JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Bo-hui Li,Kai-hua Zhang,Xiao-jing Wang,Yu-pei Li,Xinying Liu,Bao-Hang Han,Fa-tang Li
High-performance photocatalysts for catalytic reduction of CO 2 are largely impeded by inefficient charge separation and surface activity. Reasonable design and efficient collaboration of multiple active sites are important for attaining high reactivity and product selectivity . Herein, Cu-Cu 2 O and Ag nanoparticles are confined as dual sites for assisting CO 2 photoreduction to CH 4 on TiO 2 . The introduction of Cu-Cu 2 O leads to an all-solid-state Z-scheme heterostructure on the TiO 2 surface, which achieves efficient electron transfer to Cu 2 O and adsorption and activation of CO 2 . The confined nanometallic Ag further enhances the carrier’s separation efficiency, promoting the conversion of activated CO 2 molecules to •COOH and further conversion to CH 4 . Particularly, this strategy is highlighted on the TiO 2 system for a photocatalytic reduction reaction of CO 2 and H 2 O with a CH 4 generation rate of 62.5 μmol∙g −1 ∙h −1 and an impressive selectivity of 97.49 %. This work provides new insights into developing robust catalysts through the artful design of synergistic catalytic sites for efficient photocatalytic CO 2 conversion.
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PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2024
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IF 5.7
Jing Feng,Lei Feng,Shuo Sun,Xujie Wang,Huitian Zhi,Ruhui Shang,Yingchao Yang,Luyao Wang,Zhengquan Yan,Lei Hu
Background NO 2 − and S 2− are two kinds of common toxic anions widely distributed in environmental water, soil and food products. Human beings have suffered a lot of diseases from intake of excessive NO 2 − or S 2− , i.e ., infantile methemoglobin , cancer and even to death. Although tremendous efforts have been afforded to monitor NO 2 − and S 2− , most were high instrument-depended with complex processing procedures. To keep food safety and to protect human health, it will be a huge challenge to develop a convenient and efficient way to monitor S 2− and NO 2 − in practice. Results A kind of folic acid capping Bi 3+ -doped Ag quantum dots (FA@Bi 3+ -Ag QDs) was developed for the first time by one-pot homogeneous reduced self-assembly. Not only did FA@Bi 3+ -Ag QDs possess intrinsic fluorescent property, it expressed synergistic peroxidase-like activity to catalyze the redox of 3,3′,5,5′-tetramethylbenzidine (TMB) and H 2 O 2 with K m / v max of 0.087 mM/6.61 × 10 −8 M s −1 and 6.42 mM/6.25 × 10 −7 M s −1 respectively. Interestingly, trace S 2− could exclusively alter its fluorescent property and peroxidase-like activity, exhibiting significant hypochromic and “turn-on” fluorescent effects. While trace NO 2 − could make FA@Bi 3+ -Ag QDs-TMB-H 2 O 2 system hyperchromic. Under the optimized conditions, FA@Bi 3+ -Ag QDs were applied for dual-mode recognition of S 2− and visual sensing of NO 2 − in real food samples with satisfactory recoveries, i.e ., 100.7–107.9 %/95.8–104.7 % and 97.2–104.8 % respectively. The synergistic enzyme-mimic mechanism of FA@Bi 3+ -Ag QDs and its selective response mechanisms to S 2− and NO 2 − were also proposed. Significance This represents the first nanozyme-based FA@Bi 3+ -Ag QDs system for dual-mode recognition of S 2− and visual sensing of NO 2 − , well meeting the basic requirement in drinking water set by WHO. It will offer a promising way for multi-mode monitoring of different pollution using the same nanozyme-based sensor.
