INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Haiyun Chen,Huihong Yang,Junling Ji,Xiyu He,Shenming Yang,Jing Chen
Noble metal modifications can promote surface interactions between target vapors and metal oxides. The surface effect plays a significant role in influencing the gas response of materials. The size range of Ag nanoparticles is about 20–30 nm, which are uniformly modified on the surface of α-MoO 3 . This was achieved through a chemical reduction method, where sodium borohydride served as the reducing agent and L-lysine was utilized as a stabilizer for the nanoparticles. The uniform coating of Ag nanoparticles on the α-MoO 3 is expected to enhance the gas-sensing properties of the composite material. The α-MoO 3 sensor based on 10 mol% AgNPs modification showed the highest response at 200 ℃, which was 1.6 and 1.66 times greater than the response of the pristine α-MoO 3 sensor when tested at concentrations of 5 and 10 ppm, respectively. For H 2 S levels of 10, 20, and 40 ppm, the times for response and recovery were merely 9/20 s, 7/24 s, and 9/25 s, respectively, showing fast response recovery characteristics. The enhancement of the gas-sensitive sensing mechanism for hydrogen sulfide can be explained in terms of the electronic sensitization and chemical sensitization of α-MoO 3 .
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TALANTA
·
2024
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IF 5.6
Wei Li,Shijie Dai,Xiang Li,Qianjin Li,Jianlin Li
The stability, reproducibility and engineering of SERS substrate faces a great challenge in melamine SERS assay. In this work, a simple, highly sensitive, stable and cost-efficient SERS detection platform for melamine was established based on its Raman fingerprints spectrum. The Ag@ porous silicon photonic crystal (Ag@PPC) was prepared as the 3D SERS substrate by electrochemical etching and magnetron sputter technology. The main influence factors for the preparation of SERS substrate were investigated in detail. The analytical enhancement factor of the 3D SERS substrate can reach to 2.6 × 10 8 . The 3D SERS detection platform showed a wide linear detection range of 10 −4 ∼10 mg L −1 and a low limit of detection of 0.1 μg L −1 for melamine. Moreover, such detection platform showed good stability, high reproducibility and high recovery rates for melamine. The 3D Ag@PPC SERS substrate can be easily prepared and engineered, displaying a great potential application in food safety field.
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PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
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IF 2.7
Xingyu Liu,Canhai Cai,Cansen Liu,Qingmei Chen,Jianyu Xu,Ran Zhang
Corrosion and fouling problems are two main challenges for devices working in the ocean. However, most existing solutions lack the ability to concurrently obtain corrosion resistance and antifouling behavior. Here, a novel waterborne epoxy (WEP) based composite coating that has remarkable resistance to corrosion and fouling is developed. The WEP-based composite coating consists of nanohybrid filler prepared by loading silver (Ag) nanoparticles on graphite nanoplatelets (GNP) surface through a facile in situ hydrothermal synthesis and polydopamine (PDA) modification. The PDA modification effectively improves the dispersion and compatibility of GNP/Ag@PDA (GAP) with the WEP matrix. The synergistic effect of Ag with chemical antifouling behavior and GNP with physical barrier function endows the GAP/WEP composite coating with a low corrosion rate of 1.04 × 10 −7 mm a −1 after immersing in 3.5 wt.% NaCl solution for 28 days, which is about two orders of magnitude lower than that of blank WEP coating, and a high inhibition rate of 90.81% after immersing in Phaeodactylum tricornutum solution for 7 days. This approach has the potential to address the needs of a range of applications around anticorrosion and antifouling in the ocean.
