JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Chao Luo,Tianpei Yi,Bin Du,Zhijie Yuan,Fusheng Pan,Zhongyi Jiang
Aromatic and alkane separation plays a vital role in naphtha steam cracking due to the low cracking reactivity of aromatic. Aromatic-friendly hybrid membrane-based pervaporation is recognized as an efficient separation technology attributed to its economy, simplicity, and eco-friendly. Thus, TpPa-SO 3 Ag, a two-dimension COF filler with great compatibility for Pebax, was designed with uniform anchoring of Ag + in pore, which was incorporated into Pebax to construct facilitated transport channel into Pebax-TpPa-SO 3 Ag membrane. By regulating TpPa-SO 3 Ag content, the optimal Pebax-TpPa-SO 3 Ag membrane (1.0 wt%) showed best pervaporation performance with permeation flux of 2.05 kg m −2 h −1 and separation factor of 6.26 over 168 h. Relying on the optimal formulation of flat sheet membrane, hollow fiber hybrid membrane was developed, whose permeation flux (0.43 kg m −2 h −1 ) and separation factor (7.25) was fully maintained during the 168 h continuous pervaporation process for toluene/ n -heptane mixture, opening an avenue for hollow fiber COF hybrid membrane-based pervaporation in the production of high-value petrochemical derivatives.
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高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Shengyao Zhou,Ming Zheng,Meiyue Cheng
The electrocatalytic CO 2 reduction reaction (CO 2 RR) using renewable electricity emerges as a promising route for carbon neutralization, which has attracted numerous attentions in recent years. Regulating the micro-environment surrounding the reaction interface is of great importance for selective CO 2 electroreduction but remains challenging. This study employed the potassium chloride (KCl) electrolyte to regulate the micro-environment surrounding the silver nanowires (AgNWs) catalyst for efficient electrocatalytic CO 2 -to-CO conversion. Rather than focusing on the effect of individual anions or cations in CO 2 RR, as previously reviewed elsewhere, we herein elucidated the effect of both Cl − and K + on the micro-environment surrounding the active centers. Experimental results and DFT calculations revealed that K + could facilitate the CO 2 adsorption and activation, while Cl − could promote *COOH formation and suppress HER. Findings from this study may provide new insights into the micro-environment engineering for efficient CO 2 RR.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qian-Qian Li,Yang Li,Heng Mao,Yan-Mei Zhang,Qiu-Ying Zhang,Xin-Ru Chen,Zi-Cong Shan,Xian-Zhe Zhou,Li-Hao Xu,Zhi-Ping Zhao
Mixed matrix membranes (MMMs) have emerged as a critical platform for molecular separation, especially carbon capture from point-emission sources. In this study, a series of novel MMMs were fabricated by incorporating the bimetallic Ag/Zn-ZIF-8 nanoparticles into the poly (ether-block-amide) (Pebax) matrix for efficient CO 2 /N 2 separation. The SEM, EDS, XRD, FTIR, XPS, TGA, N 2 adsorption-desorption measurements were employed to elucidate the microstructures and physicochemical properties of the resultant nanoparticles and membranes. The bimetallic coordination-induced optimization modulated the inherent structure of ZIF-8 framework and enhanced CO 2 affinity, thereby forming the CO 2 -selective transport channels over N 2 . The incorporation of Ag + promoted the uniform dispersion of Ag/Zn-ZIF-8 nanoparticles in Pebax matrix, indicating the excellent polymer-filler interfacial compatibility. Impressively, the resulting membrane achieved the superior separation performance with a CO 2 permeability of 359 Barrer and a CO 2 /N 2 selectivity of 53, which were 2.5 and 1.4 times higher than that of the pristine Pebax membrane. Besides, the introduction of Ag/Zn-ZIF-8 nanoparticles enhanced the thermal and mechanical stability of the membrane, ensuring the potential for long-term operation. These findings herein advance the rational design and preparation of high-performance MMMs for sustainable carbon capture.
