SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Kai-hua Zhang,Ru-Yue Ding,Xin-Jie Zhao,Xiao-jing Wang,Yu-pei Li,Jun Zhao,Fa-tang Li
Sustained photocatalytic hydrogenation of CO 2 molecules is crucial for the CO 2 methanation reaction. Synchronizing directional photogenerated charge carriers and regulating the activation and hydrogenation process of CO 2 molecules are key to achieving the efficient photocatalytic methanation of CO 2 . Herein, Ag–Bi bimetallic sites were designed and anchored on the surface of TiO 2 via a one-step solution impregnation reduction and applied for the photocatalytic conversion of CO 2 to CH 4 . The optimum 5 %Ag 90 Bi 10 -TiO 2 composite exhibited excellent photocatalytic performance for the photoreduction of CO 2 into CH 4 . The product selectivity of CH 4 reached up to 97.2 %, at a rate of 58.9 μmol·g −1 ·h −1 . In situ Kelvin probe force microscopy and diffuse reflectance infrared Fourier transform spectroscopy attributed the high selectivity of CH 4 to the coexistence of metallic Ag and Bi sites, which induced directional photogenerated electrons and hole transfer. Moreover, the synergistic function of Ag–Bi bimetallic active sites on TiO 2 facilitated the hydrogenation of *CO 2 – to CH 4 . The proposed strategy provides insight into the design of highly selective photocatalysts for the reaction of photocatalytic methanation of CO 2 .
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xiao-Jian Li,Xinli Lu,Yunxia Wang,Zhanquan Zhang,Yongfa Zhang
This study successfully developed a highly sensitive electrochemiluminescence (ECL) sensor based on the ECL resonance energy transfer mechanism for detecting the key biomarker of acute myocardial infarction, heart–type fatty acid binding protein (h–FABP). Through the meticulous design of the Ag/Cu2O/Ti3C2 ternary nanocomposite material, this material demonstrated significant catalase–like catalytic activity, enabling the efficient decomposition of H2O2 to generate more superoxide radicals (O₂•⁻), thereby significantly enhancing the ECL signal of the luminol–H2O2 system. Notably, AgS quantum dots (AgS QDs), due to broad–spectrum ultraviolet absorption overlapping with the ECL emission spectrum of luminol, triggered an efficient energy resonance transfer effect, resulting in the decrease of ECL intensity. NH2–MIL–101(Fe) was utilized to couple with AgS QDs (AgS QDs@NH2–MIL–101(Fe)), which can further enhance the quenching efficiency. Based on this signal–off strategy, an ultrasensitive detection platform for h–FABP was successfully constructed. Experimental results indicated that the immunosensor exhibited an excellent response relationship within a wide linear range from 1.00 fg mL–1 to 100 ng mL–1, and a low detection limit reached 0.36 fg mL–1 (S/N = 3). This study provides an innovative methodological approach for ultra–trace detection of myocardial injury markers and demonstrates significant application potential in early clinical diagnosis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Xinru Wang,Jie Zhang,Jinyu Shan,Dong Yang,Guangming Tian,Yunzhi Dang,Jianhua Ma
This study focuses on bacterial cellulose (BC), a material with a three-dimensional network structure, excellent biocompatibility, and superior mechanical properties, to address its inherent limitations of insufficient antibacterial activity and poor rehydration capability. Silver nanoparticles (AgNPs) were synthesized in situ on the BC surface via a hydrothermal method, followed by immersion in polyethylene glycol (PEG) and cefoperazone sodium (CEFNa) solutions to prepare BC/Ag/PEG/CEFNa composite films. The BC films and composites were comprehensively characterized using techniques such as XRD, SEM, and FTIR spectroscopy. Systematic characterization results revealed that the introduction of PEG not only increased the film's moisture absorption and water vapor permeability by 2.8 and 1.7 times, respectively, but also enhanced the CEFNa loading capacity to 1.6 times that of pure BC. Antibacterial experiments demonstrated that while pure BC films exhibited no antibacterial activity, the composite films showed inhibition zone diameters of 15.5 mm, 17.5 mm, and 12.3 mm against Escherichia coli , Staphylococcus aureus , and Pseudomonas aeruginosa , respectively. Mouse wound healing experiments indicated that the wound healing rate of the composite film treatment group was significantly improved by 21.9 % compared to the pure BC group after 15 days. These results demonstrate that the prepared BC/Ag/PEG/CEFNa composite films possess excellent physicochemical properties, significant antibacterial activity, and remarkable wound-healing effects, highlighting their great potential as advanced wound dressings for skin injury repair.