JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2017
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IF 3.012
Y.X. Wei,Y.B. Ma,M. Chen,W.M. Liu,L. Li,Y. Yan
Electrochromic devices (ECDs) based on WO 3 and Ti doped V 2 O 5 films are fabricated by using lithium (LiClO 4 ) liquid electrolyte containing ferrocene redox couple . The addition of ferrocene in electrolyte enhances electrochromic properties of device. The device based on LiClO 4 -Ferrocene electrolyte has larger charge density than that based on LiClO 4 electrolyte. In the 600–1500 nm wavelength range, the transmittance of colored device is under 2% and it has faster coloring response. At 680 nm wavelength, it shows larger changes in transmittance from 68% to 1.8% while device based on LiClO 4 electrolyte changes transmittance from 68.3% to 11.5%. The cycling data reveal that device based on LiClO 4 -Ferrocene electrolyte can yield more stable electrochromic properties at 65 °C than room temperature. In order to deeper understand the effect of electrolyte on films and devices, electrochemical impedance spectroscopy (EIS) and the voltage distribution of films based on an analog cell are separately measured and analyzed in LiClO 4 and LiClO 4 -Ferrocene electrolytes. Results indicate that compared with LiClO 4 electrolyte, films have lower charge-transfer resistance and the distributed voltage on Ti doped V 2 O 5 film is larger in LiClO 4 -Ferrocene electrolyte, which can enhance optical properties of ECD by improving charge density of Ti doped V 2 O 5 film.
研究领域:
材料科学
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电化学
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功能材料
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纳米科技
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能源技术
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ADVANCED COMPOSITE MATERIALS
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2025
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IF 2.3
Wenbin Huang,Mengqi Duan,Yongjie Yan,Qingqing Ni,Xiaoming Qi,Lu Xu
Carbon nanotube fibers (CNTF) have great application potential in flexible electronics, smart wearables, bioelectrodes due to their excellent mechanical/electrical properties. However, CNTF is assembled by a large number of CNT monomers, and loose combination of these monomers usually weakens its mechanical/electrical properties. In this study, referring to the principle of carbon fiber precursor carbonization, the carbonization of PAN (polyacrylonitrile) was used to encapsulate and fix the CNTF precursor prepared by floating catalytic chemical vapor deposition to enhance CNTF mechanical performance. Firstly, PAN with different mass fraction was selected as sizing agent to treat the twisted fiber(CPAN@CNTF), then carbonized heat treatment was carried out at different temperatures. Through analyzing the enhancement effect of the structural changes of PAN on the mechanical/electrical properties of CNTF under different conditions, then, the mechanical properties of CNTF reached the best when the PAN sizing amount was 10 wt.% and the heat treatment temperature was 320ºC, and the breaking strength of CNTF was increased to 480 MPa, which was 44% higher than that of untreated CNTF group. It is found that the elastic recovery degree of slurry CPAN@CNTF is excellent through thermomechanical stretching, indicating that PAN after pre-oxidation and low temperature carbonization has a stable effect on the structure of CNTF.
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Science Advances
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2025
·Vol. 11
·期 40
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IF 12.5
Zhiqiang Yao,Yutong Tang,Xiaochang Zou,Guojian Yang,Yu-Mo Zhang,Sean Xiao-An Zhang
As an eye-friendly display technology, electrochromic displays still face challenges in playing videos due to their slow response speed. Here, we designed and developed pseudo-rhodamine electrochromic molecules through a “tandem all-in-one” synthetic strategy that covalently integrates three distinct functional units within a single molecule. This molecular architecture simultaneously achieves exceptionally high heterogeneous electron transfer rate constant and ultrahigh molar absorption coefficient. We verified the underlying electrochromic mechanism involving a two-electron redox process of pyridinecarboxylic acid derivative units coupled with reversible pseudo-rhodamine spirocyclization. By implementing this tandem all-in-one molecular engineering strategy, different functional subunits within the electrochromic molecule are mutually bonded to interact through alternating reaction sequences, enabling near-synchronous operation of individual units. The resulting electrochromic display demonstrates ultrafast response speeds (35 milliseconds for bleaching and 65 milliseconds for coloration), capable of smooth video playback and rapid switching between digital states. The design principle showcases a prospective design pathway for the development of ultrafast electrochromic video displays.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
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IF 7.9
Dongsheng Zhang,Rui Yang,Ting Wu,Wangbo Wang,Yizhou Feng,Weihuang Zhu
