JOURNAL OF CHROMATOGRAPHY A
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2025
·
IF 4
Zhuoning Li,Xiaoli Wang,Leilei Wang,Lu Liu,Lingxi Zhao,Na Li,Hailong Jiang,Zhineng Hao,Jingfu Liu,Xiangfeng Chen,Rusong Zhao
Sensitive monitoring of per- and polyfluoroalkyl substances (PFASs) is critical for environmental and health risk assessment. In this work, metal-organic frameworks (MOFs) functionalized with positively charged tertiary amines (UiO-67-CH 2 -N(CH 3 ) 2 ) were synthesized by the one-pot route, which integrated solvothermal MOFs assembly and in-situ reductive amination of formyl groups. The fabricated UiO-67-CH 2 -N(CH 3 ) 2 exhibited exceptional performance as adsorbents for solid-phase extraction (SPE), and the efficient adsorption of PFASs was attribute to the electrostatic attraction and hydrogen bonding. The proposed SPE-HPLC-MS/MS method demonstrated low limit of detection (0.02-0.88 ng·L −1 ), good linearity (0.2-400 ng·L −1 ) and high precision (RSD < 8.18 %). The effectiveness of the established method was assessed through the analysis of PFASs in environmental waters, and recoveries in spiked samples were 84.0-117 % with RSD < 13 %. This study highlighted the efficacy of the functionalized UiO-67-CH 2 -N(CH 3 ) 2 in trace PFASs analysis, advancing their application in environmental monitoring.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Shuaijun Yu,Yazhen Jiang,Geting Xu,Hongyu Liu,Edison Huixiang Ang,Junbin Liao,Jiangnan Shen
In the context of industrial effluent management, the application of electrodialysis (ED) for the recovery of sulfuric acid has attracted significant interest. Despite the technological promise, the employment of traditional anion exchange membranes (AEMs) is frequently marred by substantial proton leakage, a pervasive issue that markedly degrades the effectiveness of acid recovery. To address this challenge, we embarked on a novel approach utilizing a polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP) substrate. This innovative method harnessed the inherent properties of fluorine-containing groups within PVDF-HFP to provide robust acid stability, while incorporating tertiary amine groups to minimize water uptake resulted in the creation of a proton-blocking AEM. A distinguishing feature of this AEM is its thermally cross-linked diene structure, which not only preserves acid concentration properties but also considerably reduces water migration. Moreover, our investigation undertakes an exhaustive examination of the recycling concentration and water transport within the acid recovery framework, alongside the intricate interplay with energy expenditure. This investigation could facilitate the adoption of industrial acid recovery methods utilizing AEMs designed for minimal water uptake and enhanced acid-blocking capabilities.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2022
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IF 7.336
Liang Lu,Hao Yuan,Chunwen Sun,Bingsuo Zou
Low-cost sodium metal batteries are expected to be used as an effective supplement to lithium-ion batteries in the energy storage field in the future, and have made great progress in recent years. However, the safety issues caused by Na dendrites and the relatively low specific capacity of sodium metal batteries are obstacles to their further commercialization. In this work, a thin Na-Ti 3 C 2 T x composite anode was prepared. The thickness of the composite anode Na-Ti 3 C 2 T x is only 46% of that of pure sodium, greatly reducing costs and increasing energy density. In addition, the nucleation overpotential of Na-Ti 3 C 2 T x is 55.2% and 56% that of Na at 0.5 mA cm −2 and 2 mA cm −2 respectively, which indicates that the composite anode reduces the sodium nucleation barrier and is favorable for sodium deposition. Furthermore, the poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and Na 3 Zr 2 Si 2 PO 12 modified polyimide membrane significantly enhances the mechanical strength and sodium ion migration and promoted the deposition and stripping of metallic sodium. The sodium battery with the composite metal sodium anode and PVDF-HFP-Na 3 Zr 2 Si 2 PO 12 modified polyimide membrane has a specific discharge capacity of 87.9 mAh g −1 , and the capacity retention rate is close to 100% without significant fluctuation after 500 cycles.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Coatings
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2017
·Vol. 7
·期 8
·117
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IF 2.175
Wenjing Xia,Nianqing Zhu,Rongjie Hou,Wengui Zhong,Mingqing Chen
The polyurethane prepolymer terminated with a double bond was synthesized using isophorone diisocyanate (IPDI), hydroxyl terminated polybutadiene (HTPB), 1,4-butanediol (BDO), and 2-hydroxyethyl acrylate (HEA). Then, a series of innovative UV-curable polyurethane coatings were prepared by blending ene-terminated polyurethane, fluoroacrylate monomer, and multifunctional thiol crosslinker upon UV exposure. The incorporation of fluoroacrylate monomer and multifunctional thiols into polyurethane coatings significantly enhanced the hydrophobic property, mechanical property, pencil hardness, and glossiness of the polyurethane coatings. This method of preparing UV crosslinkable, hydrophobic polyurethane coatings based on thiol-ene chemistry exhibited numerous advantages over other UV photocuring systems.Keywords:polyurethane;fluorine-containing;UV-crosslinkable
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
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2025
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IF 5
Yaqi Zhao,Xiuhua Chen,Zhengjie Chen,Wenhui Ma,Shilong Ye,Zirui Li,Xiaowei Chen,Yonghang Zhang
The efficient purification of microcrystalline graphite is the key to its high-value applications. Therefore, this study proposes a synergistic purification method involving ammonium fluoride roasting and ethylenediaminetetraacetic acid (EDTA) complex leaching. Using natural microcrystalline graphite (MG) as the raw material, the ammonium fluoride roasting process was optimized by response surface methodology (RSM), and the fixed carbon content of the roasted purified microcrystalline graphite (RMG) was obtained at 97.76 %. After subsequent EDTA complex leaching, the fixed carbon content in the final ERMG product reached 99.86 %. The MgF 2 component in the impurities was used as a representative model system for kinetic analysis, which indicated that the leaching process occurred in two stages. The first stage was controlled by the pore volume diffusion model, while the second stage was jointly controlled by interfacial transfer and product layer diffusion. Structural characterization confirmed that this process introduced nitrogen/fluorine co-dopants, which increased the interlayer spacing of graphite and formed macropores and mesopores. This method reduced the reliance on highly corrosive reagents, providing a promising alternative for the high-value utilization of microcrystalline graphite.
