ACS Applied Energy Materials
·
2023
·
IF 6.4
Jiaqi Xu,Zhoulin Ye,Zongcai Deng,Dongchu Chen,Qilang Lin,Dongyang Chen
Polymer batteries have attracted increasing attention because of their advantages of good flexibility, high compatibility with organic electrolytes, and high environmental friendliness. However, the low utilization rate of the redox-active units buried in polymeric network and the slow kinetics of the electrochemical reactions hinder their development. Herein, mono- and diviologen functionalities are attached to a tetramethylbiphenol-derived poly(arylene ether ketone) (TPAEK) by postmodification to yield two redox-active polymers MV-TPAEK and 2MV-TPAEK, respectively, and polymer electrodes are prepared by mixing them with N-doped carbon nanotubes without binders. When paired with the Li counter electrode, the MV-TPAEK and 2MV-TPAEK electrodes deliver specific discharge capacities of 93.3 and 95.4 mA h g–1, respectively, at a current rate of 0.1 C and maintain 36.1 and 42.3 mA h g–1, respectively, after 100 galvanostatic cycles. When the current rate is increased to 10 C, the specific discharge capacities are lowered to 13.9 and 25.8 mA h g–1, respectively, for the MV-TPAEK and 2MV-TPAEK electrodes due to the increased electrochemical polarizations. All of these results prove that the 2MV-TPAEK electrode is better than the MV-TPAEK electrode. When the counter electrode is changed to Na, the trend remains the same. Given the fact that the two polymers have an identical backbone, the improved electrochemical performance of 2MV-TPAEK may be ascribed to the larger mobility of the extended 2MV pendant, which is beneficial for the formation of more molecular voids and stacked intermediate structures for better charge transfer. This study paves the way for the molecular design of redox-active polymers for high-performance polymer batteries.
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高影响因子
DESALINATION
·
2025
·
IF 9.8
Xiaoying Lin,Bingqing Huang,Yifan Liu,Yuancai Lv,Chunxiang Lin,Jianhui Huang,Minghua Liu,Xiaoxia Ye,Jie Chen
The development of adsorbents capable of simultaneously achieving high uranium(VI) adsorption capacity, rapid kinetics, and exceptional selectivity remains a critical challenge for sustainable uranium(VI) extraction from seawater, essential for nuclear energy sustainability. Herein, we report the synthesis of a novel ellagic acid immobilized conjugated micro-mesoporous poly(aniline)s (CMP-E) via a Buchwald-Hartwig coupling strategy incorporating ellagic acid prefunctionalization. This synergistic combination of molecular confinement and pore engineering maximizes the density of accessible adsorption sites, overcoming the long-standing trade-off between adsorption site uniformity and surface coverage in conventional adsorbents. The resulting CMP-E showed exceptional uranium(VI) extraction performance, achieving a record adsorption capacity of 515 ± 14 mg g −1 , and the initial adsorption kinetics ( h ) reached 6.5 ± 0.3 mg g −1 min −1 , both exceeding pristine CMP by over 1.5 times. Notably, CMP-E demonstrated outstanding selectivity for uranium(VI), with a selectivity coefficient over 6.8 for uranium(VI)/other ions in the presence of various co-existing ions. This enhanced performance was attributed to the stable negative surface charge of CMP-E across a wide pH range, which promoted efficient electrostatic enrichment of uranium(VI) species. The subsequent coordination of uranium(VI) with lone pair electrons from nitrogen atoms (-NH- and = N-) in the poly(aniline) skeleton and oxygen atoms (-OH and C O) in the ellagic acid moiety further enhanced the uranium(VI) capture. Dynamic adsorption tests in real seawater demonstrated promising performance, achieving >86.3 ± 0.9 % uranium(VI) recovery with negligible capacity loss. Furthermore, a 7-day marine field test conducted in Pingtan revealed an adsorption capacity of 2.32 ± 0.02 mg g −1 under real marine conditions. These results suggested that CMP-E held significant potential as a material for the efficient extraction and recovery of uranium(VI) from seawater.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120398
·
IF 7.2
Rui Li,Yangyang Lei,Meilin Yin,Lipeng Wang,Shaokun Tang
