FOOD CHEMISTRY
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2024
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IF 8.5
Yumei Chen,Jialin Zhang,RuiRui Liu,Ying Zhang,Jingming Zhou,Hongliang Liu,Yankai Liu,Ke Yan,Yanhua Qi,Enping Liu,Xifang Zhu,Aiping Wang
A label-free electrochemical immunosensor was developed to rapidly detect tilmicosin (TMC) residues in pork and milk. The immunosensor was constructed by immobilizing a high-affinity monoclonal antibody against TMC on an rGO-PEI-Ag nanocomposite-modified electrode. The rGO-PEI-Ag nanocomposites were prepared by mixing polyethyleneimine (PEI) modified reduced graphene oxide (rGO) with AgNO 3 solution. The prepared rGO-PEI-Ag nanocomposites showed good redox activity and conductivity, as characterized by ultraviolet-visible spectroscopy (UV–Vis), transmission electron microscopy (TEM), and X-ray diffraction (XRD). During the preparation process, staphylococcal protein A (SPA) was added to targetedly bind the Fc segment of the monoclonal antibody. The immunosensor showed a low detection limit (LOD) of 0.0013 ng/mL, a linear range of 0.01–100 ng/mL, and recoveries ranging from 92.77 to 100.02% in pork and 92.26–101.23% in milk. Furthermore, the immunosensor exhibited good stability, reproducibility, and specificity in detecting TMC in pork and milk real samples.
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Materials Chemistry Frontiers
·
2024
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IF 6
Yujiao Xie,Xue Li,Lei Xu,Chenguang Zhang,Yong Ren,Xiaofeng Shi,Liyun Fu,Jing Wang,Xiawei Xu,Yue Liu,Yue Hu,Zhouxu Zhang,Jiahao Zhang,Ting Yao,Wenzhi Ren,Tianxiang Chen,Xiaoyu Qian,Xiaotian Wang,Jie Lin,Aiguo Wu
Early diagnosis and treatment of liver fibrosis can effectively prevent chronic liver disease from developing into hepatocellular carcinoma (HCC). Conventional techniques to detect liver fibrosis are complex and expensive. The development of non-invasive and sensitive surface-enhanced Raman scattering (SERS) can significantly reduce the time and cost, which is important for improving the efficiency of diagnosis and detection of liver disease. In this study, we developed a cubic core–shell Cu2O@Ag SERS bioprobe for label-free identification of HCC and hepatic fibrosis. The constructed composite substrate has shown impressive SERS sensitivity and good stability. Trace molecules (alizarin red and rhodamine 6G) with concentrations as low as 10−10 mol L−1 could be detected. Cubic Cu2O@Ag also exhibited good SERS stability, since the smallest relative standard deviation (RSD) of Cu2O@Ag-MB (methylene blue) was only 8.80%. Then, the spectral analysis of these three molecules (AR, MB, and R6G) was carried out by applying a machine learning-assisted LDA model, and the classification accuracy reached 100%. Subsequently, four different types of hepatocytes were identified and classified by using the established model and label-free SERS detection with a desirable accuracy of 91.38%. This innovative technology will further facilitate the early diagnosis of HCC and liver disease and assist in the rationalization of clinical treatment.
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ENERGY
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2017
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IF 4.52
Haoran Li,Yurong He,Ziyu Liu,Baocheng Jiang,Yimin Huang
Harvesting solar energy for steam generation has been widely applied in processes, such as sterilization, water purification , sea water desalination , and electricity generation . It has been found that a nanoparticle-modified membrane (NPM) can directly convert incoming solar energy into thermal energy in a short time period. In this work, broadband core–shell Ag@TiO 2 nanoparticles (NPs) having significant larger absorbance were synthesized. Flexible membranes using the deposition of the synthesized NPs were fabricated and floated on the surface of water to enhance the water evaporation. The effects of the density of deposited NPs and the solar irradiance on the evaporation performance were systematically investigated. Results showed that under 5 sun (1 sun = 1 kW/m 2 ) irradiation, the NPM obtained the highest evaporation capacity together with a considerable evaporation efficiency (52.7%) for NPs deposition of 1.0 g/m 2 . In addition, an evaporative efficiency of up to 68.6% was attained under the solar irradiance of 1 sun. On the other hand, most of the heat lost was transferred into the bulk water and gave rise to the enhancement of sensible heat energy, which can be further used in a volumetric absorption type solar collector.
