ACS Applied Polymer Materials
·
2024
·
IF 4.4
Shuolei Wang,Wenjun Wang,Zhonggui Zhang,Xiaojian Jiang,Ziyue Zhang,Hongyu Gao,Shi Xu,MD Zahidul Islam,Yaofeng Zhu,Yaqin Fu,Qingqing Ni,Yubing Dong
In this study, we developed composite fibers composed of silver (Ag)/boron nitride (BN)/ethylene-vinyl acetate copolymer (EVA) utilizing a combination of melt spinning–UV irradiation and chemical Ag-plating techniques. The inclusion of the BN filler was aimed to enhance the thermal conductivity and accelerate the response of EVA, while the application of a nano-Ag coating provided the fiber with high electrical conductivity. The results indicated that the electrical conductivity of the Ag/BN/EVA composite fiber achieved a notable value of 2.47 × 104 S/m. These composite fibers exhibited exceptional two-way shape memory properties, electrothermal conversion characteristics, and electrically driven actuation capabilities. Significantly, we demonstrated that by applying a voltage of merely 2.5 V, it was possible to precisely control the electrically reversible driving strain of the Ag/BN/EVA composite yarn by adjusting the energization time, resulting in an impressive energy density of 99.96 J/kg under a loaded weight (34.50 g), which is approximately 4107 times its own weight (0.0084 g). This led to the development of a composite yarn artificial muscle with a high load-bearing capacity, remarkable energy density, and low driving voltage requirements.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Xinru Wang,Qiuxu Chen,Daming Yang,Ying Li,Dongxu Yin,Baoxin Ni,Wei Lu,Guiru Sun,Ming Feng
Photo-assisted electrochemical strategy has garnered interest for its ability to diminish the large overpotential of lithium-oxygen batteries (LOBs). Nonetheless, creating a sophisticated photocatalyst capable of absorbing a wide spectrum of light and dramatically lowering the recombination rate for electron-hole pairs presents a significant challenge. Herein, we design an Ag-doped ZnO (Ag@ZnO) hollow nanosphere as photocatalysts to boost the reaction dynamics of photo-assisted LOBs. The Ag@ZnO hollow nanospheres, featuring a mesoporous structure, are beneficial for improving O 2 transport and enabling the retention of discharge products. Additionally, the ability to absorb light and the efficiencies of electron-hole separation are enhanced for Ag@ZnO as a result of Ag doping. The electrons generated by photoexcitation facilitate the conversion of O 2 to produce Li 2 O 2 during discharge, whereas during charging, the presence of holes causes the decomposition of Li 2 O 2 . Consequently, a significantly low overpotential of 0.22 V, ultrahigh cycling efficiency of 93.73%, and good reversibility was achieved for the photo-assisted LOBs using Ag@ZnO. We consider that this work can offer a reliable strategy to improve electrochemical kinetics and contribute to the development of efficient photocatalysts for photo-assisted LOBs.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Peilin Wu,Jiwen Fan,Yunze Tai,Xun He,Dongdong Zheng,Yongchao Yao,Shengjun Sun,Binwu Ying,Yao Luo,Wenchuang Hu,Xuping Sun,Yi Li
Developing an accurate, cost-effective, reliable, and stable glucose detection sensor for the food industry poses a significant yet challenging endeavor. Herein, we present a silver nanoparticle-decorated titanium dioxide nanoribbon array on titanium plate (Ag@TiO 2 /TP) as an efficient electrode for non-enzymatic glucose detection in alkaline environments. Electrochemical evaluations of the Ag@TiO 2 /TP electrode reveal a broad linear response range (0.001 mM - 4 mM), high sensitivity (19,106 and 4264 μA mM −1 cm −2 ), rapid response time (6 s), and a notably low detection limit (0.18 μM, S/N = 3). Moreover, its efficacy in measuring glucose in beverage samples shows its practical applicability. The impressive performance and structural benefits of the Ag@TiO 2 /TP electrode highlight its potential in advancing electrochemical sensors for small molecule detection.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yuting Li,Jiaming Song,Xin Zhao,Bingda Li,Zhuo Wang,Juanjuan Yang,Guoshuai Ban,Feng Teng,Jialong Ma,Chaoying Meng,Honggang Ye,Guangde Chen,Zhonghua Dai,Yu Cong
