APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Ziwen An,Qihao Xie,Shaohan Xu,Baoling Niu,Lingzhi Sun,Jingui Zheng,Guohua Zhao
Perfluorooctanoic acid (PFOA), a synthetic persistent and bio-accumulative chemical, has raised global concerns. PFOA oxidation by advanced oxidation technology (AOPs) begins with decarboxylation, followed by CF 2 groups unzipping cycle and C–F cleavage. Since reactive radicals (even •OH) cannot initiate decarboxylation and abundant low-toxicity organics hinders decarboxylation, presents significant challenges for defluorination. We designed a functionalized high-index (201) TiO 2 photoanode (S-TiO 2,201 ) capable of molecular recognition and activation, which switches PFOA adsorption from carboxyl groups to preferential adsorption via the perfluoroalkyl backbone. This adsorption configuration selectively recognizes PFOA and accelerates decarboxylation via direct hole oxidation. In situ electron paramagnetic resonance (EPR) confirmed faster decarboxylation and •OH quantification showed hole utilization efficiency rising from 9.6 % to 39.3 % after functionalization. PFOA was selectively removed from 200 μg/L to 1.2 μg/L with 1000-fold humic acid interference. This work presents a strategy for efficient and selective PFOA removal by precisely modulating its adsorption configuration.
研究领域:
环境化学
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光化学
·
材料科学
·
水处理技术
·
电化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Qiuyao Jiao,Yan Liu,Ran Yu,Lei Li
For supported heterogeneous catalyst, metal-support interaction (MSI) is very important factors for catalytic performance. Commercial γ-alumina was reduced with hydrogen in advance, providing strong anchoring sites for metal (metal oxide) species. This research demonstrates the use of pre-reduced alumina as catalyst carrier to anchor metal Co species in FTS compared with unreduced one. The defective alumina supported catalyst displayed a supeior performance. The Co/RAl2O3-550 catalyst showed surprisingly high CO conversion of 56.0%, C5+ hydrocarbons selectivity of 93.2%, and a low methane selectivity of 2.7% at a remarkable high activity (CTY = 1.1 × 10-5 molCO gCo-1 s−1). It revealed the strong reduction of alumina generated more defective sites, which was strongly anchored with metal cobalt species under MSI. Besides, the reduction of alumina also boosted the number of surface L-acidity, promoting the CO absorption rate through CO dissociation. These results reveal the unique property of defective Al2O3 supported cobalt catalysts, and provide a practical strategy to explore stable and efficient FTS catalysts.
研究领域:
催化化学
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材料科学
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化学工程
·
表面化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Qiyuexin Wang,Hanyu Li,Huan Li,Xueying Yang,Fangcheng Qiu,Dacheng Zhou,Zhengwen Yang,Xin Zhen,Jianbei Qiu
The implementation of liquid organic hydrogen carriers (LOHCs) is constrained by the high energy consumption and strong dependence on precious‑metal catalysts in conventional thermal processes. This work develops a fluorine-doped Mo-Ni-F/NF bifunctional electrode through a simple electrochemical deposition-sintering method for efficient electrochemical hydrogen storage using quinoxaline under ambient conditions. XRD and TEM characterization revealed a unique structure comprising a MoNi₄ shell with embedded Ni nanoparticles, while SEM and EDS mapping confirmed uniform fluoride distribution and enhanced surface morphology. XPS analysis indicated that fluoride modification improved surface characteristics without altering chemical states. The catalyst demonstrates exceptional performance in reversible quinoxaline hydrogenation (92.1 % conversion after 5 h, 95.6 % FE) and dehydrogenation (100 % conversion after 4 h, 97.2 % FE). DFT calculations showed that electron transfer between MoNi₄ and nickel nanoparticles enhanced catalytic activity, while fluorine modulation reduced the adsorption energy of quinoxaline on nickel (111) from −2.84 eV to −0.55 eV, and tetrahydroquinoxaline from −2.08 eV to −0.84 eV, mitigating catalyst poisoning. In situ Raman spectroscopy identified dynamically formed NiOOH as the active phase, which facilitates proton-coupled dehydrogenation via -OH/μ-O-Ni intermediates. This work provides novel catalytic materials and mechanistic insights for the development of low-cost, room-temperature, and highly effective electrochemical LOHC systems.