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Nano Research
·
2024
·
IF 9.5
Yan Danni,Dong Yuhui,Wei Naiwei,Yang Shuai,Zhu Hong,Gu Wanzhong,Zou Yousheng,Zeng Haibo
Quaternary Ag-In-Ga-S (AIGS) quantum dot (QD) is considered a promising, spectral-tunable, and environmentally friendly luminescent display material. However, the more complex surface defect states of AIGS QDs resulting from the coexistence of multiple elements lead to a low (< 60%) photoluminescence quantum yield (PLQY). Here, we develop a novel convenient method to introduce Z-type ligands ZnX 2 (X = Cl, Br, I) for passivating the surface defects of AIGS QDs to dramatically enhance the PLQY and stability without affecting the crystalline structure and morphology. Results show that the addition of ZnCl 2 during the purified process of AIGS QDs leads to a 3-fold increase of PLQY (from 28.5% to 87%). Impressively, the highest PLQY is up to a recorded value of 92%, which is comparable to typical heavy metal QDs. Exciton dynamics studies have shown that the rapid annihilation process of excitons in treated QDs is inhibited. We also confirm that the improvement in PLQY is a result of the effective passivation of the non-coordinating atom on the QD surface by building a new bonding between sulfur dangling and Zn 2+ . The realization of high PLQY will further promote the application of AIGS QDs in luminescent displays.
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CHEMICAL PHYSICS
·
2024
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IF 2
Xing-Fei Guo,Quan Li,Hai-Tao Ren,Jing Wang,Xu Han
Mesoporous TiO 2 with a homogeneous Bi-Ag bimetallic distribution (Bi@Ag@MTs) can be obtained by calcination of a titanium-based metal organic framework (MOF, MIL-125) with Bi and Ag loading and applied to the photocatalytic reduction of nitrate using formic acid as a hole scavenger. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and energy dispersive spectrometer (EDS) analyses show that Ag(I) and Bi(III) are present in MTs as fine clusters and Bi@Ag@MTs have a specific pancake structure, which provides a good carrier for photocatalytic reaction. The contents of Ag and Bi in Bi@Ag@MTs can be up to 2.28 wt% and 0.54 wt% analysed by Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). Under UV irradiation, Bi@Ag@MTs(0.2,0.4) showed a high reduction rate (3.28 h −1 , 4.2 times that of P25), high conversion (100 %, 1.3 times that of P25) and high N 2 selectivity (89.2 %, 2.1 times that of P25) for nitrate reduction. In addition, Bi@Ag@MTs(0.2,0.4) showed good reusability, with the respective NO 3 − conversion and N 2 selectivity still reaching 82.2 % and 78.0 % after four cycles. X-ray photoelectron spectroscopy (XPS) analysis showed that under UV irradiation, part of Ag(I) would be reduced to Ag 0 , and the formed Ag-Ag 2 O structure helped to improve the photocatalytic activity of the catalyst. This preparation strategy provides assistance in the design of photocatalytic materials with significant activity and durability for nitrate reduction.
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WEAR
·
2024
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IF 5.3
Jiebin Du,Mingchong Lu,Jiamin Fang,Wei Li,Dexin Chen
In this work, an innovative approach termed rotary spray deposition has been developed for the synthesis of conductive and wear-resistant silver (Ag) coatings on copper (Cu) substrates, aimed at applications in electrical contact materials. The fabricated coatings exhibited superior properties, demonstrating significantly higher hardness (140 HV) and markedly lower resistivity (1.711 × 10 -8 Ω m) compared to conventional silver contacts. The tribological behavior and wear mechanisms of the Ag coatings were rigorously evaluated using reciprocating friction testing under conditions of minimal load and current. Findings revealed that wear predominantly occurs through mechanisms of fatigue, abrasive, and adhesive wear. Notably, the introduction of a 2A current in conjunction with a 3 N force during friction testing resulted in a stable and reduced coefficient of friction, a smoother wear track surface, and the lowest contact resistance observed, indicative of enhanced antiwear properties. This improvement is attributed to the synergistic effects of electric current and friction, leading to the formation of a nanocrystalline structural layer at the wear track. Such a layer facilitates a stable frictional contact state and enlarges the contact area, thereby achieving a stable conductive state with reduced contact resistance and, consequently, superior tribological properties.
