FOOD CHEMISTRY
·
2025
·
IF 9.8
Peng Bo Huang,Jing Long Qu,Shuo Yang,Tian Jiao Shui,Huan Huan Yang,Li Ping Cheng,Yang Qin,Jun Xi
Glycinin is a common food allergen, which may cause allergic shock in severe cases, thus posing a threat to public health. Therefore, rapid and accurate detection of glycinin is crucial. In this study, we synthesized Au Ag core–shell nanoparticles loaded with the Raman reporter molecule 5,5′-dithiobis(2-nitrobenzoic acid) (DTNB), which provides both colorimetric and Raman signal capabilities. These nanoparticles were applied to colorimetric lateral flow immunoassay (CM-LFIA) and surface-enhanced Raman scattering-based lateral flow immunoassay (SERS-LFIA), respectively. The CM-LFIA achieved a visual limit of detection (LOD) of 1 ng/mL, while the SERS-LFIA exhibited a LOD of 40 pg/mL, with good linearity over the range of 1 ng/mL to 10 4 ng/mL (R 2 = 0.997). Moreover, the quantitative SERS-LFIA demonstrated satisfactory performance in spiked food matrix samples, achieving acceptable recoveries of 82–88 % and RSD ranging from 4.88 % to 6.97 %.
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DOI
PubMed
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Lingfang Liu,Liangyan Deng,Yachao Wang,Yu Wang,Yaxiong Wei,Guofeng Zhao,Cong Fu
Photocatalytic oxidative coupling of methane (OCM) represents a promising route for chemical and fuel synthesis, yet the development of photocatalysts with high activity and selectivity remains challenging. Here, we demonstrate a synergistic ensemble of Au nanoparticles and Li-doped TiO2 that significantly enhances photocatalytic OCM performance in a flow reactor. The optimized catalyst achieved a C2 hydrocarbon production rate of 4.1 mmol g–1 h–1 with selectivity up to 97% and maintained robust stability over 50 h. Comprehensive mechanistic studies, employing in situ transient absorption spectroscopy (TAS), in situ electron paramagnetic resonance (EPR), and operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) techniques, indicate that Li dopants facilitate the formation of bulk/surface defects by a unique bulk-to-surface-to-gas Li migration process. These induced defects serve a dual role: bulk defects act as effective hole traps, while surface defects provide active sites that enhance charge transfer and promote O2 adsorption/activation. Combined with Au acting as a methane activation center, this synergy promotes efficient C–H activation and C–C coupling, thus contributing to its superior catalytic performance. This work provides critical mechanistic insights into photocatalytic OCM and underscores the potential of surface and bulk engineering for efficient photocatalytic processes.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2010
·
IF 3.083
Jingming Gong,Ting Zhou,Dandan Song,Lizhi Zhang
We demonstrate a new highly sensitive and selective Hg(II) sensor with a graphene-based nanocomposite film as the enhanced sensing platform. The platform was constructed by homogenously distributing monodispersed Au nanoparticles (AuNPs) onto the two-dimensional (2D) graphene nanosheet matrix. Its surface structure and electrochemical performance were systematically investigated. Such a nanostructured composite film platform could combine with the advantages of AuNPs and graphene nanosheets, greatly facilitate electron-transfer processes and the sensing behavior for Hg(II) detection, leading to a remarkably improved sensitivity and selectivity. The detection limit was found to be as low as 6 ppt ( S / N = 3), much below the guideline value from the World Health Organization (WHO). The interference from other heavy metal ions such as Cu 2+ , Cr 3+ , Co 2+ , Fe 3+ , Zn 2+ and I − ions associated with mercury analysis could be effectively inhibited. The performance of new sensor was also evaluated by the direct detection of Hg(II) in river water specimens, suggesting it is very promising for practical environmental monitoring applications.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Li Min Lu,Yan Sha Gao,Yin Xiu Zuo,Jing Kun Xu,Wen Min Wang,Haohua He,Ping Li,Yong Fang Yu
