MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yue Gao,Xiangyi He,Rong Hu,Qing Li
In this study, we synthesized Ag-doped Au/Ag nanoclusters (GSH-Au/Ag NCs) with enhanced luminescence. We conducted a comprehensive investigation into the mechanism behind KMnO 4 -induced fluorescence (FL) quenching of these bimetallic nanoclusters and, leveraging this understanding, developed a sensitive fluorescent method for determining acid phosphatase activity (ACP). The fluorescence quenching mechanism was attributed to a combination of the inner filter effect (IFE) and redox reactions. Subsequently, ascorbic acid (AA) was generated from L-ascorbic acid 2-phosphate trisodium salt (AAP), which was selectively hydrolyzed by ACP . The released AA then reduced KMnO 4 , leading to the inhibition of fluorescence quenching of GSH-Au/Ag NCs by KMnO 4 . This innovative approach exhibited higher sensitivity, with a lower limit of detection of 0.0085 U/L (S/N = 3) for ACP activity sensing. Our proposed strategy was successfully applied to analyze ACP activity in human serum samples, demonstrating promising potential for the widespread utilization of metal nanoclusters in various applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Jiaqi Chen,Yejun Chen,Jintao Shuai,Xuegang Chen,Dawei Zhang,Xi Lu,Xiangyu Fang,Binni Zou,Xue Yu,Feng Zhao,Wei Feng
The plasmonic effect enhances light absorption in semiconductor photocatalysts, while the noble metal-semiconductor interface promotes charge carrier transfer and separation, boosting photocatalytic activity. However, current methods for synthesizing metal-core TiO 2 -shell nanoparticles face challenges, such as keeping stable and preventing aggregation. This study presents a simple and moderate synthesis method for Au@TiO 2 core-shell nanoparticles, enabling precise control over the TiO 2 shell thickness and stable photocatalytic performance. Various characterization techniques were employed to assess the optical and structural properties of the synthesized Au@TiO 2 core-shell nanostructures. The results demonstrated that increasing the Au core concentration led to a gradual decrease in TiO 2 shell thickness. The adsorption properties and photocatalytic degradation efficiency of the synthesized Au@TiO 2 core-shell nanostructured catalysts were thoroughly examined, particularly focusing on their performance with methyl orange (MO) and methylene blue (MB). Au@TiO 2 achieved excellent adsorption performance for MO, with a maximum capacity of 231±6 mg/g. Furthermore, Au@TiO 2 exhibited higher photocatalytic degradation activity of both MO and MB than pure TiO 2 . The mechanism study indicated that it attributed to enhanced visible light absorption, reduced bandgap, and higher valence band energy. Additionally, the Au@TiO 2 catalysts showed good cyclic stability, making them promising for future applications. This research offers insights into designing efficient photocatalysts, addressing existing synthesis challenges, and contributing valuable references for future advancements.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Junkui Li,Chen Li,Wang Guo,Yiqing Guo,Xiaobo Zou,Zongbao Sun
The development of a capsaicin detection system that integrates facile preliminary evaluation with high sensitivity and accuracy across a wide detection range is crucial for the discrimination of gutter oil and the protection of human health. In this study, we constructed a novel colorimetric/SERS dual-mode detection system utilizing peroxidase-like Au@Pt nanoparticles (NPs) that exhibit SERS-activity. The Au@Pt NPs feature a spherical gold nanoparticle core with synapse-like platinum nanoparticles distributed intermittently on their surface, this structure enhances the catalytic activity of the PtNPs and the SERS activity of the AuNPs, making them ideal for designing colorimetric/SERS dual-mode probes. Based on the colorimetric assay, we achieved a capsaicin detection range from 1 to 10,000 μM, with a limit of detection (LOD) of 3.48 μM, as determined by absorption spectroscopy analysis. Additionally, a linear calibration curve for capsaicin ranging from 10 −9 to 10 −5 M was established using the SERS method, yielding an LOD of 7.38 nM. By integrating the advantages of facile detection through colorimetric analysis with the high-sensitivity trace assay provided by SERS, this proposed dual-mode detection system demonstrates excellent sensitivity, reliability, selectivity, and wide detection range compared to previous probes and methods. Consequently, this method can serve as an efficient tool for monitoring oil quality.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Hang Liu,Zhihao Qu,Yanchang Liu,Junlong Liu,Siye Tian,Yuhong Zhang
