω cm 2 at 1.8 V. At 2.0 V, the current densities can reach up to 0.584 1.219 and 2.204 A/cm 2 at 700, 750 and 800 °C, respectively. The durability of the cell in CO for as long as 200 h indicates the electrode has remarkable stability. And the short-term stability characteristics for CO 2 electrolysis at different voltages illustrate that the cell performs well below 2.0 V. The harsh reducing environment at 2.0 V may be detrimental to the Cu/CMF electrode.
研究领域:
电化学
·
能源材料
·
功能陶瓷
·
催化化学
·
可再生能源
·
电化学能量转换
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Journal of Water Process Engineering
·
2023
·
IF 7
Fangke Yu,Xiaochun Xu,Jing Yang
In this study, precursor ultrathin molybdenum disulfide nanosheets and ZIF-67 was selected to prepare Co and N co-doped porous carbon by the support of Mo (MoS 2 /Co@NPC) to activate peroxymonosulfate (PMS) for perfluorooctanoic acid (PFOA) degradation. The morphology, crystal form and composition of MoS 2 /Co@NPC are studied by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and other methods. In MoS 2 /Co@NPC/PMS process, PFOA was completely degraded in 180 min at pH 7, 0.3 g/L catalyst, 0.1 mM PMS and reaction temperature of 25 °C. The degradation efficiency was much higher than that in other systems. The oxidative species for PFOA degradation was studied using free radical quenching experiments and electron paramagnetic resonance (ESR) tests. SO −4 plays a major role in the degradation of PFOA, OH plays an auxiliary role, and 1 O 2 contributes the least. The effect of different types and positions of cobalt‑nitrogen and molybdenum atoms on the electrocatalytic activity was investigated by density functional theory (DFT) calculations. The co-doping of Co and N into carbon-based materials can synergistically enhance by Mo for the activation of PMS. The unsaturated S atoms on the surface of metal sulfides can trap protons to form H 2 S while exposing the reducing metal active site, which also accelerates the rate-limiting step of the Co 3+ /Co 2+ conversion. The core-shell structure of Co@NPC doped with Mo has the characteristics of improving the electron transfer ability of carbon, promoting the mass transfer of reactants, and preventing cobalt metal agglomeration and metal dissolution. The degradation pathways of PFOA were investigated and three possible pathways were proposed. In addition to PFOA, MoS 2 /Co@NPC-800/PMS system can also remove contaminant in pharmaceutical wastewater, indicating that the process has potential application value in practical wastewater treatment .
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 35
·期 8
·e6280
·
IF 4.105
Jinzhong Guo,Zhuming Guo,Zhiyin Xiao,Jing Jin,Xiuqin Yang,Yi He,Xiaoming Liu
Four new monoiron (II) tricarbonyl complexes with the amine bound, fac -[Fe(CO) 3 I 2 (NH 2 R)] (R = Et, 1 ; n Pr, 2 ; n Bu, 3 ; n Pent, 4 ), were reported using cis -[Fe(CO) 4 I 2 ] as the precursor. All the complexes 1 – 4 were structurally confirmed by various techniques such as ultraviolet–visible (UV–vis), Fourier transform infrared (FTIR), and nuclear magnetic resonance (NMR) spectra and elemental analysis of which complexes 1 and 2 are crystallographically determined. The reaction of the precursor with alkylamines proceeded in two main parallel pathways to form both aminium salts of fac -[Fe(CO) 3 I 3 ] − and the amine-bound complexes ( 1 – 4 ). Their dominances altered with the reaction time. These complexes in DMSO undergo quick decomposition with complex 1 as the relatively most stable one ( t 1/2 = 7.3 min) although they are stable in solid status. Unlike the triiodo anion and pyridinyl analogs showing severe cytotoxicity due to the generation of iodine radical during the decomposition, no iodine radicals were detected from the fac -[Fe(CO) 3 I 2 (NH 2 R)] complexes. Therefore, the cell viability of RT112 cells was not affected by the presence of the amine-bound iron complex ( 1 ) up to 100 μmol L −1 .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yuping Gai,Wei Deng,Junbo Hu,Dan Li,Wenshuo Xie,Xiang Li,Jingjing Zhang,Dewu Long,Fei Jiang
The preparation of stable electrocatalyst for oxygen evolution reaction is of the utmost importance to realize high performance water decomposition reaction . Metal-organic framework (MOF) nanostructures have become promising materials. Herein, we report three kinds of electrocatalysts with different structures and properties for the oxygen evolution reaction, which were constructed by using different binding sites of three kinds of ligands following a mechanism which involved only *O and *OH species as intermediates. CoFeBTC-MOF shows excellent overpotential η = 261 mV at 10 mA cm −2 (1.481 V vs. RHE), Tafel slope of 59.29 mV dec −1 and pretty excellent stability (48 h of continuous testing), making it become one of the best acid-resistant catalysts for oxygen evolution reaction. The DFT calculations show that there are different ways to transfer electrons . In addition, the coupling effect between Co and Fe metals is the key to regulate the electrocatalytic activity , confirming the cooperative catalysis mechanism with a reduced energy barrier.
