Small
·
2025
·
IF 12.1
Qian Kong,Chengcheng Yu,Qing Lu,Xingyu Yang,Tongguang Xu,Qi Song,Huatong Li,Zhaoshuo Yuan,Hongyu Liu,Qian Qiao,Gang He,Yufan Wang,Linglong Yao,Xiaoping Dai,Xin Zhang
The electrolysis of water for hydrogen production has gained increasing attention as a sustainable and efficient method to obtain high-purity green hydrogen. The development of efficient catalysts for hydrogen evolution is crucial in order to achieve this target under industrial conditions. The objective of this work is to synthesize a highly efficient F-Co x Fe y (PO n ) z /IF catalyst with ultra-low impedance for hydrogen evolution in electrolytic water by incorporating metal phosphatides into metal oxide nanoclusters through a controlled two-step process involving melting and electrodeposition. The nano-heterostructure of F-Co x Fe y (PO n ) z /IF exhibits a low overpotential of 276 mV at a current density of 1000 mA cm −1 , while having an electrochemical impedance comparable to commercial Pt/C/CP (0.41 Ω), and long-term stability up to 200 h in 1 M KOH electrolyte. The synergistic effect of crystal/amorphous heterojunctions, F doping, and oxygen vacancies further enhances the kinetics of water cracking. Impressively, when combined with NiFeCo LDH/NiS/NF as membrane electrodes, F-Co x Fe y (PO n ) z /IF || NiFeCo LDH/NiS/NF achieves a water decomposition voltage of 2.03 V at a current density of 1000 mA cm −2 and demonstrates stable operation for over 500 h, showing great potential for large-scale commercial production.
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Jinwen Tan,Han Luo,Shiyi Wang,Ling Huang,Liling Cao,Xuehua Dong,Guohong Zou
A short-wave UV antimony(III) oxysalt, RbSb(SO4)(H2PO2)F, by incorporating three different anions (SO42-, H2PO2-, F-) with trivalent antimony cations that possess stereochemically active lone-pair electrons (SCALP), has been successfully synthesized. Significantly, the mixed anions and Sb3+ cations combine to form a low-dimensional 1D infinite anionic chain, denoted as [Sb(SO4)(H2PO2)F]∞-, where synergistic interactions among these units contribute to a substantial birefringence of 0.192 at 546 nm and achieve a short cutoff edge down to 276 nm. This research expands the family of UV birefringent optical materials and provides guidance for the further exploration of novel structural-functional materials.
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DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Zuhong Ji,Yunfei Sun,Xiaodong Guan,Yang Zhou,Junchao Qian,Feng Chen
In this work, the La substitution of iron and replacing the oxygen with fluorine are both adopted to expectantly enhance the rate performance and structure stability of LiFePO 4 during working. The characterizations of X-ray diffraction, scanning electron microscope , transmission electron microscope, charging-discharging tests, electrochemical impedance spectroscopy and safety tests are used to investigate the influences of La 3+ and F − doping on the LiFePO 4 . The results indicate the cathodes after La 3+ doping not only deliver the larger lattice parameters and unit cell volume to broaden the lithium ions migration pathway and accelerate the Li + diffusion speed, but also strengthen the whole bond energy of LiFePO 4 owing to the high bond energy of La–O. In addition, the F replacement of O could increase the length of Li–O bonds and decrease the length of P–O bonds, further be helpful to enhance the Li + diffusion between LiFePO 4 phase and FePO 4 phase due to the weakening of Li–O bonds. Finally, the La 3+ and F − co-doped cathode delivers the superior discharge capacity of 139.3 mAh g −1 at 5C high rate and 127.2 mAh g −1 at −20 °C, with the high discharging capacity of 160.1 mAh g −1 after 100 cycles at 45 °C.