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Journal of Energy Storage
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2024
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IF 8.9
Zhubin Yao,Xiaowei Wu,Yueyu Zeng,Shuyao Li,Tieqiang Fu,Yunjun Luo,Guoqing Zhang,Wensheng Yang,Xinxi Li
Composite phase change materials (CPCMs) with significant amounts of latent heat can absorb and release at a constant transition temperature have attracted much attention in energy storage and electrical vehicles fields. Nevertheless, it is still a great challenge to utilize in battery thermal management system owing to low thermal conductivity and liquid leakage . Although many efforts have endeavored to improve transferring heat capacity, the thermal conductivity of CPCM is still need to explored. Herein, a novel high thermal conductivity and anti-leakage CPCM including polyethylene glycol, nano-Ag particles modified diatomite and expanded graphite (PDAE) has been designed and prepared. And the nano-Ag particles have evenly attached to the surface of diatomite through in-situ chemical reduction reaction and self-assembly technology. The experimental results indicate that PDAE exhibits excellent thermal conductivity with 1.91 W∙m −1 ∙K −1 owing to three-dimensional heat transferring network constructed by nano-Ag particles and expanded graphite. Moreover, it is no shape variation and leakage of PDAE under continuously heated at 60 °C for 2 h. In addition, the temperature performance of battery modules with the different CPCMs have been compared in detail, the results demonstrates that battery module with PDAE can be maintained below 53 °C and the temperature difference is effectively controlled within 5 °C even at 3C discharging rate after 10 cycles. With these prominent performances, this designed CPCM with high thermal conductivity will offer a promising insight into the passive thermal management system in practical application.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yansheng Liu,Yongquan Wei,Guofu Wang,Xiaobo Jia,Jin Zhou,Hongqi Li,Haixin Chang,Zhaoxu Li
Surface-enhanced Raman scattering (SERS) spectroscopy plays an important role in enabling high-precision detection and non-invasive diagnostics. Periodic metallic nanostructures with strong electromagnetic fields and tunable localized surface plasmon resonance can achieve high SERS sensitivity, but fabricating such nanostructures remains a challenge. In this work, the anodic aluminum oxide (AAO) nanocavity template-assisted process of fabricating periodic nanostructures with modulating morphologies from Ag nanoclaws (AgNCWs) to Ag nanocones (AgNCEs) is proposed. The morphologies-related SERS performances of nanostructures are analyzed by using rhodamine 6 g (R6G) as a probe molecule and the optimized AgNCEs possess a limit of detection (LOD) of 1 × 10 −9 M. A sandwich strategy is applied to detect SARS-CoV-2 S protein in phosphate-buffered saline (PBS) and pharyngeal swab solution (PSS). The ACE2-modified AgNCEs (ACE2/AgNCEs) structure is applied to bind to the SARS-CoV-2 S protein. The 4-MBA and SARS-CoV-2 S antibody functionalized Au nanoparticles (AuNPs) are used as nanotags. By forming the ACE2/AgNCEs-SARS-CoV-2 S protein-nanotags sandwich structure, characteristic peak intensities of 1580 cm −1 are used as the report signal, and the LOD for SARS-CoV-2 S protein in PBS and PSS solution are 10 fg/mL.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Keyan Liu,Wei Feng,Yanru Li,Donglai Han,Tianna Wu,Kaiyue Li,Shuo Yang
Surface-enhanced Raman spectroscopy (SERS) with enormous advantages has emerged as a powerful tool for both highly sensitive structural detection of analytes and various imaging applications. A notable advancement in the realm of multifunctional SERS substrates is the integration of magnetic nanoparticles endowed with magnetic manipulation capabilities and noble metal nanoparticles exhibiting plasmonic resonance properties. This synergistic combination offers substantial practical benefits for trace analysis across diverse fields. In this paper, a new paradigm of Fe 3 O 4 @PEI-DTC-Ag (Fe 3 O 4 @PD-Ag) photomagnetic nanocomposites based on magnetic Fe 3 O 4 nanoparticles (NPs), the noble metal silver quantum dots (Ag QDs) and the adhesive layer polyethyleneimine dithiocarbamate (PEI-DTC) for convenient recycling and ultrasensitive SERS detection was developed by engineering hydrothermal and seed-growth methods. The SERS performance of the Fe 3 O 4 @PD-Ag substrates with varying amounts of Ag was evaluated by detecting 4-aminothiophenol (4-ATP). Among the tested samples, Fe 3 O 4 @PD-Ag-4 with a silver solution volume of 200 ml exhibited the optimal performance, showcasing an enhancement factor ( EF ) of 4.418 × 10 5 . Moreover, the relative standard deviations (RSDs) were calculated to be less than 11.5 %, demonstrating the SERS substrates exhibit good uniformity and spectral reproducibility. Of note, the SERS substrate has demonstrated successful trace detection of thiram molecules, achieving a limit of detection (LOD) of up to 10 -9 M. The intensity of SERS signals shows a linear correlation with the logarithm of thiram concentration, ranging from 10 -4 to 10 -9 M, thus providing compelling evidence for quantitative detection. Importantly, the Fe 3 O 4 @PD-Ag-4 SERS substrate also showcases outstanding performance for detecting thiram in real food, underscoring its significant potential for application in food safety monitoring.