With increasing environmental pollution, the utilization of green techniques, such as photocatalysis, is required to degrade harmful sources without secondary pollution. In this study, we synthesized an efficient photocatalyst, i.e., a h-BN/BiPO4 heterostructure modified by Ag nanoparticles at the interface (Ag/BN/BPO) by photodeposition and a hydrothermal method, and investigated photocatalytic degradation performance for rhodamine B dye (RhB). It was found that 95% of RhB was removed by Ag/BN/BPO (optimal ratio) after 60 min of light exposure. Compared to BiPO4 and BN/BiPO4, the removal efficiency was improved by 50 and 30%, respectively. The high photocatalytic degradation activity of Ag/BN/BPO could be possibly attributed to the synergistic effect of the improved separation efficiency of electron–hole pairs by the special heterostructure design and the increased adsorption capacity due to the large specific surface area of the layered h-BN. This study provided a possible route for the development of highly efficient photocatalysts for the degradation of organic pollutants.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ruyue Cong,Kaiyue Hu,Dandan Hu,Jingran Sun,Jinglu Yao,Zhiyong Guo,Sui Wang,Yufang Hu
The detection of UDG activity is essential for understanding DNA damage repair mechanisms, assessing cellular genetic stability, and advancing diagnostics and treatments for related diseases. An advanced electrochemical biosensor based on a silver-enhanced copper metal–organic framework (Ag@Cu-MOF) has been developed for the sensitive and selective detection of uracil-DNA glycosylase (UDG) activity in cellular environments. This design incorporates a prism substrate to stabilize the liquid phase on the electrode surface, with DNA probes immobilized on the prism surface. Upon UDG-catalyzed uracil excision, the probe undergoes structural changes, initiating a cascade reaction. The abundance of free DNA ends facilitates the approach of MOF materials to the electrode interface, creating a stable environment conducive to H 2 O 2 reduction, thereby amplifying the electrochemical signal. Comparative catalytic analyses revealed that the Ag@Cu-MOF-modified electrode, with its enhanced conductivity and high surface area, achieved efficient catalysis compared to Cu-MOF. The biosensor exhibited a linear response to UDG concentrations ranging from 0.00002 to 0.5 U/mL, with an impressively low detection limit of 0.00002 U/mL, highlighting its capability for quantitative analysis. The sensor demonstrated high selectivity, minimal interference from other biomolecules, and stable performance across multiple cycles, underscoring its robustness. Furthermore, UDG activity was successfully detected at varying cell densities and under hypoxic conditions, providing valuable insights into cellular DNA repair mechanisms and responses to stress. In summary, the Ag@Cu-MOF-based biosensor offers a promising platform for detecting UDG activity in cancer diagnostics and cellular research, with potential applications in monitoring DNA repair activities under both physiological and pathological conditions.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 2
·e70106
·
IF 3.4
Jingbo Shen,Yakai Feng