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DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 1.9
Xudong Wang,Yanyang Wu,Tianyou Wang,Bin Wu,Kui Chen,Lijun Ji
M-cresol and p-cresol, typically produced as mixtures in industrial processes, are crucial chemical intermediates. However, their separation is challenging due to their similar structures and properties. ZSM-5 zeolite has shown potential as an adsorbent for separation, while the performance is yet to be improved. In this study, ZSM-5-F(x) was synthesized via hydrothermal method, incorporating F − ions during the synthesis process. The adsorption behaviour of m-cresol and p-cresol on ZSM-5-F(x) was investigated through static experiments, with ZSM-5-F(8) demonstrating the highest selectivity (9.01). Both ZSM-5-F(0) and ZSM-5-F(8) were characterized using XRD, scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) techniques. In addition, the introduction of F − ions increased the material's electronegativity, as demonstrated by the change in zeta potential from 53.22 to −45.93 mV. Single-component adsorption of m-cresol or p-cresol on ZSM-5-F(0) and ZSM-5-F(8) respectively were investigated in detail. The adsorption of m-cresol on ZSM-5-F(8) showed a non-monotonic phenomenon with a significant decrease after 0.06 mol/L. The thermodynamic parameters including Δ G , Δ H , and Δ S were calculated accordingly. All the values |Δ G |, |Δ H |, and |Δ S | of both components on ZSM-5-F(8) were greater than those on ZSM-5-F(0), suggesting that the introduction of F − ions facilitated the adsorption. Competitive adsorption experiments on both ZSM-5-F(0) and ZSM-5-F(8) were conducted at 298.2 K. The results indicated that the selectivity α p/m on ZSM-5-F(8) increased with increasing initial concentration and laid between 13 and 14. After seven consecutive regeneration cycles, the selectivity (α p/m ) only decreased to 13. This study suggests that ZSM-5-F(8) could be a promising adsorbent for m-cresol and p-cresol in industrial applications.
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DOI
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 15
·2705
·
IF 3.06
Feng Li,Sen Guo,Shanshan Zhang,Sainan Peng,Wei Cao,Chi-Tang Ho,Naisheng Bai
Bee pollen contains all the essential amino acids needed by humans. China is the largest producer of bee pollen in the world. In the present study, we identified 11 fatty acids inF. esculentumbee pollen oil by GC-MS analysis, and 16 compounds were isolated fromF. esculentumbee pollen by column chromatography and identified. A high-performance liquid chromatography-diode array detector (HPLC-DAD) method was established for the quality control ofF. esculentumbee pollen. A validated HPLC-DAD method was successfully applied to the simultaneous characterization and quantification of nine main constituents in seven samples collected from seven different areas in China. The results showed that all standard calibration curves exhibited good linearity (R2> 0.999) in HPLC-DAD analysis with excellent precision, repeatability and stability. The total amount in the samples from the seven regions ranged from 23.50 to 46.05 mg/g. In addition, seven compounds were studied for their bioactivity using enzymic methods, whereby kaempferol (3) showed high α-glucosidase inhibitory activity (IC50: 80.35 μg/mL), ergosterol peroxide (8) showed high tyrosinase inhibitory activity (IC50: 202.37 μg/mL), and luteolin (1) had strong acetylcholinesterase inhibitory activity (IC50: 476.25 μg/mL). All results indicated thatF. esculentumbee pollen could be a nutritious health food.Keywords:bee pollen;enzyme inhibitory activity;HPLC-DAD;GC-MS;quality analysis
研究领域:
植物化学
·
食品科学
·
药理学
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DOI
PubMed
高影响因子
Frontiers in Microbiology
·
2022
·
IF 6.064
Le Su,Feifan Ma,Zaiyong An,Xiuyu Ji,Ping Zhang,Qiulin Yue,Chen Zhao,Xin Sun,Kunlun Li,Baojun Li,Xinli Liu,Lin Zhao
Because of the increased incidence and prevalence, ulcerative colitis (UC) has become a global health issue in the world. Current therapies for UC are not totally effective which result in persistent and recurrent symptom of many patients. Lactobacillus with anti-inflammatory effects might be beneficial to the prevention or treatment for UC. Here, we examined the ameliorative effects of the metabolites of Lactobacillus fermentum F-B9-1 (MLF) in Caco-2 cells and dextran sodium sulfate (DSS)-induced UC model mice. MLF displayed intestinal barrier-protective activities in Caco-2 cells by increasing the expression of Occludin and ZO-1. They also showed anti-inflammatory potential in interleukin (IL)-1β and IL-6. In order to further examine the in vivo anti-inflammatory effect of MLF, the MLF was gavaged in the DSS-induced UC model mice. The intragastric administration of MLF effectively alleviated colitis symptoms of weight loss, diarrhea, colon shortening, and histopathological scores, protected intestinal barrier function by increasing Occludin and ZO-1, and attenuated colonic and systemic inflammation by suppressing production of IL-1β and IL-6. Finally, the use of MLF remodeled the diversity of the gut microbiota and increased the number of beneficial microorganisms. Overall, the results demonstrated that MLF relieved DSS-induced UC in mice. And MLF might be an effective therapy method to UC in the clinic in the future.