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BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 11.8
Li Jinsong,Shi Xiaoxia,Yang Huihuang,Cai Li,Li Zhongbo,Zhang Lijun
Urea is a key biomarker for diagnosing various kidney and liver disorders, which can be assessed through sensing platforms. However, existing urea sensors have performance issues in real samples. Herein, a novel fiber-organic electrochemical transistor (F-OECT) sensing platform was constructed by sequentially depositing cobalt-based metal-organic framework material (ZIF-67), carboxylated multi-walled carbon nanotubes, poly (3,4-ethylenedioxythiophene), and urease on cotton fibers for urea determination. The resulting F-OECT sensor exhibited excellent performance toward urea detection with a high sensitivity (82.91 μA/decade). This performance is attributed to the synergistic effect of the hierarchical composite: the significantly enlarged electrochemically active surface area of PEDOT/f-MWCNT/ZIF-67 facilitates high-density urease immobilization, while the conductive network ensures efficient signal transduction, coupled with the intrinsic signal amplification of the OECT architecture. Under optimized conditions, the F-OECT sensor illustrated a wide linear response range (1 pM-10 mM) and a low detection limit of 1 pM toward the detection of urea, coupled with an excellent selectivity, reproducibility, and stability. More importantly, the F-OECT sensor was able to detect urea in real sweat and urine samples. Based on these encouraging data, the F-OECT sensor was connected to a printed circuit board to transmit signals via Bluetooth, and the results showed a sensor capable of visually quantifying urea. Overall, the proposed F-OECT sensor looks promising for future non-invasive and sensitive liquid detection of urea, thereby deserving further research and development.
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DOI
PubMed
高影响因子
Journal of Material Cycles and Waste Management
·
2023
·Vol. 25
·期 4
·2485-2497
·
IF 3.1
Wei Jie,Liu Zhanwei,Yan Hengwei,Yang Wanzhang
Herein, fluorine fixation, nitrogen removal, and the alkaline solution recovery of alumina were studied using calcium-based high-temperature soda roasting. In addition, the effects of roasting conditions, dissolution conditions, and additives (carbon alkali and calcium salt) on fluorine fixation and alumina recovery were studied. The results show that when the roasting temperature was 1100 ℃ and the roasting time was 2 h, the dissolution temperature was 80 °C, while the dissolution time was 20 min. The ratio of soda to dross was 1.0, and 30 wt% CaCO 3 had been added as a fluorine fixing agent. The Al extraction rate from aluminum dross (AD) reached 86.21%, the denitrification rate reached 99.54%, the concentration of soluble fluoride ion was reduced to 0.111 g·L −1 , and the fluoride fixation rate was 75.04 wt%. CaF 2 is the main component of the leaching residue, which can be added as an insulation material for electrolysis. Alkaline oxidation roasting and calcium-based fluoride fixation are effective methods to separate aluminum, fluoride, and nitrogen. This study provides a new method for the safe and efficient utilization of AD.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Xue Bai,Wen Li,Aijia Wei,Qian Chang,Lihui Zhang,Zhenfa Liu
Spinel Li 4 Ti 5 O 12 doped with F was synthesized via the solid-state reaction of anatase TiO 2 , Li 2 CO 3 , and NH 4 F. The structural characterization and electrochemical performance evaluation of the prepared materials were carried out utilizing X-ray diffraction, scanning electron microscopy, galvanostatic charge-discharge, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) tests. The lattice parameters of all samples were calculated using an internal standard and Rietveld refinement method. The results indicate that the F was successfully doped into the lattice structure of Li 4 Ti 5 O 12 , and this process did not influence the crystal structure and superficial morphology. Moreover, the best-performing material, Li 4 Ti 5 O 11.9 F 0.1 delivers superior rate capacities of 165, 162.1, 160.0, 142.3, 125.1, and 99.2 mAh g −1 , at 0.2 C, 0.5 C, 1 C, 3 C, 5 C, and 10 C, respectively, which is higher than those of Li 4 Ti 5 O 12 (150.0, 135.0, 123.5, 93.7, 76.4, and 56.8 mAh g −1 at the same C-rates), and the cycling retention is 82.7% after 150 cycles at 5 C. Meanwhile, the charge-transfer resistance (R ct ) of Li 4 Ti 5 O 11.9 F 0.1 (56.4 Ω) is lower than that of pure Li 4 Ti 5 O 12 (80.6 Ω), and the lithium-ion diffusion coefficients (D Li + ) of Li 4 Ti 5 O 11.9 F 0.1 (2.505 × 10 −10 cm 2 s −1 ) is higher than that of pure Li 4 Ti 5 O 12 (1.694 × 10 −10 cm 2 s −1 ).