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Journal of Energy Chemistry
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2024
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IF 14
Peng Wang,Shafidah Shafian,Feng Qiu,Xiao Zhang,Yuping Zhao,Bin Wu,Kyungkon Kim,Yong Hua,Lin Xie
2,2′,7,7′-Tetrakis( N , N -di(4-methoxyphenyl)amino)-9,9′-spirobifluorene (Spiro) is an essential hole-transport material used in perovskite solar cells (PSCs). However, the redox reaction of Spiro and its impact at the interface with the metal electrode are not yet fully understood. In this study, we introduced a crystalline additive (CA) to regulate the redox process of Spiro and its interface with an Ag electrode. Our findings indicate that CA functions as a molecular scaffold, improving the crystallinity and stability of radicals in Spiro throughout the entire redox reaction. This enhancement increases the hole mobility of Spiro and strengthens the internal electric field, thereby improving hole extraction and transport efficiency at both interfaces. Moreover, the optimized redox reaction of Spiro reduces energy loss at the Ag electrode, significantly boosting the power conversion efficiency to 25.21%. Furthermore, CA mitigates the aggregation of lithium salt and enhances the stability of the device. Our findings contribute to a deeper understanding of hole-transport mechanisms of Spiro and emphasize the importance of reducing energy loss at the Spiro/Ag electrode interface in PSCs.
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INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Yuwei Liu,Min Yang,Jiuao Wang,Hao Yue,Zongliang Du,Xu Cheng,Haibo Wang,Fei Cheng,Xiaosheng Du
Blending thermoplastic starch (TPS) with poly (lactic acid) (PLA) and poly (butylene adipate- co -terephthalate) (PBAT) is considered as one of the most promising ways to produce fully biodegradable and renewable biopolymers. However, these composite biopolymers face challenges such as, poor mechanical performance, inferior water vapor and ultraviolet barrier resistance, and weak antibacterial property due to the incompatibility of hydrophilic TPS with hydrophobic PLA and PBAT. In this work, Ag nanoparticles were uniformly in-situ grown on cellulose nanocrystal to prepare a novel silver nanoparticles loaded-cellulose nanocrystal (Ag-CNC). Then, antimicrobial TPS/PLA/PBAT composite films with enhanced mechanical properties, superior water vapor barrier capacity and highly UV-shielding effect were fabricated by introducing Ag-CNC and oligo (lactic acid) grafting starch (OLA- g -ST, an eco-friendly compatibilizer) into TPS, PLA and PBAT matrix. As expected, the introduction of Ag-CNC significantly improved antibacterial property and UV-shielding effect (283 % increased) of TPS/PLA/PBAT composite films. Moreover, the incorporation of OLA- g -ST and Ag-CNC into the composites resulted in a notable enhancement of the mechanical properties (tensile strength and elongation at break increased by 77.95 % and 63.23 %, respectively) and water vapor barrier capacity (40.8 % increased) of TPS/PLA/PBAT composite films. Hence, the innovative fully biodegradable composite films displayed remarkable potential in the field of renewable biopolymers as well as multifunctional packages.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yun-Fan Wang,Xiao-Yang Zhang,Jun-Yang Liu,Yuan-Jun Song,Yu-Qing Ni,Ze-Xian Chen,Yuan-Chun Li,Tong Zhang
