WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 11
·646
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IF 3.5
Xiao Yongbo,Gao Yanjiao,Bai Fan,Xiao Jing
The increasing contamination of aquatic environments by antibiotics calls for efficient, economical, and environmentally sustainable remediation technologies. This study presents a zero-valent iron (ZVI)-activated periodate (IO 4 − ) advanced oxidation system for the degradation of oxytetracycline (OTC) in water. Under optimized conditions (pH = 3, ZVI = 1.64 g/L, IO 4 − = 1.97 mM), the ZVI/IO 4 − system achieved 81.16% OTC removal. Notably, coupling with UV irradiation enabled complete OTC degradation within 50 min, demonstrating substantial enhancement over the standalone system. Mechanistic investigations revealed that IO 3 • , 1 O 2 , and O 2 •− were the dominant reactive species, and three degradation pathways were proposed based on LC–MS analysis. The system exhibited excellent performance in real water matrices, achieving 78.0% and 71.9% OTC removal in tap water and lake water, respectively, along with strong tolerance to coexisting ions and humic acid. Importantly, the ZVI catalyst retained 96.4% of its initial activity after five consecutive cycles, significantly reducing operational costs and secondary pollution risks. This work provides an efficient, stable, and cost-effective treatment strategy for antibiotic-contaminated water, holding strong promise for practical engineering applications.
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JOURNAL OF FLUORESCENCE
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2026
·
IF 3.4
Zhou Pingping,Hu Zhongshuang,Liu Wenfei,Ji Jing
Surfactants are widely used across diverse industries. Critical micelle concentration (CMC) is a key parameter governing their performance. While various established methods exist for characterizing CMC, there remains an urgent need for more sensitive, visually detectable, and versatile detection technologies to keep pace with the rapid advancement of novel surfactants. Herein, we report the development of a fluorescent probe SP-18, which synthesized by introducing a long alkyl chain into a low-toxicity fluorescein dye. By incorporating a hydrophobic n-octadecyl chain into the water-soluble fluorescein dye, the probe aggregates in aqueous media, leading to fluorescence quenching. Upon the addition of surfactants, (including anionic surfactant SDS, cationic surfactant DTAB, zwitterionic surfactant SB3-12, and nonionic surfactant Triton X-100), the probe inserts into the micelles that form. This leads to dissociation of fluorescent aggregates and triggers a fluorescence “turn-on” response. Specifically, SP-18 exhibits distinct spectral shifts (e.g., a blue-shifted emission and unique absorption changes) for SDS, enabling its selective identification among the four surfactant types. This work provides the probe SP-18 as a dual-function tool for robust CMC determination and specific surfactant identification.
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PubMed
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Reaction Kinetics Mechanisms and Catalysis
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2026
·
IF 2.1
Wu Shengmin,Mei Caihua,Yang Gong,Yao Lei
Waste-derived magnesia brick powder (WMBP), enriched in magnesium oxide (MgO) and abundant Lewis acid–base surface sites, was employed as a robust heterogeneous catalyst for the catalytic ozonation of methylene blue (MB). Non-linear kinetic fitting demonstrated that the WMBP/O₃ system followed an apparent first-order degradation pathway with a rate constant of 0.2563 ± 0.011 min⁻ 1 , approximately 15-fold higher than that of sole ozonation (0.0165 ± 0.002 min⁻ 1 ). Mineralization was similarly enhanced, with total organic carbon (TOC) decay accelerating from 0.0035 ± 0.0011 min⁻ 1 (single ozonation process) to 0.0693 ± 0.0102 min⁻ 1 (catalytic ozonation process). Electron spin resonance analysis and selective quenching experiments confirmed the simultaneous generation of •OH, O₂•⁻, and 1 O₂, indicating a hybrid radical/non-radical oxidation regime. Ultra-high-performance liquid chromatography coupled with