Thermal interface materials are crucial for the thermal management of modern electronic devices. The thermal conductivity of polymer-based composites, as the widely used thermal interface materials, is still limited by the high interfacial thermal resistance between the polymer matrix and the filler. Herein, pitch-based carbon fibers co-modified with silane coupling agent and Ag nanoparticles were developed and used as thermally conductive fillers to prepare silicone composites with the purpose of improving interfacial compatibility and reducing interfacial thermal resistance. Under scanning electron microscope observation, the modified carbon fibers dispersed uniformly, and they were adhered to by a number of Ag nanoparticles. The thermal conductivity of the silicone composite with a 20 wt% filling amount of modified carbon fibers reached up to 1.624 W m −1 K −1 , which was 1.46 times higher than that of the unmodified carbon fiber filled silicone composite. The silicone composite with a 20 wt% filling amount of modified carbon fibers also exhibited a relatively high heat transfer rate and excellent mechanical properties. The electrical insulation and dielectric properties of silicone composites filled with modified carbon fibers also satisfied the requirements for the use of thermal interface materials. This approach provided an effective strategy for the development of thermal interface materials with high thermal conductivity in the thermal management field.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Ling-Ling Wang,Lei Bian,Hao Tian,Shi-Ze Liu,Ke-Xin Li,Xin Wang,Zhong-Li Wang
Electrochemical CO 2 reduction in acidic electrolyte is a potential strategy for efficient CO 2 utilization by preventing the formation of carbonate, but it remains a great challenge to improve the selectivity of CO 2 reduction in acidic electrolytes due to the competitive hydrogen evolution reaction . Herein, we demonstrate Ag 2 CrO 4 derived Ag–Cr 2 O 3 composite catalyst with local alkaline microenvironments for enhanced selectivity of CO 2 to CO product in an acidic KCl electrolyte. Under the electrochemical reduction of CO 2 , the Ag 2 CrO 4 pre-catalyst undergoes a chemical transformation induced by chloride ions to generate AgCl–Cr 2 O 3 , meanwhile, AgCl is electrochemically reduced Ag to form a Cr 2 O 3 coated Ag composite catalyst with rich Ag–Cr 2 O 3 interfaces. The Ag–Cr 2 O 3 gas diffusion electrode constructed from carbon nanopowder effectively increases the hydrophobicity of the electrode, and the optimized electrode exhibits high CO Faradaic efficiency (FE) (over 75%) at a wide current density of 50–300 mA cm -2 and achieves a maximum FE of 86.7% toward CO product at 300 mA cm -2 . The in situ Raman spectroscopy reveals that Cr 2 O 3 can adsorb OH − which regulates the local alkaline environment to promote the CO 2 adsorption on the Ag–Cr 2 O 3 interface and stabilize the *CO 2 - /*COOH intermediates in the acidic electrolyte. This work provides an effective strategy to tune the reaction interfaces for CO 2 reduction in acidic electrolytes.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 15
·5615-5622
·
IF 5.7
Qianrong Jin,Jinrong Shi,Jianwei Jin,Wenli Xu,Suqin Chen,Yuexiao Pan
Efficient and versatile materials that are both non-toxic and environmentally sustainable have become paramount in our pursuit of greener and more durable illumination solutions. In this study, we investigated the optical properties of rare-earth-based all-inorganic perovskite (AIP) crystal Cs2NaGdCl6 (CNGC) with various substitutions to explore its potential applications in lighting devices. The primitive crystal CNGC exhibits intrinsic blue emission due to its self-trapped excitons (STEs) but singly-doping with Bi3+ ions results in weak blue emission, indicating quenching of the STE emission. Alloying by introducing Ag+ ions into the CNGC:Bi3+ lattice, replacing the Na+ ions, caused the disruption of the crystal field symmetry, which lifts the parity-forbidden selection rule and allows for s–p transitions of the Bi3+ ions. Thus, the co-doping with Ag+ ions in addition to Bi3+ leads to intense broad-band warm white emission covering a wide spectral range of 470–800 nm, with a correlated color temperature (CCT) of 4512 K and a color rendering index (CRI) of 79. The findings from this study provide valuable insights for the development of efficient and high-quality lighting devices using a simple technique.