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Xuan Li,Yuyan Cao,Yihui Shen,Yulin Wu,Shicong Cui,Lingli Cheng,Xuechun Yang,Zheng Jiao
Nowadays, designing sensing materials possessing both high sensitivity and humidity resistance is still a challenge in the field of sensing materials. In this work, a ternary Ag nanoparticles decorated NiCo 2 O 4 /NiO (Ag/NiCo 2 O 4 /NiO) composite with hollow nanocage structure has been successfully obtained, which uses ZIF-67 as a template combined with self-etching method, followed by NaBH 4 reduction of silver ions. For the synergistic effect of the novel morphology, the presence of Ag nanoparticles and hydroxyl absorbent NiO, and the formation of p-p heterojunction between NiCo 2 O 4 and NiO, Ag/NiCo 2 O 4 /NiO exhibits good humidity resistance and high-sensitive to n-butanol. The mesoporous hollow nanocage morphology not only provides abundant adsorption sites for target gases, but also facilitates the diffusion of water molecules. The doping of Ag nanoparticles can regulate the adsorption of oxygen on the surface of gas sensing materials, improving the sensitivity while suppressing the hydroxyl poisoning reaction process. The hydroxyl absorbent NiO in Ag/NiCo 2 O 4 /NiO can both directly absorb water and form p-p heterojunction structure with NiCo 2 O 4 , which improves sensor performance while suppressing hydroxyl poisoning. In the gas sensing tests, the optimal Ag/NiCo 2 O 4 /NiO composites can achieve a high response value of 31.41, as well as rapid response/recovery times (65 s/47 s) to 100 ppm n-butanol at the working temperature of 170 °C. Moreover, it displays a wide detection range (1–120 ppm), a low detection limit (0.27 ppm), excellent selectivity to n-butanol, and superior long term stability (maintaining a response value of 84.68 % after 14 days). Notably, the optimal Ag/NiCo 2 O 4 /NiO demonstrates great humidity-tolerant ability with a response values fluctuation of 16 % under the range of 33 %-80 % relative humidity. This research provides a feasible approach for designing practical gas sensing materials with high sensitivity and moisture resistance.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Kaiyue Li,Wenhui Li,Ping Huang,Yuquan Zhuo,Ziwen Yang,Bo Wang,Runru Liu,Bing Liu,Enzhu Hou,Shuo Yang,Donglai Han
To address the challenge of achieving simultaneous pollutant removal and real-time monitoring in water remediation, Z-scheme Cu 2 O/g-C 3 N 4 /Ag heterostructures with integrated functionalities for synergistic adsorption, photocatalytic degradation, and surface-enhanced Raman scattering (SERS) detection were developed—hereafter referred to as APS-Hs (adsorption–photocatalysis–SERS heterostructures). Particular emphasis was placed on the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs, incorporating an optimized 1.5 wt% Ag loading. Optical and electrochemical tests demonstrated that the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs significantly enhanced charge separation efficiency and reduced charge transfer resistance. Under visible-light irradiation, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs attained a removal efficiency of 98.1 % for methyl orange (MO) within 45 min and sustained an efficiency of 84.0 % after three consecutive cycles. XRD and SEM analyses conducted before and after photocatalytic cycling confirmed the composite's outstanding structural and morphological stability. Notably, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs demonstrated the highest adsorption