研究领域:
材料科学
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无机化学
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化学工程
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矿物加工
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碳材料
✓ 已验证
产品关联
DOI
高影响因子
PLANT AND SOIL
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2013
·Vol. 370
·期 1
·345-354
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IF 2.638
Wen Bei,Li Longfei,Liu Yu,Zhang Hongna,Hu Xiaoyu,Shan Xiao-quan,Zhang Shuzhen
Background and aims Perfluorinated compounds (PFCs) are of particular environmental concern. The migration of PFCs from soil to plants is a likely pathway for PFCs to enter the human food chain. This study aimed to investigate the uptake mechanisms of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) by maize ( Zea mays L. cv. TY2). Methods Hydroponic greenhouse experiments were performed. Results The kinetics of PFOS and PFOA uptake fitted Mechaelis-Menten equation well, suggesting their carrier-mediated influx processes. Uptake of PFOS was insensitive to metabolic inhibitors (NaN 3 and Na 3 VO 4 ). In contrast, treated with NaN 3 and Na 3 VO 4 reduced the uptake of PFOA by 83 and 43 % respectively. PFOS uptake was decreased by 31 % and 25 % when plants were treated with aquaporin inhibitors, AgNO 3 and glycerol, respectively, while aquaporin inhibitors had no effect on PFOA uptake. Anion channel blockers, 4, 4′-diisothiocyanostibene-2,2′-disolfonate (DID) and 5-nitro 2-(3-phenylpropylamine) benzoic acid (NPPB) inhibited the uptake of PFOS by 33 % and 30 %, respectively. Anion channel blocker anthracene-9-carboxylic acid (9-AC) decreased the uptake of PFOA by 28 %. No competitive uptake was found between PFOS and PFOA. Conclusions Uptake of PFOS and PFOA by maize may have different mechanisms.
研究领域:
环境科学
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植物生理学
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DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2021
·
IF 4.354
Yuxiu Li,Xiangqian Li,Xiaowei Li,Dayong Shi
The straightforward synthesis of α-fluoro-β-arylalkenyl sulfones under transition-metal- and base-free conditions has been described, which displays broad functional group compatibility and high stereoselectivity. In particular, the strategy is also applied to the late-stage modification of complex natural products and drugs.
研究领域:
有机化学
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药物化学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
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2016
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IF 2.758
Bing Xie,Qi Zhang,Haibo Zhang,Guangzu Zhang,Shiyong Qiu,Shenglin Jiang
Uniform morphology BaTiO 3 nanowires with high aspect ratio (>100) were synthesized via a novel stirring hydrothermal method . The BaTiO 3 /P(VDF-CTFE) nanocomposite films were prepared by a simple solution casting method using dopamine modified BaTiO 3 nanowires as nanofillers and ferroelectric polymer P(VDF-CTFE) as matrix. A maximum dielectric displacement of 9 μC/cm 2 under the electric field of 3000 kV/cm was achieved for the nanocomposites with 3 vol% BaTiO 3 nanowires. These nanocomposites with dopamine modified BaTiO 3 nanowires also exhibit an enhanced energy density of 8.4 J/cm 3 at a relative low electric field of 2700 kV/cm. This energy density is 55% higher than that of the pure P(VDF-CTFE) (−5.4 J/cm 3 at 3600 kV/cm). Such significant enhancement in dielectric displacement and energy density is attributed to the combined effects of both surface modification by dopamine and the high aspect ratio of the BaTiO 3 nanowires. Our study has a promising commercial potential in practical application in the automobile and aerospace field, which require greater energy density with a lower operating voltage.