Combining ionic liquids (ILs) with metal–organic frameworks (MOFs) functionalizes the MOF pores and provides numerous active sites including Lewis acidic sites and hydrogen bond donors in the resulting heterogeneous composites, making them promising materials for CO 2 capture and conversion. Despite this potential, the prevalent microporosity in most MOFs severely restricts mass transfer. To address this limitation, it is essential to introduce hierarchical porosity into MOFs since it can enhance CO 2 capture and conversion by facilitating mass transfer and molecular diffusion. In this work, a hierarchical porous gel of UiO-66-NH 2 (denoted as HP-UiO-66-NH 2 ) was prepared through a simple sol-gel process, exhibiting micropores within the particles, mesopores between the particles, as well as multiple catalytic sites. Subsequently, poly(ionic liquid)s (PILs) were introduced into the porous framework to successfully construct PILs-MOFs gel materials (HP-MOF@PILs). A comprehensive evaluation was conducted on the synthesized materials regarding their ability to adsorb CO 2 , their catalytic performance in CO 2 cycloaddition with epichlorohydrin, and their recyclability. Benefiting from the synergistic advantages of its hierarchically porous structure and the strong CO 2 and epoxide activation ability of nucleophilic Br ions in PILs, HP-MOF@PIL-2 demonstrated exceptional catalytic performance and achieved high efficiency for the cycloaddition of CO 2 with epichlorohydrin under mild conditions (80 °C, 0.1 MPa, 24 h) without requiring co-catalysts or solvents, showcasing its role as a potential and eco-friendly catalyst in CO 2 conversion processes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Fanshuai Gao,Lijia Liu,Huayu Liu,Yudan Wang,Yawen Liu
In aquatic environments, CH 3 Hg + represents a persistent neurotoxin that proves challenging to eliminate. Despite the extensive efforts made by countries in mercury pollution control, it still poses a significant threat to ecological health in some underdeveloped countries and regions. This study introduces a novel amorphous coordination polymer (BD-ACP-A), synthesized through a coordination reaction involving bis(4-hydroxyphenyl) disulfide, adenine, and Cr(NO 3 ) 3 ·9H 2 O. The resulting material exhibited exceptional adsorption performance for CH 3 Hg + across a wide pH range of 2 to 11. At an initial concentration of 300 ppb, adsorption equilibrium was reached within 30 min, with an adsorption capacity exceeding 1460 μg·g −1 and a removal rate surpassing 98.0 %. BD-ACP-A also demonstrated remarkable anti-interference capabilities, maintaining high adsorption efficiency in the presence of elevated concentrations of humic acid or NaCl, as well as in various real water samples. Furthermore, it exhibited excellent reusability; at an initial concentration of 160 ppb, it retained an adsorption capacity of 718 μg·g −1 and a removal rate exceeding 89.8 % after 10 adsorption-desorption cycles. The adsorption process was well described by the Langmuir isotherm and pseudo-second-order kinetic models, yielding a maximum adsorption capacity of 138 mg·g −1 . Mechanistic investigations utilizing FT-IR, XPS analysis and DFT calculations revealed that the adsorption is primarily driven by the synergistic chelation of sulfur atoms and covalent interactions with nitrogen atoms. This work not only provides a highly efficient adsorbent for CH 3 Hg + pollution control but also presents a novel strategy for designing amorphous polymers with broad pH adaptability and rapid adsorption kinetics.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Yusong Zhang,Wei Shi,Huanlin Li,Lei Yang,Lei Hou,Cheng Ma
Enantiomers often exhibit significant differences or even diametrically opposed effects in pharmacological activity, toxicological properties, and metabolic behavior. Single-enantiomer drugs frequently demonstrate distinct advantages over the racemate. Therefore, accurately distinguishing between enantiomers and racemate is particularly crucial in the fields of chemistry and biomedicine. Racemates, as mixtures of equal amounts of the enantiomers (levorotating and dextrorotating), exist in two forms: racemic mixtures and racemic compounds. Racemic compounds exhibit differences from their enantiomers in absorption spectra, whereas racemic mixtures do not. This study investigates the absorption spectra of ( S )-(+)-2-phenylpropionic acid, ( R )-(-)-2-phenylpropionic acid, and their racemates using terahertz time-domain spectroscopy technology. Experimental results indicate that the enantiomer exhibits absorption peaks similar to those of the racemic mixture, but with a significant difference in absorption intensity. Further combined with density functional theory (DFT), theoretical spectral calculations were performed on the solid state and solution enantiomers based on single molecule and unit cell models respectively. It was found that the enantiomeric simulation spectra were highly consistent. After the sample transitioned from solid to solution state, changes in hydrogen bonds would change its molecular vibration characteristics and intermolecular interaction patterns.