capacity (21.34 mg/g) among all samples. Zeta potential measurements revealed a surface charge reversal from + 22.35 mV to −10.29 mV, indicative of strong electrostatic interactions with anionic pollutants. Pseudo-second-order (PSO) kinetic modeling (R 2 =0.971) further established physisorption as the dominant mechanism. Radical trapping experiments verified that the enhanced photocatalytic performance originates from the Z-scheme charge transfer pathway. Additionally, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs substrate achieved a SERS enhancement factor of 3.1 × 10 6 and a broadband self-cleaning capability, underscoring its potential for integrated environmental remediation and sensing applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Deyang Li,Xue Tian,Mengyao He,Chunyu Ding,Dongming Qi,Yangyi Sun
M ultifunctional m icro f iber s ynthetic l eather (MMFL) with antibacterial activity, air permeability, moisture transmission, UV resistance, and mechanical robustness, is highly needed by advanced applications. However, achieving these integrated functionalities often requires complex designs and high filler loadings, leading to aggregation and compromised mechanical performance. Here, we propose a low-filler-content strategy using only 2–5 wt% of silver-decorated l ignin- h ybrid h ollow s ilica sphere s (Ag@LHHSs) in a w aterborne p olyurethane (WPU) to fabricate MMFL with integrated functionalities. The superior performance stems from the synergistic structure-function design of Ag@LHHSs: 1) uniformly distributed Ag n ano p articles (NPs) generate ·OH radicals, providing strong antibacterial efficacy, while simultaneously coordinating with WPU carbonyl/amine groups to enhance interfacial adhesion without compromising mechanical integrity; 2) lignin shell, rich in hydroxyl and sulfonic groups, contributes to UV protection and forms hydrogen bonds with WPU, further improving compatibility; 3) the hollow architecture creates free volume, enhancing breathability and moisture permeability. With only 2–5 wt% Ag@LHHSs, our MMFL achieves antibacterial efficiency of exceeding 99 %, air permeability of 283.4 mm/s (26.0 % higher than neat WPU), and 2 ·24 h water vapor transmission of 7120 g/m 2 (171.1 % improvement), meanwhile maintaining UV resistance and mechanical robustness. This work provides a promising strategy for developing lightweight, low-cost, multifunctional synthetic microfiber leathers via rational nanofiller design and interfacial engineering.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Xinyuan Zhou,Qiyan Sun,Xinlin Wang,Ruixue Zhang,Bin Li,Zexing Wu,Dehong Chen,Lei Wang,Guang-Rui Xu
Synthesis of cost-effective electrocatalysts for oxygen reduction reaction (ORR) has received wide attention due to their sluggish kinetics, which limits the development and application of fuel cell technique. In this work, we report a versatile synthetic approach to prepare a series of small-sized Ag@MNi (M = Pd, Pt, Rh, Ru) nanocrystals with core–shell structures by a simple solvothermal method. According to characterization analysis, surface segregation of Pd was proved in the outermost layer with the Pd-rich shell layer, which can regulate the adsorption energy of *OH. Electrochemical results show that the onset potential and half-wave potential of Ag@PdNi nanocrystals (Ag@PdNi NCs) are 1.005 and 0.913 V vs. RHE (reversible hydrogen electrode), respectively, with a Tafel slope of 55.31 mV dec -1 and strong ORR catalytic durability, which is similar to Ag@MNi (M = Pt, Rh, Ru) NCs and slightly higher than that of PdAg alloy nanoparticles (PdAg alloy NPs), PdNi alloy nanoparticles (PdNi alloy NPs), commercial Pd black and even commercial Pt/C, in alkaline medium. Density Functional (DFT) calculations show that the presence of Ag core effectively promotes the segregation of Pd atoms to the outer shell surface, where Ni provides better segregated substitution sites for Pd, which significantly improves the ORR activity and durability due to the electronic synergistic effect between Ag core nuclei and Pd shell can reduce the adsorption strength of OH ads .
