ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Weimin Kang,Nanping Deng,Xiaomin Ma,Jingge Ju,Lei Li,Xiaohong Liu,Bowen Cheng
In this study, the F-doped poly-m-phenyleneisophthalamide (PMIA) solution was synthesized by low temperature polymerization method and spun to be three-dimensional nanofibrous membranes by electrospinning. The Energy Dispersive X-Ray Spectroscopy and Fourier Transform Infrared Spectroscopy investigations verified that F was successfully doped in PMIA membrane. The X-ray diffraction patterns showed the crystallinity degree of PMIA membrane decreased with the addition of F. The morphology, pore size and aperture distribution tests manifested that the average diameter of F-PMIA fibers became finer and their distribution was more uniform than these of PMIA fibers. The electrolyte uptake, preserving liquid electrolyte, thermal stability and shrinkage resistance of the F-dopoed membrane were also significantly enhanced than that of pure PMIA membrane. The F-PMIA membrane could be acted as matrix to prepare gel polymer electrolyte. Finally, the F-doped PMIA membrane was used in the assembled coin cells to test the properties including the electronic conductivity , battery interfacial characteristics, electrochemical stability windows and cycle performances of battery. The lower electronic conductivity and interfacial resistance , higher electrochemical stability window (5.7 V) of F-doped PMIA membranes were obtained when comparing to the pure PMIA and commercial polyethylene membrane. The cell exhibited high first-cycle discharge capacity with 145 mAh g −1 and excellent cycling stability with good capacity retention of 93.1% and coulombic efficiency of 99.3% after 100 cycles.
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Chenfei Xiang,Xiuping Wu,Yanjie Zhang,Zihan Zhao,Desheng Li,Hao Song,Bing Li
White light with excellent color rendering property has been highly required for comfortable and healthy illumination. A facile strategy to achieve high color rendering index (Ra >90) in practical applications is using near ultraviolet chips as excitation sources combined with RGB phosphors. However, achieving high color rendering with both blue chips and near-ultraviolet (NUV) chips for commercial phosphors dispersed in phosphor-in-glass (PiGs) materials is still a big challenge. In this work, the PiG based on the ultra-low melting point Sn–F–P–O glass with commercial green (Lu 3 Al 5 O 12 :Ce 3+ ) and red (Sr x Ca 1-x AlSiN 3 :Eu 2+ ) phosphors has been successfully fabricated by one-step sintering method. The phase identification and distribution of monochromatic red phosphor in glass (R-PiG) and green phosphor in glass (G-PiG) were investigated in detail. The Sn 2+ ions in Sn–F–P–O matrix show the intense blue emission bands centered at 420 nm under the excitation of NUV chips (365 nm). Notably, the polychromatic red/green phosphor in glasses (R/G-PiGs) are versatile and exhibited excellent color rendering (Ra = 93, Ra = 95, Ra = 92, respectively) properties excited by both blue chips, NUV chips and laser diodes (WLD). The working temperature of R/G-PiGs is stable at ∼33 °C and ∼55 °C when employed in WLEDs/WLDs (1 W), which greatly prevented the phenomenon of “thermal quenching” for the phosphors caused by high temperature. Thus, the versatile R/G-PiG with ultra-high color rendering and excellent thermal properties indicates its promising application in high-power white LEDs/LDs.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Qian Li,Jiuer Yu,Xiaoxue Zhu,Haojun Liu,Fang Yuan,Yuanmeng Fan,Xuezhong He,Dengji Xiao,Jian Yang
A topological confinement strategy is developed to construct atomically matched F-Nb 2 CT x /Nb 2 O 5 heterointerfaces. • The strongly coupled heterointerface enables 0.16068 |e| charge transfer and generates a built-in electric field. • The built-in electric field synergistically accelerates electron migration and Li + diffusion kinetics. • Excellent rate capability (257.7 mAh g −1 at 5.0 A g −1 ) and cycling stability (125.2% after 550 cycles) are achieved. • This work establishes a new heterointerface engineering paradigm for high-power, long-life lithium-ion battery anodes. Niobium pentoxide (Nb 2 O 5 ) is regarded as a promising anode material for lithium-ion batteries owing to its open-framework structure, competitive theoretical capacity, and intrinsic operational safety. However, its practical application is impeded by intrinsically low electronic conductivity and sluggish lithium-ion diffusion, leading to unsatisfactory rate capability and cycling stability. Herein, we propose a novel topological confinement strategy to construct atomically matched few-layer Nb 2 CT x /Nb 2 O 5 (F‑Nb 2 CT x /Nb 2 O 5 ) heterointerfaces for enhanced electron/ion kinetics. By leveraging