ENVIRONMENTAL POLLUTION
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2025
·
IF 7.3
Tingting Cai,Sijia Liu,Dehua Zeng,Zhiyu Zhang,Jingyi Gu,Yi Liang,Chen Yang
Tire wear particles (TWPs) were one of the major pollutants of atmospheric particulate matter, which were carriers of environmentally persistent free radicals (EPFRs), thus emerging as an incipient ecological threat. The levels of atmospheric humidity and ozone varied in different regions, which led to differences in the generation and accumulation of EPFRs. EPFRs on TWPs altered during atmospheric photooxidation, yet the effects of key environmental parameters remained poorly understood. This study systematically investigated the evolution of EPFRs on TWPs under ultraviolet irradiation with controlled relative humidity and ozone exposure. EPFRs were detected on original TWPs, which originated from polymers, and carbon black prolonged the lifespan of EPFRs. Electron Paramagnetic Resonance (EPR) analysis demonstrated humidity-dependent EPFRs accumulation dynamics. Under low relative humidity, sustained photon absorption promoted polymer chain excitation, driving EPFRs accumulation ( p < 0.01) through the induction of photooxidation chain reactions. Under high humidity, light scattering effect of water molecules reduced the accumulation of EPFRs ( p < 0.05) and retarded the photooxidation process of TWPs. During photooxidation in ozone, ozone concentration significantly affected the accumulation and evolution of EPFRs. Photoaging in an ozone atmosphere led to a rapid accumulation of EPFRs ( p < 0.01), which was positively correlated with ozone concentration. The formation and accumulation of EPFRs in the ozone atmosphere resulted not only from the photooxidation chain reaction of polymers but also from the Norrish reactions of the ozonation products under photon excitation. These findings emphasized the key roles of atmospheric relative humidity and ozone in regulating the evolution of EPFRs during the photooxidation of TWPs. This provided fundamental knowledge for predicting the EPFRs carried by TWPs in areas with different meteorological conditions and ozone pollution levels. Future air quality assessments should consider photooxidation processes of TWPs under actual atmospheric parameters and atmospheric pollutant concentrations to better assess ecological risks of atmospheric particulate matter.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Qi Zhang,Wenxuan Li,Jianzhe Ma,Caihong Xue,Guijun Yang,Hongmin Wang,Hui Nan,Heqi Li
Waterborne epoxy resin coatings are extensively utilized in the corrosion protection of metal materials, primarily due to the excellent environmental protection capabilities. However, their hydrophilicity often limits their corrosion resistance. In order to improve the corrosion resistance of waterborne epoxy resin coatings, Zn 2+ and Mn 2+ double cations were introduced into waterborne epoxy resin in this paper to prepared the P-E-Zn/Mn composite coating with the high crosslinking density. The article systematically studied the corrosion resistance of waterborne composite coatings doped with dual cations (Zn 2+ /Mn 2+ ) and single cations (Zn 2+ or Mn 2+ ), and compares the actual situations of waterborne composite coatings under two doping conditions in salt spray tests and acid corrosion experiments. DFT calculation revealed the corrosion resistance mechanism of Zn 2+ /Mn 2+ double cation doping in waterborne epoxy resin. The experimental results showed that the corrosion resistance of P-E-Zn/Mn composite coating doped with dual cations (Zn 2+ /Mn 2+ ) is superior to that of pure waterborne epoxy resin coating and single doped (Zn 2+ or Mn 2+ ) waterborne epoxy resin coating. DFT calculations demonstrated that the adsorption effect between double cations (Zn 2+ /Mn 2+ ) with PVA and waterborne epoxy resin molecules promoted the formation of O-Zn-O and O-Mn-O bonds, thereby enhancing the curing crosslinking reaction of the P-E-Zn/Mn waterborne epoxy resin coatings. The complex cross-linking structure of O-Zn-O and O-Mn-O in P-E-Zn/Mn coating enhanced corrosion resistance and also improved resistance in acidic environments.