研究领域:
胃肠病学
·
微生物学
·
免疫学
·
药理学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xiang Yu,Yu Zhang,Lan Jin,Jingyu Chen,Zhenhua Jiang,Yunhe Zhang
Polymeric piezo-damping composites with robust piezo-damping performance under high temperature steam conditions are highly desirable. In this study, we demonstrate a novel piezo-damping material, consisting of fluorinated (polyaryletherketone)-(polydimethylsiloxane) block copolymers (F-PAEK-b-PDMS) as matrix, multi-walled carbon nanotubes (CNTs) as conductive filler, and barium titanate (BT) as piezoelectric phase. Taking the advantages of hydrophobic property of PDMS and good thermal stability of F-PAEK, piezo-damping materials exhibit good stability under high temperature steam conditions. Furthermore, for the incompatibility between F-PAEK and PDMS, microphase separation appears, which can greatly increase the friction between molecules for better damping capability. Good damping performances that loss factor > 0.3 over a broad temperature range of 55–115 °C (≈60 °C) can be achieved. Those outstanding performances can effectively broaden the practical application of piezo-damping composites under harsh conditions.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 36
·18616-18625
·
IF 14.511
Xiukun Liu,Xu Xu,Fangjia Zhang,Xiangchao Ge,Haifeng Ji,Yuqi Li,Shaorong Lu,Zhen Wen
A sustainable, reliable and self-powered anti-corrosion method for metallic structures is key to improving the operation stability and service life of equipment. In this work, a series of durable superhydrophobic fluorinated silica (F-SiO2)/epoxy resin (FE) coatings with good corrosion resistance were prepared via a simple spraying method, which were further used to fabricate a FE based triboelectric nanogenerator (FE-TENG). A synergistic anti-corrosion system for self-powered cathodic protection constructed using the superhydrophobic FE coating and a water wave-driven FE-TENG was then proposed. In a 3.5 wt% NaCl solution, the corrosion potential (Ecorr) of an aluminum (Al) sheet protected by the FE-TENG self-powered cathodic protection was slightly decreased by 80 mV. However, when the Al sheet was coated with a FE superhydrophobic coating, the Ecorr was significantly reduced by 460 mV under FE-TENG protection. Notably, the Ecorr of 304 stainless steel protected by the synergistic anti-corrosion system was dramatically decreased by ∼745 mV. Furthermore, an application in marine corrosion protection was demonstrated by using a float-like spherical FE-TENG. This work demonstrates a cost-effective and large-scale strategy for preparing a superhydrophobic FE coating, using which a self-powered synergistic anti-corrosion system is built for effectively protecting metals from corrosion.
