MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Xuemei Hu,Zhaode Mu,Yueyuan Li,Lijuan Bai,Min Qing
The ever-expanding set of nanocluster-based sensor array and their programmability exhibit remarkable capacity in sensitive and multiplex quantification of heavy metal ions, especially in complex environments. However, this quantitative performance comes with an ever-present constraint: limited luminescence efficiency of nanoclusters due to the intramolecular vibration and rotation phenomena. Here, we pioneered the development of a fluorescent sensor array utilizing metal–organic framework-scaffold gold nanoclusters (AuNCs@MOFs) as sensing elements, enabling precise identification and sensitive quantification of eight heavy metal ions (Ni 2+ , Cr 3+ , Co 2+ , Pb 2+ , Cd 2+ , Ag + , Cu 2+ , and Zn 2+ ). Three kinds of ligand-protected AuNCs (GSH-AuNCs, MPA-AuNCs, and [2-MBA]-AuNCs) embedded in zeolitic imidazolate framework-8 (ZIF-8) exhibit significantly increased luminescence performance. We demonstrate that the fluorescence intensity of the AuNCs@MOFs can be modulated by heavy metal ions, thereby generating distinct fingerprints, which are further analyzed by the statistical analysis method. The developed sensor array identifies eight heavy metal ions accurately across concentrations ranging from 0.5 to 50 μM. Furthermore, this sensor array recognizes multi-component mixtures of heavy metal ions, exhibiting excellent discriminatory capability in both tap water and traditional Chinese medicine samples. Overall, this study provides a straightforward paradigm to construct a nanocluster-based sensor array for sensitive and multiplex heavy metal ions quantification in a complex environment.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2018
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IF 5.123
Lijuan Huang,Xin Zhang,Zhuoyong Zhang
Gold nanoparticle (AuNP)-based colorimetric sensor is sensitive for the detection of metal ions and metal oxyanion in aqueous solution. However, this method is usually not suitable for multi-objective analysis in complex mixture systems because it is suffering from interference of co-existents. In the present paper, we proposed a sensitive, flexible, low-cost, and multi-units sensor method for the qualitative and quantitative analysis of metal ions and metal oxyanion based on the global ultraviolet and visible (UV–Vis) spectra of amino acid-gold nanoparticles (amino acid-AuNPs) sensors in the range of 230–800 nm. Different amino acids (L-Histidine, L-Lysine, L-Methionine, D-Penicillium) which can prevent the aggregation of the AuNPs in NaCl solution, were investigated to build sensor arrays responding to different ions induced AuNPs aggregation. The UV–Vis spectra that Cd 2+ , Ba 2+ , Mn 2+ , Ni 2+ , Cu 2+ , Fe 3+ , Cr 3+ , Cr 2 O 7 2- , Sn 4+ , Pb 2+ induce amino acid-AuNPs displayed different characteristics and the ions were classified correctly by using partial least squares-discriminant analysis (PLS-DA). Taking the advantage of the multivariate analysis and sensor arrays, we simultaneously quantified the ions in binary and ternary mixture systems (Cr 3+ /Cr 2 O 7 2- , Fe 3+ /Cd 2+ , Fe 3+ /Cr 3+ /Cr 2 O 7 2- ). Data fusion methods further improved the prediction accuracy of the chemometric models built on multi-amino acids-AuNPs sensors. The proposed method has a potential for analyzing metal ions and metal oxyanion in much more complex mixture systems.
研究领域:
分析化学
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纳米技术
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环境科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2019
·Vol. 9
·期 31
·17812-17823
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IF 3.049
Fengyan Han,Jiawei Xia,Xinglong Zhang,Yongsheng Fu
Noble metal-based catalysts have been proven to be active for catalytic organic reactions. The selectivity and conversion can be improved by integration with proper carrier materials, and further modulated by tuning the composition as well as the electronic structure of the active noble metals. Compared with unsupported monometallic catalysts, the synergistic interactions between neighboring metals and the combined effects between the carrier materials and the active components often give rise to positive influences on the enhancement of the catalytic efficiency and selectivity. In this work, we report a facile process for the fabrication of nitrogen-doped carbon black (NCB) supported PdAu bimetallic nanoparticles (NPs) with a uniform dispersion and narrow size distribution. The PdAu/NCB catalyst with a Pd/Au mole ratio of 1/1 shows the highest activity towards both Ullmann coupling reactions of aryl halides and the hydrogenation reaction of nitrophenols. Moreover, this bimetallic catalyst also exhibits a superior recycling durability to that of monometallic Pd/NCB and Au/NCB catalysts. The enhanced catalytic performance of the bimetallic catalyst is mainly due to the large BET specific surface area (125.45 m2 g−1) and the synergy between the individual components of the catalyst.