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高影响因子
Future Foods
·
2025
·
IF 8.2
Jiaojiao Liang,Xinyu Shen,Ziyou Liu,Yixin Hu,Hui Xu,Zimeng Yang,Fei Xie,Jinping Cao,Yue Wang,Chongde Sun
In this study, air nanobubbles (NBs) generated with a new device were stabilised by a complex of arabic gum (AG) and stevioside (STE). Some basic metrics of NBs produced by biosurfactants at different concentrations were characterized to determine the stability of NBs. The mixture solution rich in NBs was assisted by ultrasonic disruption (UD) to extract total phenols (TP) and total flavonoids (TF) from 7 citrus pericarp. We evaluated four key factors affecting the TF extraction of ‘ Citrus reticulata 'Chachiensis '’ (‘Chazhigan’) pericarp by one-way test. The optimal extraction conditions were further predicted and validated by Box-Behnken response surface experiments. Under the conditions of 135 w capacity, 4.1 C mixture solution concentration, 30.5°C water bath temperature, and 31min ultrasonic time, the TF content of ‘Chazhigan’ pericarp (20.82±0.85 mg/g DW) was significantly better than that extracted by 80% ethanol (12.22±0.90 mg/g DW). Finally, fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were utilised to provide a preliminary exploration of the potential mechanisms involved in the extraction process. The flavonoid extracts from the pericarp of ‘Chazhigan’ were qualitatively analysed. And the differences in the chemical antioxidant activity of their extracts were investigated before and after the application of traditional alcoholic extraction and novel green extraction. In conclusion, this study established a novel approach that is eco-friendly, which could effectively extract flavonoids from citrus peels.
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高影响因子
Fermentation-Basel
·
2025
·Vol. 11
·期 11
·609
·
IF 3.3
Run Huang,Ying-Ying Xie,Xin-Yu Liu,Huai-Hui Yi,Hao-Jie Xu,Liang Zhang,Hui-Mei Cai,Zheng-Quan Liu,Da-Xiang Li,Yun-Qiu Yang,Xiao-Chun Wan,Chuan-Yi Peng
Brick tea is a type of post-fermented food that involves microorganisms. Long-term consumption of brick tea exposes consumers to high fluoride levels, which can adversely affect their health. This study explored the feasibility of selective defluorination of Qingzhuan brick tea through membrane separation technology, and pilot production was conducted to produce defluorinated instant brick tea. The concentration of tea polyphenols increased by more than 10 times after nanofiltration, demonstrating the high selectivity of nanofiltration membranes toward fluoride. Defluorination trends were studied at different initial material concentrations (0.5–4%) and operating pressures (0.1–0.5 MPa) under cyclic defluorination. Defluorinated instant brick tea products were also industrially prepared using 300- (DF-300) and 1000-Da (DF-1000) membranes, followed by vacuum freeze-drying. The DF-1000 and DF-300 products exhibited a defluorination rate of 51.46% and 67.96%, respectively. The products have excellent characteristics in terms of color, aroma, and flavor quality, as well as solubility. Gas chromatography–mass spectrometry indicated that the volatile components in the defluorinated instant brick tea were slightly different from those in the original tea, but the key aroma and flavor characteristics of the defluorinated brick tea remained unchanged. Membrane separation provides technical support for the large-scale production of low-fluoride post-fermented tea.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 30
·1-21
·
IF 2.8
Yang Minjie,Zou Congyang,Ji Yufeng,Liu Ruijie,Xu Ying
A novel MIL-101(Fe)/Bi₂S₃ Z-scheme heterojunction with a metal–organic framework (MOF) structure was synthesized via a solvothermal method. Compared with pristine MIL-101(Fe) and pristine Bi₂S₃, this composite exhibits a significant breakthrough in degradation performance toward rhodamine B (RhB) and tetracycline hydrochloride (TCH). Specifically, it achieves a degradation efficiency of 95.7% for 20 mg/L TCH within 120 min and 98.6% for 40 mg/L RhB within 90 min.Characterizations including X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), and electrochemical impedance spectroscopy (EIS) confirm that the MOF structure of MIL-101(Fe) provides a stable support matrix for Bi₂S₃. Moreover, the construction of the Z-scheme heterojunction can effectively suppress the recombination of photogenerated electron–hole pairs while retaining the strongly oxidizing hydroxyl radicals (・OH) and strongly reducing superoxide radicals (・O₂⁻). More importantly, after five recycling cycles, the degradation efficiencies of the composite for TCH and RhB remain at 86.8% and 88.6%, respectively, with no obvious damage to its crystal structure after cycling. This demonstrates superior structural stability and reusability compared to most reported MOF-based photo-Fenton catalysts.