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INFRARED PHYSICS & TECHNOLOGY
·
2025
·
IF 3.4
Tingzhen Chen,Quanjiang Lv,Siwei Liu,Haigang Hou,Guiwu Liu,Junlin Liu,Guanjun Qiao
The advancement of infrared-visible compatible stealth materials is pivotal for strengthening national defense security and driving the next frontier in stealth material technologies. Here, we propose a modification strategy for Al/porous SiO 2 (Al/p-SiO 2 ) composite films by incorporating Ag particles to modulate their spectral response, thereby achieving infrared-visible compatible stealth. The most outstanding Al/p-SiO 2 /Ag-20 exhibits excellent thermal stability, with emissivity of 0.27 in the mid-wave infrared (3-5 μm) and 0.19 in the long-wave infrared (8-14 μm) bands. In addition, compared with Al/p-SiO 2 , its visible reflectivity is reduced by 0.35, reaching as low as 0.38 (380-780 nm). To meet diverse application requirements, flexible and patterned Al/p-SiO 2 /Ag-20 composite film was fabricated, exhibiting excellent stealth performance, particularly suitable for wearable devices and fabrics. It is worth mentioning that the fabrication of Al/p-SiO 2 /Ag composite films only requires a simple, low-cost and scalable process, which provides a solid foundation for large-scale application of infrared-visible compatible stealth materials.
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NANOTECHNOLOGY
·
2019
·Vol. 31
·期 11
·115501
·
IF 3.399
Chenhuinan Wei,ChenXia Kang,Qiming Liu
Cu nanowire (Cu NW) and Ag nanosheet (Ag NS) bimetallic nanocomposites were fabricated on a flexible polyethylene terephthalate (PET) slice for non-enzymatic glucose sensing via a facile two-step approach, vacuum filtration, and galvanic displacement. Low-cost Cu NW-based conductive films were employed as the conductive substrates to substitute the traditional glassy carbon electrodes or indium tin oxide electrodes. The highly stable Ag NSs grow directly on the surface of Cu NWs without additional binders. The AgNO3 concentration and displacement time were adjusted to control the consumption of Cu NWs and the growth of Ag nanostructures. With the large load of Ag and the great connection of Cu NWs, a high sensitivity of 2033 μA mM−1cm−2, a fast amperometric response of 2 s, a wide linear range of 0.0015–4.02 mM, and a satisfactory result in human serum analysis were obtained by this novel Ag NS/Cu NW/PET sensor. Especially the sensitivity of the sensor was over four-fold higher than that of pure Cu NWs/PET, benefiting from the synergistic effect of bimetals. Furthermore, the Ag NS/Cu NW/PET sensor demonstrated a stable amperometric signal against mechanical bending. The material holds promise to use to fabricate flexible electrochemical devices.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Rongchuang Geng,Hanxiao Tang,Qiujuan Ma,Luping Liu,Weisheng Feng,Zhijuan Zhang
In this work, a series of bimetallic Ag/Zn-ZIF-8 materials were successfully developed for sensing toward traces of Fe 3+ and Cu 2+ . The bimetallic Ag/Zn-ZIF-8 was synthesized via a one-pot method. Interestingly, this obtained bimetal Ag/Zn-ZIF-8 exhibited high photoluminescence property and excellent fluorescence quenching response to target analytes with high selectivity , sensitivity and detection limits of 3.9 μM for Fe 3+ , 6.7 μM for Cu 2+ ions, respectively, both of which have been confirmed to be very comparable or better than the reported LMOFs sensors. The possible photoluminescence quenching mechanisms were studied in detail, revealing that the competitive absorption of excitation source and resonance energy transfer (RET) resulted from the host (imidazole of the framework, Lewis basic sites)-guest (metal ions of Cu 2+ and Fe 3+ , Lewis acid sites) interaction should be responsible for high efficiency fluorescence quenching. The binding energies of metal ions adsorption on the ZIF-8 obtained by DFT simulation were further performed to explain the higher quenching effect of Fe 3+ than Cu 2+ .