In this paper, Au nanoparticles (AuNPs) loaded ZrO 2 /ZnSnO 3 nanocubes are prepared through hydrothermal route and chemical reduction method. The crystal structure, morphology, element distribution, chemical composition, specific surface area and pore size of ZrO 2 /ZnSnO 3 nanocubes are described with XRD, TEM, XPS and BET. Interestingly, the incorporation of Zr ions induces the fragmentation of the edge of ZnSnO 3 nanocubes, which enhance specific surface area of ZrO 2 /ZnSnO 3 nanocubes. The response of ZnSnO 3 materials for isopropanol is increased through doping ZrO 2 and modifying AuNPs. The 1.5 at% AuNPs-loaded 5 at% ZrO 2 /ZnSnO 3 nanocubes presents a higher response to 100 ppm isopropanol with a fast response/recovery time (3/4 s) at the operating temperature of 260℃. And the generation of ZnSnO 3 , ZrO 2 and AuNPs heterojunctions contributes to raise the isopropanol response. In addition, the catalysis of ZrO 2 and AuNPs also can increase their reaction speed between absorbed oxygen and isopropanol molecules. This research results provide a new scheme for the development of isopropanol sensor.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Xiaohan Wang,Jingru Wang,Wenshi Zhao,Rui Guo,Sicheng Cui,Jie Huang,Jiaxin Lu,He Liu,Yang Liu
Tetracycline (TC) is widely distributed in environment and a significant environmental pollutant. It has been challenging to rapidly identify and effectively remove TC contaminants. This work produced a multifunctional Fe 3 O 4 -Cu 2 O-Au-MIPs nanocomposite (FCAu-MIPs NCs) based on molecular imprinting technology for selective SERS detection and photocatalytic degradation of TC. We synthesized FCAu NCs with various Au contents and analyzed the relationship between Au content and SERS performance using finite-difference time-domain (FDTD) technique. Exceptional SERS performance could be attributed to the dense distribution of multiple hotspots on the SERS substrate. The photocatalytic mechanism of FCAu-MIPs NCs towards TC was also discussed. The combination of the narrow-bandgap semiconductor Cu 2 O and noble metal Au with localized surface plasmon resonance (LSPR) effect facilitated efficient light absorption and enhanced charge carrier transfer efficiency. Both SERS detection limits as low as 10 −9 M and selective photocatalytic degradation of TC in soil were achieved. Furthermore, FCAu-MIPs NCs were successfully recovered and reused with assistance of external magnetic field. After six cycles, outstanding SERS and photocatalytic capacities from FCAu-MIPs NCs could still be maintained. The FCAu-MIPs NCs with selective recognition ability to TC should thus hold tremendous applicative possibilities for highly sensitive detection and efficient degradation of TC.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
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IF 7.1
Tianhang Liu,Kaisheng Yao,Hang Li,Qi Wang,Tianhang Han,Aozhou Wang,Haili Zhao,Weiwei Lu
Developing a simple, environmentally friendly, and mild method to one-step prepare bimetallic nanoframes is pretty important but still technically challenging. In this paper, a simple and easy-to-operate ionic liquid (IL)-regulated protocol is proposed to fabricate Au–Pd superbranched trigonal nanoframes (STNFs) in water at room temperature. In the aqueous solution containing precursors (Na2PdCl4 and HAuCl4) and a reducing agent (ascorbic acid), a common IL 1-octyl-3-methylimidazolium chloride ([C8mim]Cl) was used to guide the anisotropic growth and construction of Au–Pd STNFs, brightly showing green and energy-saving characteristics. Au–Pd STNFs take shape as unique two-dimensional (2D) trigonal frameworks containing multilevel orderly branches. It is found that [C8mim]Cl is crucial to the formation of Au–Pd STNFs. Owing to the unique structures, high specific surface areas, large freestanding sizes, and probably electronic effects between Au and Pd, Au–Pd STNFs-1 exhibit dramatically enhanced catalytic activity, selectivity, durability, and convenience for recycling in the 4-nitrostyrene hydrogenation reaction. Specifically, 4-nitrostyrene can be converted completely only within 5.0 min at 25 °C under atmospheric pressure, and the selectivity toward 4-nitroethylbenzene is as high as 100% and maintains good performance after five cycles. It is expected that well-constructed Au–Pd STNFs also display advanced potential in other applications.
