CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Qingzhao Cai,Chengcheng Jiao,Junhao Wu,Shanqin Ge,Wei Li,Long Chen,Genxiang Gong,Jiamin Yu,Yaokang lv,Jinhong Yu,Kazuhito Nishimura,Nan Jiang,Tao Cai
Hybrid fillers show great advantages in improving the frictional properties of epoxy (EP) composites. However, to date, achieving ultra-low coefficients of friction and wear rates in self-lubricating EP systems through the use of nanofillers remains a challenge. In this study, the hard diamond nanosheets, soft silver nanoparticles, dopamine hydrochloride, and 1H,1H,2H,2H perfluorodecyltrichlorosilane (FDTS) were designed to prepare organofluorinated Ag/2D diamond nanocomposites (NDs-fPDA-Ag NPs). The tribological tests demonstrated that 3 wt% addition of NDs-fPDA-Ag NPs in EP exhibited the best friction reduction and anti-wear properties, which were reduced by 84.3 % and 98.6 % compared with pure EP. Significantly, it stands out as the sole instance reported to date that has successfully achieved the oil lubrication (average coefficient of friction 0.085 less than 0.1) in dry friction while maintaining ultra-low wear rate (4.9 × 10 -6 mm 3 /(N·m)). The superior lubrication effect is primarily attributed to three key factors: the high hardness of the two-dimensional (2D) diamond nanosheets, which provides exceptional wear resistance; the “rolling effect” generated by the zero-dimensional (0D) silver nanoparticles, which significantly reduces the friction coefficient; and the low surface energy of outermost grafted organofluorine compounds, which minimizes interactions between the NDs-fPDA-Ag NPs and the steel friction pair. The soft and hard combination of low surface energy 2D diamond greatly enhances the tribological performance of EP composites and provides a new approach for the preparation of excellent self-lubricating epoxy systems.
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TALANTA
·
2024
·
IF 5.6
Anni Cui,Jialu Zhang,Zhifei Liu,Xin Mu,Xiahua Zhong,Haitao Xu,Guiye Shan
Epinephrine (EP) is a crucial neurotransmitter in the central nervous system. However, an abnormal level of EP in biological fluids can lead to various diseases. Therefore, it is essential to rapidly and accurately detect EP content. Herein, electrically stimulated patterned Au@Ag nanoarrays with laccase-mimicking activity were designed for the dual-mode detection of EP concentration. The patterned Au@Ag nanoarrays exhibit excellent electrochemical properties and electrically stimulated laccase-mimicking activity. They provide sensitive electrochemical responses for detecting EP content. Simultaneously, the Au@Ag nanoarrays can catalyze the oxidation of EP, enabling its detection through a colorimetric process. This dual-mode approach achieves the detection of EP content over a wide linear range of 0.5–200 μM, with a low detection limit of 0.152 μM. Furthermore, the utility of these nanoarrays for sensing EP in human serum was evaluated. This work provides a convenient method using patterned nanozyme array for the visible, rapid and accurate detection of EP content. It provides the important implication for the development of portable and reliable on-site analytical instruments.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhiwei Wang,Yefan Zhou,Junsheng Wang,Yun Wang,Jianwei Zhao,Wenjia Xu,Yuhua Feng
Currently, hybrid noble metal nanostructures have garnered significant interest due to their exceptional properties and diverse applications in fields such as catalysis, energy conversion, plasmonic sensing, and surface-enhanced Raman scattering (SERS). In this work, we report the highly site-specific growth of a single Ag island on both the concave face and the sharp tip of concave Au nanocube (c-AuNC) seeds, resulting in different c-AuNC-Ag Janus heterostructures. This site specificity was achieved by combining the surface curvature effect of the c-AuNCs with strong ligand-mediated interfacial energy control. Further integration of interfacial energy and growth kinetic control led to the formation of c-AuNC-(Ag)n core–satellite structures with varying numbers of Ag satellites. Benefiting from the continuous tunability of the interfacial energy and growth kinetics, the structural evolution of the c-AuNC-Ag hybrid structures continuously occurred, enabling precise control of the Au–Ag bimetallic structures. Notably, the resulting c-AuNC-Ag structures showed tunable intense localized surface plasmon resonance (LSPR) absorptions within the 400–1000 nm wavelength along with strong SERS signals. The broad spectral absorption and strong SERS made the c-AuNC-Ag structures promising candidates for SERS and LSPR-based applications, including sensing, imaging, light energy harvesting, and conversion. Moreover, the effective synthetic control demonstrated in this work could facilitate the development of advanced hybrid metal nanomaterials with valuable properties, further broadening their application potential across various fields.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Zelong Li,Xue Han,Lan Fu,Guochao Shi,Shiqi Xu,Mingli Wang,Wenzhi Yuan,Wenying Zhou,Jiahao Cui
