JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 22
·期 2
·581-590
·
IF 2.316
Liu Yi,Ma Xiaoyan,Sun Kun,Yang Kaiqi,Chen Fang
As a kind of organic–inorganic hybrid materials with nanocage structure, polyhedral oligomeric silsesquioxane (POSS) has the advantages of good interaction with polymer and excellent thermal and mechanical stability. Star-shaped polyhedral POSS-poly(methyl methacrylate) (POSS-(PMMA
n
) 8 ) with different molecular weights had been synthesized by sequential atom transfer radical polymerization (ATRP) with POSS-(C 3 H 6 Cl) 8 as the initiator. Electrospun polyvinylidene fluoride (PVDF) composite gel polymer electrolytes (GPEs) modified by POSS-(PMMA
n
) 8 were prepared, and their electrochemical and mechanical properties were assessed. The POSS-(PMMA
n
) 8 particles were found to improve thermal stability and mechanical strength of the GPEs without decreasing electrochemical properties. Among all composite GPEs studied, the best comprehensive performance was obtained from PVDF-[POSS-(PMMA 46 ) 8 ] GPE: the porosity was 60.0%, and the tensile strength and the elongation at break were 4.94 MPa and 52.2%, respectively. Besides, the ionic conductivity was 4.85 × 10 −3 S cm −1 at room temperature, the electrochemical window could reach 6.0 V, and the interfacial impedance with Li electrode was 256.15 Ω. The cells with POSS-(PMMA) 8 -modified composite electrolytes also have good cycle performance. These results suggest that the PVDF-[POSS-(PMMA) 8 ] composite GPEs are suitable for lithium-ion battery applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Donglin Jiang,Yuanyuan Xie,Zezhi Chen,Huijuan Gong,Huiqiang Yu,Lu Chen
Zeolitic Imidazolate Framework-8 (ZIF-8) shows potential as a carbonic anhydrase-mimicking catalyst for enhancing carbon dioxide (CO 2 ) absorption in industrial decarbonization solvents. This study synthesized ZIF-8 with high Brunauer-Emmett-Teller (BET) specific areas and their dopamine-modified hydrophilic derivatives (ZIF-8-DA) via a one-step method, aiming to maximize ZIF-8’s catalytic performance in CO₂ hydration. Both ZIF-8 and ZIF-8-DA effectively promoted CO₂ absorption in water and alkaline solvents, with excellent stability and reusability. Among them, ZIF-8-DA (220) exhibited the highest catalytic activity, achieving absorption enhancement efficiencies of 95.54% in water, 35.26% in diethanolamine (DEA) solution, and 18.42% in potassium carbonate (K₂CO₃) solution. Compared with ZIF-8, ZIF-8-DA showed better water dispersibility-a key to its higher activity. Dopamine modification significantly improved the hydrophilicity of ZIF-8, enabling stronger interactions with CO₂ in the aqueous phase and facilitating nucleophilic attack on CO₂. Importantly, the modification preserved ZIF-8’s structure, ensuring reusability across multiple absorption cycles. This research underscores that ZIF-8-DA with high BET specific area holds substantial potential as an efficient and durable carbonic anhydrase- mimicking catalyst for industrial CO₂ capture.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Chen Wang,Chenyang Zhao,Yue Li,Jie Liu,Di Cheng,Tao Shen,Ji Zhang,Qianhong Shen,Hui Yang
The spatial distribution of functional nanofillers in anticorrosion coatings significantly influences their ability to seal micropores/cracks and enhance self-healing properties. In this study, a novel dual-responsive nanocontainer loaded with the corrosion inhibitor benzotriazole (BTA) was developed for active corrosion protection in waterborne epoxy coatings. The magnetic nanocontainers (Fe 3 O 4 @BTA-ZIF-8) were synthesized via the in-situ growth of BTA-encapsulated zeolitic imidazolate frameworks-8 (ZIF-8) on the surface of anion-modified Fe 3 O 4 nanoparticles. This unique structure endows the nanocontainers with pH responsiveness for controlled BTA release under corrosive conditions. Additionally, under an external magnetic field, the nanocontainers migrate toward the coating/metal interface, increasing the local inhibitor concentration and improving corrosion resistance. Potentiodynamic polarization