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ChemistrySelect
·
2024
·Vol. 9
·期 31
·e202401727
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IF 1.9
Dan Liu,Ying Qiu,Fengrui Yu,Guohua Zhang,Wenjuan Zhou,Qingting Ni
Graphical In the present study, the blue fluorescent L-Cys@Ti 3 C 2 MQDs are synthesized using hydrothermal methods, and the preparation process is simple, rapid, and mild. The fluorescence of L-Cys@Ti 3 C 2 MQDs can be effectively quenched by Ag + through a static quenching mechanism, demonstrating high sensitivity and excellent selectivity for Ag + detection. MXene quantum dots (MQDs), an emerging zero-dimensional nanomaterial, have garnered significant attention from researchers due to their distinctive physical and chemical properties. In this study, cysteine-functionalized Ti 3 C 2 MQDs were synthesized using a facile hydrothermal methods, resulting in the functionalized Ti 3 C 2 MQDs exhibiting intense blue fluorescence attributed to size-dependent effects and surface defects. Furthermore, the cysteine-functionalized Ti 3 C 2 MQDs exhibit excitation wavelength-dependent emission behavior and serve as a highly sensitive fluorescent probe for Ag + detection with an impressive low limit of detection (LOD) of 0.015 μM. Moreover, they demonstrate exceptional sensitivity and selectivity in determining Ag + . This study presents a novel approach for the detection of Ag + and highlights the immense potential of cysteine-functionalized Ti 3 C 2 MQDs in environmental applications.
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ChemNanoMat
·
2024
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IF 2.6
Haibo Zeng,Shuai Yang,Danni Yan,Hong Zhu,Naiwei Wei,Yuhui Dong,Yousheng Zou
In recent years, Ag-In-Ga-S (AIGS) quaternary quantum dots (QDs) have garnered significant attention as a novel class of environmentally friendly and non-toxic QDs. However, the hydrothermal synthesis method for aqueous QDs has been plagued by issues such as inconsistent size, subpar crystallinity, and low photoluminescence quantum yield (PLQY). Herein, we developed a dual ligand strategy based on the hard and soft acids and bases (HSAB) theory to synthesize aqueous AIGS QDs with an impressive PLQY of up to 64.3%, currently the highest value among hydrothermal-synthesized uncoated I-III-VI QDs. The QDs exhibit better crystallinity, narrow size distribution (3.07 ± 0.31 nm), and remarkable stability. The mechanism underlying this dual ligand strategy was further elucidated, shedding light on the distinct influences of different ligands on the growth of QDs. The high PLQY contributes to the further application of aqueous AIGS QDs in luminescent displays and the field of biology. Meanwhile, this ligand strategy has broad reference significance for efficient preparation of other water-soluble QDs.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Yidan Zhang,Zhiguang Guo
Multifunctional wearable textiles can simulate human perception and convert it into visual data, which has advanced application prospects. As an important branch, thermal management wearable textiles have been widely concerned in the aspects of thermal insulation, flame retardant, photothermal anti-icing, electrothermal deicing and even water evaporation. Here, inspired by the bearing structure, we simply soaked the PET textile in Ag@MXene hybrid solution several times to form a Ag@MXene conductive network with Ag NPs as the connection point on the textile fiber, and finally carry out hydrophobic modification. Based on plasma effect, the synergistic action of Ag NPs and MXene enhances the photothermal response of the material. In addition, the addition of Ag NPs effectively reduces the stacking between MXene layers and forms a Ag@MXene conductive network with Ag NPs as the connection point on the textile fibers. The stable temperature range of PDMS/Ag@MXene PET textile is 70–80 °C under one solar illumination intensity, and the stable temperature of PDMS/Ag@MXene PET textile can reach 117 °C at a constant voltage of 3 V. Based on the excellent thermal effect, this textile achieves photothermal anti-icing, electric thermal de-icing, keeping warm and removing sweat. The textile has a water evaporation efficiency of about 0.58 g h −1 , which can achieve excellent anti-sweat function. Finally, the textile also achieved rapid flame retardant within 7 s. PDMS/Ag@MXene PET textile processes excellent photothermal and electrothermal conversion ability, acid/water stability and flame retardant ability, and has promising application prospects in thermal management textiles such as deicing and anti-icing, fire prevention, warmth and water evaporation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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IF 4.9