The combination of surface-enhanced Raman scattering (SERS) and machine learning algorithm provides an effective means for the identification of pharmacodynamic substances. This paper reported a biomimetic synthesis route of Ag-30/SiO 2 -4/Cu-20/rice leaf (Ag-30/SiO 2 -4/Cu-20/RL) SERS platform with multiple synergistic electromagnetic enhanced performance. The localized surface plasmon resonance (LSPR) effect was strengthened as the SiO 2 nanolayer generated between Ag and Cu. This SERS platform demonstrated high sensitivity, with a low limit of detection (LOD) of 1 × 10 −10 M for 4-Aminophenylthiophenol (4-ATP) and an enhancement factor (EF) of 3.86 × 10 6 . More importantly, the principal component analysis (PCA) was adopted to analyze the SERS data of three different Traditional Chinese medicine (TCM) pharmacodynamic substances (Orientin, Atractylenolide III and Prim-o-glucosylcimifugin). The K-nearest neighbor (KNN) and Naïve Bayes (NB) achieved classification accuracy of 0.9474 and 0.9649, respectively. The platform provides guidance for the accurate identification of TCM pharmacodynamic substances.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 9
·096505
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IF 3.1
Zhefei Zhao,Linlin Zhang,Minghao Chen,Ruopeng Yu,Xuyao Yao,Yinghua Xu,Youqun Chu,Xinbiao Mao,Huajun Zheng
Electrochemical selective dechlorination can be regarded as one of the most promising strategies for generating high-valued chemicals. In the electrochemical dechlorination process of 2-chloro-5-trichloromethylpyridine (TCMP), except the anticipated dechlorination products involving 2-chloro-5-dichloromethylpyridine (DCMP), 2-chloro-5-chloromethylpyridine (CCMP), and 2-chloro-5-methylpyridine (CMP), some unexpected oxygen-incorporated products (6-chloronicotinic acid (CNA) and 6-chloronicotinoyl methyl ester (MCN)) can be obtained. Consequently, understanding the electrochemical dechlorination behavior of TCMP is crucial. Our research revealed that the activated Ag electrodes in halide ion solution exhibit enhanced electrochemical activities for electrochemical dechlorination of TCMP, compared with the pure Ag owing to the increased active specific surface areas and charge transfer. Second, oxygen participation in the reaction is a necessary condition for the formation of oxygen-incorporated products. A 100% selectivity of oxygen-incorporated products can be obtained at the potential of −0.6 V vs Ag/AgCl. Conversely, insufficient oxygen may lead to the potential becoming the determining condition that affects the reaction pathways. A more negative potential (−1.2 V vs Ag/AgCl) is conducive to the formation of dechlorination products with 94.2% conversion and 100% selectivity. This study, for the first time, elucidates the electrocatalyst, atmosphere, and potential-dependent activity and selectivity for the two dechlorination pathways of TCMP.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Gao Jie,Li Jiahui,Miao Lei,Jia Lida,Qiu Pengfei,Yin Tingwei,Zhu Sijing,Yang Xinyu,Guo Jia-Chen,Chen Jun-Liang,Wang Xiaoyang,Nishibori Eiji,Sato Tomohiro,Shi Xun
β -Ag 2 Se holds a great promise for wearable thermoelectric generators due to its good mechanical properties and biocompatibility. However, optimizing its power factor through alterations in the Ag/Se stoichiometric ratio or incorporating secondary phases has reached the limitation. This work adopts a liquid-like sintering strategy, namely employing the migration and precipitation of silver ions from metallic silver to the silver selenide during the spark plasma sintering process to construct significantly sized and coherent Ag-rich nanoprecipitates within flexible Ag/ β -Ag 2 Se composite films, thereby achieving an unprecedented power factor exceeding 4000 μWm −1 K −2 at 303 K. The Ag-rich nanoprecipitates play a crucial role in elevating the carrier concentration, enhancing the density-of-states effective mass, and mitigating carrier scattering caused by phase interfaces and acoustic phonons. The generator containing 5 pieces of optimal films shows an normalized output power density of 10.89 μWcm −1 K −2 under a temperature difference of 26.0 K. This study strongly suggests that the creation of Ag-rich nanoprecipitates is an effective avenue for improving the electrical performance of β -Ag 2 Se-based thermoelectric materials.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xin Liu,Qunzhi Zhu,Yaping Qian,Wenjing Wu