tests revealed that the nanocontainers achieved an inhibition efficiency of 82.40 % on carbon steel surface after 24 h of saline immersion. Cross-sectional analysis of the composite coatings confirmed the magnetic-field-induced accumulation of nanocontainers at the coating/substrate interface, facilitating rapid and efficient inhibitor release. Electrochemical impedance spectroscopy results further revealed a low frequency impedance value (|Z| 0.01 Hz ) of 1.42 × 10 10 Ω·cm 2 for epoxy coating containing magnetically distributed Fe 3 O 4 @BTA-ZIF-8 nanocontainers after 35 d of saline immersion, over an order of magnitude higher than that of coating without magnetic modulation. Furthermore, the scratched composite coating after magnetic modulation exhibited an improvement efficiency (η) of 165.04 % after 6 h of immersion, compared to only 22.76 % for the non-modulated counterpart. These results confirm the long-term protective performance of Fe 3 O 4 @BTA-ZIF-8 within epoxy coatings under magnetic modulation. This study is the first to introduce a magnetic MOF-based nanomaterial for corrosion protection, demonstrating the potential of epoxy coatings with magnetically directed distribution and pH-responsive inhibitor release.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Jingying Yang,Mingfei Pan,Xiao Yang,Kaixin Liu,Yang Song,Shuo Wang
In-situ, real-time and sensitive detection of multiple pesticide residues in food is always an important issue in food safety. Herein, a novel multifunctional bead-string like Ag nanowires@zeolitic imidazolate framework-8 (Ag NW@ZIF-8) core–shell nanochains was successfully synthesized and utilized as surface-enhanced Raman scattering (SERS) substrate for in-situ and simultaneous detection of pesticide residues . Due to the microporous framework structure of ZIF-8 shell and the plasmon property of Ag NWs core, the Ag NWs@ZIF-8 composite was demonstrated to have strong adsorption performance and high SERS activity (enhancement factor: 4.6 × 10 7 ). The Ag NWs@ZIF-8 based SERS strategy achieved sensitive detection of two water-insoluble pesticides methylparathion and carbaryl with detection limits as low as 7.6 × 10 −9 M and 5.7 × 10 −9 M, as well as the in-situ detection of multi-pesticide residues on fruits and vegetables with acceptable recovery ranged from 77.4 % to 117.5 %, demonstrating its great potential for in-situ and rapid detection of food contaminants.
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CHEMOSPHERE
·
2022
·
IF 8.943
Mu Li,Jingwen Luo,Jianjiang Lu,Wentao Shang,Jiale Mu,Feiyun Sun,Zijun Dong,Xiaoyan Li
A novel Polyacrylonitrile (PAN) composite membrane involving ZIF-8 nanoparticles , named as ZIF-8/PAN membrane, was obtained via electrospinning to remove the Congo red (CR), Pb(II) and Cu(II) ions in industrial wastewaters , during which the adsorption mechanisms were examined in this study. The adsorption efficiency of the electrospun ZIF-8/PAN membrane was as high as 89%, 92% and 76% for CR, Pb(II) and Cu(II), respectively. Comparative analysis showed that ZIF-8 nanoparticles embedded in the ZIF-8/PAN membrane accounted for these enhanced adsorption capabilities. The adsorption behaviors of the ZIF-8 nanoparticles were investigated through experiments and theoretical analysis, and the results unraveled that the adsorption for CR by the ZIF-8 was mainly including electrostatic interaction, hydrogen bonding and π − π interaction, while those for Pb(II) and Cu(II) were mainly caused by ion-exchange and chemical adsorption. Parametric studies were conducted to optimize the conditions for removing CR, Pb(II), and Cu(II) by ZIF-8 nanoparticles, during which all of pollutants showed different reactions to the solution pH. This work not only develops a novel ZIF-8/PAN composite membrane for effective removals of pollutants, but also reveals the underlying mechanisms of pollutants adsorption in terms of molecular interactions, providing important understandings on fibrous materials design for efficient heavy metals and dyes removals in industrial wastewater treatment .