Kai Jin,Xiaoping Huang,Huifang Yang,Yahong Li,Jianxian Zeng,Hu Zhou,Yuan Liu,Rui Zhang
The efficient removal of Ag + ions from wastewater not only preserves the environment but also promotes the reutilization of silver metal. Therefore, in this study, we have developed an advanced ion imprinted membrane (IIM) and employed it as an adsorbent for the efficient removal of Ag + ions from aqueous solution. The dynamic adsorption results demonstrated that the prepared IIM exhibited superior filtration and separation performance when applied to feed solutions with lower concentrations (12 mg/L) and higher pH levels (pH=6). The presence of co-existing metal ions in the feed solution had negligible impact on the separation efficiency of IIM towards Ag + ions, highlighting its exceptional recognition ability and selective separation capability. The results from static adsorption experiments indicated that the adsorption of Ag + ions onto the membrane surface conformed to both Langmuir model and the pseudo-second-order model, indicating that the adsorption process was a monolayer chemisorption . Reusability findings revealed a slight decline in uptake capacity and water flux of IIM after five desorption-adsorption cycles, showcasing its potential application value in Ag + ions removal. The EDS , FTIR and XPS results substantiated that Ag + ions were adsorbed onto the IIM surface through the chemical reactions between Ag + ions and C S and C O groups.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhongzheng Zhu,Siyu Liu,Junyi Yao,Qitan Zheng,Yutong Guo,Yujie Chen,Hezhou Liu,Hua Li
To address the issue of low strength and recovery stress in recyclable shape memory polymer (SMP) materials with dynamic covalent bonds in practical applications, we propose a method based on Ag-S coordination interactions to improve dynamic covalent bonds, thereby preparing recyclable SMP with high recovery stress and large recovery strain. The introduction of in situ reduced silver nanoparticles (AgNPs) in the SMP system play multiple roles, serving as additional physical crosslinking points at the microscale and coordinating with disulfide bonds in the system to construct a multi-level dynamic network structure. This endows the material with exceptional mechanical properties (tensile strength of 25.93 MPa and fracture strain of 1466.83 %) and recovery driving stress (5.59 MPa), while maintaining more than 99 % shape recovery and fixity rate. Furthermore, due to the outstanding photothermal performance of AgNPs, the composite material has acquired remote photothermal driving capabilities. The proposed Ag-S coordination enhancement offers a new approach for SMP materials that achieve both large actuation distance and high recovery stress, holding significant potential for applications in soft robotics and actuators.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
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IF 8
Runcheng Liu,Jie Yan,Jian Shi,Shouzhen Jiang,Wen Yang,Zihao Zhang,Mingshun Jiang
Tilted fiber Bragg grating-based surface plasmon resonance (TFBG-SPR) sensors, despite their portability and high sensitivity, often suffer from background interference and lack self-cleaning capabilities. Although two-dimensional materials possess the capacity to enhance sensor functionality, their integration frequently results in uneven dispersion or agglomeration of nanosheets, compromising stability and reproducibility. Herein, a novel TFBG-SPR sensor that integrates a large-area, self-supported covalent organic framework (COF) film with Ag nanoparticles (NPs) is proposed. The COF-366 film functions as a molecular sieve, selectively isolating target analytes from background molecules, thereby improving anti-interference performance. The Ag NPs generate localized surface plasmon resonance (SPR) hotspots, significantly enhancing the signal of the target analyte. Moreover, the sensor exhibits robust self-cleaning properties through SPR-driven photocatalytic degradation. These attributes collectively endow the sensor with superior anti-interference, self-cleaning, and high-sensitivity functionalities, making it suitable for reliable detection in practical applications. Experimental validation reveals that the sensor effectively eliminates background interference and maintains consistency across repeated measurements, achieving a detection limit of 1.5 × 10 –10 M for methylene blue. This work offers a promising candidate for large-scale environmental monitoring and other challenging detection scenarios, thereby expanding the application range of COF materials in advanced photonic devices.
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