Single-atom catalysts (SACs) have attracted considerable interest in heterogeneous Fenton-like reactions (HTFR). However, their efficiency and practical applicability require further improvement. To address this, an S-doping strategy was employed, using zeolitic imidazolate framework-8 (ZIF-8) as a precursor to fabricate Fe-based SACs (Fe-SNC) for peroxymonosulfate (PMS) activation. X-ray absorption fine structure (XAFS) analysis confirmed the coordination of atomically dispersed Fe to N and S atoms, forming a Fe–N 2 S 2 configuration. In a separate adsorption test, Fe-SNC achieved 93.1% removal of tetracycline (TC). Furthermore, TC could be removed within 40 min during PMS-based HTFR catalyzed by Fe-SNC, exhibiting significantly high performance compared to the pristine Fe-NC catalyst. Additionally, the activation energy for PMS activation was decreased to 2.87 kJ/mol with Fe-SNC, which is only 26.16% of that required for Fe-NC (10.97 kJ/mol). The superior performance of Fe-SNC is attributed to its enhanced adsorption capacity and high PMS activation ability. Density functional theory (DFT) calculations further revealed that S-doping significantly enhanced the adsorption energy between catalyst and PMS to -2.95 eV. It also promoted the elongation of O–O (1.477 Å) and S–O (1.873 Å) bonds, while facilitating charge transfer of 0.79 e. The galvanic oxidation process (GOP) also demonstrated that the electron transfer process played a key role during the PMS-based HTFR catalyzed by Fe-SNC. The quenching experiments and EPR tests further confirmed that the 1 O 2 and Fe(IV)=O were the primary reactive species. This work provides insightful perspectives for the rational design of highly efficient SACs for HTFR.
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JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Jiahe Liu,Huan Zhang,Jiahao Fan,Shuqi Ren,Ruili Liang,Li Song,Yachao Jin,Mingdao Zhang
Graphite, as a non-renewable key anode material in lithium-ion batteries, requires efficient and green regeneration to ensure the sustainable development of the battery industry. Conventional recycling methods are hindered by the reliance on highly corrosive reagents or ultra-high temperatures, leading to significant environmental impacts. This study proposes a low-temperature graphitization repair strategy based on ferrocene catalysis. Through iron-based catalyst-promoted carbon layer ordering under mild conditions at 700 °C, the graphitization degree and interlayer structural integrity of the material are significantly enhanced. The regenerated graphite (R-Gra) exhibits excellent electrochemical performance, delivering an initial charge capacity of 359.8 mAh g −1 at 0.05C, comparable to commercial materials, and retaining 222.7 mAh g −1 at a high rate of 3C, with improved cycling stability. Systematic structural characterization and kinetic analysis reveal the intrinsic relationship between the catalytic graphitization process and the restoration of electrochemical properties. Furthermore, tracking the migration behavior of Fe species during long-term cycling confirms that Fe/Fe 3 C nanoparticles remain stably encapsulated within the graphite interlayers, without significant dissolution or migration, effectively avoiding side reactions and electrode interface contamination. This work provides an effective low-temperature and green regeneration route for spent graphite anodes, demonstrating both environmental and practical feasibility.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Chong Xu,Junjie Fu,Ye Wang,Dongming Jiang,Changwei Cao,Miao Gao,Yun Fu,Guang Ma,Shuang Liu,Gong Cheng,Dongyuan Zhang,Yan Jia,Yongfeng Li
Silicon nanoparticles (Si NPs) are regarded as one of the most promising anode materials for lithium-ion batteries (LIBs) owing to their exceptionally high theoretical capacity. Nevertheless, their practical application is severely restricted by intrinsically low electrical conductivity and pronounced volume expansion during lithiation and delithiation. Here, we report the construction of a homogeneous Fe/C composite coating on silicon particles via a facile surface deposition approach, enabling the simultaneous modulation of both bulk-phase structural stability and the chemical composition of the solid electrolyte interphase (SEI). Structural characterization reveals that the continuous carbon layer functions as a highly conductive network, establishing efficient electron transport pathways, while also acting as a physical confinement barrier that suppresses detrimental electrode-electrolyte interfacial reactions. Concurrently, uniformly dispersed Fe nanoclusters catalytically regulate SEI formation kinetics, inducing the preferential decomposition of LiPF 6 to generate a compact, inorganic-rich interfacial layer. This tailored SEI enhances lithium-ion conductivity while preserving its electronic insulation, thus achieving concurrent optimization of ionic and electronic transport properties. When paired with a LiNi 0.8 Mn 0.1 Co 0.1 O 2 cathode in a full-cell configuration, the Fe/C-Si anode delivers a discharge capacity of 152.67 mAh g −1 with 86.34% capacity retention after 200 cycles. This Fe/C composite coating strategy provides a robust and effective route for stabilizing both the bulk structure and the interfacial chemistry of high-strain anode materials, offering new insights into the design of next-generation high-performance LIBs.