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yun Deng,Jiankun Huang,Xingwen Lu,Da Chen,Fei Wang
Due to the limited documentation on thermal treatment of per - and polyfluoroalkyl substances (PFAS), this study investigated the thermal degradation behavior, mechanisms, mineralization, and gaseous product toxicity of five environmentally ubiquitous PFAS, including perfluorooctanesulfonic acid (PFOS), perfluorooctane sulfonamide (PFOSA), 6:2 chlorinated polyfluoroalkyl ether sulfonate (F 53B), perfluorooctanoic acid (PFOA), and 1H,1H,2H,2H-perfluoro-1-decanol (8:2 FTOH). Results showed that thermal stability of PFAS is dictated by their functional groups, presenting a stability hierarchy of sulfonic acid (PFOS, F 53B) > sulfonamide (PFOSA) > carboxylic acid (PFOA) > hydroxyl (8:2 FTOH). Thermal decomposition of these PFAS was initiated with cleavage of bonds connecting the functional group to the perfluorinated chain followed by stepwise chain-shortening reactions, yielding various perfluoroalkanes, perfluoroalkenes, and hydrofluoroalkanes. Calcium hydroxide remarkably enhanced fluorine mineralization into calcium fluoride and suppressed the formation of organofluorinated compounds during PFAS thermal treatment. Toxicity predictions indicated reduced acute toxicity for thermal degradation products compared to parent PFAS, but they still pose potential risks to human health. This implies that optimizing thermal treatment conditions is essential, focusing not only on mineralization efficiency but also on suppressing the formation of harmful by-products. These findings provide a systematic understanding of PFAS thermal decomposition and identify potentially hazardous gaseous by-products.
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RSC Advances
·
2014
·Vol. 4
·期 32
·16612-16617
·
IF 3.708
Keli Zhong,Xue Zhou,Ruibin Hou,Pei Zhou,Shuhua Hou,Yanjiang Bian,Gang Zhang,Lijun Tang,Xiaohong Shang
A water-soluble fluorescent sensor (L) based on 2-(2-(8-hydroxyquinolin)-yl)benzimidazole has been synthesized and characterized. Sensor L displays highly selective and sensitive recognition of Hg2+ with a fluorescence “ON–OFF” response in buffered aqueous solution (1% dimethyl sulfoxide (DMSO), Tris–HCl 10 mM, pH = 7.4). X-ray crystal structure of the L–Hg2+ complex reveals that the oxygen and nitrogen atoms of 8-hydroxyquinoline and the imine N atom of the benzimidazole unit (N1) bind Hg2+ through a 1 : 1 binding stoichiometry. The fluorescence quenching mechanism is qualitatively evaluated by quantum chemical calculations which show that the fluorescence quenching phenomenon is caused by ligand-to-metal charge transfer (LMCT) in the excited state.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Fang Feng,Kai Li,Gang Wen,Ying Liu,Jiawei Hui,Tinglin Huang
Loose nanofiltration (LNF) offers a promising solution for producing high-quality drinking water by selectively removing natural organic matter (NOM) while permeating beneficial minerals. Herein, we presented a molecular design strategy to fabricate a novel polyamide-polyester LNF membrane via interfacial polymerization (IP) of trimesoyl chloride (TMC) and an aqueous monomer, 8-amino-1-naphthol-3,6-disulfonic acid (ANDSA). Mechanistically, the steric hindrance of the bulky naphthalene skeleton prevents tight polymer chain packing, inherently creating a loose separation structure. The optimized ANDSA-0.5 membrane achieved a high water permeability of 62.4 L·m −2 ·h −1 ·bar −1 and excellent rejection (>90%) for both humic acid (HA) and tannic acid (TA), while maintaining low salt rejection (<13.0%) for various inorganic salts (Na 2 SO 4 , MgSO 4 , MgCl 2 , CaCl 2 , and NaCl). Furthermore, the membrane exhibited superior antifouling performance, with a flux recovery ratio (FRR) of 84.1% after three filtration-cleaning cycles using HA/CaCl 2 foulants, significantly outperforming the piperazine (PIP) control membrane (73.5%). Moreover, the membrane exhibited a low irreversible fouling tendency, enabling sustained operational performance through simple hydraulic cleaning cycles. Compared to the commercial NF270 membrane, the ANDSA-0.5 membrane achieved an approximately 5-fold higher water permeability, along with enhanced antifouling properties and superior NOM/mineral ions selectivity, offering a novel strategy for fabricating high-performance LNF membranes.