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高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Jianfeng Hu,Huiya Cheng
A challenge in metal protection is developing anti-corrosion materials that possess both high adsorption capacity and intelligent responsiveness. To overcome the limitations of traditional corrosion inhibitors, a novel pH-responsive corrosion inhibitor (PDT@ZIF-90) was developed through a multi-step strategy. Specifically, the catechol-modified polymer–TiO2 hybrid (PDT) was synthesized through Schiff base reactions, which demonstrated dense adsorption on Q235 carbon steel through Fe–N/O coordination. Subsequent ZIF-90-mediated in situ encapsulation enabled precise payload integration of the PDT corrosion inhibitor. UV-vis characterization confirmed that the PDT@ZIF-90 composite system enables pH-triggered intelligent release of the active corrosion inhibitor component under acidic conditions (pH < 6). Electrochemical tests revealed a 95.2% inhibition efficiency for 200 ppm PDT@ZIF-90 in 3.5 wt% NaCl. This dual-functional strategy offers a scalable paradigm for self-adaptive anticorrosion materials suitable for Q235 carbon steel in marine and energy infrastructure applications.
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高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Ming Huang,Shunyan Ning,Juan Liu,Lifeng Chen,Mohammed F. Hamza,Yuezhou Wei
Ultra-high purity La2O3 (≥6 N, 99.9999%) with extremely low impurity elements is widely used in advanced optical and electrical fields and usually requires a complex purification process. In this study, a phosphonic acid functional resin (HEHEHP + TBP)/SiO2–P is prepared for the efficient removal of key impurity elements such as rare earth impurities, Fe, Th and U from La in a nitric acid medium. Batch experiments showed that in HNO3 solutions of pH ≥ 2, the removal efficiency of impurity ions by this resin was greater than 97%. The optimal separation factors (SFCe/La, SFPr/La, and SFNd/La) between light rare earths reached 7.55, 19.5, and 19.2, respectively. Advanced characterization confirmed the ion exchange and coordination mechanisms, involving the participation of the P–OH and PO groups. DFT calculations corroborated the higher affinity of the resin for U and heavy rare earth over light rare earth impurities. A process for the preparation of ultra-high purity La2O3 was proposed and verified by a continuous single column, achieving a purity increase from 99.995% to over 99.9999% with a purification ability of 180 mg La per g of resin and Th and U less than 0.05 ppm. It is worth noting that when the feed solution is only processed through a column filled with (HEHEHP + TBP)/SiO2–P (during the non-desorption step), a purified La(III) solution can be directly obtained, effectively adsorbing trace impurities. This process does not require the introduction of desorption agents, which reduces the economic cost. Compared with the multi-stage sequential purification method, it improves the production efficiency.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Xueting Li,Lin Wang,Yuanhui Tang,Huanhuan Wu,Lixin Yu,Xiaolin Wang,Yakai Lin
The safety and efficacy of low molecular weight dextran (LMWD) in pharmaceutical applications critically depend on the uniformity of its molecular weight distribution. In this study, a novel ultrafiltration (UF) modified membrane was prepared by UV-induced surface graft polymerization on the commercial polysulfone (PSf) membrane for the efficient separation of LMWD. Benzophenone (BP) was employed as the photoinitiator to initiate the grafting polymerization of the difunctional monomer divinylbenzene (DVB). During the polymerization process, DVB underwent both chain homopolymerization and intermolecular crosslinking, forming a dense three-dimensional network that significantly reduced the membrane pore size and enhanced its separation selectivity. The optimized PSf-g-DVB membrane, prepared with a concentration of 2 wt% DVB and 1 wt% BP, achieved over 