SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Chao-Ying Gao,Yang Li,Wenbo Wang,Chenyu Liu,Jinghai Liu,Yang Yang
Developing heterogeneous catalysts capable of activating inert CO 2 under mild conditions remains a central challenge in sustainable chemistry. Herein, we report the rational design of a robust bimetallic platform, MOF-253-0.5(Cu/Ag), constructed by post-synthetic incorporation of synergistic Cu(II) and Ag(I) sites within the 2,2′-bipyridine pockets of the MOF-253 framework. The catalyst exhibits high turnover frequencies (TOF) of 260 h −1 under ambient conditions, ranking among the highest reports. It also maintains robust stability over 5 cycles, achieving a cumulative turnover number (TON) of 999.2. Even under diluted CO 2 conditions mimicking industrial flue gas, its catalytical activity remains largely unaffected. 1 H NMR mechanistic analysis was used to monitor the reaction processes. Comparative experiments with monometallic and pristine MOF confirm the superior performance of the bimetallic system, attributed to Cu/Ag synergy that activates both the C≡C bond and CO 2 . Furthermore, comprehensive density functional theory (DFT) calculations provided clear insights into the energetics and elementary steps of the catalytic cycles. This work highlights the power of site-isolated bimetallic MOFs in CO 2 chemical fixation.
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Chemical Engineering and Processing-Process Intensification
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2026
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IF 4.2
Hongyan Huang,Zihao Li,Zewen Chen,Shengji Wu,Hui Wang,Jie Zhou
As primary precursors of particulate matter (PM), volatile organic compounds (VOCs) and soot have emerged as major contributors to air pollution in recent decades. It is urgent and significant to develop high-performance catalysts for the catalytic oxidation of VOCs and soot. In this work, we report a feasible approach for the preparation of Ag-supported CeO 2 catalysts (Ag/CeO 2 -HP) via the combination of impregnation and plasma treatment, and evaluate their performance in catalytic oxidation. Comprehensive characterization results demonstrate that the non-thermal plasma treatment can effectively enhance the dispersion of Ag nanoparticles and enrich the concentration of surface oxygen vacancies in the catalyst. Furthermore, Ag/CeO 2 -HP possesses the highest concentration of the highly surface active oxygen species. Thus, Ag/CeO 2 -HP exhibits the highest catalytic activity for catalytic oxidation of VOCs and soot among all the catalysts prepared. The T max value for soot over Ag/CeO 2 -HP is 383 °C, compared to 409 °C over Ag/CeO 2 prepared by the conventional equivalent-volume impregnation method. Under demanding reaction conditions (1000 ppm hexane, GHSV 75,000 h −1 ), the T 98 values for n-hexane over the Ag/CeO 2 -HP and Ag/CeO 2 catalysts are 295 and 339 °C, respectively. The work provides an efficient strategy to prepare supported catalysts with enhanced catalytic activity.
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Food Bioscience
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2026
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IF 6.2
Qiaoqiao Shi,Li Lu,Tao Liu,Qian Chen,Dezhao Kong,Hua Ye
Kanamycin (KAN) residues in food pose a serious risk to human health, necessitating the development of rapid and sensitive detection methods. Herein, a novel surface-enhanced Raman scattering (SERS) aptasensor for ultrasensitive detection of kanamycin, which integrates hollow Au/Ag alloy nanourchins (HAAA-NUs) tags with high-density “hot spots” and exonuclease III (Exo III)-assisted cyclic amplification. In the presence of KAN, its specific binding with the KAN aptamer (KAN-Apt) triggers the release of complementary DNA (cDNA), followed by hybridization with hairpin DNA (HAP) and Exo III-mediated digestion, resulting in cyclic amplification of target DNA. The amplified target DNA serves as a bridging mediator that specifically hybridizes with the DNA1 immobilized on Fe 3 O 4 @Au nanoparticles (NPs) and the DNA2 anchored on PATP-loaded HAAA-NUs, leading to the formation of a Fe 3 O 4 @Au NPs-DNA1/target DNA/DNA2-HAAA-NUsPATP complex, which subsequently produces a strong SERS signal. In addition, the background signal can be effectively reduced through magnetic separation. Under optimal conditions, the SERS aptasensor exhibited a wide detection range for KAN from 1 to 10 5 fg/mL with a good linear correlation (R 2 = 0.9913), and a limit of detection (LOD) as low as 0.12 fg/mL. It also performed satisfactorily in the analysis of real samples (milk and honey), achieving good recoveries ranging from 89.72% to 112.54%. Moreover, the method demonstrated excellent specificity and stability.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Xiaoqi Zhu,Xiaotie Shen,Baoliang Chen,Xiaoying Zhu