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JOURNAL OF POROUS MATERIALS
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2017
·Vol. 25
·期 1
·189-198
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IF 1.624
Feng Zhouzhou,Lv Xiang,Wang Tianhe
TiO 2 porous ceramic/Ag–AgCl composite was prepared by incorporating AgCl nanoparticles within the bulk of TiO 2 porous ceramic followed by reducing Ag + in the AgCl particles to Ag 0 species under visible light irradiation. The porous TiO 2 ceramic was physically robust and chemically durable, and the porous structure facilitated the implantation of AgCl NPs. Compared with the bare TiO 2 ceramic, TiO 2 porous ceramic/Ag–AgCl composite exhibited higher photocatalytic performance for the degradation of MO and RhB under visible light irradiation. The reaction rate constants k of MO and RhB degradation over TiO 2 porous ceramic/Ag–AgCl composite was respectively 6.25 times and 3.62 times higher than those recorded over the bare TiO 2 porous ceramic. The photocatalytic activity showed virtually no decline after four times cyclic experiments under visible light irradiation. Scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, UV–Vis diffuse reflectance spectroscopy, photoluminescence spectra and X-ray photoelectron spectroscopy were used to characterize the TiO 2 porous ceramic/Ag–AgCl composite.
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MATERIALS LETTERS
·
2025
·
IF 2.7
Yihui Qian,Wenqing Xue,Shuimiao Xia,Zhicheng Shi
The development of advanced electronic equipment provides new opportunities for the application of polymer films. However, polymer films are constrained by their relatively low energy storage density. To overcome this challenge, Au@Ag/BaTiO 3 nanofibers with different sputtering time are designed and prepared by the electrospinning and sputtering method. Experimental results show that the metal nanoparticles improve the charge storage capacity of the polymer and greatly elevate the dielectric constant. The limitation of charge carriers by the minuscule metal nanoparticles considerably increases the breakdown strength. Au@Ag/BaTiO 3 /P(VDF-HFP) composite film achieved the maximum discharge energy density of 13.93 J cm −3 at 655 kV mm −1 , which represents a 124% increase compared to P(VDF-HFP). This contribution provides a new and feasible direction for ceramic nanofibers to optimize the energy storage capacity of composite films in dielectric capacitors.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Shihao Xiong,Tao Peng,Liangliang Huang,Rui wang,Beibei He,Jun Jin,Huanwen Wang,Yansheng Gong
Semiconductor photocatalytic nitrogen reduction reaction (PNRR) stands as a promising clean technique for ammonia synthesis, yet it confronts numerous challenges. In this study, Ag nanoparticle-modified Cu-doped Bi 2 WO 6 (ACB) porous composite materials with varying mass percentages were successfully synthesized using a solvothermal reduction approach. The incorporation of transition metal Cu effectively modulates the energy band position of Bi 2 WO 6 . Furthermore, the introduction of Ag nanoparticles significantly suppresses the recombination of photogenerated carriers. Without adding sacrificial agent, the photocatalytic nitrogen fixation yield of ACB reaches an impressive 184.93 μmol·g −1 ·h −1 , which is 5.44 times higher than that of pristine Bi 2 WO 6 . A comprehensive analysis of the experimental results reveals that the combined effect of Cu doping and Ag nanoparticle loading endows ACB with an increased exposure of active sites, thereby significantly enhancing its photocatalytic nitrogen fixation performance. This research offers a promising approach for the design of metal nanoparticle-supported catalysts for PNRR, holding significant implications for the advancement of other material systems.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Lingyun Ye,Haohui Li,Jiawei Xiang,Junqi Chen,Xin Zhang,Shaona Zheng,Wenbo Liao
In this study, Ag@SiO 2 core-shell nanoparticles were synthesized using the Stöber method and then physically mixing with MPS functionalized poly (styrene-co-acrylate) (PSA) emulsion to obtain a novel antibacterial composite material (PSA/Ag@SiO 2 ). The dispersion of composite latexes was improved by the formation of Si-O-Si covalent bonds , and the migration of AgNPs on the surface of composite films enhanced their antimicrobial activity. Analysis of UV-Vis absorption spectra , TEM images, XPS and XRD data confirmed the core-shell structure of Ag@SiO 2 and the successful coating of AgNPs by SiO 2 . TEM micrographs showed that Ag@SiO 2 core-shell nanoparticles were uniformly dispersed in the composite latexes, with an average particle size of 198 nm for PSA/Ag@SiO 2 composite latexes, larger than that of PSA latexes (162 nm). FTIR spectra also indicated the presence of Si-O-Si covalent bonds resulting from the sol-gel reaction between MPS functionalized PSA with Ag@SiO 2 . XPS and WCA characterization revealed the disruption of the core-shell structure of Ag@SiO 2, leading to the migration of AgNPs to the air-film interface. The results of antibacterial activity demonstrated that PSA/Ag@SiO 2 composite films displayed antibacterial activity against both E. coli and S. aureus , and the former displayer a slightly better antibacterial activity than the latter. The water-based acrylic polymer coatings with antibacterial properties explored in current work have various applications in wood paints, varnishes, metal protection, decorative systems and other related fields.