研究领域:
材料科学
·
电化学
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Min Zhao,Ziang Zhao,Yuan Lyu,Wei Lu,Ming Jin,Tao Liu,Hejun Zhu,Yunjie Ding
Suitable metal–support interaction is of great significance for the supported Fischer–Tropsch catalyst. Herein, we synthesized a series of porous spinel MAl2O4 (M = Co, Mg, Zn) together with Al2O3, via a sol–gel method and used them as supports for the Co-based Fischer–Tropsch synthesis (FTS) catalyst to investigate the influence of metal–support interaction on Co dispersity, reducibility, and catalytic performance. The catalytic performance showed that 15Co/CoAl2O4 had the highest activity and C5+ selectivity, as well as favorable stability during 1000 h lifetime testing. The catalysts were characterized by physisorption, chemisorption, HRTEM, XPS, and TPSR. The results indicated that 15Co/CoAl2O4 showed weaker metal–support interaction than 15Co/MgAl2O4 and 15Co/Al2O3, which was considered as the key factor for its higher reducibility and CO dissociation ability, contributing to the higher CO conversion. The higher Co dispersity on CoAl2O4 resulted from the smaller particle size of Co species on CoAl2O4, contributing to the higher activity of 15Co/CoAl2O4 than that of 15Co/ZnAl2O4. The higher C5+ selectivity on 15Co/CoAl2O4 and 15Co/ZnAl2O4 than that on 15Co/MgAl2O4 and 15Co/Al2O3 was verified to benefit from the appropriate H2/CO adsorption ability, which was significantly affected by metal–support interaction.
研究领域:
材料科学
·
催化化学
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Nature Communications
·
2026
·
IF 18.1
Ren Lijuan,Hu Xiuli,Wang Shuyu,Shi Jiaqi,Gong Jiaxing,Wang Manyun,Zhou Ji,Wang Jianzu,Lv Xian-Wei,Bielawski Christopher W.,Geng Jianxin
Zinc−air batteries are promising devices for use in safe and cost-effective energy storage applications. However, their practical utility is hindered by sluggish oxygen evolution and oxygen reduction reactions. We show that hybridizing electronically coupled Co single atoms and a CoPd alloy within a three-dimensional macroporous N-doped carbon (CoPd/Co@3D NC) enables high-performance N 2 H 4 -assisted zinc−air batteries, where the oxygen evolution reaction is replaced with the thermodynamically more favorable hydrazine oxidation reaction. Experimental and theoretical data reveal that electronic coupling between the Co single atoms and the CoPd alloy mutually modifies their electronic structures, which, in turn, weakens oxygen adsorption on the Co single atoms and enhances N 2 H 4 adsorption on the Pd sites. The electronic-coupling effect accelerates the rate-limiting steps of the oxygen evolution and hydrazine oxidation reactions. Consequently, N 2 H 4 -assisted zinc−air batteries employing CoPd/Co@3D NC exhibit a small charging/discharging voltage gap of 0.52 V at 100 mA cm −2 , a peak specific power of 151 mW cm −2 , and a specific capacity of 810 mAh g −1 at 10 mA cm −2 ; these values are competitive when compared to those exhibited by conventional zinc−air batteries.
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POLYMER
·
2026
·
IF 5.1
Jiabo Wang,Changtong Song,Guochen Wang,Yutao Zhang,Xianhong Zhang,Wantai Yang
Synthesizing poly(vinyl chloride- co -butyl acrylate- co- vinyl versatate) ternary copolymer via suspension polymerzation • The ternary copolymer can achieve a damping temperature range of 15–65 °C and a high tan δ max around 1.15. • The ternary copolymer exhibites outstanding transparency and excellent elasticity. Polyvinyl chloride (PVC)-based damping materials are extensively utilized in low-temperature vibration attenuation owing to their excellent processability, mechanical properties, and cost-effectiveness. However, achieving both a broad damping temperature range and high mechanical ductility remains a significant challenge. To address this issue, this study synthesized ternary copolymers of vinyl chloride (VC) with butyl acrylate (BA) and various vinyl carboxylate monomers such as vinyl acetate (VAc), vinyl neononanoate (VV9), and vinyl neodecanoate (VV10) via suspension free radical copolymerization, aiming to systematically investigate the influence of alkyl side chain length and bulkiness on damping performance. The damping properties, thermal stability, and mechanical behavior of the resulting copolymers were evaluated through dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), and tensile testing. The remarkable results showed that the damping temperature range and loss factor are highly reliant on the content of BA and vinyl versatate structural units, as well as the side chain length of vinyl versatate. In detail, the PVC based ternary copolymers with 44% BA units and 7% VV10 units can achieve a damping temperature range of 15–65 °C and a high tan δ max around 1.15 at 1 Hz. While all copolymers maintained exceptional tensile strength about 20 MPa and ductility with an elongation at break exceeding 390%. Meanwhile, the damping materials with a vinyl versatate units either VV9 or VV10 exhibited a high transparency. This work provides a novel and effective strategy for designing high-performance PVC-based damping materials with an extended service temperature range and robust mechanical integrity. Download: Download high-res image (423KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jinpeng Zhao,Zi'ang Liu,Suo Fu,Fazheng Wei,Xiaowei Chen,Danqing Liu,Weicheng Huang,Shaoqin Liu
A Sm/Co dual-doping strategy is introduced to the A and B sites of BiFeO 3 (BFO) perovskite structure to boost the synergetic piezo-photocatalytic performance for organic pollutant degradation and hydrogen production. The optimized doping ratio enables it to achieve the best balance between carrier concentration and piezoelectric response while regulating the energy band. The dual-doped sample Bi 0.9 Sm 0.1 Fe 0.8 Co 0.2 O 3 (BS 0.1 FC 0.2 O) exhibits the best piezo-photocatalytic performance, achieving a 90% RhB degradation efficiency in 60 min and hydrogen production rate of 1525 μmol g −1 h −1 . The coupling of Sm and Co co-doping in BFO effectively enhances the light harvesting and the piezoelectric polarization performance, which facilitate the generation and separation of electrons and holes. This work provides a paradigm for designing efficient piezo-photocatalysts with tailored band structures through bimetal co-doping strategies and demonstrates great potential for applications in environmental remediation and hydrogen production.
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