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CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Wei Yang,Ximing Zheng,Mingli Cao
Spent adsorbents often contain harmful substances, which may have an impact on the ecological environment if these substances enter the environment. This study mainly introduces a safe treatment method for solid waste formed after heavy metal ions are adsorbed by an efficient adsorbent, ZIF-8@GO-COOH. This work mainly discusses the impact of solidifying the spent adsorbent in the cement system on the cement mechanical properties and hydration process. The experimental results showed that when the dosage of the spent adsorbent was 0.01%, 0.02%, 0.03%, and 0.04%, respectively, the compressive strength of 28 d was increased by 4.24%, 6.16%, 7.19%, and 8.87%, respectively, compared with the cement without spent adsorbent. Introducing spent ZIF-8@GO-COOH in the cement production process does not have a negative impact on the cement mechanical properties, and can refine the cement pore structure and dense microstructure, thereby improving the compressive strength. The Toxicity Characteristic Leaching Procedure (TCLP) results showed that solidifying the spent adsorbent with cement can effectively reduce the leaching of heavy metal ions in the spent adsorbent. This study solidifies the spent ZIF-8@GO-COOH nanoadsorbent material into the cement system as a sustainable alternative to landfilling. This treatment method has certain economic benefits and safety, and has some reference significance for promoting the development and improvement of spent adsorbents and improving their safe treatment and reuse.
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BIOORGANIC CHEMISTRY
·
2023
·
IF 5.1
Zean Zhao,Jian Luo,Hui Liao,Fengxin Zheng,Xinhua Chen,Jiajun Luo,Yongjun Chen,Kunlu Zhao,Shuqin Zhang,Jinhong Tian,Ting Wu,Yongmei Li,Lu Li,Yang Yang,Cuiting Lin,Qun Zhang,Yuanxin Tian,Jianxin Pang
Previously we discovered a novel natural scaffold compound, isobavachin (4′, 7-dihydroxy-8-prenylflavanone), as a potent URAT1 inhibitor by shape and structure based on a virtue screening approach. In this study, further urate-lowering mechanism, pharmacokinetics and toxicities of isobavachin were conducted. Isobavachin inhibited URAT1 with an IC 50 value of 0.24 ± 0.06 μM, and residues S35, F365, I481 and R477 of URAT1 contributed to high affinity for isobavachin. Isobavachin also inhibited glucose transporter 9 (GLUT9), another pivotal urate reabsorption transporter, with an IC 50 value of 1.12 ± 0.26 μM. Molecular docking and MMGBSA results indicated that isobavachin might compete residues R171, L75 and N333 with uric acid, which leads to inhibition of uric acid transport of GLUT9. Isobavachin weakly inhibited urate secretion transporters OAT1 with an IC 50 value of 4.38 ± 1.27 μM, OAT3 with an IC 50 of 3.64 ± 0.62 μM, and ABCG2 with an IC 50 of 10.45 ± 2.17 μM. Isobavachin also inhibited xanthine oxidase (XOD) activity in vitro with an IC 50 value of 14.43 ± 3.56 μM, and inhibited the hepatic XOD activities at 5–20 mg/kg in vivo . Docking and MMGBSA analysis indicated that isobavachin might bind to the Mo-Pt catalyze center of XOD, which leads to inhibition of uric acid production. In vivo , isobavachin exhibited powerful urate-lowering and uricosuric effects at 5–20 mg/kg compared with the positive drugs morin (20 mg/kg) and RDEA3170 (10 mg/kg). Safety assessments revealed that isobavachin was safe and had no obvious toxicities. Isobavachin has little cell toxicity in HK2 cells as indicated by the MTT assay. In vivo, after treatment with 50 mg/kg isobavachin for 14 days, isobavachin had little renal toxicity, as revealed by serum CR/BUN levels, and no hepatotoxicity as revealed by ALT/AST levels. Further HE examination also suggests that isobavachin has no obvious kidney/liver damage. A pharmacokinetic study in SD rats indicated isobavachin had lower bioavailability (12.84 ± 5.13 %) but long half-time (7.04 ± 2.68 h) to maintain a continuous plasma concentration. Collectively, these results indicate that isobavachin deserves further investigation as a candidate anti-hyperuricemic drug with a novel mechanism of action: selective urate reabsorption inhibitor (URAT1/GLUT9) with a moderate inhibitory effect on XOD.