A visible-light-responsive bilayer photocatalytic membrane was constructed using 1D tubular carbon nitride and 2D graphene. • A TCN–Ag/AgBr heterojunction significantly enhanced intrinsic photocatalytic efficiency under visible light. • Graphene simultaneously enriched pollutants and acted as an electron acceptor to promote charge transfer. • Over 99% SMX removal was achieved after a single pass at a flux of 6.3 L m −2 h −1 . • The membrane exhibited stable performance over multiple cycles, showing strong potential for antibiotic removal. Photocatalytic membranes provide an effective platform for the direct removal of water contaminants. However, most photocatalytic membranes are constructed by simply integrating catalysts with membrane materials, without fully exploiting the retention capability of membranes. Meanwhile, inefficient photogenerated carrier dynamics limit the coupling between photocatalytic reaction kinetics and flow-through mass transfer during filtration, hindering the single-pass removal of recalcitrant pollutants such as antibiotics. Herein, a dual-layer photocatalytic membrane was designed to fully leverage the synergistic roles of photocatalysis and membrane separation by utilizing the efficient light harvesting of the upper layer, the pollutant retention and enrichment capability of the lower layer, and the effective electron separation and transfer properties of the photocatalytic and membrane materials. The membrane was rationally constructed via sequential assembly of Ag/AgBr-modified one-dimensional tubular carbon nitride (TCN) onto a multilayered graphene membrane, forming an integrated Ag/AgBr-TCN-GO heterostructure. Under a flux of 6.3 L m −2 h −1 the prepared membrane achieved over 99% removal of sulfamethoxazole (SMX) in a single filtration pass, while its SMX removal capacity per unit time and unit membrane area was 32.64% higher than that of previously reported membranes evaluated under visible light based on the normalized areal removal metric defined in this work. The membrane also exhibited promising removal performance toward other representative contaminants such as tetracycline and bisphenol A. Mechanistically, the TCN-Ag/AgBr promoted efficient electron generation and directional charge transfer, while the graphene oxide layer facilitated electron transport and suppressed recombination. Meanwhile, filtration-induced pollutant retention enriched contaminants on the membrane surface, enabling more efficient utilization of photogenerated electrons. This work establishes an effective strategy for coordinating charge-carrier dynamics with pollutant transport during filtration, enabling single-pass photocatalytic water treatment. Download: Download high-res image (119KB) Download: Download full-size image
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2026
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IF 4.1
Wu Zejun,Ji Meiyu,Feng Sizhang,Zhang Xichun,Gan Ning,Zhao Cheng,He Jincan
The overuse of enrofloxacin (ENR) in aquaculture poses significant threats to ecological security and food safety, generating an urgent demand for instrument-free on-site detection. Herein, a Listeria -templated Ag-Pt bimetallic nanozyme ( Listeria -Ag@Pt) was fabricated via a bacteria-templated in situ mineralization strategy. The intact bacterial template not only prevents nanoparticle aggregation to maximize peroxidase-like activity but also imparts inherent molecular recognition capability toward ENR without requiring antibodies or aptamers. The presence of ENR can enhance the catalytic efficiency of the nanozyme, significantly accelerating the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H 2 O 2 to produce blue oxTMB. Based on this target-enhanced chromogenic response, a colorimetric sensing platform was established, exhibiting a wide linear range of 0.0025–20 mg/L and a low limit of detection (LOD) of 0.8 ng/mL. The method afforded satisfactory recoveries of 92.7%–105% with relative standard deviations (RSDs) of 2.2%–7.3% in aquatic products. With advantages of cost-effectiveness, simplicity, and excellent anti-interference performance in complex matrices, this naked-eye detection strategy shows promising application prospect for on-site monitoring of ENR residues. Graphical abstract
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MATERIALS RESEARCH BULLETIN
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2026
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IF 5.8
Yunong Wang,Yiting Wang,Bo Jiang,Ji Sun,Huiting Mao,Jindou Huang,Wei Zhang,Ruinian Hua
A dual-channel energy transfer in Ag + /Er 3+ co-doped Cs 2 NaBiCl 6 was revealed. • The energy transfer from STE to Er 3+ is a phonon-assisted cooperative foster energy transfer. • White LEDs with a single Ag + /Er 3+ co-doped Cs 2 NaBiCl 6 phosphors were achieved. Herein, the photoluminescence of hydrothermally synthesized Cs 2 NaBiCl 6 is controlled by Ag + and Er 3+ co-doping, and a dual-channel ET mechanism is proposed. When doped with Ag + , the photoluminescence of Cs 2 NaBiCl 6 increases by as much as 24.7 times. We have discovered that Ag + can reduce the band gap width, break the parity symmetry of the transition, and significantly enhance the strength of STE. Futher, new luminescence center was introduced in Ag + /Er 3+ co-doped Cs 2 NaBiCl 6 . Femtosecond transient absorption (fs-TA) spectroscopy data indicate that there exists a dual-channel ET process from (Ⅰ) the host to Er 3+ and from (Ⅱ) the host to the self-trapping exciton state and then back to Er 3+ . As the bridge of ET, Ag + alters the local