The widespread use of human–computer interaction has generated enormous interest in stretchable and wearable electronic devices, such as smart gloves, wearable mice, electronic skins, and other sensors capturing deformation signals on human skins. The main challenge of such devices lies in monitoring multi-level human motions such as bending, stretching, and pressing. Developing new materials and fabrication methods is indispensable to tackle this challenge. In this paper, we propose a multi-model and naked-hand wearable sensing system based on Ag and thermoplastic polyurethane (Ag-TPU) composite with porous microstructure and direct writing technology which implements pressure sensing and strain sensing simultaneously. Dynamic response test illustrates that motion frequencies from 0.24 s −1 to 0.88 s −1 can be detected, covering the typical frequency of clicking operation on a mouse, with the response time between 156 ms and 609 ms at the frequency of 0.88 s −1 . Due to the protection of TPU polymer, this material remains stable and effective in1400 bends at a bending curvature from 0.17 to 0.2. These characteristics, along with the low cost, high sensing sensitivity, simple production procedure, biocompatibility, and wearability on the naked hand, make our material match the actual requirements of human–computer interaction mice. With an extra inertial measurement unit, the mouse can distinguish different gestures and finger movements in various frequencies. Through our test, it can control the cursor and paint on computers with the multi-model characteristic. Therefore, our wearable virtual mouse demonstrates a new way to match flexible materials with human–computer interaction interfaces, extending the application of Ag-TPU composite with multi-model sensing while ensuring the timeliness and accuracy of information transfer in the process of human–computer interaction.
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JOURNAL OF LUMINESCENCE
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2024
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IF 3.3
Yaxin Li,Mei Chen,Hongzhi Lu,Shoufang Xu
A straightforward and highly sensitive ratiometric fluorescence sensor comprising blue emissive carbon dots , silver nanoprisms, and o-phenylenediamine (B-CDs-Ag NPRs-OPD) was developed for the detection of H 2 O 2 and glucose. Ag NPRs were etched into Ag + ions upon exposure to H 2 O 2 , which caused non-fluorescent OPD to be oxidized and produce 2,3-diaminophenazine (DAP), resulting in intense yellow fluorescence emission at 555 nm. DAP can quench the B-CDs based on inner filter effect (IFE), leading to a decrease in their fluorescence intensity at 435 nm. Because glucose oxidase may catalyze the oxidation of glucose to produce H 2 O 2 , this approach can also be used to detect glucose. The unique triangular structure leads to the easy etching of the edge and tip of Ag NPRs by H 2 O 2 into Ag + ions, allowing for the high sensitivity of detection of H 2 O 2 and glucose with limit of detection (LOD) of 0.12 μM and 0.6 μM, respectively. Furthermore, with the increase of the concentrations of H 2 O 2 and glucose, a visible color shift from blue to yellow-green occurs, which can be detected using a smartphone's color recognition application that captures the RGB channel values of the image. Real-time and on-spot detection of H 2 O 2 and glucose were achieved based on smartphone sensing platform, presenting vast potential for applications in various fields.