Access to clean water is a fundamental right for all individuals. However, globally, there are still 2 billion people who lack access to safe drinking water on a daily basis. Solar-driven interfacial evaporation (SDIE) has been widely explored in recent years as an effective and convenient method for desalination. However, the design and fabrication of photothermal evaporators still face challenges such as rational selection of interface materials, optimizing the evaporator preparation process, controlling the production cost, optimizing the thermal management system, and ensuring stability under different environmental conditions. This study employed a simple one-step hydrothermal and vacuum freezing method to prepare an aerogel with a synergistic effect for photothermal conversion. By doping the semiconductor ZnO into the Ag/GO composite aerogel, light absorption was maximized and efficiently converted into thermal energy, thereby improving overall photothermal conversion efficiency. The prepared ZAGA-1–1 photothermal evaporator achieved an evaporation rate of 3.52 kg m −2 h −1 at 1 kW m −2 with an efficiency of 92.63 %. Additionally, ZAGA-1–1 exhibits excellent hydrophilicity and salt removal ability, while maintaining a stable evaporation rate over 20 cycles. These properties demonstrate the great potential of ZAGA-1–1 for large-scale solar desalination applications.
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SPECTROSCOPY LETTERS
·
2025
·
IF 1.6
Ju Wei,Bingyu Luo,Jiao Fu,Shunli Zhou,E. Li,Xiaodong Su,Xiaotong Gao,Zhenfu Jia,Xiaojiang Li
To overcome the interference caused by the inner filter effect, this study optimally selected red fluorescence carbon dots as the signal source and constructed a novel dual-mode Ag@Red-CDs nanoprobe for the highly selective detection of Fe³+ using fluorescence and colorimetry. This probe is based on a unique reaction between Fe3+ and silver nanoparticles (AgNPs) that weakens the static quenching effect of AgNPs on R-CDs; at the same time, the depletion of AgNPs induces a change in the absorbance of the system. Under optimal conditions, the probe exhibited a linear fluorescence response in the Fe³+ concentration range of 0.10–25.00 μg/mL and a linear colorimetric response of 0.18–8.00 μg/mL. The detection limits for fluorescence and colorimetry were 0.31 μg/mL and 0.56 μg/mL, respectively. In spiked real samples, the fluorescence method achieved Fe³+ recovery rates of 99.10–102.34%, while the colorimetric method showed recovery rates of 99.83–101.42%. Overall, this research significantly broadened the potential applications of R-CDs-based materials for the quantitative detection of heavy metal ions in water bodies.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Weiting Yu,Zhe Yang,Rendan Zhu,Mengzhi Lu,Tingjiang Lu,Yan Yu,Shuang Song
The photo-assisted electrochemical CO 2 reduction reaction (CO 2 RR) toward CO stands as a highly promising pathway for addressing environmental challenges and produces valuable chemicals. In this study, a novel pl-Si/Ag/Pc electrode was developed with the surface enveloped by an amorphous phthalocyanine overlayer. The pl-Si/Ag/Pc electrode has gained recognition as a catalyst of exceptional quality, displaying superior activity, selectivity toward CO, and stability. A synergistic mechanism has been revealed from experimental results that Ag served as active centers for CO 2 RR, Pc facilitated CO 2 adsorption and suppressed the competing HER reaction. Functionalizing the surface of electrode with Pc enhanced the CO selectivity (FE CO at 90.8 % under −1.5 V vs RHE) during the CO 2 RR process and reduced the cost in following product separation procedures. This study presents an uncomplicated yet effective approach for formulating durable and discerning electrocatalysts dedicated to the utilization of CO 2 .