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Ya Zeng,Lingfeng Qin,Sijie Tian,Caicheng Long,Taiping Qing,Peng Zhang,Bo Feng
Cobalt-based multiphase catalysts can effectively activate peroxymonosulfate (PMS) and degrade organic pollutants. However, their practical application faces critical challenges, including insufficient exposure of active sites, slow reaction kinetics, and cobalt ion leaching, which collectively reduce catalytic efficiency and sustainability. Although there have been attempts to improve the catalytic efficiency through structural modifications such as core-shell structure or porous design, these strategies are still difficult to optimize the active site exposure and cobalt ion stability simultaneously. To overcome these limitations, here we propose a novel triple-shell yolk@shell architecture (3YS-Co@NC) constructed via a stepwise strategy involving crystal extension growth, selective etching, and calcination. The optimized nanoreactor degraded 100 % of bisphenol S (BPS) within 12 min with a rate constant (0.342 min −1 ) 9.5-, 2.34-, and 1.49-fold higher than solid nanoparticles (Co@NC), single-shell (1YS-Co@NC), and double-shell (2YS-Co@NC) counterparts, respectively. Notably, the TOC removal rate of 3YS-Co@NC reached 71 %, surpassing those of 1YS-Co@NC (53 %), 2YS-Co@NC (65 %), and Co@NC (21 %). The enhanced performance results from (i) the yolk@shell structure providing nanoreaction cavities and abundant active sites, and (ii) the robust Co 0 /Co 2+ /Co 3+ redox cycling. Quenching experiments and EPR analysis revealed that SO 4 •- and •OH dominated PMS activation, while O 2 •- played an auxiliary role. In contrast, 1 O 2 exhibited negligible contribution. LC/MS analysis identified key degradation intermediates, and the ECOSAR model predicted reduced biotoxicity of these products. This study not only promotes the development of advanced oxidation processes, but also provides a new insight into the design of cobalt-based catalysts.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhenyuan Ji,Guanxiang Tang,Jingchuang Zhang,Xinghang Chuan,Jiali Zhong,Zixin Lin,Peng Song,Keqiang Xu,Xiaoping Shen
Exploiting advanced anode and cathode materials with distinctive architectures and multi-component participation is of great significance to boosting the energy density of asymmetric supercapacitors. Herein, ultra-fine FeOOH nanoparticles are in situ grown on the hollow N, S co-doped carbon (HNSC) spheres using a facile solvothermal strategy and subsequent calcination process. Benefiting from the attractive hollow architecture and the synergistic effect between FeOOH and HNSC, the FeOOH/HNSC composite as anode for supercapacitors delivers an optimal capacity of 588.2 C g −1 (1 A g −1 ) and remains 88.3 % of its initial value after 10,000 cycles at 15 A g −1 in 6 M KOH. Furthermore, the HNSC-supported Co 3 S 4 nanoparticles are also prepared through a one-step solvothermal strategy. The obtained Co 3 S 4 /HNSC composite as cathode achieves a capacity of 420 C g −1 (1 A g −1 ) and maintains a high retention of 95.3 % after 10,000 cycles at 15 A g −1 . The constructed asymmetric supercapacitor using FeOOH/HNSC and Co 3 S 4 /HNSC as anode and cathode appears to possess a superior energy density of 82.3 Wh kg −1 at 821.6 W kg −1 with retention of 84.9 % after 10,000 cycles at 10 A g −1 . These attainments demonstrate that constructing multi-component electrode materials with unique structures is an effective method to optimize the electrochemical characteristics of asymmetric supercapacitors.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 8
·1804
·
IF 4.6
Wentao Xiang,Zhenzhen Yu,Renwu Gao,Zhichao Yi,Kun Gong,Kangqiang Lu,Weiya Huang,Changlin Yu,Zeshu Zhang,Man Zhou,Kai Yang
Rapid charge separation and transfer is the key scientific problem in photocatalysis. The construction of S-scheme heterojunction is one of the effective strategies to promote charge separation and maintain the strong redox properties. Herein, the NiO, K0.2WO3, and NiWO4ternary double S-scheme K0.2WO3/NiO/NiWO4heterojunction (W/NiO) was created by a one-step molten salt method. Ultraviolet-visible (UV-Vis) diffuse reflectance spectra, photoluminescence (PL) spectra, photoelectrochemistry tests, and other analyses revealed that the double S-scheme heterostructure broadened the spectral response range of NiO and promoted its separation of photocarriers. Compared with pristine NiO, the modified double S-scheme heterojunction enhanced the surface adsorption of water molecules and the accumulation of intermediate product of HCOO−, and optimized the CO2reduction system, realizing the improved CO yield of 373 μmol·g−1·h−1in Ru(byp)32+/ethanolamine of CO2reduction system. This study indicates that double S-scheme heterojunction could facilitate efficient photogenerated charge transfer and separation, thereby achieving high activity and selectivity for CO2photoreduction. Our work provides a reference for the one-step construction of double S-scheme heterojunction.