研究领域:
材料科学
·
腐蚀与防护
·
纳米能源
·
表面工程
·
功能材料
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zuocheng Luo,Qingfeng Zhang,Wei Xie,Tong Yuan,Qisheng Zang,Ning Wang,Hanxiao Fan,Shuhong Xie,Xiaoping Ouyang
Potassium ion hybrid capacitors (PIHCs) have attracted widespread attention as combining the advantages of potassium ion batteries (PIBs) with supercapacitors . However, the sluggish kinetics caused by the large radius of K + hinder the practical application of PIHCs. Herein, we synthesized a boron and fluorine co-doping interlaced network porous carbon nanofibers (BF-PCNFs), which was used as the freestanding anode of PIHCs the freestanding anode of PIHCs to alleviate large volume expansion and increase conductivity. Benefiting from the B, F co-doping and porous interlace nanostructure of BF-PCNFs, the anode shows 185 mA h g −1 under a load of 12.6 mg cm −2 , a reversible capacity of 176 mA h g −1 at 1000 mA g −1 after 6000 cycles, and the capacity retention from 100 mA g −1 to 5000 mA g −1 is 62%. Furthermore, the PIHCs based on BF-PCNFs as anode and activated carbon as cathode exhibit an energy density of 87 Wh kg −1 and a power density of 393 W kg −1 . The capacity retention is as high as 78% over 4000 cycles. Considering the exceptional rate performance, long cyclability and high-mass-loading, our work may supply a new strategy for designing novel energy storage devices with outstanding performance.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米科技
·
功能材料
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DOI
高影响因子
IONICS
·
2019
·Vol. 26
·期 2
·627-637
·
IF 2.289
Zhai Huanhuan,Shuai Yi,Wang Yu,Chen Kanghua
As a negative electrode material, the main drawbacks of Li 4 Ti 5 O 12 (LTO) are its low electric conductivity and poor Li-ion diffusion coefficient. Fortunately, elements modification to address these problems is an effective method. Herein, we firstly report Ni and F co-modified LTO material which is synthesized via a solid-state reaction. Powder X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy were conducted to investigate the structure and morphology. Afterwards, we surprisingly find that Ni and F co-modification can reduce the overall charge transfer resistance of LTO for part of Ti 4+ converts into Ti 3+ and Ni 2+ ions supply the charge carriers. When test in battery, a superior discharge capacity of 236.1 mAh g −1 at 0.036 A g −1 is obtained, much higher than that of pristine LTO (196.9 mAh g −1 ). Furthermore, it still retains a discharge capacity of 174.6 mAh g −1 after 200 cycles at 0.18 A g −1 and exhibits an excellent rate performance.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2014
·Vol. 26
·期 2
·884-890
·
IF 1.966
Li Rui,Wang Yan-ze,Mao Zhi-yong,Wang Da-Jian
A remote phosphor coating by using Sr 3 (Al,Si)(O, F) 5 :Ce 3+ (SASF:Ce 3+ ) on glass substrate was prepared by a simple and convenient screen printing method. The crystalline phase and the distribution of SASF:Ce 3+ crystals in coating were investigated by XRD and SEM, respectively. The scattering light and absorption light properties of remote phosphor coating with different thicknesses were discussed through Lambert–Beer’s law. The relationship between luminous efficiency and absorption coefficient was demonstrated. White light emitting diode prototype fabricated with blue chip and the prepared patterned SASF:Ce 3+ remote phosphor in this work showed excellent performances, opening a cost-effective process to generate planar white light.
研究领域:
材料科学
·
光学工程
·
发光材料
·
固态照明
·
功能涂层
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yan Chen,Chunli Hu,Zhi Fang,Yilin Li,Jianggao Mao
Birefringent materials capable of modulating the polarization of light have attracted intensive studies because of their wide utilization in optical communication and the laser industry. Herein, two new lead(II)-based cyanurates, namely, Pb(H2C3N3O3)X (X = OH, F), were synthesized by hydrothermal methods, and the first halogen-containing metal cyanurate Pb(H2C3N3O3)F was successfully obtained by the rational substitution of a homovalent anion. Pb(H2C3N3O3)X (X = OH, F) belong to space group P1̅, and their structures display a neutral [Pb(H2C3N3O3)X] (X = OH, F) layer. The Pb2+ ions in Pb(H2C3N3O3)(OH) are interconnected by hydroxyl groups and oxygen atoms of cyanurate anions into a 1D [PbO(OH)]− chain, whereas the Pb2+ ions in Pb(H2C3N3O3)F are interconnected by F– anions and oxygen atoms of cyanurate anions into a 2D [PbOF]− layer. The π–π interactions between adjacent hydroisocyanurate rings and the hydrogen bonds between neighboring neutral layers provide additional stability to the structures. Luminescent studies show that Pb(H2C3N3O3)(OH) and Pb(H2C3N3O3)F emit yellow-green and blue light, respectively. Theoretical calculations unveiled their birefringences of 0.079 and 0.203@1064 nm and their band gaps of 3.96 and 4.96 eV, respectively, for OH– and F– containing materials. Obviously, the substitution of OH– by F– with the largest electronegativity can simultaneously improve both the birefringence and band gap.
研究领域:
材料科学
·
光学材料
·
无机化学
·
固态化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）