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KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Peng Cheng Ruan,Hai Feng Chen,Jing Ling Hu,Jian Qiang Ye
Using Bi (NO3)3•5H2O, NH4VO3 as raw material and AgNO3, the Ag/BiVO4 were successfully prepared by a low-temperature solid-phase reaction. And Ag/BiVO4 samples were characterized by X-ray diffraction (XRD), Differential thermal analysis (DTA) and UV - visible diffuse reflectance spectroscopy (DRS). The Methyl Orange (MO) was simulated as the sewage under the visible light to study the influence of the illumination time and the amount of photocatalyst. The visible-light absorption scopes of BiVO4 were broaden by doping Ag, the UV-Visible absorption edge were slightly red shifted and the band gap was narrower comparing with the pure BiVO4. It was found that the catalytic effect of the Ag doped catalysts enhanced under the visible-light irradiation. And the cause of the enhanced catalytic effect also has been analyzed and discussed in the article.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 8
·082501
·
IF 3.3
L. P. Zheng,F. F. Huang,J. Ren,M. L. Huang
A ternary additive system (morin, cinnamaldehyde, and cuminaldehyde) was developed to fabricate Sn-Ag bumps with high flatness (<5%) and coplanarity (<5%) under high-current-density electrodeposition (8 ASD). Cyclic voltammetry revealed distinct potential-dependent adsorption behavior: morin preferentially adsorbed at relative positive potentials (−0.44 to −0.60 V), inducing −160 mV shift in onset electrodeposition potential (−0.60 V) compared to that without additives (−0.44 V), which enhanced nucleation site density and promoted grain refinement. In contrast, cinnamaldehyde and cuminaldehyde adsorbed predominantly at more negative potentials (−0.50 to −0.80 V and −0.55 to −0.80 V, respectively). This enabled their adsorption at the edge and tip of bumps, thereby achieving leveling effects by selectively suppressing deposition at protrusions. Convective diffusion amplified the cinnamaldehyde adsorption at the edge and tip while suppressing cuminaldehyde adsorption. Chronopotentiometric analyses further elucidated the synergistic regulation mechanism. At 8 ASD, the adsorption of morin shifted the electrodeposition potential negatively, enabling subsequent adsorption of cinnamaldehyde and cuminaldehyde. Consequently, electrodeposition at relative negative potentials and rapid diffusion regions was suppressed, yielding fine-grained structures alongside superior flatness and coplanarity.
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TALANTA
·
2025
·
IF 6.1
Chenghao Lin,Qianyi Li,Gengliang Liu,Zixuan Xi,Xiaoxia Yan,Shijun Li,Liang He,Pengli Bai
Alzheimer’s Disease (AD), a most common neurodegenerative disease, has aroused people's great attention. Amyloid-β 1-42 (Aβ42) from serum/plasma has been listed as Core 1 biomarker in diagnostic guide and explore an ultrasensitive detection method of Aβ42 is of great significance for early AD diagnosis and treatment. Herein, an ultrasensitive fluorescent biosensor for Aβ42 detection is designed, which is composed of Fe 3 O 4 @MoS 2 microsphere and Au-Ag alloy. Compared with typical single gold nanoparticles in traditional fluorescent biosensor, alloy nanoparticles can generate a stronger electromagnetic field to enhance the fluorescence of quantum dots via surface plasmon resonance, achieve the effect of signal amplification. Importantly, our design significantly improved the limit of detection to 11 ag/mL, with a linear response ranging from 0.1 to 10 4 fg/mL. Moreover, by replacing the detection antibody in the biosensor, it can also be applied to other common AD biomarkers, such as Aβ40 (linear range: 0.1 to 10 5 fg/mL, LOD: 61 ag/mL) and total Tau protein (linear range: 0.1 to 10 5 fg/mL, LOD: 40 ag/mL). The biosensor exhibited excellent performance in both spiked and real serum samples. This fluorescent biosensor based on Au-Ag alloy strategy with ultra-sensitivity and good selectivity, provides a reliable solution for AD’s early diagnosis.