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Materials Today Physics
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2026
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IF 9.3
Kexun Li,Fangyu Shi,Yanxia Wu,Min Zhao,Ying Liu
Modulating the electromagnetic properties of Ti 3 C 2 T x MXene to produce an ideal multifunctional and efficient microwave absorbent is a challenging research hotspot. Although the atomic layer deposited transition magnetic metal nanostructures are a feasible strategy, the effects of the components and microstructure of the introduced magnetic nanostructure on the electromagnetic wave absorption performances of the MXene are still far from clear. Here, the Fe element has been selected as the modifier, and a heterostructure Fe/Ti 3 C 2 T x MXene hybrid is constructed by the atomic layer deposition of Fe nanoparticles on the Ti 3 C 2 T x nanosheets. The influences of the deposition cycles on the chemical composition, microstructure, electromagnetic response characteristics, and microwave absorption properties are investigated. The results show that the decoration of Fe nanoparticles enables a tunable electromagnetic performance. The Fe/Ti 3 C 2 T x MXene hybrid achieves an optimal attenuation with the minimum reflection loss of -82.94 dB at a small thickness of 1.16 mm, corresponding with an effective absorption bandwidth of 3.76 GHz. The strong microwave absorption is attributed to the dielectric-magnetic synergy in the MXene and Fe nanoparticles, which provides excellent impedance matching, interfacial and dipolar polarization loss, and magnetic resonance loss. Specifically, the hybrid endows a low Fe content of 2.66 wt%. This is important for the design of a lightweight absorber with high attenuation efficiency.
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Journal of Materials Chemistry A
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2026
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IF 9.5
Bing Liu,Haoming Zhong,Hina Gul,Hao Peng,Xiaolei Guo,Yu-Long Xie,Minhua Ai,Xiangwen Zhang,Ji-Jun Zou,Lun Pan
Biomass electrooxidation for coupled hydrogen production offers a promising route to overcome the sluggish kinetics and high energy cost of conventional water electrolysis. The electrocatalytic oxidation of L-ascorbic acid (AA) to high-value dehydroascorbic acid (DHA) is particularly attractive but requires efficient catalysts to facilitate the challenging two-step dehydrogenation process. Here, we report a FeRu-NC catalyst with excellent L-ascorbic acid oxidation reaction (AAOR) catalytic activity and selectivity. The FeRu-NC catalyst achieves a significantly lower overpotential of 10 mV at 10 mA•cm⁻² and delivers a high current density of 200 mA•cm⁻² at only 0.68 V vs. RHE, while maintaining stable operation for over 80 h. DHA is produced with high yield (~95%), selectivity (~97%), and Faradaic efficiency (~95%). XPS, XAFS studies and in-situ IR spectroscopy reveal that the introduction of trace Ru modulates the electronic structure of Fe single-atom sites, enhancing the adsorption of key intermediates and promoting the second dehydrogenation step, presenting a highperformance AAOR activity and high selectivity for DHA.
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ADVANCED MATERIALS
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2026
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IF 26.8
Xuecheng He,Wei Huang,Wensheng Lin,Binbin Cui,Xinyu Tian,Jing Bai,Dingyao Liu,Ivo Pang,Hao Huang,Shixian Lin,Jixiang Zhu,Jinqiang Wang,Shiming Zhang
Effective blood glucose management is an increasing demand worldwide. Traditional solutions separate glucose detection and insulin delivery, which is less efficient compared to emerging closed-loop wearable systems controlled by continuous glucose monitors (CGMs). However, CGM-controlled systems raise new safety risks, as false CGMs readings can cause insulin overdose, which results in hypoglycemia and fatal consequences. This work proposes a concept of a dual closed-loop insulin delivery system (DuoLoop) to mitigate the risk issue of CGM-controlled systems. The first closed-loop is automated insulin delivery controlled by CGM. The second closed-loop is the controlled release of glucose-responsive insulin (GRI), whose release rate depends on actual glucose levels. A customized algorithm is trained and embedded into the wearable CGMs for edge computing. The DuoLoop system shows improved safety in preliminary in vivo test (longer normoglycemia durations, 98.82% vs 92.10%), encouraging its deployment toward precision diabetes care.