the unique two-dimensional geometry of F‑Nb 2 CT x , a natural topological confinement space is established, inducing the in-situ derivation of well-ordered ultrafine Nb 2 O 5 nanocones with atomic-level lattice matching through the shared niobium element. This strongly coupled heterointerface enables electron transfer of 0.16068 |e| from F‑Nb 2 CT x to Nb 2 O 5 and establishes a built-in electric field, synergistically optimizing electron/ion transport kinetics. Benefiting from the strong interfacial coupling, the resulting electrode delivers a high reversible capacity of 430.0mAh g −1 at 0.2 A g −1 and maintains a remarkable rate capability of 257.7mAh g −1 even at 5.0 A g −1 . Moreover, it exhibits exceptional cycling stability with a capacity retention of 125.2% after 550 cycles at 1.0 A g −1 . This work establishes a new paradigm for overcoming the kinetic bottlenecks of oxide anodes through rational heterointerface engineering. A topological confinement strategy is developed to construct atomically matched few-layer Nb 2 CT x /Nb 2 O 5 (F-Nb 2 CT x /Nb 2 O 5 ) heterointerfaces. The unique two-dimensional geometry of F‑Nb 2 CT x provides a natural topological confinement space, directing the in-situ derivation of well-defined ultrafine Nb 2 O 5 nanocones with atomic-level lattice matching through the shared niobium element. This strongly coupled heterointerface enables electron transfer of 0.16068 |e| from F‑Nb 2 CT x to Nb 2 O 5 and establishes a built-in electric field, synergistically optimizing electron/ion transport kinetics. The resulting F‑Nb 2 CT x /Nb 2 O 5 heterostructured anode achieves an exceptional high-rate capacity of 257.7 mAh g −1 at 5.0 A g −1 and remarkable cycling stability, retaining 125.2% of its capacity after 550 cycles at 1.0 A g −1 . This work provides a new paradigm of heterointerface engineering to overcome the kinetic bottlenecks of oxide anodes for high-power, long-life lithium-ion batteries. Download: Download high-res image (207KB) Download: Download full-size image
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WOOD SCIENCE AND TECHNOLOGY
·
2026
·Vol. 60
·期 5
·81
·
IF 3.2
Huang Changzhu,Zhu Yaqin,Luo Yilong,He Bin,Wu Yunfei,Zhang Chunmei,Duan Gaigai,Han Xiaoshuai,Zhou Rongfei,He Shuijian,Jiang Shaohua
Efficient CO 2 capture remains challenging due to limited adsorption capacity and slow kinetics of conventional materials. Herein, we report a strong–weak acid modulation strategy for the in situ growth mesoporous UiO-66-F 4 within the aligned carbonized wood channels, yielding a hierarchical MOF–carbon composite denoted as meso-UiO-66-F 4 @CP. Dual-acid regulation enables highly uniform and controlled MOF growth under environmentally friendly aqueous conditions, avoiding the use of toxic organic solvents and ensuring a sustainable synthesis route. This composite effectively combines the macroporous framework of carbonized wood with the intrinsic micropores and mesopores of UiO-66-F 4 , establishing a hierarchical pore network that significantly enhances CO 2 diffusion, mass transport, and overall adsorption efficiency. Furthermore, the introduction of fluorinated linkers strengthens dipole–quadrupole interactions, generating abundant high-affinity adsorption sites specifically tailored for CO 2 molecules. Under the present experimental conditions, meso-UiO-66-F 4 @CP exhibits a CO 2 uptake of 38 cm 3 g⁻ 1 (approximately 1.70 mmol g⁻ 1 ) at 298 K and 1 bar, together with a measured adsorption rate of 0.085 mmol g⁻ 1 min⁻ 1 . This work provides a sustainable strategy for constructing hierarchical MOF–carbon composites with tailored pore structures and surface chemistry for CO 2 capture applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xing Zhang,Suhang Chen,Haidong Luo,Zhenhua Tang,Enzhou Liu,Zhao Qin,Kangzhen Xu
The rapid redox cycle of metal active sites and effective surface reactions are crucial factors to activate peroxymonosulfate (PMS) for environmental remediation. Herein, a novel F-g-C 3 N 4 /Mn x Co 3−x O 4 composite as high-efficient PMS activator was successfully constructed by a one-step hydrothermal method for the degradation of 1,1-diamino-2,2-dinitroethylene (FOX-7). It was discovered that F doping could narrow the band gap, and enhance the light absorption range and the separation of photogenerated electron-hole pairs. Among all samples, the catalytic activity of F-CN/MCO was higher than that of MCO and CN/MCO. This can be attributed to the unique materials morphology and the synergistic effect of photocatalytic and chemical catalytic driven PMS activation. Quenching experiments and electron paramagnetic resonance (EPR) proved that both radical and non-radical pathways are responsible for the degradation of FOX-7, and singlet oxygen ( 1 O 2 ) was identified as the predominant active species. Importantly, the synergy between Co 2+ /Co 3+ and Mn 2+ /Mn 3+ couples enhanced more electron transfer and better redox potential, thus greatly promoting the photocatalytic activation of PMS. This work provides a novel approach for designing efficient catalyst to promote the redox behavior of metal species in sulfate radical-based advanced oxidation processes.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 12