tandem mass spectrometry characterization revealed a sequential degradation pathway involving N-demethylation, S-oxidation, hydroxylation, and aromatic ring-opening. The WMBP catalyst exhibited excellent long-term stability over ten reuse cycles, maintaining > 90% degradation efficiency through the fourth cycle and > 78% even after the tenth cycle, highlighting its structural resilience and sustained ozone-activation capability. These findings provide new mechanistic insights into MgO-mediated catalytic ozonation and underscore the circular-economy potential of valorizing refractory industrial waste into a high-performance reusable catalyst.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2026
·Vol. 34
·期 3
·60
·
IF 5.6
Ali Muhammad Amir,Jiang Yongchao,Tang Keyong
To enhance the biological activity of Sargassum fusiforme , a brown algae, polysaccharides were extracted and degraded using two methods: ultrasound-assisted hydrochloric acid (yielding U-SFP) and α-amylase-assisted hydrolysis (yielding M-SFP). A Box-Behnken response surface design (BBRS) was used to optimize the degradation conditions. Structural changes before and after treatment were analyzed, including molecular weight variations during in vitro digestion. The relationship between the structural characteristics and antioxidant activity of the degradation products was established, revealing significant impacts on surface morphology, solubility, crystallinity, and triple-helix structure. The DPPH radical-scavenging activities of U-SFP and M-SFP were 0.106 mg/mL and 0.045 mg/mL, respectively, compared to 0.029 mg/mL for native SFP. Similarly, the ferric reducing power of both U-SFP and M-SFP was significantly higher than that of native SFP. These results demonstrate that controlled degradation enhances the antioxidant capacity of Sargassum fusiforme polysaccharides, highlighting their potential for industrial and biomedical applications.
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ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2026
·Vol. 48
·期 5
·227
·
IF 4.3
Zeng Yue,Liu Zhennan,Jiang Yajie,Li Yunqin,Yu Wei,Yu Rong,Xu Xiang,Xiao Meiling
Arsenic (As), particularly in its bioavailable species of inorganic As(Ⅲ) known for its significant toxicity and mobility, is a carcinogenic risk to humans. Serving as an innovative analytical tool, the diffusive gradients in thin films (DGT) technique facilitates on-site detection of bioavailable metals. However, the options of DGT binding gels tailored for As(Ⅲ) detection remain elusive. This study undertook the modification of tetraethyl orthosilicate with a 3-mercaptopropyl-trimethoxysilane to synthesize cost-effective nanomaterials endowed with the capacity for selective adsorption of As(Ⅲ) through copolymerization and atmospheric pressure drying. The synthesized materials were systematically characterized using X-ray diffraction, scanning electron microscopy, and C/H/N/S elemental analysis, revealing a specific surface area of 472.39 m 2 /g, a particle size of 12.7 nm, and a loading capacity of 3.115 mmol/g. The DGT combined with gel prepared from this material has a specific affinity for As(III) without adsorbing As(V).Its adsorption efficiency for As(III) may reach 84.5% within the first hour. This DGT technique has a linear detection range of 0.5–15 mg/L (R 2 = 0.99995), an elution recovery of 85.1%–102.7% (RSD < 10%, n = 3), and a maximum adsorption capacity of 301.7 μg/cm 2 , meeting requirements for long-term environmental monitoring. The experiment studied the effects of interfering factors, including pH values ranging from 3–9, ionic strength of 10–500 mmol/L NaNO₃, Fe 2 ⁺ 0–5.0 mg/L, Mn 2 ⁺ 0–1.0 mg/L, As(V) 0–5.0 mg/L, dissolved organic carbon 0–20.0 mg/L, SO₄ 2 ⁻ 0.55–1.10 g/L, and PO₄ 3 ⁻ 5.0–10.0 mg/L. The device maintained a stable treatment performance under all these conditions. When the DGT device was deployed in spiked river water, estuarine water, and seawater, a comparison of its adsorption performance with existing methods showed that the device had a comparable adsorption performance and demonstrated excellent long-term stability in practical water environment applications.