A high performance electrochemical immunosensor was constructed for sensitive label-free detection for α-fetoprotein (α-FP) based on Au nanoparticles/poly(3,4-ethylenedioxythiophene) modified multi-walled carbon nanotubes (AuNPs/PEDOT-MWCNTs), which acted as signal amplification matrix. PEDOT functionalized MWCNTs were prepared via interfacial polymerization method. PEDOT was uniformly distributed on MWCNTs, which can provide more binding sites for high mass loading of metal nanoparticles. Subsequently, AuNPs were attached on MWCNTs by introducing conductive PEDOT to bridge the AuNPs and MWCNTs walls. The AuNPs/PEDOT-MWCNTs nanocomposites displayed good electron transfer ability, which enabled good analytical properties for α-FP detection.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jia Yang,Rong Wang,Xiaorui Sun,Yan Li,Jian Liu,Xiaojun Kuang
The use of novel two-dimensional MXene materials and conventional g-C3N4 photocatalysts to fabricate the composites for hydrogen evolution reaction (HER) has attracted much attention, for which there is plenty of room for the enhancement of hydrogen evolution rates particularly under visible light and photostability. Herein, g-C3N4 was modified by copolymerization of malonamide and melamine and used to fabricate the ternary composites of Au particles and Ti3C2 MXene, and based on the synergistic effect, the composites enhanced the hydrogen evolution rates by 2.1, 99.8, and ∞ times compared with the unmodified g-C3N4 under UV, simulated sunlight, and visible light illumination, respectively. Moreover, the composite exhibited a sustained hydrogen evolution capacity in the cycle test for up to 120 h. Theoretical calculations and experimental results indicated that the hot electrons of Au are injected into the modified g-C3N4 and transferred to Ti3C2 simultaneously along with the photogenerated electrons of the modified g-C3N4 and then further transferred to Au, forming a photogenerated electron transfer channel of Au and modified g-C3N4 → Ti3C2 → Au within the composite. Ti3C2 acts as a bridge for fast separation of photogenerated electrons and holes on Au and modified g-C3N4, playing a key role in the enhanced photocatalytic performance. In addition, the visible light absorption ability of Au also positively contributed to the enhancement of visible light photocatalytic performance by providing hot electrons. Therefore, the selection of suitable cocatalysts for the design of composites is a crucial research direction to improve the photocatalytic performance and photostability of photocatalysts.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Yue Tian,Qingqiang Cui,Linlin Xu,Anxin Jiao,Shuang Li,Xuelin Wang,Ming Chen
The unique hot carrier-driven direct plasmonic photocatalysis of coinage metal nanomaterials (NMs) via energetic localized surface plasmon resonance (LSPR) in visible-light region has been explored in recent years. However, the low photoinduced electron transfer efficiency and insufficient separation of electron-hole pairs would severely preclude their widespread practical applications. Herein, we demonstrate an interesting plasmonic photocatalyst based on the construction of icosahedral (Ih) Au@C 60 core-shell NMs, taking advantage of specific delocalized π electrons structure of a tight C 60 shell and enhanced LSPR property of Ih Au core. Then, the pronounced interfacial interaction at junction region endows the obtained Au@C 60 NMs with an outstanding photoinduced hot carrier-transmission during photocatalytic reaction, facilitating a remarkably higher (1.89 times) photocatalytic activity toward visible-light driven degradation of crystal violet (CV) dyes, as compared to bare Au NMs. Impressively, the photocatalytic activity of Ih Au@C 60 NMs can be effectively optimized by changing the pH value of reaction solution, with the kinetic rate constant reaching the maximum value of 0.179 min −1 in pH 0 11.4 solution, while 0.005 min −1 at pH 0 3.0. Moreover, due to the protection of a tight C 60 shell, the Ih Au@C 60 NMs also possess excellent photocatalytic stability/reusability in recycling runs, holding great potential for the design of robust and high-performance plasmonic photocatalysts in repeated practical applications.