研究领域:
材料科学
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电化学
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能源存储
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无机化学
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固体化学
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DOI
高影响因子
Coatings
·
2026
·Vol. 16
·期 7
·767
·
IF 3.4
Dong Chen,Xiaoping Huo,Qitai Guo,Tao Liu,Shiqiang Luo,Yue Zhang,Sude Ma
Conventional epoxy adhesives used in motor insulation structures still suffer from insufficient thermal resistance and difficulty in balancing heat resistance with mechanical reliability. In this study, BMI-modified E-51/MeHHPA/EMI-24 epoxy composites were prepared and evaluated as heat-resistant interfacial adhesives for simulated F-class pole windings. BMI/EP composites with different BMI contents were fabricated by melt blending and characterized in terms of curing kinetics, FTIR, mechanical properties, and thermal performance. The optimized formulation was then applied to bond Nomex insulation paper to the upright plate in a simulated pole winding. The results showed that BMI did not alter the main epoxy/anhydride curing pathway, but restricted segmental motion and improved thermal resistance. The 10phr BMI/EP composite exhibited a favorable balance among thermal performance, mechanical properties, and fracture morphology. The simulated winding prepared with this formulation showed no breakdown or flashover under 6800 V/60 s, with an insulation resistance of 64.49 GΩ. A lower-bound apparent temperature index of approximately 157 °C was obtained using the TGA-derived thermal life equation. These results indicate that this system has preliminary application potential as a heat-resistant interfacial adhesive for F-class motor winding insulation, although a complete thermal life assessment is still required.
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CONSTRUCTION AND BUILDING MATERIALS
·
2026
·
IF 8.9
Zhili Han,Zhiyong Liu,Bo Pang,Siyi Ju,Jinyang Jiang
Cementitious substrates are porous, rough, and alkaline. These characteristics make amphiphobic coatings prone to interfacial failure and make it difficult to simultaneously maintain liquid repellency, adhesion, and functional stability. Existing fluorinated, fluorine-free, and organic–inorganic hybrid amphiphobic coatings can achieve high contact angles on smooth substrates, but their engineering adaptability to rough, porous, and highly alkaline cementitious substrates still needs to be improved. In this study, a waterborne fluorinated emulsion (WFE) was used as the film-forming matrix. Fluorinated SiO 2 (F-SiO 2 ) was introduced to build a micro/nano rough structure. KH-560 and a water-dispersible isocyanate were also added to strengthen the interface and the bulk phase. Unlike previous studies that mainly focused on static contact angles, this work establishes a formulation-structure-adhesion relationship for waterborne amphiphobic coatings on porous and alkaline cementitious substrates. As the ratio of m(binder):m(F-SiO 2 ) changed from 1.0:0–0.2:1.0, the water contact angle increased from 78.0° to 152.3°, and the oil contact angle increased from 40.0° to 143.1°. This indicates a transition from a Wenzel-dominated state to a Cassie–Baxter composite wetting state. A clear transition region appeared near 1.0:0.5. The ratio of 0.5:1.0 was selected as the most balanced formulation among the tested groups because it achieved comparable liquid repellency with better adhesion balance and lower filler loading. After KH−560 and isocyanate were added, the pull-off adhesion strength increased from 1.52 MPa to 2.03 MPa. After immersion in acid/alkali solutions for 48 h, immersion in deionized water for 7 d, 100 cycles of mechanical abrasion, and UV aging for 7 d, the optimized coating still maintained high water and oil repellency, indicating short-term functional retention under laboratory exposure conditions. These results provide an effective strategy for preparing waterborne amphiphobic coatings with balanced liquid repellency, interfacial adhesion, and short-term functional stability on cementitious substrates.