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Advanced Fiber Materials
·
2026
·
IF 22.6
Yin Juhui,Liu Haoxin,Zheng Yu,Zhang Puqin,Fan Tianyu,Wu Hongyan,Zong Dingding,Liu Yong,Li Yuyao
To effectively ensure the safety of workers in harsh working environments, it is crucial to develop a flexible aerogel sensor that integrates real-time monitoring and physical protection functions. Here, a parallel-sheet structured poly(amide-imide)/bismaleimide/benzoxazine (PAI/BMI/BA-a) fiber aerogel (denoted as PSPBB) was fabricated by ingeniously establishing the bridge-mediated dual affinity between fibers and ice crystals. Benefiting from the interactions of poly(styrenesulfonate) (PSS) with ice crystals, conductive poly(3,4-ethylenedioxythiophene) (PEDOT):PSS chains underwent oriented assembly along with the directional growth of ice crystals, while being stably anchored to fibers by virtue of the interactions of PSS with polydopamine (PDA) on the fiber surface. The resultant PSPBB aerogels exhibited a robust scaffold, outstanding fatigue resistance (over 90% height retention after 200 compression cycles), stable sensing performance under 8000 compression cycles, and ultra-wide temperature adaptability (−196 °C to 200 °C). Additionally, the parallel sheets within porous aerogels contributed good thermal-insulation properties, providing real-time monitoring for physiological signals while also offering a critical personal protective barrier. These results underscore the potential of PSPBB aerogels for use in demanding sectors, such as industrial safety, firefighting, and aerospace. Graphical
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Journal of Inorganic and Organometallic Polymers and Materials
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2026
·
IF 6
Zhao Shuwei,Gao Zhongzhe,Tu Qunzhang,Shen Xinmin,Yin Qin,Yang Xiaocui,Liu Qing,Yang Fei,Wang Enshuai,Peng Wenqiang,Xu Ting
The bending of one‑dimensional (1D) fibrous fillers, such as multi‑walled carbon nanotubes (MWCNTs), within a composite matrix often results in an overestimation of the thermal conductivity (TC) enhancement—an effect commonly overlooked in conventional modeling. In this work, a uniformly dispersed 4.2 phr MWCNTs/natural rubber (NR) composite prepared by solution blending served as the model system, exhibiting a 125% increase in TC. A simple image‑derived parameter \(\gamma\) was introduced to quantify the fiber curvature based on transmission electron microscopy (TEM). Finite‑element models of MWCNTs constructed with random Bézier curves yielded an average \(\gamma=\) 1.203, closely matching the TEM‑statistical value of 1.194 (< 1% error), and a range of 0.867 versus 0.909 from TEM (< 5% error). Modeling comparisons showed that a parallel‑equivalent solid cylinder model based on effective‑medium theory deviates by only 0.2% from a hollow‑tube model while substantially reducing computational cost. From the simulation data, an effective aspect ratio ( \(kₑ\) ) was derived and incorporated into the Mori–Tanaka model, correcting its underestimation of bending effects and lowering the prediction error to 6.8% relative to experimental data. The presented TEM‑based curvature characterization is broadly applicable to other 1D‑nanomaterial‑reinforced composites, and the refined Mori–Tanaka model provides improved accuracy for theoretical predictions.