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高影响因子
Journal of Physical Chemistry C
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2024
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IF 3.3
Xiao-Cong Ma,Zhou Yu,Ya-Li Zhang,Jian-Ang Jin,Jian-Ping Li,Xu-Liang Fan,Qiang Wan,Ju-Fang Zheng,Xiao-Shun Zhou,Ya-Hao Wang
Nickel foam is a prevalent material for the oxygen evolution reaction (OER) in alkaline media. Herein, we employed a one-step electrodeposition technique to effectively fabricate a Ni(OH)2/Au/nickel foam (denoted as a Ni(OH)2/Au/NF) catalyst. This catalyst exhibits both surface-enhanced Raman scattering (SERS) activity and catalytic activity. The electrochemical SERS technique is employed for in situ monitoring of surface structure changes and intermediates during the OER process. The molecular evidence reveals that the electro-driven initial Ni(OH)2 first becomes disordered and finally is oxidized to NiOOH. When the OER occurs, the active oxygen species of NiOO* is observed to release O2. Compared with that of bare NF, the more disordered NiOOH from Ni(OH)2/Au/NF has a greater OER activity. These findings significantly advance the understanding of the OER mechanism on Ni-based catalysts, providing guidelines for the elaboration and optimization of future catalytic systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Qingshan Dai,Jiarui Huang,Xia Qiu,Nannan Wang,Dongmei Wang,Yongxin Li
Investigating the kinetics and mechanisms of catalytic hydrogenation reaction is important for fundamental research and chemical engineering, especially at single nanowire/nanoparticle level. In this work, we constructed a dual-functional single Pt@Au nanowire (Pt@Au NW) reaction platform, which was used for in-situ monitoring the p-nitrothiophenol (4-NTP) catalytic reduction process by using surface-enhanced Raman scattering (SERS) and UV–vis spectroscopy. The conversion of reactants and intermediates as well as the product generation during the reaction process were analyzed carefully, and the influencing factors of temperature and light were also discussed. Moreover, the density functional theory (DFT) was used to further investigate the effect of the single Pt@Au NW on catalytic hydrogenation reaction of 4-NTP. The results show that the single Pt@Au NW can be a good platform for in-situ monitoring catalytic hydrogenation reaction of 4-NTP with excellent catalytic activity, high stability, and good reproducibility, and clarified that trans -dimercaptoazobenzene ( trans -DMAB) intermediates were produced that are further converted to the p-aminothiophenol (4-ATP). The work will not only give researchers new insights into the combination of the single nanowire/nanoparticle with spectroscopic techniques, but may also inspire further in-depth studies of multifunctional catalysts for catalytic hydrogenation reaction at single entity level.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xinrong Li,Shuliang Chen,Zihui Dai,Xianzhi Hu,Futing Zi
The selective recovery of gold ions from gold leaching solutions limits the industrial application of the copper-ammonia (Cu 2+ –NH 3 )-thiosulfate system. Here, the influence of the carbon chain length of organic phosphines on the selective recovery of gold ions was studied, and an extractant (trihexylphosphine, THP) that is suitable for the selective recovery of gold ions from a Cu 2+ –NH 3 -thiosulfate leaching solution was screened. The selectivity of organic phosphines with different carbon chain lengths for gold ions was C 8 = C 6 > C 4 > C 3 > C 2 , and when the number of carbon atoms in a single carbon chain was at least six, the selective recovery of gold ions from the Cu 2+ –NH 3 -thiosulfate solution was realized. THP completely recovered low concentration gold ions (6.73 mg/L) in the Cu 2+ –NH 3 -thiosulfate gold leaching solution regardless of the pH. The mechanism of gold ion extraction into the organic phase mainly involved ligand exchange between THP and [Au(S 2 O 3 ) 2 ] 3− . Job’s method and density functional theory calculations confirmed that the composition ratio of the complex formed by THP and Au was 2:1 at the practical and theoretical levels, respectively. Finally, Multiwfn and VMD were used to visually predict the possible reaction sites in THP. This study provides an exact method for the selective recovery of gold ions from thiosulfate-based gold leaching solutions, which will promote the development of thiosulfate-based gold leaching systems.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Shuting Jiang,Yifan Wang,Haoran Cheng,Gongliang Zhang,Hongman Hou,Jingran Bi,Shuang Yan,Hongshun Hao