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Journal of Environmental Sciences
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2026
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IF 6.3
Lihui Zhao,Can Jin,He Liu,Zhaozhe Yang,Yupeng Liu
Bisphenol A (BPA), a widespread endocrine-disrupting compound, necessitates efficient activation of peroxymonosulfate (PMS) for its degradation. Conventional carbon-based catalysts frequently exhibit limited efficiency, poor stability, and potential environmental risks. Bamboo-derived porous carbon material (BCM) and bamboo-derived porous carbon material loaded with Fe (BCM-Fe) serve as effective catalysts for activating PMS to degrade BPA. The BCM/PMS system achieved a BPA removal efficiency of 94.44 % within 150 minutes, while the BCM-Fe/PMS system attained 97.8 %. Quenching experiments and electron paramagnetic resonance (EPR) analysis identified non-radical singlet oxygen (¹O₂) as the dominant reactive species. Density functional theory (DFT) calculations demonstrated that atomically dispersed Fe species on BCM-Fe significantly enhanced PMS adsorption energy and activation kinetics compared to BCM. Both catalysts exhibited excellent reusability, confirming their potential as practical and sustainable catalysts. This study provides fundamental insights for designing efficient, environmentally benign carbon-based catalysts for advanced oxidation processes.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zhangwu Chen,Chengbiao Zhu,Le Wang,Chengfeng Li,Yubo Ge,Shuo Lei,Jianhua Zhou,Zhenwei Wei,Xinming Huo
A portable three-electrode spray sheet EC-MS system for in-situ reaction monitoring • Decouples spray high voltage from precise electrochemical control via floating ground • Seamlessly couples with HRMS to resolve complex electrochemical reaction networks • Integration with miniMS enables operando monitoring of synthesis in fume hoods • Offers guidance for the complex multi-parameter optimization of green EC engineering Electrochemistry (EC) is a core technology for elucidating charge transfer mechanisms and enabling catalytic innovation and material synthesis. However, characterizing reaction intermediates during EC process remains challenging owing to their high diversity, short lifetimes, and low concentrations. Recently, mass spectrometry (MS) has become a key tool for such studies due to its precise qualitative and quantitative capabilities. Although various in-situ MS techniques based on electrospray ionization (ESI) have been developed to detect short-lived intermediates, existing in-situ EC-MS devices are usually hindered by the voltage incompatibility between EC control and ESI high voltage, along with complex designs and cumbersome operations. Herein, we developed a portable EC-MS system featuring a three-electrode spray sheet. This sheet is fabricated by screen-printing electrodes onto a polyethylene terephthalate substrate with a sharp 90° tip, which is hydrophilically modified with 0.01% gelatin to function as both an electrochemical reactor and a spray emitter. Driven by a homemade floating-potential controller, the system enables precise three-electrode electrochemical control and direct ionization monitoring of intermediates. Characterization via scanning electron microscopy and dopamine experiments confirmed its stability and precise controllability, while DMA oxidation tests demonstrated its capability for analysis of microsecond level intermediates. The modular design allowed coupling with a high-resolution mass spectrometer to elucidate the oxidation pathway of sulfadiazine, clarifying the relevant metabolic pathways. Furthermore, integration with a miniature mass spectrometer enabled rapid on-site monitoring of sulfadiazine-catechol synthesis in a fume hood, demonstrating its convenience and scalability. This work provides a rapid and precise tool for monitoring liquid-phase electrochemical reactions. Download: Download high-res image (146KB) Download: Download full-size image
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AICHE JOURNAL
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2026
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IF 4.4
Yue Zhao,Shan Ni,Wang Yao,Yafeng Liu,Wenjie Wang,Huizhou Liu,Liangrong Yang
The development of uranium separation materials is essential to ensure a stable uranium supply for energy and to mitigate environmental risks. We report a two-dimensional ferrocene-vanadyl phosphate composite (fc-VOP) with expanded interlayer spacing (9.8 Å) and adsorption–reduction coupling function, made by solvent-assisted intercalation. This enables efficient uranium capture via optimized interlayer structure and interfacial properties. Interlayer expansion facilitates uranyl ion transport, accelerating adsorption kinetics, while the coupling function elevates interfacial concentration gradients to enhance ion binding, boosting capacity. The fc-VOP shows a theoretical adsorption capacity of 1968.60 mg/g (pH = 4, pure nitrate solution) with equilibrium in 30 min. It also performs well in spiked matrices, achieving 336.4 mg/g in leachate and 248.2 mg/g in seawater. This work provides a viable route to improve 2D phosphate materials for uranyl adsorption and offers mechanistic insights into designing adsorption–reduction coupling materials.
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