·1-10
·
IF 6.408
Liu Xiao-Pan,Sun Wen-Qian,Zhao Meng-Ge,Zhang Xing-Jie,Liu Li-Hong,Chen Chang-Po
An easily prepared fluoro-functionalized ionic covalent organic framework (F-iCOF) has been implemented into MALDI-TOF MS, enabling the highly selective enrichment and sensitive determination of perfluorinated sulfonate (PFS) contaminants in a rapid and convenient manner. The good thermal stability and excellent optical absorption properties of F-iCOF makes it a brilliant matrix with no background noise. Moreover, benefitting from the large surface area, appropriate pore size, good water dispersibility, and abundant fluorine atom and cationic characteristic of F-iCOF, it exhibited superior adsorption capacity and enrichment selectivity towards PFSs. Good signal responses for PFSs were obtained in the presence of various interfering compounds such as BSA, HA, or even more than 100-fold excess of glutamic acid and similar in structure sodium alkyl sulfonates, highlighting the specific selectivity of F-iCOF. Calibration curves for potassium perflurobutane sulfonate (PFBSK) in tap water and whole blood were established with good linear correlation in the range 1–500 pg mL −1 . The limits of detection and quantification for PFBSK were as low as 0.04 pg mL −1 and 0.05 pg mL −1 , respectively, which are comparable or better than the existing methods for the determination of PFSs. Graphical Abstract
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 8
·4319-4333
·
IF 11.9
Chaojie Lyu,Jiarun Cheng,Yuquan Yang,Jiwen Wu,Kaili Wu,Yunguo Yang,Woon-Ming Lau,Ning Wang,Dawei Pang,Jinlong Zheng
Highly dispersed Pt NPs anchored in hierarchically N,F co-doped hollow carbon spheres (Pt@N,F-HCS) were synthesized through a template-assisted strategy followed by fluorination and wet chemical reduction. Due to the introduction of F heteroatoms into the carbon skeleton, the degree of d–π electron conjugation between Pt NPs and N,F-HCS can be enhanced. This will lead to higher Ptx+ content in Pt species, which is beneficial for the effective adsorption of *OOH intermediates and is conducive to O–O bond breaking and triggers the direct 4-electron transfer mechanism for the ORR. In particular, the onset potential and half-wave potential values for the ORR are more positive than Pt@N-HCS without F doping, even outperforming 20%Pt/C. Besides, the Pt@N,F-HCS catalyst also possesses the smallest onset potential and largest methanol oxidation current for the MOR. In alkaline media, abundant OH− will be adsorbed around the Ptx+ sites due to its higher positive valence, and the reaction intermediate COads generated in Ptx+ sites will be further oxidized to the final product, CO2, thus improving the MOR activity and CO tolerance capacity. This heteroatom-doping strategy is favorable for enhancing the interaction between Pt NPs and the carbon-based support, and also provides insight to promote the activity and selectivity for direct methanol fuel cells.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Sikpaam Issaka Alhassan,Haiying Wang,Yingjie He,Lvji Yan,Yuxin Jiang,Bichao Wu,Ting Wang,Haiying Gang,Lei Huang,Linfeng Jin,Yongsheng Chen
Bauxite is a widely available Al-O-rich mineral with great potential for abating fluoride. However, low adsorption capacity, a narrow workable pH range, and a lack of clarity on the best removal mechanism hinder its application. In this work, a highly efficient bauxite nanocomposite (Bx-Ce-La@500) was synthesized via doping and pyrolysis , and its fluoride adsorption in industrial wastewater was examined. Doping Ce/La synergistically improved the fluoride adsorption affinity of the composite (from pH PZC 8.0 ~ 10.0) and enhanced the •OH. The materials were characterized by SEM-EDS, BET, XRD, and TGA while XPS, FTIR, and DFT were used to investigate the mechanism of fluoride sorption . Results show that Bx-Ce-La@ 500 has a positive zeta potential of 26.3–23.1 mV from pH 1~ 10. The Langmuir model was the best fit with a maximum adsorption capacity of 88.13 mg/g and removal efficiency up to 100% in 50 ppm F − solution. The high F − removal was attributed to the enhanced surface affinity and the formation of adequate •OH on the material. Except for carbonate and phosphate ions, other ions exhibited negligible effects and the selective removal of F − in real wastewater was high. The main mechanism of adsorption was the ligand/ion exchange and electrostatic attraction.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Huan Chai,Lili Gao,Peng Wang,Feng Li,Guowen Hu,Jun Jin