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yilan An,Shiping Cheng,Qiaoling Ding,Dongbo Guan,Yi Hu,Yanli Dou
Flexible sensors are essential for human-machine interfaces and bioinspired intelligent robotics, yet achieving a balance between mechanical robustness and high sensitivity at lower temperatures remains a challenge. Herein, a multifunctional hydrogel sensor (PG 2 /Ag-MOFs-XG) was fabricated through physical crosslinking of polyvinyl alcohol (PVA) and xanthan gum (XG) in glycerol (Gly) and deionized water mixture via freeze-thaw circulation and NaCl crosslinking. The in situ growth of Ag-MOFs on XG molecular chains is facilitated by the electrostatic interactions between the hydroxyl groups and the carboxyl groups of XG and Ag + , restricting molecular chain movement, thereby enhancing comprehensive properties. The PG 2 /Ag-MOFs-XG hydrogel exhibits outstanding mechanical properties across a broad temperature range, with a 101 % increase in tensile strength (from 0.583 MPa to 1.17 MPa) at 25 °C and a 112 % increase (from 0.352 MPa to 0.746 MPa) at −18 °C, compared to the pure PVA hydrogel. Additionally, it demonstrates exceptional sensitivity to stretching (GF = 3.65) and compression (S = 3.38 × 10 −2 kPa −1 ). Furthermore, the hydrogel functions as a flexible sensor for monitoring human motion, assessing industrial robot performance, and detecting the tightness of robotic components. This work offers valuable insights into the development of portable, highly sensitive, and flexible sensors for intelligent robotics.
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JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
·
2025
·Vol. 38
·期 1
·21-27
·
IF 0.7
Rui Hou,Aojie Liu,Chao Lv,Ning Zeng,Zezheng Zhang,Siyi Liu,Qin Li,Akira Watanabe,Gang Jiang,Jinguang Cai
High-conductive ultra-thin metallic wires, as basic structures in electronic devices, are highly demanded but challenging to improve the integration level and miniaturization of the devices. In this study, an efficient laser direct writing approach was proposed and aimed at preparing Ag wires with widths as narrow as 2 μm by irradiating the AgNO3-polymer film with a compact blue-violet laser. A comprehensive exploration of various parameters was conducted, leading to the optimization of Ag wires exhibiting an impressively low resistivity of 2.35×10-7Ω·m. In addition, an Ag wire prepared by laser direct writing on the flexible PEN substrate shows high tolerance to the inward and outward bending, demonstrating excellent flexibility and mechanical stability. On this basis, a UV-light detector based on the laser-irradiated interdigitated Ag patterns and sensitive CdS nanorods was demonstrated with high sensitivity and fast response.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Sisi Li,Shuang Li,Xiang Li,Xiaodan Zeng,Jie Chen,Zhigang Liu,Shihua Yu,Junjing Hao
Humic acid (HA) was a natural organic macromolecule, which was considered as an ideal carrier for Fenton-like catalysts due to the large number of active functional groups on its surface. For this reason, humic acid-based Fe/Ag bimetallic catalysts (Fe 3 O 4 /HA/Ag) were synthesized by introducing Fe and Ag to the humic acid carrier. The morphology and physicochemical properties of Fe 3 O 4 /HA/Ag was revealed by different characterization methods. In the optimized “Fe 3 O 4 /HA/Ag + H 2 O 2 ” Fenton-like system, Fe 3 O 4 /HA/Ag can rapidly activate H 2 O 2 and accelerate electron transfer. It was applied for sulfadiazine (SDZ) degradation and the removal efficiency reached nearly 100 %. After five cycle experiments, the degradation percentage was maintained at 88.7 %, showing excellent regeneration ability. In addition, Fe 3 O 4 /HA/Ag has good resistance to co-existing ions and different water matrices. The main active substances in the “Fe 3 O 4 /HA/Ag + H 2 O 2 ” system were hydroxyl radicals (•OH), superoxide radicals (•O 2 − ) and singlet oxygen ( 1 O 2 ), which supported by EPR and XPS analysis. This study provides a new way for the promotion of SDZ degradation through bimetallic co-catalytic activation of H 2 O 2 , which has significant potential for the treatment of antibiotic wastewater.
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