A unique multifunctional photoelectrochemical(PEC) platform for the simultaneous detection and inactivation of Salmonella enteritidis (SE) was proposed. The photoactive material in the platform was a Bi 2 MoO 6 /V 2 CTx composite, and gold nanoparticles were modified to link the aptamer via Au-S bonds. The aptamer was to link the complementary DNA (cDNA) to the electrode surface via base complementarity. In the presence of SE, the aptamer attached to Salmonella enteritidis selectively and then the cDNA was released from the aptamer electrode, the photocurrent signal was amplified, allowing for quantitative detection of Salmonella enteritidis . The linear range of the method was 1.82 × 10 2 CFU/mL to 1.82 × 10 8 CFU/mL based on the specific recognition of Salmonella enteritidis by aptamer. The detection limit was 26 CFU/mL. Furthermore, due to its photoelectrocatalytic action, the PEC platform demonstrated strong antibacterial activity (99.99 %). The new technique was created to detect and inactivate Salmonella enteritidis in a timely and sensitive manner.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
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IF 5.667
Zheng Shen,Xindong Zhang,Xiaohui Ma,Ruoning Mi,Yu Chen,Shengping Ruan
A novel hierarchical ZnO rose-like architecture assembled by porous nanosheets was synthesized through a facile hydrothermal method combined with calcination process and used to fabricate gas sensors. The gas sensing measurements showed that the samples exhibited superior individual BTX (benzene, toluene and xylene) sensing properties. By designing more tiny pores on hierarchical rose petal-like nanosheet surface, the specific surface area of the samples was further extended. Besides, highly dispersed Au nanoparticles were grown on the ZnO rose-like architectures to enhance the gas sensing performance via a precipitation manner. Transmission electron microscopy (TEM) analyses indicated the average grain size of these Au nanoparticles was about 3 nm. The gas sensing results showed that the responses of the Au-ZnO sensor to 20 ppm individual benzene, toluene and xylene were 16.25 46.43 and 76.47, which were 4.33, 4.47 and 6.51 times higher than those of the pure specimens. Besides, the optimal working temperature was also decreased from 302 °C to 206 °C. The Au-ZnO sensor also exhibited short response/recovery times, low-concentration detection capability and good stability. The schottky contact between Au and ZnO, catalytic activity of Au nanoparticles and the specific ZnO porous rose-like architectures could be three pivotal factors for the superior BTX sensing properties.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
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IF 4.9
Feina Niu,Panpan Jiang,Lei Wang,Yawen Gao,Hong Zhu,Nan Gao,Zhiwei Cai,Hanping He,Yunbin He,Gang Chang
Raman studies have consistently emphasized the precise detection of target analytes by strategically manipulating the morphology and structure of noble metal nanomaterials. In this study, the nanorods with Ag shell and Au nanobipyramid core (Au NBPs@Ag) were designed and prepared through the weting chemcial method. The length of the nanorods can be adjusted from 131 ± 8 nm to 165 ± 23 nm by controlling the amount of Ag precursor, while keeping their width constant. According to the size of Au NBPs@Ag nanorods, surface-enhanced Raman scattering (SERS) performance would change significantly, and the optimal signal response was achieved when the aspect ratio of Au NBPs@Ag nanorods was 4.43. This can be due to the synergistic effect of gold core and silver shell changed by nanorods morphology, which further affected SERS performance. Moreover, Au NBPs@Ag modified polydimethylsiloxane (PDMS) flexible substrate was developed through interface self-assembly technology, allowing for sampling on irregular surfaces. The flexible SERS substrate was successfully applied to detect malachite green in contaminated river bass with wide linear range from 0.1 nM to 10 μM and detection limit of 0.1 nM. These results indicated that Au NBPs@Ag nanorods SERS substrate had great potential in the rapid trace detection of environmental detection and food safety.
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高影响因子
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