85% rejection of 20 kDa dextran, while the rejection rate for 2 kDa dextran was only 0.2%, with a water permeance of 5.4 L·m -2 ·h -1 ·bar -1 . Furthermore, the membrane demonstrated excellent stability, maintaining a rejection difference of 70% between the two different molecular weights of dextrans after 48 hours of continuous filtration. In filtration experiments with mixed dextran solutions, the PSf-g-DVB membrane exhibited a separation factor as high as 11.5, nearly 9 times higher than that of the commercial PSf membrane, further confirming the feasibility of UV-grafted membrane modification for the selective sieving of LMWD, and offering a green and effective approach for pharmaceutical-grade dextran purification.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xun Xu,Xiaojie Ji,Yuankang Bao,Luliang Liao,Ping Li,Hao Zhang,Yaqiang Xie,Shuwang Duo
The efficiency of peroxymonosulfate (PMS)-based advanced oxidation processes for eliminating persistent organic pollutants is significantly limited by high residual contaminant levels and complex aqueous matrices. Developing robust and environmentally benign catalysts that can activate PMS while resisting matrix interference is therefore critical for practical wastewater treatment. Herein, we present a porous Co Mn bimetallic oxide (p-Co 1.2 Mn 1.8 O 4 ) integrating dual-metal active sites with mesoporous nanoconfinement, which simultaneously enhances PMS adsorption energy and enriches interfacial pollutant concentration. A direct electron transfer process (ETP) was enabled between the tetracycline (TC) pollutant (as an electron donor) and surface-bound PMS complexes (PMS ⁎ , as an electron acceptor) on p-Co 1.2 Mn 1.8 O 4 . This synergy enables a novelty nonradical electron-transfer pathway (ETP) between tetracycline (electron donor) and surface-bound PMS complexes (PMS ⁎ , electron acceptor), achieved nearly 100 % removal of TC within 15 min and increasing the pseudo-first-order constant from 0.121 to 0.348 min −1 over the non-porous sample. The p-Co 1.2 Mn 1.8 O 4 /PMS system also efficiently degrades binary pollutants and maintains high activity under varied pH, temperature, and complex matrices. This work provides mechanistic insights into how multi-scale structural synergy—at both atomic and nanoscale levels—in bimetallic oxide catalysts regulates PMS activation, offering a promising platform for practical water purification.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Zhenhua Ji,Shijing Xie,Hao Chen,Peng Zhang,Ding Luo,Yixuan Chai,Zhuo Wang
Aiming at the key issues of current vehicle Ammonia Slip Catalyst (ASC) catalysts, such as poor low-temperature activity, high noble metal content, and narrow operating window, this study aims to construct multi-scale pore structures in Al 2 O 3 supports of supported catalysts to regulate selective catalytic oxidation of NH 3 (NH 3 -SCO) across broad temperature ranges and space velocities by improving convective diffusion, conduction, migration, and adsorption processes within catalyst voids. Characterization results show that a series of catalyst supports with different pore structures was successfully prepared using different templates. Pt was loaded using an optimized supported catalyst preparation method. Meanwhile, the coating amount of the prepared catalyst on cordierite monolith substrates was significantly reduced, and NH 3 -SCO performance tests were conducted. The results indicate that single mesoporous structures have limited regulation on the intrinsic activity of catalysts, while macroporous structures enhance the influence of desorption and void diffusion of gas-phase reactants and products on catalytic reactions. In the presence of macroporous structures, the promotional effect of mesopores on NH 3 -SCO reactions is enhanced. Among all catalysts, hierarchical porous catalysts with larger pore diameters and better interconnected pore structures exhibit NH₃ conversion rates exceeding 99 % across the full temperature range of 200℃ - 500℃, with