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CHEMISTRY & BIODIVERSITY
·
2025
·
IF 2.5
Zhi-Wen Wan,Rui Meng,Hua-Yuan Yang,Xing Yang,Qin Zhou,Min Wu,Bin Li,Xia Zhang
Rosa roxburghii f. eseiosa Ku, a thornless variety of Rosa roxburghii Tratt, remains underexplored regarding the tissue-specific functionality and structure-activity relationships of its polysaccharides. This study systematically investigated the composition and bioactivities of polysaccharides extracted from the fruit, root, stem, and thick stem of this variant. Using gradient ethanol precipitation (40%, 60%, and 80%), polysaccharides with distinct molecular weight (M w ) profiles were obtained. All isolates were identified as acidic heteropolysaccharides with complex and tissue-dependent monosaccharide compositions. Fractions precipitated with 60% and 80% ethanol exhibited lower M w s and significantly enhanced bioactivities, including potent radical scavenging capacity and α -glucosidase inhibition. Notably, RREK-R60, the crude polysaccharide obtained from the roots of Rosa roxburghii f. eseiosa Ku via 60% ethanol precipitation, exhibited a notable α -glucosidase inhibition rate of 92.91%. Structural analysis revealed tissue-specific traits, such as the unique presence of N-acetylglucosamine in fruit and root samples, along with elevated uronic acid, galactose, and arabinose content, which correlated strongly with bioactivity. These findings underscore the potential of Rosa roxburghii f. eseiosa Ku polysaccharides as functional food ingredients or anti-diabetic agents. Further in vivo studies and detailed structural elucidation are warranted to fully establish their structure-activity relationships. Graphical The graphical abstract comprises three sections. The left panel shows the distribution of different tissues of Rosa roxburghii f. eseiosa Ku. The middle illustrates the flowchart for the extraction and purification of crude polysaccharides. The right section presents Key Findings on Bioactive Polysaccharides from Rosa roxburghii f. eseiosa Ku. This figure summarizes the structure-activity relationships of polysaccharides from various tissues of the plant. Major findings include: 1) N-Acetylglucosamine content positively correlates with 2,2-diphenylpicrylhydrazyl radical scavenging activity; 2) Polysaccharides obtained with 60–80% ethanol exhibit superior antioxidant capacity, attributed to lower molecular weight and higher polyphenol content; 3) Higher galactose content in RREK-F60 and RREK-R60 enhances 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radical scavenging; 4) RREK-R60 shows remarkable α-glucosidase inhibition (92.91%), likely due to its high arabinose, glucose, and xylose composition.