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高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2019
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IF 2.983
Yaohui Gao,Ziwei Hu,Jiamin Wu,Zan Ning,Jingyi Jian,Ting Zhao,Xiaochen Liang,Xingjie Yang,Zi Yang,Qinyu Zhao,Jianping Wang,Zhigang Wang,Nicoleta Elena Dina,Ana Maria Raluca Gherman,Zhengjin Jiang,Haibo Zhou
Palmatine is a protoberberine alkaloid separated from several plants and application as an anti-inflammatory and antibacterial agent in the therapy of gastrointestinal and genitourinary disorder. Thus, the fast quantification of palmatine is important in clinic medical assays. Herein, we report simple, fast and sensitive colorimetric visualization and surface-enhanced Raman spectroscopy (SERS) dual-mode detection of palmatine basing on bimetallic size tunable silver shell capped gold nanoparticles (Au@Ag NPs). Interesting, the best signals output for dual-mode sensing of palmatine were both 5 nm Ag shell thickness of Au@Ag NPs. Meanwhile, we found that the addition of NaHSO 4 significantly improves the aggregating sensitivity of Au@Ag NPs to trace palmatine. Upon exposure to 0.1 μM level palmatine, NaHSO 4 -optimized Au@Ag NPs solution exhibits a highly sensitive color change from orange to green and rapid aggregation kinetics within the initial 5 min, which can directly be seen with the naked eye and monitored by UV–vis absorbance spectra. In addition, we measured palmatine by SERS with the excellent enhancement effect of Au@Ag NPs for further increase the sensitivity and selectivity. More importantly, other protoberberine alkaloids do not interfere with this dual-mode sensor due to the different interaction force between Au@Ag NPs and these alkaloids, and the applicability of the sensor is well demonstrated in real samples with satisfactory results. This provide a fast and simple assay for the rapid detection of palmatine in traditional Chinese medicine, the limit of detection (LOD) is 0.13 μM by the naked eye and 0.10 μM by UV–vis spectroscopy. Therefore, the size-tunable of NaHSO 4 -optimized Au@Ag NPs can be used not only as a naked-eye sensor of palmatine, but also as a highly selective SERS probe.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·Vol. 416
·期 19
·4417-4426
·
IF 3.8
Zhu Zhentong,Wang Xiaoli,Wang Na,Zeng Chaoqin,Zhang Lei,Fan Jiamin,Yang Xin,Li Peizhe,Yuan Hongxia,Feng Yanjun,Huo Shuhui,Lu Xiaoquan
Artificial enzymes with high stability, adjustable catalytic activity, controllable preparation, and good reproducibility have been widely studied. Noble metal nanozymes, particularly gold nanoparticles (Au NPs), exhibit good catalytic activity, but their stability is poor. In this study, zeolitic imidazolate framework-8 (ZIF-8) was used as a carrier for Au NPs, thus improving the utilization efficiency and conservation stability of the nanozymes. A ZIF-8/Au nanocomposite with peroxidase activity and a raspberry-shaped structure was synthesized. In the assay, ZIF-8/Au catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue product oxidized TMB (oxTMB). Glutathione (GSH) selectively inhibited this reaction, with a detection limit of 0.28 µM and linear range of 0.5–60 µM. Using the photo and chromaticity analysis functions, we developed a portable analysis method using a smartphone equipped with a camera module as a detection terminal for a wide range of rapid screening techniques for GSH. Preparation of raspberry-shaped ZIF-8/Au improved the catalytic activity of Au NPs and good results were demonstrated in serum, which suggests their promising application under physiological conditions. Graphical Abstract
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Kaili Yao,Xiaojun Tan,Bing Dai,Jie Bai,Qiaoyang Sun,Wenxin Cao,Jiwen Zhao,Lei Yang,Jiecai Han,Jiaqi Zhu
Boron doped diamond (BDD) electrode is a promising electrochemical material for detecting dopamine level in the human’s body. In this work, we developed a new doping source - graphite and solid boron oxide powders to synthesize BDD film with microwave plasma chemical vapor deposition , so as to avoid using toxic or corrosive dopants , such as boroethane and trimethylborate. The synthesized BDD film is pinhole free and with high doping density of 8.44 × 10 20 cm −3 calculated from the Raman spectroscopy . Subsequently, Au nanospheres were decorated on the surface of BDD film to improve electrochemical performance of the BDD film. The Au nanoparticles modified BDD electrode demonstrates an excellent electrochemical response, a high sensitivity (in the range of 5 μM-1 mM), and a low detection limit (∼ 0.8 μM) for detecting dopamine.