The application of hematite(α-Fe 2 O 3 )-based photoanodes in photoelectrochemical (PEC) water oxidation has been hampered by disgusting charge recombination and difficult carrier migration. Herein, we modified indium sulfide (In 2 S 3 ) nanoparticles on the surface of fluorine-doped α-Fe 2 O 3 (F-Fe 2 O 3 ) nanorods . The In 2 S 3 /F-Fe 2 O 3 heterostructure bonded by S-O chemical bond shows a superior photocurrent density of 2.21 mA cm −2 at 1.23 V versus reversible hydrogen electrode (around 3.45 times higher than that of pristine α-Fe 2 O 3 ). In-depth investigations show that In 2 S 3 /F-Fe 2 O 3 has significantly increased donor density and decreased charge transfer resistance. Simultaneously, In 2 S 3 decorated with S-O bond could reduce the surface defect states. Further studies of energy band location reveal the formation of type-Ⅱ heterojunction between In 2 S 3 and F-Fe 2 O 3 . The unique heterostructure provides a powerful driving force for charge separation and transport, resulting in satisfactory bulk phase and surface separation efficiency. This work provides ideas for the design and study of multicomponent photoanodes.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Letian Chen,Yongli Liu,Guohao Cheng,Zegang Fan,Jinyu Yuan,Shuailong He,Guifen Zhu
The widespread occurrence of sulfathiazole (STZ) in the environment has raised concerns regarding the potential risks to ecosystem and human health. Thus, there is a need to develop facile and efficient methods for monitoring STZ. In this study, a novel fluorescent probe, based on N, B, F co-doped carbon dots (N, B, F-CDs), was developed for the highly sensitive and selective determination of STZ. The fluorescent N, B, F-CDs were prepared via a one-step hydrothermal method using malonate and 1-allyl-3-vinylimidazolium tetrafluoroborate ionic liquid as precursors. The obtained N, B, F-CDs exhibited excellent fluorescence response toward STZ due to the inner filter effect (IFE), which caused the fluorescence to be quenched. The fluorescent probe allowed the STZ concentration to be accurately determined with a low detection limit of 5.5 ng mL −1 in two wide linear ranges of 0.008–10 μg mL −1 and 10–45 μg mL −1 . The practicability of the fluorescent probe was further validated in river water, soil, milk, and egg samples, and the satisfactory spiked recoveries of STZ ranged from 96.1 to 101.6%. The proposed fluorescent probe based on N, B, F-CDs can be easily prepared and possess high selectivity and sensitivity, thereby displaying its tremendous potential for the identification and determination of STZ in the environment.
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高影响因子
FOOD AND BIOPRODUCTS PROCESSING
·
2020
·
IF 3.726
Yupeng Lin,Hong He,Qun Huang,Fengping An,Hongbo Song
Low-temperature soluble and soft gelation (LT-SG) pectin belonging to special gum is an important food additive. Flash extraction optimization of pectin from passion fruit ( Passiflora edulis f. flavicarpa ) peel at low temperature (50 °C) by response surface methodology and LT-SG properties was investigated in the present study. Under the optimized conditions of a rotation speed of 5000 r/min, extraction time of 9 min, and the liquid–solid ratio of 42:1 mL/g, the pectin yield was 7.52%. The DE value of 57.02% indicated it was high methoxyl pectin, which easily dissolved at a low temperature (70 °C). Gel texture analysis revealed that the soft gelation properties were depended on the sucrose concentration and pH in the pectin solution. Both adding sucrose and decreasing pH refined gel network structure, as results, the gel texture was strengthened.
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Biomass Conversion and Biorefinery
·
2019
·Vol. 10
·期 4
·795-802
·
IF 2.326
Li Yan,Wu Weibo,Li Hu,Zhao Wenfeng,Yang Song
Furfuryl alcohol (FOL) is one of the versatile molecules in the chemical industry, and can be obtained from the biomass-derived furfural (FAL) via selective hydrogenation. In this study, a mild and rapid protocol was developed for the efficient reduction of FAL to FOL in the presence of an eco-friendly ionic liquid tetrabutylammonium fluoride ([TBA]F) using 1,1,3,3-tetramethyldisiloxane (TMDS) as the hydrogen source. After reacting at room temperature for 5 min, a high FOL yield of 97% with a remarkable TOF value of 310 h −1 could be achieved. The activation of TMDS with fluoride was found to play a key role in the acceleration of the hydrogenation process, and ATR-FTIR and HR-MS were used to verify the possible reaction pathway.
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