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JOURNAL OF NANOBIOTECHNOLOGY
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2026
·
IF 15
Jinfan Zhou,Gaohua Li,Yunze Xu,Wenhui Ma,Xuehua Zhang,Haitao Yuan,Zilin Tan,Zhenghao Li,Hongwei Yu,Zhenzhao Xu,Zhiqiang Yu,Jiafei Xi,Chaoping Fu,Yanan Wang
The treatment of solid tumors with chimeric antigen receptor natural killer (CAR-NK) cell therapy confronts significant barriers, notably poor cellular infiltration and a highly immunosuppressive tumor microenvironment (TME). To overcome these challenges, we developed selenium-containing polymer nanoparticles (ManNAl-SeNPs) loaded with dibenzocyclooctyne (DBCO)-modified mannose. Metabolic glycoengineering metabolic glycoengineering (MGE) enabled efficient labeling of exogenous DBCO on azide (N 3 ) groups on CAR-NK cells, establishing a bioorthogonal click chemistry targeting strategy, significantly improving the anti-tumor activity of azide-CAR-NK (N 3 -CAR-NK) cells, including recognition specificity, migration efficiency, and cytotoxic activity. Herein, ManNAl-SeNPs with ultra-sensitive responsiveness of diselenide bonds, in the acidic TME, diselenide bond releases seleninic acid, acting as an immune checkpoint inhibitor while augmenting CAR-NK cells cytotoxicity. In vivo, the combination of ManNAl-SeNPs with N 3 -CAR-NK cells significantly increased targeting capacity and invasiveness. This study presents a TME-responsive nanoplatform with artificial bio-orthogonal combination strategy that effectively enhance the migratory ability and accumulation of CAR-NK cells for potent antitumor therapy.
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高影响因子
JOURNAL OF POLYMER RESEARCH
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2026
·Vol. 33
·期 3
·84
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IF 3.5
Fu AiWei,Liang Yaodong,He Yongjun
In the field of aqueous metal ion removal, conventional metal ion extraction methods often face limitations such as low separation efficiency and leaching of extractants, leading to secondary environmental contamination. This study used the Pickering emulsion templating method, with gelatin/sodium alginate complexes as stabilizing particles, to fabricate a Pickering emulsion hydrogel (PEHG) loaded with the zinc extractant di-(2-ethylhexyl) phosphoric acid (P204). The resulting hydrogel system not only improves emulsion stability but also effectively sequesters Zn 2 ⁺ ions from aqueous solutions. The structure of the materials was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The influence of pH, adsorbent dosage, initial zinc concentration, and contact time on adsorption capacity was investigated by the study. Results showed that at pH 4, the PEHG exhibited a maximum adsorption capacity of 13.47 mg g⁻ 1 for Zn 2 ⁺. The adsorption behavior follows pseudo-second-order kinetics and fits the Langmuir–Freundlich isotherm, suggesting a chemisorption-dominated mechanism. This corresponds to monolayer adsorption of a single solute from dilute solution onto heterogeneous surfaces. The adsorbent retains over 80% removal efficiency through five regeneration cycles, demonstrating excellent reusability. This study establishes a theoretical framework for preparing extractant-incorporated Pickering emulsion hydrogel microspheres using gelatin/sodium alginate composites. We developed an environmentally friendly and cost-effective adsorbent for heavy metal ions.
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Journal of Central South University
·
2026
·Vol. 33
·期 1
·144-159
·
IF 4.7
Yuan Rui,Tang Zhi-xing,Xiao Min-di,Cai Min-zhao,Zhao Zi-long,Gu Lin
Waterborne acrylic coatings are widely utilized due to their cost-effectiveness, high transparency, strong resistance to weather and chemicals, impressive mechanical properties, and excellent adhesion to various substrates. In these coatings, a reactive emulsifier containing phosphate groups can be integrated into the molecular chain during polymerization, which enhances the coating’s compactness and corrosion resistance. This work focuses on the synthesis of styrene-butyl acrylate (St-BA) latex and methyl methacrylate-butyl acrylate (MMA-BA) latex using the reactive phosphate emulsifier ANPEO 10 -P 1 through seed emulsion polymerization, achieving a conversion rate of approximately 99% and a solid content close to 50%. The resulting coatings from St-BA and MMA-BA latexes demonstrated long-term corrosion protection for carbon steel and aluminum alloy due to in-situ phosphatization, effectively preventing flash rust. Notably, the MMA-BA coating exhibited remarkable durability, enduring immersion for up to 1224 h (51 d) on Q235 carbon steel before reaching the failure threshold (∣ Z ∣ 0.01Hz ≤10 6 Ω·cm 2 ) on Q235 carbon steel. On 5052 aluminum alloy, the St-BA coating maintained ∣ Z ∣ 0.01Hz >gt;10 8 Ω·cm 2 for 480 h (20 d). Furthermore, the corrosion resistance of St-BA and MMA-BA coatings on Q235 steel sheet and 5052 aluminum alloy surpassed that of commercially available MMA-BA and St-BA coatings after immersion in a 3.5 wt% NaCl aqueous solution. This work also delves into the anticorrosion mechanism of MMA-BA and St-BA coatings.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