NH 3 concentrations below the regulatory limit of 10 ppm throughout the operating window. Macroporous structures and their pore diameters play a dominant role in regulating NH 3 -SCO reactions, particularly with stronger regulation at low temperatures. Increasing space velocity enhances the diffusion rate of NH 3 gas molecules while amplifying the influence of pore structure regulation on catalysts. Notably, compared with traditional Pt/Al 2 O 3 , pore structure regulation does not significantly increase the generation of N 2 O while effectively enhancing the catalytic activity of the ASC catalyst.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhiqiang Zhao,Yiwen Huang,Minghao Chao,Silin Du,Junjie Li,Jin Wang,Guangyu Ma,Yufan Liu,Xin Kang,Mengying Fu,Dehong Yu,Shibao Li,Fenglei Gao
Oxygen defect engineering, which precisely modulates the coordination environments and dynamic equilibria of oxygen vacancies (O v ), lattice oxygen (O lat ), and adsorbed oxygen (O ads ), serves as a pivotal strategy for optimizing electronic structures and catalytic pathways in metal oxides and is expected to become a core means to enhance the activity of nanoenzymes. Leveraging optimized component ratios from oxygen defect engineering, we engineered hollow porous nanocages with a distinctive 3D open framework to maximize active site exposure. Controlled reduction reconstructed oxygen species distribution, endowing the material with exceptional peroxidase (POD), oxidase (OXD), and laccase (LAC) activities. Capitalizing on phenolic pollutants' structural features and reducibility, we developed a tri-channel nanozyme sensor array using CuO@Pd nanocages. This system enables efficient oxidative degradation and precise identification of six phenolic compounds through synergistic triple-enzyme catalysis. Transcending the pH limitations of conventional sensors, the array differentiates phenolic analogues across concentrations with broad linear ranges and high sensitivity. This work establishes a direct methodology for modulating nanozyme activity via oxygen defect engineering while elucidating the electron-transfer mechanism in Pd Cu redox cycling.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Ruixue Sun,Lubin Hua,Qingqing Jia,Xiaojing Kang,Lianpeng Lv,Yichang Li,Hui Si,Chao Zhang,Hailiang Yang,Yang Zhou,Bing Wang
Ancient leather artifacts provide critical insights into prehistoric and historic clothing and leatherworking techniques. However, their accurate detection and species identification remain challenging due to material degradation and environmental contamination. In this study, a high-performance photoelectrochemical (PEC) immunosensor was developed based on MoS₂/NiCo₂O₄-Ag@CoFe₂O₄ nanocomposites for the highly sensitive and specific analysis of archaeological leather. The immunosensor leverages a MoS₂/NiCo₂O₄ heterostructure for optimized energy band alignment and incorporates plasmonic Ag@CoFe₂O₄ nanocomposites to facilitate electron transport, significantly enhancing photoelectric conversion efficiency. A sandwich-type signal amplification strategy was employed, achieving an ultra-low detection limit of 0.1034 pg/mL (S/N = 3) and a broad linear range of 10⁻³–10² ng/mL, representing a two-order-of-magnitude improvement in sensitivity over conventional ELISA. The sensor demonstrated exceptional specificity, successfully distinguishing collagen from non-collagenous proteins and differentiating bovine collagen from pig collagen. In addition, it exhibited high stability and reproducibility, with a relative standard deviation (RSD) of 2.97%. Practical applicability was confirmed through qualitative and quantitative analysis of leather samples from multiple archaeological sites in Xinjiang, China. These results establish the proposed immunosensor as a reliable and robust tool for ancient leather identification, with potential applications in the analysis of other protein-based archaeological materials.
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危险品化学品经营许可证（带存储）