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 26
·1-16
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IF 2.8
Wei Qian,Zheng Meng
Microplastics (MPs) pose significant environmental and health risks, and conventional disposal methods often suffer from inefficiency and potential ecological harm. Photocatalytic degradation has emerged as a promising solution. However, traditional TiO 2 -based photocatalysts are limited by high electron–hole recombination rates, narrow visible light absorption, and poor reusability. In this study, we develop and optimize a Fe 3 O 4 @TiO 2 /Ag nanocomposite for the efficient degradation of polyethylene (PE) MPs with facile recovery. The synergistic integration of Fe 3 O 4 and Ag with TiO 2 enhances visible light absorption and mitigates charge carrier recombination. Notably, the Fe 3 O 4 @TiO 2 /Ag nanocomposite exhibits a degradation efficiency of 15.54%, outperforming Fe 3 O 4 @TiO 2 (12.63%) and pristine TiO 2 (1.15%). Moreover, the composite maintains its performance over five consecutive cycles, underscoring its durability. The degradation efficiency of Fe 3 O 4 @TiO 2 /Ag was further optimized using response surface methodology. Overall, the developed Fe 3 O 4 @TiO 2 /Ag nanocomposite exhibits excellent photocatalytic efficiency, magnetic recoverability, and long-term stability, highlighting its potential for practical applications in mitigating microplastic pollution.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-10
·
IF 5.3
Zhai Xiurong,Li Qian,Cao Yang,Han Mengjie,Sun Hailian,Du Lelin,Yang Xiyun,Wei Yuxin,Yu Congcong
An electrochemical platform for signal amplification probing chloride ions (Cl − ) is constructed by the composite integrating core–shell structured nitrogen-doped porous carbon@Ag-based metal–organic frameworks (NC@Ag-MOF) with polypyrrole (PPy). It is based on the signal of solid-state AgCl derived from Ag-MOF, since both NC and PPy have good electrical conductivity and promote the electron transport capacity of solid-state AgCl. NC@Ag-MOF was firstly synthesized with NC as the scaffold and then, PPy was anchored on NC@Ag-MOF by chemical polymerization. The composite NC@Ag-MOF-PPy was utilized to modify the electrode, which exhibited a higher peak current and lower peak potential during Ag oxidation compared with those of Ag-MOF and NC@Ag-MOF-modified electrodes. More importantly, in the coexistence of chloride (Cl − ) ions in solution, the NC@Ag-MOF-PPy-modified electrode displayed a fairly stable and sharp peak of solid-state AgCl with the peak potentials gradually approaching zero, which might effectively overcome the background interference caused by electroactive substances. The oxidation peak currents of solid-state AgCl increased linearly with the concentration of Cl − ions in a broad range of 0.15 µM–40 mM and 40–250 mM, with detection limits of 0.10 µM and 40 mM, respectively. The practical applicability for Cl − ions determination was demonstrated using human serum and urine samples. The results suggest that NC@Ag-MOF-PPy composite could be a promising candidate for the construction of the electrochemical sensor.