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2026
·Vol. 56
·期 4
·65
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IF 3.7
Chen Xue,Luo Qiufen,Zhang Hongfang
Developing a simple, rapid and sensitive rutin sensor is of great importance for the quality control or dietary guidance of some agriculture products. Herein, an electrochemical sensor for the quantification of rutin was developed based on the bimetallic nanoparticles with gold as core and platinum as shell. The nanoparticles were prepared by using MoS 2 nanosheets as heterogeneous substrate and reductant for the gold precursor. The morphology of the ultimate nanocomposite was tuned by the amount of gold precursor. With a relatively big amount of chloroauric acid, the nanocomposite exhibited a sea urchin-like core-shell morphology with monodispersity. Moreover, contributing to the large specific area and excellent conductivity of this nanocomposite, the modified electrode prepared with the bimetallic nanoparticles mediated with MoS 2 nanosheets exhibited a response almost twice that of the electrode modified with the single material. As results, the developed electrochemical sensor displayed a broad quantification range from 20 nM to 1 µM with a limit of detection of 3 nM and high sensitivity of 149.3 µA µM − 1 cm − 2 . In addition, the sensor exhibited excellent stability and reproducibility. The recovery results for onion samples demonstrated the application promise of the sensor in various agriculture products. Graphical abstract Adjusting the amount of HAuCl 4 results in two different materials. The performance of electrodes modified with MoS 2 -Au 100 @Pt or MoS 2 -Au 300 @Pt materials is compared. The electrochemical sensor developed by MoS 2 -Au 300 @Pt exhibits the highest sensitivity, and thus is applied to the determination of rutin in onion samples.
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Science China-Materials
·
2026
·Vol. 69
·期 6
·3312-3323
·
IF 7.7
Yin Ruize,Liu Juan,Zhang Xiaohui,Wang Peinan,Lu Jiajie,Xiong Weiwei,Yuan Saisai,Zheng Fenfen,Zhang Junhao,Zhu Wenlei
Amorphous metal-organic frameworks (aMOFs), owing to their abundant defects and unsaturated coordination sites, have emerged as ideal precursors for investigating electrocatalytic reconstruction mechanisms. However, a systematic understanding of how different modulation strategies affect the reconstruction pathways of amorphous MOFs and thereby determine the nature of the final active species remains lacking. In this study, an amorphous MOF constructed from 3,4,9,10-pyrene-tetracarboxylic acid (PTA) was employed as a controllable precursor platform to systematically compare two classical strategies (doping and alloying) in terms of their effects on structural reconstruction and oxygen evolution reaction (OER) performance. The results reveal that doping promotes preferential reconstruction into Fe-rich (oxy)hydroxides with more exposed active sites, whereas alloying tends to yield Fe-Co mixed (oxy)hydroxides with limited site exposure. Benefiting from this difference, the doped system FeCo 0.05 -PTA exhibits outstanding OER activity under alkaline conditions, with overpotentials of only 208 and 248 mV at 50 and 100 mA cm −2 , respectively, and a low Tafel slope of 36.2 mV dec −1 . In situ Fourier transform infrared spectroscopy (FTIR) captures the OOH* intermediate, confirming that the reaction follows the adsorbate evolution mechanism; density functional theory (DFT) calculations further demonstrate that the doped system possesses the lowest free-energy barrier (Δ G = 0.59 eV) at the rate-determining step. This study underscores the decisive role of precursor design in this system, elucidates the distinct effects of doping and alloying on the reconstruction pathways and final properties of amorphous MOF-derived (oxy)hydroxides, and provides valuable insights for the design and mechanistic understanding of related electrocatalysts.
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