研究领域:
催化化学
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材料科学
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有机合成
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产品关联
DOI
PubMed
高影响因子
Pharmaceutics
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2023
·Vol. 15
·期 5
·1493
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IF 5.4
Chaojun Song,Yutao Liu,Jinwei Hu,Yupu Zhu,Zhengjun Ma,Jiayue Xi,Minxuan Cui,Leiqi Ren,Li Fan
Highly sensitive staphylococcal enterotoxin B (SEB) assay is of great importance for the prevention of toxic diseases caused by SEB. In this study, we present a gold nanoparticle (AuNP)-linked immunosorbent assay (ALISA) for detecting SEB in a sandwich format using a pair of SEB specific monoclonal antibodies (mAbs) performed in microplates. First, the detection mAb was labeled with AuNPs of different particle sizes (15, 40 and 60 nm). Then the sandwich immunosorbent assay for SEB detection was performed routinely in a microplate except for using AuNPs-labeled detection mAb. Next, the AuNPs adsorbed on the microplate were dissolved with aqua regia and the content of gold atoms was determined by graphite furnace atomic absorption spectrometry (GFAAS). Finally, a standard curve was drawn of the gold atomic content against the corresponding SEB concentration. The detection time of ALISA was about 2.5 h. AuNPs at 60 nm showed the highest sensitivity with an actual measured limit of detection (LOD) of 0.125 pg/mL and a dynamic range of 0.125–32 pg/mL. AuNPs at 40 nm had an actual measured LOD of 0.5 pg/mL and a dynamic range of 0.5 to 128 pg/mL. AuNPs at 15 nm had an actual measured LOD of 5 pg/mL, with a dynamic range of 5–1280 pg/mL. With detection mAb labeled with AuNPs at 60 nm, ALISA’s intra- and interassay coefficient variations (CV) at three concentrations (2, 8, and 20 pg/mL) were all lower than 12% and the average recovery level was ranged from 92.7% to 95.0%, indicating a high precision and accuracy of the ALISA method. Moreover, the ALISA method could be successfully applied to the detection of various food, environmental, and biological samples. Therefore, the successful establishment of the ALISA method for SEB detection might provide a powerful tool for food hygiene supervision, environmental management, and anti-terrorism procedures and this method might achieve detection and high-throughput analysis automatically in the near future, even though GFAAS testing remains costly at present.Keywords:gold nanoparticles;gold nanoparticle-linked immunosorbent assay;staphylococcal enterotoxin B
研究领域:
生物化学
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医学检测
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食品安全
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·Vol. 31
·期 22
·32935-32949
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IF 0
Wang Junfeng,Wang Heng,Qi Xianjin,Zhi Gang,Wang Jianhua
The high cost and low adsorption capacity of primary metal-organic frameworks (ZIF-8) limit their application in heavy metal removal. In this paper, Co/Zn bimetallic MOF materials were synthesized with excellent adsorption performance for As 5+ . The adsorption reached equilibrium after 180 min and the maximum adsorption was 250.088 mg/g. In addition, Co-ZIF-8 showed strong selective adsorption of As 5+ . The adsorption process model of Co-ZIF-8 fits well with the pseudo-second-order kinetic model ( R 2 =0.997) and Langmuir isotherm model ( R 2 =0.994), and it is demonstrated that the adsorption behavior of the adsorbent is a single layer of chemical adsorption. In addition, when the adsorbent enters the arsenic-containing solution, the surface of Co-ZIF-8 is hydrolyzed to produce a large number of Co-OH active sites, and As 5+ arrives at the surface of Co-ZIF-8 by electrostatic adsorption and combines with the active sites to generate the arsenic-containing complex As-O-Co. After four cycles, Co-ZIF-8 showed 80% adsorption of As 5+ . This study not only provides a new method to capture As 5+ in water by preparing MOF with partial replacement of the central metal, but also has great significance for the harmless disposal of polluted water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
Journal of Materials Research and Technology-JMR&T
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2024
·
IF 6.2
Ruxia Liu,Wei Zhao,Ye Tian,Jian Zhang,Guoqiang Luo,Qiang Shen
TaC enhancement particles and Re alloy were used to improve the strength and ductility of the tungsten alloy. The synergetic effect of TaC addition and Re alloying on relative density, microstructure, and mechanical properties of tungsten alloy were investigated. The results indicated that a W-based composite with 2.5 wt% TaC addition and 25 wt% Re alloying exhibited yield stress of 1.23 GPa, the ultimate compressive stress of 2.86 GPa, bending strength of 1.30 GPa and strain capacity of 42 %, which was increased by 114 %, 140 %, 226 %, and 133 % than those of pure W. Further analysis revealed that the grain boundary purification, grain refinement, and kinematic strain gradient contribution because of the addition of TaC, lattice distortion, and the generation of dislocations because of the addition of Re alloying are the main strengthening mechanisms in W–TaC-Re composite.