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PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 27
·275404
·
IF 3.551
Xinzhe Yang,Xiaofei Liu,Tingting Qin,Xiaoyu Zhang,Wei Zhang,Weitao Zheng
Although there are numerous virtues for lithium sulfur batteries, the notorious shuttle effect and insulated nature are impeding their practical application. To address these issues, here we report the design and synthesis of polypyrrole coated sulfur and cobalt co-doped carbon nanocages (PSCC). It demonstrates that both the performance and stability of the PSCC assisted Li-S batteries are improved. The hollow structure of PSCC bypassed the structural collapse effectively caused by volume expansion of sulfur during the reaction and physically suppressed shuttle effect of the intermediate product polysulfide lithium (LiPSs). Also, LiPSs was also trapped to inhibit the shuttle effect due to the strong adsorption of LiPSs via PSCC. In addition, PSCC can also provide an outstanding electronic conductivity, which will facilitate the next-step reaction of the absorbed LiPSs and enhance electrochemical reaction kinetics. Thus, the excellent rate performance was obtained with high specific discharge capacities of 1300 mAh g−1 at 0.1 C and 1000 mAh g−1 at 0.5 C. Such packaged high-performance positions our design for the ideal electrochemical energy storage devices.
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高影响因子
TEXTILE RESEARCH JOURNAL
·
2017
·
IF 1.443
Lili Wang,Xiancheng Wang,Yifeng Shen,Jianzhong Shao,Fuyu Pei
S-triazine di-sulfanilic guar gum (TSG) was successfully prepared by monochlorotriazine di-sulfanilic (TS) and guar gum (GG) in order to improve the printing properties in reactive printing. The results showed that the optimized synthesis condition of TSG was at sodium carbonate solution 1.2 g/L at 90℃ for 75 min through the single-factor experiment. Compared to GG, TSG had better flowability, mainly viscous effects and higher viscosity recoverability, which was more appropriate as a thickener in reactive printing. In the cotton printing experiment, TSG had higher paste add-on, color yield, penetration and levelness than GG. Furthermore, the printing effects of TSG on cotton drew near to those of sodium alginate, which could obtain evenly colored large patterns and excellent outline sharpness.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Li He,Di Yang,Hainan Zhao,Luyao Wei,Dashuai Wang,Yizhan Wang,Gang Chen,Yingjin Wei
The confinement and catalysis properties of orthorhombic CoSe 2 as a host material for Li-S battery are studied by theoretical and experimental methods. First-principles calculations show that the (111) surface of CoSe 2 possesses adjacent nucleophilic and electrophilic centers. This bi-polar surface can easily bond the polysulfide molecules and catalyze their conversion reactions. As a result, the decomposition energy barriers of polysulfides are greatly decreased from ∼3.0 eV to 0.2–0.4 eV. Following theoretical prediction, CoSe 2 nanocrystals with specific (111) surface are prepared and embedded in porous carbon nanocages using ZIF-67 metal organic framework as a template. Benefited from the advantages of porous C and CoSe 2 (111) surface, the shuttling of polysulfides is suppressed and their conversion kinetics is facilitated. The Li-S cell using this host material exhibits high capacity and remarkable cycle stability, showing a discharge capacity of 1199 mA·h·g −1 at 0.2C and 400 stable cycles at 1.0C.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·
IF 1.289
Pei Chen,Xinbing Chen,Zhongwei An
Crosslinkable sulfonated poly(arylene ether sulfone)s (SPAESs) were synthesized by copolymerization of 4,4′-biphenol with 2,6-difluorobenzil, 4,4′-difluorodiphenyl sulfone, and 3,3′-disulfonated-4,4′-difluorodiphenyl sulfone disodium salt. The corresponding covalent-ionically crosslinked SPAESs were prepared via the cyclocondensation reaction of benzil moieties in polymer chain with 3,3′-diaminobenzidine. The crosslinking significantly improved the membrane performance, that is, the crosslinked membranes had the lower membrane dimensional swelling, lower methanol permeability, and higher oxidative stability than the corresponding precursor membranes, with keeping the reasonably high proton conductivity. The crosslinked membrane ( CS5 ) with measured ion exchange capacity of 1.47 meq g −1 showed a reasonably high proton conductivity of 112 mS cm −1 with water uptake of 42 wt % at 80°C, and exhibited a low methanol permeability of 2.1 × 10 −7 cm 2 s −1 for 32 wt % methanol solution at 25°C. The crosslinked SPAES membranes have potential for PEFC and DMFCs. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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