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高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Yahui Zhang,Xia Huang,Jiachang Chen,Jiyuan Li,Shen Zhou,Junying Chen
Quantitative analysis of harmful patina components on the surface of bronzeware is crucial as patina can corrode artifacts. Surface-enhanced Raman spectroscopy (SERS) has a common application in surface analysis. However, there exists an absence of documented investigations concerning the quantitative analysis of detrimental patina, particularly the chloride patina. To achieve high sensitivity in targeting harmful patina, we report a fabrication method for constructing Ag/Au alloys in the pores and on the surface of UiO-66 (zirconium 1,4-dicarboxybenzene metal–organic framework) nanomaterials, resulting in Ag/Au/UiO-66 nanoparticle monolayers formed by self-assembly at the oil–water interface. By incorporating them onto the surface of PVA hydrogel, we obtained SERS sensor devices with excellent flexibility, outstanding optical transparency, and ultrahigh activity. These sensor devices efficiently sample irregular surfaces and detect micrometer-scale specimen. They significantly enhance the Raman characteristic peaks of measured objects, facilitating precise analysis of the patina composition on the surface of bronze artifacts. The Raman peak at 118 cm–1 was boosted from 367 to 11,909 for detecting harmful patina, and the enhancement factor of the SERS substrate was calculated to be 3.6 ×1010 for detecting the Raman peak of rhodamine 6G (R6G), which could be easily detected at 610 cm–1 at a concentration of 10–13 mol/L (M). The Raman peaks at 610 cm–1 from the SERS substrate could also be readily detected. By grafting the organic fluorescent group amino-MQAE onto the surface of Ag/Au/UiO-66 nanoparticles (NPs), the content of harmful patina on the surface of bronze artifacts treated for different durations was indirectly determined. These results indicate the successful construction of the Ag/Au alloy on the surface of UiO-66 NPs, resulting in SERS sensor devices with excellent flexibility, optical transparency, and ultrahigh sensitivity.
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高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Yuqing Xu,Beibei Cui,Xueqin Zhang,Ying Sun,Baoping Lin
The Cu@Ag core-shell particles are the highly anticipated functional materials in electronic applications which are required to be high electrical conductivity, good thermal properties and low cost. However, it remains a challenge to obtain a completely and uniformly coated Ag shell in low silver content. During the coating process, it is essential to regulate the reduction of Ag + on the surface of Cu to ensure uniformly silver shell. We developed a strategy to prepare uniformly coated Cu@Ag particles by employing hydroxy acids as complexing agents with “double-sided adhesive” function. Compared to conventional complexing agents, the employed hydroxy acids can not only coordinate with Ag + but also complex with Cu due to the more carboxyl and hydroxyl groups which act like a “double-sided adhesive”, that can pull Ag + to the surface of Cu, and then accomplish the coating of Ag with replacement and reduction reaction. The impact of different types of hydroxy acids as complexing agents on the coating effect of silver-clad copper powder was investigated when the silver addition was 15 %. Results indicated that the obtained Cu@Ag particles with tannic acid as complexing agent show high coating quality layer with low surface sliver content (11.4 %). Moreover, the obtained Cu@Ag particles exhibit good dispersibility, promising thermal stability and low electrical resistivity (30 μΩ·cm).
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Yiwen Gui,Ao Chen,Yiting Liu,Ning Cai,Jumei Li
A sensitive and stable substrate is crucial in Raman spectroscopic techniques for the effective detection of environmental contaminants. In this study, a novel core–shell composite, Ag@UiO-66, was developed by coating Ag nanospheres with a porous metal–organic framework (MOF), UiO-66-NH2. This composite combines high stability with selective enrichment capabilities for Cr(VI). Leveraging the unique properties of UiO-66-NH2, such as its porosity, abundant amine groups, and Zr nodes, Ag@UiO-66 effectively enriches Cr(VI) through pore-filling, electrostatic interactions, and Zr–O coordination. Direct analysis of water samples spiked with Cr(VI) showed detection limits of 6.53 × 10–8 M in pond water and 7.52 × 10–8 M in lake water. The composite also exhibited excellent signal uniformity and reproducibility, with a low relative standard deviation of 6.78% across 30 batches. Additionally, it demonstrated outstanding recyclability under simulated sunlight irradiation due to the solar photocatalytic properties of UiO-66-NH2. Ag@UiO-66 also showed superior stability compared to pristine Ag nanospheres when exposed to strong acids, bases, or oxidative environments (e.g., 1% H2O2 solution). Overall, Ag@UiO-66 shows great potential as a reliable substrate for the trace detection of chemical analytes via SERS.
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高影响因子
危险品化学品经营许可证（带存储）