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WATER RESEARCH
·
2024
·
IF 11.4
Yuyang Yao,Yueyue Lu,Jingwen Xu,Jiacheng Yu,Liang Guo,Heda Ding,Jian Li,Junbin Liao,Edison Huixiang Ang,Zhenlu Shen,Jiangnan Shen
Membrane-contamination during electrodialysis (ED) process is still a non-negligible challenge, while irreversible consumption and unsustainability have become the main bottlenecks limiting the improvement of anion exchange membranes (AEMs) anti-contamination activity. Here, we introduce a novel approach to design AEMs by chemically assembling 4-pyndinepropanol with bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) in an electrochromic-inspired process. Subsequently, the co-mingled TiO 2 @Ag nanosheet with the casting-solution were sprayed onto the surface of the substrate membrane to create a micrometer-thick interfacial layer. The addition of Ag nanoparticles (NPs) enhances the active sites of TiO 2 , resulting in stronger local surface plasmon resonance (LSPR) effects and reducing its energy band gap limitation (From 3.11 to 2.63 eV). Post-electrodialysis electrochromic AEMs incorporating TiO 2 @Ag exhibit synergistic enhancement of sunlight absorption, effectively suppressing photogenerated carrier binding and promoting migration. These resultant-membranes demonstrate significantly improved bacterial inhibition properties (42.0-fold increase for E. coli ) and degradation activity (7.59-fold increase for rhodamine B) compared to pure TiO 2 membranes. Importantly, they maintain photocatalytic activity without compromising salt-separation performance or stability, as the spraying process utilizes the same substrate materials. This approach to rational design and regulation of anti-contamination AEMs offers new insights into the collaborative synergy of color-changing and photocatalytic materials.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Tianna Wu,Shuo Yang,Wei Feng,Kaiyue Li,Yanru Li,Lili Wang,Rui Chen,Xiaodong Yang,Lulu Liu,Donglai Han
Equipped with surface-enhanced Raman scattering (SERS) effect and magnetic manipulation capacity, a new paradigm of recyclable SERS substrates based on Fe 3 O 4 nanoparticles (NPs) @SiO 2 @PEI-DTC adhesive layer @Au-Ag alloy quantum dots (QDs) were successfully prepared via engineering hydrothermal and seed deposition techniques. The SERS performance and uniformity of those substrates with different gold-silver (Au-Ag) weight ratios were evaluated by 4-aminothiophenol (4-ATP) molecules, revealing that the relative standard deviations (RSDs) of all substrates were less than 12 %, with the optimal SERS substrate achieving an enhancement factor (EF) of up to 1.39 × 10 5 . This phenomenon can be attributed to the magnetic core and plasmonic resonance properties of Au-Ag alloy QDs, which result in abundant interparticle hotspots in the Fe 3 O 4 @SiO 2 @PEI-DTC@Au-Ag (FSPAA) nanocomposites. Furthermore, the optimal FSPAA nanocomposite was employed as a SERS substrate for rapid non-destructive detection of thiram on fruit surfaces. The SERS signal intensity exhibited a robust manifesting a linear association with thiram concentration within the span of 1 × 10 −4 to 1 × 10 −9 M, and the minimal detectable concentration was 1.04 × 10 −10 M. The FSPAA core–shell nanocomposites exhibit high reusability and reliability and hold great promise for the practical applications in on-site assessment of food/environmental safety, as well as in spectroscopic identification of molecules adsorbed onto fruit surfaces.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Jiahao Pan,Yuchen Zhang,Zhentao Pang,Yu Deng,Zhenda Lu
This work presents a high-content platform for investigating the critical interplay between the nanoparticle cluster size, structure, and plasmon-enhanced fluorescence at a single particle level. The platform enables the controlled assembly of pre-synthesized, bio-conjugatable Ag@Au nanocubes into clusters with varying sizes and configurations, ultimately arranged in an array pattern. Notably, the platform statistically reveals that Ag@Au nanocubes achieve over two orders of magnitude greater fluorescence enhancement compared to Au nanoparticles alone. Moreover, it identifies a crucial size regime for maximizing fluorescence enhancement. Clusters containing 1–4 nanocubes exhibit a direct correlation between the fluorescence intensity and the number of particles, as well as cluster configuration. Compact clusters display a significantly stronger fluorescence response compared to loosely packed configurations. This high-content platform offers a powerful approach for the rapid, simultaneous characterization of multiple nanoparticles, paving the way for efficient, large-scale fluorescence-based detection.
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危险品化学品经营许可证（带存储）