研究领域:
材料科学
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能源存储
·
高分子材料
✓ 已验证
DOI
高影响因子
Nanomaterials
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2025
·Vol. 15
·期 8
·621
·
IF 4.3
Ruojiao Su,Miaomiao Wang,Yuwei Jiang,Shuang Zhang,Junjun Tan
Amorphous calcium phosphate (ACP), one of the most important calcium–phosphorus compounds, is widely used in dentistry, orthopedics, and medicine, but is rarely reported for fluoride removal from water. In view of this, sodium citrate-stabilized amorphous calcium phosphate (Cit-ACP) and Cit-ACP calcinated at different temperatures were successfully prepared for fluoride removal. The results showed that the adsorption data of the Cit-ACP sample could be well described by the Langmuir model, and the adsorption kinetic followed the pseudo-second-order model. The maximum adsorption capacity was 27.48 mg/g at pH 7.0 when the fluoride concentration is 100 mg/L. The thermodynamic parameters suggested that the adsorption of fluoride was a spontaneous endothermic process. The XRD, XPS, and Zeta potential analysis of the Cit-ACP sample before and after fluoride removal revealed that, owing to the core–shell structure of the Cit-ACP nanoparticles, the fluoride ions in solution and the calcium ions in shell layer of the Cit-ACP nanoparticles co-promoted the transformation of the core of the Cit-ACP nanoparticles into fluorapatite. Given the simplicity of its preparation and effectiveness of its fluoride removal properties, Cit-ACP would be a potentially economical, efficient, and biocompatible adsorbent for fluoride removal.
研究领域:
材料科学
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环境科学
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牙医学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Timur Meng,Enhui Wang,Yuyue Peng,Zhiyi Li,Hongliang Lei,Saowaluk Chaleawlert-umpon,Hongmin Su,Youzhi Wang,Lina Li
Sulfur hexafluoride (SF 6 ), a crucial gas in the power and semiconductor industries, presents significant challenges for recovery and separation. This work reports the synthesis of a series of porous organic polymers (POPs) with high porosity and physicochemical stability via a Lewis acid-catalyzed slow-knitting method. Different fluorinated organic monomers were employed, using dibromomethane (DBrM) as both solvent and electrophilic cross-linker. The resulting DBrM-knitted POPs exhibited BET surface areas up to 1,408.37 m 2 /g, surpassing those of chloroform-knitted POPs by 53.51 %-160.26 %. These materials demonstrated superior SF 6 adsorption capacity, tunable via the position of fluorine groups. The optimal material achieved an SF 6 adsorption capacity of 91 ml/g at 273 K and an SF 6 /N 2 separation selectivity of 195.70. An optimal pore size of 0.73 nm was identified for SF 6 adsorption and separation. These findings contribute significantly to the development of advanced porous materials for efficient SF 6 recovery.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
·
IF 3.131
Qilong Zhang,Zhicai Zhu,Da Shen,Hui Yang
This paper reports a feasible method to prepare pure organic polymeric nanocomposites with enhanced dielectric and hydrophobic performance. Homogeneous polystyrene (PS) microspheres with an average diameter of about 250 nm was firstly synthesized through emulsion polymerization. The blend film containing PS, PDMS and P(VDF-TrFE) are prepared by a simple solution-blending and spin-coating method. The blend film exhibits enhanced dielectric and hydrophobic properties. Typically, the dielectric constant of the blend film with 23 wt% PS reaches 21 at 100 Hz, which is 3 times that of PDMS/P(VDF-TrFE) (mass ratio: 2/3) due to enhanced interfacial polarization caused by PS addition. Meanwhile, the blend film with 23 wt% PS possesses a large apparent contact angle of 125° because the presence of a rough surface makes the solid-liquid contact surface larger than the apparently observed area, thus enhancing hydrophobicity. All the improved performances show great potential application for electrowetting devices.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2025
·
IF 9.8
Bin Du,Yinuo An,Liuqing Yang,Hanyi Li,Xianhua Huan,Yushun Zhao
This study presents the preparation of epoxy resin composites with fluorinated segment migration (FBEP) through the fluorination grafting modification of the epoxy resin matrix and optimization of the curing process to achieve effective regulation of surface resistivity. A stepwise curing procedure process was used to enhance the enrichment of fluorocarbon segments on the material surface, forming a fluorine-rich layer that regulates the distribution of traps. Experimental results show that as the pre-curing time is extended from 2 h to 10 h, the surface fluorine content increases from 3.8 wt% to 4.5 wt%, which leads to a decrease in surface resistivity from 4.243×10 15 to 1.346×10 15 Ω. Simultaneous measurements revealed a significant increase in the surface charge migration efficiency, with the surface potential decay amount after 22000 s increasing from 13.69% for FBEP-2 to 34.40% for FBEP-10. Moreover, the shallow charge trapping sites within the fluorine-rich layer effectively suppressed charge accumulation, causing the surface flashover voltage to rise from 21.13 to 27.70 kV, a 31.03% increase. The fluorinated segment directed migration strategy proposed in this study provides a novel solution for the coordinated enhancement of both surface resistivity and surface flashover voltage in epoxy resins.
研究领域:
材料科学
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高分子科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）