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PubMed
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Pengfei Zhu,Xiaolong Wu,Xingyang Xiao,Ming Duan,Dan Luo,Jinru Lin
In this work, Bi 12 O 17 Cl 2 and ZIF-8 were synthesized via a facile in-situ precipitation method, while ZnO-CN was obtained through the pyrolysis of ZIF-8. Then, a novel Bi 12 O 17 Cl 2 /ZnO-CN composite catalyst with Z-scheme heterojunction was prepared by mechanical mixing-low temperature activation method. When the ZnO-CN is pyrolyzed at 550 ℃ and accounts for 10 wt% in the Bi 12 O 17 Cl 2 /ZnO-CN composite, the composite exhibited a significantly higher degradation rate for levofloxacin hydrochloride (LVX) (94.50%) compared to Bi 12 O 17 Cl 2 (67.30%) and ZnO-CN (36.80%), while also achieving a high removal rate of Cr(VI) under acidic conditions (92.00%). And the toxicity of LVX to wheat decreased significantly after photocatalytic degradation. Meanwhile, the Bi 12 O 17 Cl 2 /ZnO-CN has good universality, salt resistance and reuse stability. The experimental results of sample characterization show that the improved photocatalytic performance of Bi 12 O 17 Cl 2 /ZnO-CN composite can be attributed to the high-efficiency separation of electron-hole pairs (e - -h + ), enhanced light absorption in the visible region, increased specific surface area and active sites. Both the free radical capture experiment and electron paramagnetic resonance (EPR) test indicate that •O 2 - and h + are the primary active species in the process of degrading LVX by Bi 12 O 17 Cl 2 /ZnO-CN. Combined with mechanism exploration experiment and iquid chromatography-mass spectrometry (LC-MS) analysis, a possible direct Z-scheme heterojunction electron transfer mechanism and photocatalytic degradation pathways for LVX was proposed. This work enhances the photocatalytic performance of Bi 12 O 17 Cl 2 and provides an idea for antibiotic or Cr(VI) wastewater treatment.
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IMMUNOLOGICAL INVESTIGATIONS
·
2023
·
IF 2.8
Dongdong Dou,Meirong Bi,Xiuyun Li,Nan Zhang,Mi Xu,Aili Guo,Feng Li,Weiwei Zhu
Background Childhood asthma is a major global health concern. ADP-ribosylation factor 6 (ARF6) is a low-molecular-weight GTPase; however, its role in childhood asthma remains unclear.Methods Ovalbumin (OVA)-challenged neonatal mice and transforming growth factor-β1 (TGF-β1)-induced BEAS-2B cells were used as in vivo and in vitro models of childhood asthma, respectively.Results Upon OVA stimulation, ARF6 expression was upregulated in the lung tissue. Neonatal mice administered SehinH3 (an ARF6 inhibitor) exhibited improved pulmonary pathological injury, along with reduced inflammatory cell infiltration in the lungs and cytokine release in bronchial alveolar lavage fluid and serum (interleukin [IL]−3, IL−5, IL−13, IgE, and OVA-specific IgE). SehinH3 treatment restrained epithelial – mesenchymal transition (EMT) in the lungs of asthmatic mice, as evidenced by increased E-cadherin and decreased N-cadherin and α-smooth muscle actin expression. Different TGF-β1 exposures to BEAS-2B cells induced a time- and dose-dependent increase in ARF6 expression in vitro. Upon TGF-β1 stimulation, ARF6 knockdown repressed EMT and SehinH3 treatment caused similar results in BEAS-2B cells. The transcription factor E2F8 is involved in diverse biological functions and its increased expression was confirmed in vivo and in vitro. Dual-luciferase assays confirmed that E2F8 binds to the ARF6 promoter and promotes its transcriptional activity. In vitro results revealed that E2F8 silencing suppressed EMT, whereas rescue experiments showed that ARF6 overexpression partly reversed these phenomena.Conclusion Our study showed that ARF6 is associated with childhood asthma progression and may be positively regulated by E2F8. These results provide insight into the pathogenesis and treatment of childhood asthma.
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PubMed
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