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Polymers
·
2017
·Vol. 9
·期 11
·568
·
IF 3.364
Guo Lin,Shixing Wang,Libo Zhang,Tu Hu,Jinhui Peng,Song Cheng,Likang Fu
A new cyanuric-thiosemicarbazid (TSC-CC) chelating resin was synthesized and employed to selectively adsorb Ag+from acid solutions. The effects of acid concentration, initial concentration of Ag+, contact time and coexisting ions were investigated. The optimal acid concentration was 0.5 mol/L. The adsorption capacity of Ag+reached 872.63 mg/g at acid concentration of 0.5 mol/L. The adsorption isotherm was fitted well with the Langmuir isotherm model and the kinetic data preferably followed the pseudo-second order model. The chelating resin showed a good selectivity for the Ag+adsorption from acid solutions. Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy/energy dispersive spectrometer (SEM-EDS) and X-ray photoelectron spectroscopy (XPS) were used to study the adsorption mechanism. The chelating and ionic interaction was mainly adsorption mechanism. The adsorbent presents a great potential in selective recovery Ag+from acid solutions due to the advantage of high adsorption capacity and adapting strongly acidic condition. The recyclability indicated that the (TSC-CC) resin had a good stability and can be recycled as a promising agent for removal of Ag+.Keywords:chelating resin;silver ions;selectivity;adsorption;mechanism
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Shiling Zhao,Kaizhi Wang,Shaoqi Mao,Beibei Yang,Yu Zhao
In the pursuit of high-selective oxidation of 5-hydroxymethylfurfural (HMF) to valuable derivatives such as 5-hydroxymethylfuroic acid (HMFCA), 5-formyl-2-furanoic acid (FFCA), and furan-2,5-dicarboxylic acid (FDCA), we have developed a diethylenetriamine pentaacetic acid (DTPA)-assisted strategy to construct a highly effective photothermal catalyst with maximized Ag–CeO2 interfaces and rich oxygen vacancies. Under optimal reaction conditions, this catalyst achieves remarkable yields of 99% for HMFCA, 99% for FFCA with a turnover frequency (TOF) of 163 h–1, and 98% for FDCA. Combined theoretical calculations and a series of characterization analyses reveal that the superior performance is due to the unique properties of the maximized Ag–CeO2 interfaces and the rich oxygen vacancies, which enhance electron transport and synergistically enhance the catalytic activity of silver clusters. In contrast to other photocatalytic oxidation systems for HMF, this work showcases high selectivity in the oxidation of HMF to HMFCA, FFCA, and FDCA. These findings not only elucidate the mechanisms behind selective oxidation but also offer a promising approach for the directional photosynthesis of high-purity chemicals in related applications.
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DESALINATION
·
2024
·
IF 8.3
Yichi Liu,Yi Liu,Wenjing Chen,Xiaowu Hu,Yinshui He,Yan Ma,Yuqiong Xie,Wenxing Luo,Lixiang Luo,Lan Jiang,Xiongxin Jiang,Qinglin Li
CdS has been shown to be an excellent photon trap with strong absorption of light at visible and near-infrared wavelengths. The use of CdS for phase change material (PCM) modification can significantly improve its photothermal conversion performance. However, due to the unique energy band structure of CdS, the difficulty in electron conduction leads to poor thermal conductivity . This problem can be improved by introducing high thermal conductivity nanometals for modification, however, the effective combination of CdS and nanometals has been challenging. In this study, a new preparation strategy is demonstrated, in which Ag nanoparticles (NPs) with similar lattice parameters and crystalline coordination to CdS is first introduced on the surface of carbonized melamine foam (CMF), followed by the introduction of CdS NPs. This similar structure helps to form a better interfacial bond between CdS and Ag. The resulting stabilized structure enables the composite phase change material (CPCM) to achieve 96.1 % PEG loading with an ultra-high photothermal conversion efficiency of 94.6 %, thermal conductivity of 0.61 W/m∙K, and excellent antimicrobial activity. This study provides valuable guidance for the engineering design of CPCM with high photothermal conversion performance and suggests its practical application value in seawater evaporation and thermal management of medical devices .
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Hao-Jia Qin,Shuai Zhao,Hua-Ping Gong,Zhi Yu,Yufeng Wang,De Zhang,Pei Liang
Antibiotic residue detection plays a key role in ensuring human health. However, rapid, reliable, and highly sensitive detection methods are still insufficient. To tackle this challenge, in this study, the Au@Ag/Ce-UIO-66, a nanocomposite material consisting of bimetallic gold core and silver shell (Au@Ag) introduced on the surface of Ce-UIO-66, was successfully synthesized. By meticulously regulating the exact concentration and volume of silver nitrate, we successfully generated an optimal matrix. This significantly enhanced the detection capability of the probe molecule CV to an impressive concentration of 10 −9 M, with a remarkably low relative standard deviation of 7.54 %. The matrix exhibits excellent surface-enhanced Raman scattering (SERS) performance and stability, reaching adsorption equilibrium within 30 min. Moreover, employing this substrate enables the detection of sulfadiazine at concentrations as minimal as 2.5 μg/L, significantly surpassing the standards set by the European Union. Notably, the Raman spectral signal of sulfadiazine maintains stability across various pH conditions at a concentration of 10 −5 M. Finally, the adsorption mechanism and enhancement mechanism between Au@Ag/Ce-UIO-66 and sulfadiazine were explored.
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