研究领域:
材料科学
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力学
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产品关联
DOI
高影响因子
ACS Nano
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2025
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IF 16
Ou Wang,Zhiheng Ma,Zhenggang Xue,Muyu Yan,Bao-Li An,Yongmei Zhao,Jiaqiang Xu,Xiaohong Wang
Enhancing the gas-sensing properties of metal oxide semiconductors using noble metals’ electronic and chemical sensitization functions is a common approach to develop high-performance gas sensors. However, the high cost and scarcity of noble metals pose challenges to sustainability. In this study, a non-noble metal MnFeCoNiCu high-entropy alloy (HEA) was designed as an alternative to noble metals to enhance the sensitivity of SnO2 and enable efficient, stable, and rapid detection of acetone (C3H6O). The MnFeCoNiCu HEA-loaded SnO2 demonstrated improved performance in C3H6O detection, including high selectivity (κ > 3), a high sensitivity (Ra/Rg = 4.17 at 0.5 ppm), a low detection limit (30 ppb), fast response and recovery time (4.6 s/5 s), long-term stability (over 50 days), and resistance to humidity (stable at 90% RH). The enhanced performance of the HEA is attributed to the fact that it possesses more valence electrons and the electrons can transfer and redistribute among different atoms, which leads to an increase in active oxygen species and catalytic sites, promoting electron sensitization. This study provides insights into designing and developing a highly catalytic, non-noble metal HEA for gas-sensing applications.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
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2020
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IF 3.204
Wanqi Zhao,Panpan Lin,Tiesong Lin,Peng He,Weimin Long,Ruyu Tian
Owing to the isothermal solidification of eutectic Au-Si filler, GH3039 joints were successfully manufactured at 430 °C. After Ti modified, GH3039 joints that could endure 800 °C were creatively achieved through the transformation of reaction layers. Dispersed Ni 49 Ti 14 Si 37 whiskers and CrSi 2 fine particle layer formed at the interface instead of continuous Ni 3 Si layer. This improved the joint shear strength to 131 MPa at room temperature and 15 MPa at 800 °C. Joining at low temperature but applying at high temperature offers a new option for the dissimilar bonding of Ni-based superalloy and ceramics that is in need of the residual stress alleviation.