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高影响因子
Small
·
2024
·Vol. 20
·期 32
·2311840
·
IF 13
Xinhua Zhao,Lingling Du,Xiaxia Xing,Zhenxu Li,Yingying Tian,Xiaoyu Chen,Xiaoyan Lang,Huigang Liu,Dachi Yang
With the recently-booming hydrogen (H 2 ) economy by green H 2 as the energy carriers and the newly-emerged exhaled diagnosis by human organ-metabolized H 2 as a biomarker, H 2 sensing is simultaneously required with fast response, low detection limit, and tolerant stability against humidity, switching, and poisoning. Here, reliable H 2 sensing has been developed by utilizing indium oxide nanocubes decorated with palladium and gold nanodots (Pd–Au NDs/In 2 O 3 NCBs), which have been synthesized by combined hydrothermal reaction, annealing, and chemical bath deposition. As-prepared Pd–Au NDs/In 2 O 3 NCBs are observed with surface-enriched NDs and nanopores. Beneficially, Pd–Au NDs/In 2 O 3 NCBs show 300 ppb-low detection limit, 5 s-fast response to 500 ppm H 2 , 75%RH-high humidity tolerance, and 56 days-long stability at 280 °C. Further, Pd–Au NDs/In 2 O 3 NCBs show excellent stability against switching sensing response, and are tolerant to H 2 S poisoning even being exposed to 10 ppm H 2 S at 280 °C. Such excellent H 2 sensing may be attributed to the synergistic effect of the boosted Pd–Au NDs’ spillover effect and interfacial electron transfer, increased adsorption sites over the porous NCBs’ surface, and utilized Pd NDs’ affinity with H 2 and H 2 S. Practically, Pd–Au NDs/In 2 O 3 NCBs are integrated into the H 2 sensing device, which can reliably communicate with a smartphone.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xuan Huang,Ming Yi,Kewen Tang
To address resources shortage and environmental degradation, noble metal recovery from e-waste is in desperate need. Herein, to achieve selective extraction of gold (Au) and palladium (Pd) from practical e-waste, a series of tridentate thioether extractants are designed with ester functional groups at both ends of the thioether. By varying the chain length of the ester alkyl, the relationship between extractant structure and performance is further explored. The results indicate that the as-introduced tridentate structure facilitate the Au(III) and Pd(II) extraction, demonstrating a complex mechanism involving both coordination substitution and ion association. Notably, the extractant with the shortest carbon chain length and smallest molecular weight delivers outstanding extraction capacities of 920.2 mg/g for Au(III) and 280.7 mg/g for Pd(II). More importantly, it exhibits superior selectivity (∼100 %) for Au(III) and Pd(II) in complex metal solutions. This work guides the design of thioether-based extractants for sustainable recovery of noble metal from practical e-waste.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Kai-Xin Xie,Rui-Ping Huo,Xiu-Li Song,Qiao-Ling Liu,Yue Jiang,Yu-Han Li,Lu-Lu Dong,Jia-Xin Cheng
Surface plasmon coupled emission (SPCE), a novel surface-enhanced fluorescence technique, can generate directional and amplified radiation by the intense interaction between fluorophores and surface plasmons (SPs) of metallic nanofilms . For plasmon-based optical systems, the strong interaction between localized and propagating SPs and “hot spot” structures show great potential to significantly improve the electromagnetic (EM) field and modulate optical properties . Au nanobipyramids (NBPs) with two sharp apexes to enhance and restrict the EM field were introduced through electrostatic adsorption to achieve a mediated fluorescence system, and the emission signal enhancement was realized by factors over 60 compared with the normal SPCE. It has been demonstrated that the intense EM field produced by the NBPs assembly is what triggered the unique enhancement of SPCE by Au NBPs, which effectively overcomes the inherent signal quenching of SPCE for ultrathin sample detection. This remarkable enhanced strategy offers the chance to improve the detection sensitivity for plasmon-based biosensing and detection systems, and expand the range of applications for SPCE in bioimaging with more comprehensive and detailed information acquisition. The enhancement efficiency for various emission wavelengths was investigated in light of the wavelength resolution of SPCE, and it was discovered that enhanced emission for multi-wavelength could be successfully detected through the different emission angles due to the angular displacement caused by wavelength change. Benefit from this, the Au NBP modulated SPCE system was employed for multi-wavelength simultaneous enhancement detection under a single collection angle, which could broaden the application of SPCE in simultaneous sensing and imaging for multi-analytes, and expected to be used for high throughput detection of multi-component analysis.
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高影响因子
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