symmetry of the Er 3+ site, significantly facilitating the energy transfer from STE to Er 3+ , and increasing the probability of Er 3+ radiation recombination. Futhermore, white LEDs with a single host phosphors have been achieved. Download: Download high-res image (145KB) Download: Download full-size image To address the problem of low photoluminescence efficiency in double perovskite materials, Ag + and Er 3+ were doped into Cs 2 NaBiCl 6 to enhance luminescence. Doping with Ag + increased the photoluminescence of Cs 2 NaBiCl 6 by 24.7 times. The energy transfer mechanisms among ns 2 metals, transition metals, and rare earth ions were investigated, and a dual-channel energy transfer mechanism was proposed. Furthermore, white LEDs using a single phosphor have been achieved, with color coordinates of (0.327, 0.338). This work provides a new perspective for designing novel double perovskites to realize unique dual-channel energy transfer and white LEDs.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 9
·603
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IF 5.4
Wang Yue,Li Zetong,Wang Jie,Bian Ziyang,Yang Zhenshan,Li Hefu
A practical surface-enhanced Raman scattering (SERS) substrate is reported constructed by depositing Ag nanoparticle dimers (Ag NDs) onto a polydimethylsiloxane (PDMS) film with macroscopic cavity arrays (MCA). This design integrates the synergistic advantages of large-aperture and shallow-depth MCA, as well as Ag NDs with abundant nanogaps, achieving a well-balanced combination of sensitivity, uniformity, and operability for rapid testing. The open MCA structure, fabricated using commercial toothbrush bristles as a template, not only facilitates analyte enrichment through spatial confinement but also serves as a patterned scaffold for depositing densely plasmonic Ag dimer arrays, which generates high-density SERS hotspots. The optimized Ag NDs@MCA substrate exhibits desirable SERS performance, including good sensitivity, satisfactory uniformity, and reliable batch-to-batch reproducibility. Furthermore, the naked-eye-distinguishable cavities allow direct visual positioning of detection sites, significantly simplifying testing operation. Coupled with a portable Raman spectrometer, the as-prepared SERS substrate achieved fast trace determination of malachite green (10⁻ 6 M) in lake water and thiram (10⁻ 7 M) on apple surfaces. This low-cost, practical SERS substrate demonstrates great potential for on-site environmental monitoring and food safety screening. Graphical
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Molecular Catalysis
·
2025
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IF 4.9
Min Yang,Shuang Sheng,Ziyi Wan,Yaoyao Xu,Rui Qi,Xiaofeng Luo,Weiyu Pan,Kunshan Yang,Ziqing Zhang,Guowei Deng
Hydrogen evolution reaction (HER) is a key step in the production of hydrogen (H 2 ) by overall water splitting, which is of great significance for the storage and conversion of renewable energy. Nevertheless, the elevated excess potential and insufficient stability of catalysts constrain their industrial applicability. Due to the poor catalytic activity of NiWO 4 in alkaline solution, this study investigated the effect of IB metal (IB=Au, Ag, Cu) ion doping and its interaction with different concentrations of IB x /NiWO 4 ( X = 1,2,3,4 mmol) on catalytic activity to achieve stable H 2 in alkaline media. In 1.0 M KOH solution, the current density is 10 mA cm −2 , the Au 3 /NiWO 4 exhibits a low overpotential is 86.11 mV, the slope of Tafel is 115.16 mV dec −1 , and the overpotential of Ag 3 /NiWO 4 is 168.41 mV, with a Tafel slope of 64.32 mV dec −1 , the catalyst also showed long term stability for 150 h, the Au 3 /NiWO 4 NF‖Au 3 /NiWO 4 NF catalysts achieved a low voltage of 1.45 V at 10 mA cm −2 current density for 100 h. The synergistic interactions of bimetals present a novel approach for enhancing catalyst design and optimizing performance.
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Nanoscale
·
2025
·
IF 5.1
Hong Wang,Xin Yang,Tong Zhu,Xiao Su,Liang Xiao,Qianqian Yu,Pingan Liu,LinGe Wang
The integration of electromagnetic wave absorption, antibacterial functionality, and environmental remediation into a single composite material remains a formidable challenge due to conflicting material property requirements. To address this, we fabricate plasmonic MXene/Au@Ag core–shell nanocomposites via in situ reduction, leveraging the synergistic effects of bimetallic architecture and MXene's tunable surface chemistry. The Au@Ag core–shell nanoparticles enhance interfacial polarization and plasmonic resonance, enabling ultra-broadband absorption (7.6 GHz effective absorption bandwidth) with a minimum reflection loss of −42.93 dB at 2.8 mm thickness, alongside a 42.9 dB m2 radar cross-section reduction. Concurrently, the composite exhibits >95% antibacterial efficiency via Ag+ release and light-triggered ROS generation, alongside >90% adsorption capacity for organic pollutants through MXene's functionalized surface. By unifying electromagnetic stealth, antimicrobial action, and environmental remediation, this work establishes a versatile platform for next-generation composites in aerospace, biomedical, and environmental engineering.