研究领域:
材料科学
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焊接工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2017
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IF 3.359
Lang Yang,Feifei Jia,Shaoxian Song
The recovery of gold cyanide complex Au(CN) 2 − from gold cyanidation with graphene oxide (GO) and GO hydrogel have been studied to explore the possibility of the application of GO or GO hydrogel in gold cyanidation process for extracting gold. The study was performed on the adsorption of artificial Au(CN) 2 − aqueous solution on GO and GO hydrogel. The adsorption results, as well as the SEM-EDS, AFM and XPS, demonstrated that GO was a better adsorbent for the recovery of Au(CN) 2 − from aqueous solution than conventional activated carbon because of its higher adsorption capacity and adsorption rate. It has been also found that the adsorption of Au(CN) 2 − on GO followed the Langmuir isotherm and fitted well with both the pseudo-first-order and pseudo-second-order kinetics models. The recovery of Au(CN) 2 − with GO might be attributed to the interaction between Au(CN) 2 − and oxygenous function groups on GO surface. GO hydrogel exhibited excellent Au(CN) 2 − adsorption property and easy separation, which enabled it a potential adsorbent in gold cyanidation.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2024
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IF 4.3
Biao Yan,Zhixin Zhao,Xiaojuan Wu,Haoran Li,Duo Liu
Diamond shows great potentials as an ultimate material candidate for application in microelectromechanical systems (MEMS). In this work, we report microcontact printing (μCP) transfer as a facile technique to fabricate diamond MEMS cantilever arrays. We started from the Deryaguin–Landau–Verwey–Overbeek (DLVO) principles and formulated a colloidal “ink” that contains nanodiamonds (NDs) seeds well dispersed in polymethyl methacrylate/acetone. The NDs seeds were then transfer printed onto a silicon (100) substrate by using a flexible polydimethylsiloxane (PDMS) stamp with predefined pattern. The densely packed NDs pattern (∼10 9 cm −2 ) enables facile and selected-area growth of diamond with microwave plasma chemical vapor deposition (MPCVD) technique. A diamond film with minimal graphite contaminants and low residual stresses was obtained after growth at 1118 K for 3 h. The diamond cantilevers were released from the substrate by wet chemical etching using KOH (40 % wt.) and isopropyl alcohol (10 % vol.). An examination of the vibrational kinetics indicates that the diamond film has a high Young's modulus (∼795 GPa) and the cantilevers exhibit consistently distributed resonant frequencies and high quality factors in ambient air. The method opens the door for large-scale, cost-effective production of uniform diamond MEMS devices for sensor and quantum applications.
研究领域:
材料科学
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微机电系统
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2014
·Vol. 6
·期 11
·6173-6179
·
IF 6.739
Yan Feng,Xiaohong Ma,Lin Han,Zhijian Peng,Jun Yang
Nanomaterials usually exhibit structure-dependent catalytic activity, selectivity, and stability. Herein, we report a universal approach for the synthesis of noble metal nanoparticles with a dendritic structure, which is based on the reduction of metal acetylacetonate precursors in oleylamine at a temperature of 160 °C. In this strategy, the metal acetylacetonate precursors are reduced into metal atoms by oleylamine and grow into metal nanoparticles, while oleylamine is simultaneously converted into oleylamide to protect the nanoparticles. The competition between particle aggregation and oleylamide passivation is essential to the formation of a large number of particle aggregates, which eventually grow into nanodendrites via Ostwald ripening process. In particular, in comparison with commercial PtRu/C catalysts, the alloy PtRuOs nanodendrites exhibited superior catalytic activity toward methanol oxidation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liangcai Du,Qianqian Kong,Lichao Gong,Huachen Liu,Song Huang,Yunqi Xie,Zhenhua Yao
High entropy alloys (HEAs) exhibit distinctive core effects and excellent properties, presenting promising prospects for various applications, particularly as potential cermet adhesives. (Ti,W)C-HEA cermets were synthesized using vacuum sintering, employing mechanically alloyed CoCrFeNiTi HEA powder as a binder. The microstructure and mechanical properties of the produced cermets were systematically analyzed, with a particular focus on the effect of the HEA binder on the mechanical properties of the cermets. The findings indicated a decreasing trend in relative density, Rockwell hardness, and transverse rupture strength (TRS) of the cermets. Notably, the CM1 group ((Ti,W)C-30 wt% Co 20 Cr 20 Fe 20 Ni 35 Ti 5 ) demonstrated the most favorable overall properties, with values of 97.0 % for relative density, 83.2 HRA for Rockwell hardness, and 776.6 MPa for TRS. The phase transformation of HEAs at elevated temperatures was meticulously investigated using differential scanning calorimetry (DSC) and heat treatment. Combined with X-ray diffraction (XRD), the phase transformation of Co 20 Cr 20 Fe 20 Ni 25 Ti 15 and Co 20 Cr 20 Fe 20 Ni 15 Ti 25 , heat treated at increasing temperatures, is as follows: FCC + BCC (milled) → FCC + σ (700°C–1100 °C) → FCC (bulk).
研究领域:
材料科学
·
冶金学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）