研究领域:
植物生物化学
·
功能食品
·
天然产物化学
·
植物化学
·
糖尿病研究
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 3
·036509
·
IF 3.9
Zibo Zhai,Hongwei Li,Chuang-an Zhou,Hui Zheng,Yao Liu,Wei Yan,Jiujun Zhang
Layered double hydroxide (LDH) catalysts provide promising OER activity which can be employed in overall water splitting for hydrogen production. However, their weak surface hydrogen adsorption (Had) and high water dissociation energy can result in the inferior hydrogen evolution reactions (HER) activity. In this paper, a highly efficient HER catalyst of F-doped NiCoMo LDH is successfully designed and synthesized through in situ growing on nickel foam (F-NiCoMo LDH/NF) for overall water splitting. DFT calculations demonstrate that the introduction of Mo and F atoms in NiCo LDH can induce the generation of anisotropic lattice strain, resulting in the generation of high-energy active interface and shifting the d-band centers. Therefore, the adsorption energy of Had is optimized and the water dissociation energy barrier is decreased. As a result, this F-NiCoMo LDH/NF catalyst electrode displays a low overpotential of 107.5 mV at 10 mA cm−2 and a small Tafel slope of 67.2 mV dec−1 for HER. The assembled electrolyzer by employing this catalyst electrode requires only 1.83 V to deliver 300 mA cm−2 and operates stably for 100 h.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 13
·10898
·
IF 5.6
Zhiying Liang,Yafen Guo,Duan Pi,Xiang Li,Bingying Li,Yongsi Huang,Xiaohong Song,Ramji Kumar Bhandari,Xuegeng Wang
Bisphenol F (BPF) has been used in the syntheses of polymers, which are widely used in coatings, varnishes, adhesives, and other plastics. During the past decades, BPF contamination in the aquatic environment has dramatically increased due to its release from manmade products. Concerns have driven much attention to whether it may adversely impact aquatic lives or human beings. The present study performed an acute toxic exposure experiment and a 15 d developmental exposure of BPF at environmental concentrations (20, 200, and 2000 ng/L) using Chinese medaka (Oryzias sinensis). In the acute toxic exposure, the LC50of BPF to Chinese medaka is 87.90 mg/L at 96 h. Developmental exposure induced a significant increase in the frequency of larvae with abnormalities in the 2000 ng/L BPF group compared to the control group. Transcriptomic analysis of the whole larvae revealed 565 up-regulated and 493 down-regulated genes in the 2000 ng/L BPF exposure group. Analysis of gene ontology and KEGG pathways enrichments indicated endocrine disorders to be associated with BPF-induced developmental toxicity. The present results suggest that BPF is developmentally toxic at 2000 ng/L concentration in Chinese medaka and causes endocrine-related aberrations in the transcriptional network of genes.Keywords:Bisphenol F;Chinese medaka;toxicity;developmental defects;endocrine disruptor
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Qi Zhao,Ye Yuan,Luyan Zhang,Liang Qiao,Cheng Ding,Kangshun Wang,Hongpeng Li,Jun Ma,Panpan Wang,Tianming Chen,Feihong Wang
Nonmetal doping is widely used in the modification of titanium dioxides (TiO 2 ) for photocatalytic applications. As a typical two-dimensional layered nanomaterial, the excellent physical and chemical properties of MXene materials have been the focus of current research. In this study, carbon and fluorine co-doped MXene derived TiO 2 nanosheets (labelled as C-F-TiO 2 ) were successfully synthesized and used as catalysts for degrading 2,4,6-trichlorophenol (2,4,6-TCP) under UV light irradiation. The C-F-TiO 2 with ultrathin nanosheet structure enhanced light absorption range and decreased the bandgaps. The degradation efficiency of 2,4,6-TCP by C-F-TiO 2 was over 99 % in 90 min, and the degradation rate was more than twice that of commercial TiO 2 . The degradation rate still remained about 90 % in 90 min after five cycles. The results of quenching experiments and electron spin resonance (ESR) illustrated that more reactive oxygen species (ROS) were generated in the C-F-TiO 2 /UV system, which was 1.5 times that of commercial pure TiO 2 , and • O 2 – was the dominant ROS for 2,4,6-TCP degradation. This study provided insight to utilize physicochemical characteristics of MXene to synthesize non-metal co-doped TiO 2 nanosheet as a catalyst, exhibiting excellent reactivity in the potential application for organic pollutant degradation.
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