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PubMed
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Alexandria Engineering Journal
·
2025
·
IF 6.8
Yingming Mu,Haiya Zhang,Tao Ya,Liang Duan
Electrospun nanofiber membranes incorporating ZnO and Ag nanoparticles were developed using a coaxial electrospinning technique to address microbial contamination in urban water bodies. Polycaprolactone (PCL) served as the polymer matrix, and five formulations (S0–S4) with increasing nanoparticle concentrations were synthesized. Morphological analyses revealed uniform fiber formation with optimal distribution of ZnO and Ag at moderate loadings. S3 (3 wt% ZnO, 0.3 wt% AgNO₃) exhibited a mean fiber diameter of 487 nm, pore size of 2.0 µm, and porosity of 82.8 %. ATR-FTIR and XRD analyses confirmed the presence and dispersion of the incorporated nanoparticles without altering PCL’s structural integrity. Wettability improved significantly, with water contact angle decreasing from 114.3° (S0) to 93.4° (S4). Mechanical testing showed that S3 retained tensile strength (4.3 MPa) and ductility (180 % elongation). Antibacterial assays demonstrated a peak inhibition zone of 11.2 mm against Staphylococcus aureus and 10.4 mm against Escherichia coli . Filtration trials using simulated urban wastewater revealed that S3 achieved a log reduction value of 4.4 (corresponding to 99.996 % bacterial removal), reduced turbidity by 91.8 %, and lowered conductivity by 12.3 %. Despite reduced flux with increasing nanoparticle content, S3 maintained a satisfactory water flux of 112.6 L/m 2 ·h. These multifunctional membranes offer a promising route for enhancing microbial safety and improving physical water quality without the drawbacks of traditional disinfection. This study provides insights into nanoparticle–polymer interactions and offers design guidelines for practical, high-performance water purification systems in urban environments.
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BIOMEDICAL MICRODEVICES
·
2025
·Vol. 27
·期 4
·1-12
·
IF 3.3
Zhang Jingfei,Nan Xuanxu,Yang Li,Cui Yue
The Lateral flow immunoassay (LFIA) has been widely used in environmental monitoring and disease diagnosis due to its advantages of low cost, simple operation, and convenience. However, its accuracy and sensitivity remain major challenges to be addressed. D-dimer is an important biomarker for thrombotic diseases. In this work, we show for the first time a core–shell Au@Ag nanoparticle (NP) labeled colorimetrically enhanced LFIA for D-dimer detection. The superior performance of Au@Ag LFIA stems from the silver shell's enhancement of plasmon resonance, which boosts optical signals to yield brighter scattering and superior visual contrast. Compared with conventional AuNPs, Au@AgNPs significantly improve sensitivity, leading to more accurate results. The detection limit for D-dimer was improved by approximately tenfold, reaching 1 ng/mL, due to the improved cross-coupling efficiency of Au@AgNPs compared with AuNPs. We anticipate that, with further development and validation, this enhanced LFIA could become a valuable tool in a wide range of clinical diagnostic applications.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qi Liang,Tao Liao,Liqin Zhu,Changxiang Liu,Qian Liu,Jianhua Xiong,Ruiping Deng,Xiaoning Liao
A novel nanocomposite consisting of core (Cu)-shell (Ag) nanoparticles encapsulated in carbon nanotubes (CTs) grown on a MOF-derived carbon framework was synthesized by in-situ pyrolyzing method. After further modification with multi-walled carbon nanotubes (MWCNTs), a hierarchical porous carbon network confined core (Cu)-shell (Ag) bimetal (Cu@Ag@CTs/MWCNTs) with excellent catalytic properties to isoproturon (ISO) and norfloxacin (NOR) was obtained. The electrochemical sensor based on the Cu@Ag@CTs/MWCNTs can simultaneously detect the ISO and NOR with excellent sensitivity, good selectivity and perfect stability as well as a separation of peak potential of 270 mV. The calibration curves for ISO and NOR achieved by the proposed sensor range from 80 nM to 18 μM and 7.0 nM to 1.7 μM with detection limits of 26 nM and 2.0 nM, respectively. Moreover, the sensor shows good recoveries in simultaneous detection of ISO and NOR in real sample analysis, highlighting its high feasibility in practical application.
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