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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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Huajing Zhang,Chao Xu,Xiangyu Sun,Bowen Xu,Zhirong Liao,Huawei Liu
Ca-based materials are considered to be promising energy storage materials for the 3rd generation concentrated solar power (CSP) plants due to their high energy storage density , high operating temperature , and low energy loss . However, the poor cyclic stability, low solar absorption capability, and slow reaction kinetics of conventional Ca-based materials seriously limit large-scale applications. Here, we successfully synthesized a Zr-Mn co-doped CaO-based composite, achieving good cyclic stability, enhanced solar absorption capability, and fast carbonation reaction kinetics simultaneously. The energy storage performance of 20Ca-0.5Zr-0.5Mn was evaluated at a high carbonation reaction temperature of 850 °C. Results showed that the performance decay of 20Ca-0.5Zr-0.5Mn was only 10.11 % over 30 cycles. By co-doping Zr and Mn elements, the carbonation reaction kinetics of CaO-based composites were promoted because of increased basicity and oxygen vacancies . Compared with pure CaO, the average solar absorptance of 20Ca-0.5Zr-0.5Mn was enhanced by about 376 %. Therefore, the proposed Zr-Mn co-doped CaO-based composite indicates the bright applied prospect in CSP plants for solar energy storage .
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Mengen Liu,Qianyi Tang,Baijun Liu,Mingyao Zhang
Herein, the impact modifier of poly(butyl acrylate) grafted poly(styrene-co-acrylonitrile) (PBA-g-SAN) with 60% rubber content was prepared by emulsion grafting polymerization and subsequently blended with styrene–acrylonitrile copolymer (SAN) resin to construct acrylate styrene acrylonitrile (ASA) resins. The effects of acrylonitrile content of PBA-g-SAN copolymer and PBA size on the ASA resins' mechanical properties were investigated. Experimental results revealed that ASA resin's highest impact strength reached 27.75 kJ/m 2 . The lap shear adhesion test suggested that the PBA-g-SAN copolymer with 21% AN content exhibited excellent interfacial adhesion with SAN resin. The PBA-g-SAN particles with 100 and 400 nm poly (butyl acrylate) as core rubbers demonstrated a synergistic toughening effect for SAN resin. The high blackness ASA resin with excellent impact resistance was obtained when the 100 nm and the 400 nm poly (butyl acrylate) particle mass ratio reached 8/2. Highlights The ASA resin with 27.75KJ/m 2 impact strength was prepared. The synergistic toughening mechanisms were investigated. The high blackness ASA resin was constructed.
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高影响因子
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 Macromolecular Science Part B-Physics
·
2020
·
IF 0.911
Ping Chen,Zhihua Zhou,Wenjuan Liu,Yanmin Zhao,Tianlong Huang,Xiaofei Li,Jianglong Duan,Jianjun Fang
The technique of thermally induced phase separation (TIPS) is favorable for the fabrication of a porous scaffold due to a number of advantages. In this work the poly(L-lactide-co-glycolide-co-ε-caprolactone) (PLLGC) terpolymer was synthesized by melt copolymerization and porous scaffolds thereof from its solution in 1,4-dioxane were fabricated by using the TIPS method. The effects of fabrication parameters, including polymer concentration and freezing temperature, on the morphology, pore size and mechanical properties were studied. The results showed that the average pore size of the PLLGC porous scaffold increased with a decrease in PLLGC concentration and the pore size resulting from freezing at 4 °C (about 20–100 μm) was significantly larger than for other samples (20–50 μm) frozen at lower temperatures. The porosity of the scaffolds decreased with increasing PLLGC concentration or decreasing freezing temperature. On the other hand, the compressive strength of the scaffolds increased with the increase of PLLGC concentration or the decrease of freezing temperature, as would be expected. The present results can be applied in design to control the processing parameters of TIPS for a scaffold with desired pore morphology.
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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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高影响因子
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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高影响因子
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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高影响因子
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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高影响因子
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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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Hongliang Fu,Wenyao Xue,Shaocong Zhan,Jing Zhao,Yue Lian,Zhifeng Wang,Yongfeng Hu,Huaihao Zhang
Metal active sites are anchored via the coordination effects between V/Co and terephthalic acid. • Co-doping constructs highly active Co-O-V catalytic sites, enhancing reaction activity. • PTA-derived oxygen-containing carbon layer mitigates metal site dissolution, improving stability. Developing highly active and stable catalysts for alkaline electrolytic water oxidation remains a challenge. Here, we prepared highly active, stable and conductive scale like microsheet Co-V 2 O 5 @C through Co-doping and coordination effect between terephthalic acid (PTA) and metal (V/Co). Specifically, Co-doping into V 2 O 5 lattice constructs highly active V-O-Co sites, thus reducing the adsorption energy of oxygen-containing intermediates. Meanwhile, the scale like microsheet Co-V 2 O 5 @C expose abundant active sites, enhancing oxygen evolution efficiency. The coordination effect between PTA and V/Co enables the in-situ formation of carbon layer on V 2 O 5 surface after carbonization, which effectively alleviates the dissolution of active sites and enhances stability. For conductive design, the Co introduction into V 2 O 5 can promote intrinsic conductivity. Moreover, under high-temperature carbonization, PTA evolves into oxygen-containing carbon layer, which boosts Co-V 2 O 5 @C overall conductivity and reaction kinetics. Based on above advantages, Co-V 2 O 5 @C displays good electrochemical performance in oxygen evolution reaction (OER) (low overpotential: 290 mV@10 mA cm −2 ; long stability: 50 h; small charge transfer resistance: 11.7 Ω). Download: Download high-res image (226KB) Download: Download full-size image
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高影响因子
GREEN CHEMISTRY
·
2026
·
IF 9.2
Ting Xiang,Njud S. Alharbi,Xijun Wang,Changlun Chen
The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) coupled with hydrogen evolution offers a sustainable approach for producing value-added chemicals and green hydrogen. Achieving both high current densities and long-term operational stability remains a significant challenge. A metal–organic framework (MOF)-structured Co–Ni(TCNQ)2·2H2O nanorod-array catalyst demonstrates exceptional activity and durability for HMF electrooxidation. This bimetallic framework achieves high current density up to 1000 mA cm−2, requiring only 1.72 V in 1.0 M KOH with 200 mM HMF, which significantly outperforms Ni(TCNQ)2·2H2O and highlights the strong promoting effect of cobalt incorporation. Nearly complete HMF conversion and high selectivity for 2,5-furandicarboxylic acid (FDCA) are observed, along with excellent recyclability under concentrated substrate conditions. Operando and ex situ analyses indicate that cobalt doping mitigates over-oxidation and the associated irreversible structural transformation of the nickel sites stabilizes a dynamic Ni2+/Ni3+ redox cycle, and enhances charge delocalization through the TCNQ ligand. These effects collectively prevent over-oxidation and ensure sustained catalytic turnover. Density functional theory calculations confirm that cobalt strengthens HMF adsorption and facilitates FDCA desorption, thereby coupling efficient substrate activation with effective product release. This dual thermodynamic modulation explains the reduced onset potential and increased current density. Thus, Co–Ni(TCNQ)2·2H2O serves as a robust, selective, and scalable electrocatalyst, linking mechanistic understanding to industrial-scale biomass upgrading and simultaneous hydrogen generation.
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高影响因子
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