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TALANTA
·
2024
·
IF 5.6
Lekai Chang,Shuli Bai,Ping Wei,Xingyue Gao,Jinfeng Dong,Bingpu Zhou,Chao Peng,Jianbo Jia,Tiangang Luan
In this study, the plasmonic Ag nanoparticles (Ag NPs) were uniformly anchored on the high conductivity Nb 2 C T x (MXene) nanosheets to construct an Ag/Nb 2 C T x substrate for surface-enhanced Raman spectroscopy (SERS) detection of polystyrene (PS) nanoplastics. The KI addition (0.15 mol/L), the volume ratio between substrate colloid and nanoplastic suspension (2:1), and the mass ratio of Nb 2 C T x in substrate (14%) on SERS performance were optimized. The EM hot spots of Ag/Nb 2 C T x are significantly enlarged and enhanced, elucidated by FDFD simulation. Then, the linear relationship between the PS nanoplastics concentration with three different sizes (50, 300, and 500 nm) and the SERS intensity was obtained (R 2 > 0.976), wherein, the detection limit was as low as 10 −4 mg/mL for PS nanoplastic. Owing to the fingerprint feature, the Ag/Nb 2 C T x -14% substrate successfully discerns the mixtures from two-component nanoplastics. Meanwhile, it exhibits excellent stability of PS nanoplastics on different detection sites. The recovery rates of PS nanoplastics with different sizes in lake water ranged from 94.74% to 107.29%, with the relative standard deviation (RSD) ranging from 2.88% to 8.30%. Based on this method, the expanded polystyrene (EPS) decomposition behavior was evaluated, and the PS concentrations in four water environments were analyzed. This work will pave the way for the accurate quantitative detection of low concentration of nanoplastics in aquatic environments.
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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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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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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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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yachao Wang,Lingfang Liu,Yaxiong Wei,Xinsheng Xu,Guofeng Zhao,Rui Zhong,Cong Fu
Photocatalytic H2O2 production stands as a promising sustainable technology for chemical synthesis. However, rapid charge recombination and limited oxygen adsorption by photocatalysts often limit its efficiency. Herein, we demonstrate that the synergy of Ag and interfacial oxygen vacancies on TiO2 could overcome these challenges. The optimized Ag/TiO2-50 photocatalyst achieved an impressive H2O2 production rate of 12.9 mmol h–1 g–1 and maintained a steady-state concentration of 12.8 mM, significantly outperforming most TiO2-based photocatalysts documented in the literature. Detailed mechanistic studies, aided by TAS, in situ X-ray photoelectron spectroscopy (XPS), and in situ electron paramagnetic resonance (EPR) techniques, indicate that the oxygen vacancies at the Ag–TiO2 interface act as an interfacial hole trap, inducing a directional hole transfer. This, coupled with Ag acting as an electron acceptor, synergistically boosts the electron–hole separation. Additionally, the increased amount of oxygen vacancies at the Ag–TiO2 interface of Ag/TiO2-50 leads to enhanced O2 adsorption, thus contributing to its superior catalytic performance. This study provides valuable insights into interfacial traps in the charge transfer process and highlights the potential of interface regulation for achieving efficient photocatalytic conversion.
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