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CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Chao Duan,Jingru Meng,Xinqi Wang,Xin Meng,Xiaole Sun,Yongjian Xu,Wei Zhao,Yonghao Ni
A novel cellulose-based antibacterial material, namely silver nanoparticles@ metal-organic frameworks@ carboxymethylated fibers composites (Ag NPs@ HKUST-1@ CFs), was synthesized. The results showed that the metal-organic frameworks (HKUST-1) were uniformly anchored on the fiber’s surfaces by virtue of complexation between copper ions in HKUST-1 and carboxyl groups on the carboxymethylated fibers (CFs). The silver nanoparticles (Ag NPs) were immobilized and well-dispersed into the pores and/or onto the surfaces of HKUST-1 via in situ microwave reduction, resulting in the formation of novel Ag NPs@ HKUST-1@ CFs composites. The antibacterial assays showed that the as-prepared composites exhibited a much higher antibacterial activity than Ag NPs@ CFs or HKUST-1@ CFs samples.
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高影响因子
Biomaterials Science
·
2022
·Vol. 10
·期 5
·1281-1291
·
IF 7.59
Yanan Wang,Zikang Xu,Wenchi Li,Wei Wei,Mengqi Qin,Qun Li,Xuexia Liu,Xu Zhang,Xiaolei Wang
Excessive fibrosis is the major factor in the failure of glaucoma filtration surgery. So far, the dominant approach for inhibiting fibrosis is the use of an antimetabolite drug, but the complications it causes, such as filtering bleb leakage, bacterial endophthalmitis and ocular hypotony, are also inevitable. Herein, a multifunctional anti-scarring platform (PVA@rGO-Ag/5-Fu) integrated with outstanding photothermal, antibacterial and drug delivery abilities is developed. PVA@rGO-Ag shows favorable biocompatibility as well as an accurate regional photothermal killing ability on both conjunctival fibroblasts and bacteria under 808 nm near-infrared (NIR) irradiation. Furthermore, PVA@rGO-Ag/5-Fu improves bleb survival rates and results in the satisfactory reduction of intraocular pressure (IOP) by decreasing the fibrous reaction in vivo. In summary, PVA@rGO-Ag/5-Fu has promising potential as an efficacious and safe anti-scarring agent for filtering surgery.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2015
·Vol. 75
·期 3
·680-692
·
IF 1.532
Wang Zhen-Zhen,Zhai Shang-Ru,Zhai Bin,An Qing-Da,Li Shao-Wei
Abstract
A novel core–shell-structured Ag-based magnetic functional polymer nanocatalyst, i.e., Fe 3 O 4 @SN/GLA@chitosan-Ag (SN represents animo-functionalized SiO 2 , GLA signifies glutaraldehyde), was fabricated via a simple and environmentally friendly method. The magnetic separation property of Fe 3 O 4 , the protection effects of SiO 2 , the reduction and stabilization activities of chitosan, and the catalytic property of Ag nanoparticles (NPs) in the multifunctional catalyst system were efficiently combined using glutaraldehyde as bridging agent. The Ag NPs with average diameter about 2–11 nm were generated in situ and stabilized by chitosan, which acted as reducing agent and stabilizer in the absence of other potentially toxic reagents. Furthermore, the reduction, chelation ability of chitosan, and the size of Ag NPs were found to be tunable, thereby enabling the preparation of other noble metal catalysts with tailored properties. Most importantly, the as-prepared catalyst exhibited superior catalytic performance (the reduction reaction was finished within 3 min) and reusability (reusable for at least six times) in the reduction of 4-nitrophenol. Graphical Abstract
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危险品化学品经营许可证（带存储）