Frontiers in Veterinary Science
·
2022
·
IF 3.471
Liao Yan-Juan,Li Duo-Duo,Cai Zong-Ling,Cao Ying,Yu Dong-Ling,Zhang Hong-Yun,Kiflu Abraha Bahlbi,Huang Zai Yin,Li Xiao-Ning,Luo Ting Rong
Rabies is a fatal encephalitis caused by the rabies virus. The diagnosis of the disease depends in large part on the exposure history of the victim and clinical manifestations of the disease. Rapid rabies diagnosis is an important step in its prevention and control. Therefore, for accurate and timely diagnosis and prevention of rabies, we developed nanomaterials for a novel photoelectrochemical biosensing approach (PBA) for the rapid and reliable diagnosis of rabies virus. This approach uses high-efficiency exciton energy transfer between cadmium telluride quantum dots and Au nanoparticles and is low cost, and easy to miniaturize. By constructing PBA, rabies virus can be detected quickly and with a high degree of sensitivity and specificity; the minimum detection concentration limit for rabies virus is approximately 2.16 ffu/mL of rabies virus particles, or 2.53 × 101 fg/mL of rabies virus RNA. PBA could also detect rabies virus in the brain and lung tissue from rabid dogs and mice with better sensitivity than RT-PCR.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zizhen Yu,Li Jiang,Rongyang Liu,Weidan Zhao,Ziheng Yang,Jinyao Zhang,Shangzhong Jin
The emergence of antibiotic-resistant bacterial strains has caused bacterial infections to become a more serious worldwide health problem. The development of multi-functional platform that can quickly and sensitively detect bacteria and effectively inhibit or kill bacterial is important and urgent. Herein, a novel versatile MXene-Au nanocomposite was successfully synthesized by self-assembly method for rapid detection of bacteria and photothermal sterilization. The typical gram-negative Escherichia coli (E. coli) and the gram-positive Bacillus subtilis (B. subtilis) were used as models to perform label-free, rapid and sensitive detection of bacteria based on SERS method. The antibacterial performance of the material was proved by the colony counting method, and the survival rates of E. coli and B. subtilis were as low as 8.05% and 0.06%, respectively. The Ti 3 C 2 T x -Au nanoparticles (NPs) irradiated with 808 nm light showed significant antibacterial effect within only 6 min, and the germicidal rates for E. coli and B. subtilis were 99.25% and 100%, respectively. The photothermal conversion efficiency reached as high as 43.40%. Accordingly, this multi-functional nanocomposite material can not only detect bacteria sensitively, but also has antibacterial and photothermal sterilization effects, which provides a greatly promising countermeasure for clinical treatment of diseases caused by multi-drug resistant bacteria.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 5
·4138-4145
·
IF 1.798
Yu Mei,Meng Yanbing,Zhang Jindan,Liu Jianhua,Li Songmei
Super helical Au/TiO 2 nanocomposites were synthesized using plasmid DNA and incorporated into photoanode of dye-sensitized solar cells (DSSCs). The performance of photoanode films and DSSCs was investigated. Plasmid DNA can not only support as bio scaffold to synthesize Au/TiO 2 nanocomposites, but also act as an effective reducing agent under ultraviolet (UV) irradiation. Compared with TiO 2 -only DSSCs, the light harvesting (LH), corresponding photocurrent and power conversion efficiency (PCE) of DSSCs were enhanced by incorporating of mechanically mixed Au-TiO 2 NPs and Au/TiO 2 nanocomposites. Compared to the TiO 2 -only DSSCs samples (5.12%), the PCE of DSSCs with mechanically mixed Au-TiO 2 nanoparticles (NPs) (6.41%) increased by 25.20%, and DSSCs with Au/TiO 2 nanocomposites (8.17%) increased by 59.57%. The best PCE (8.24%) of DSSCs was obtained with the incorporation of Au/TiO 2 nanocomposites. Two reasons were presented for the best performance of DSSCs with Au/TiO 2 nanocomposites. Firstly, the localized surface plasmon resonance (LSPR) effect of Au NPs enhanced the absorption visible light. Secondly, the super helical structure of Au/TiO 2 nanocomposites provided a path for the transmission of photoelectrons.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Simin Lu,Xiao Zhang,Ling Chen,Ping Yang
In this study, a visual approach for the colorimetric detection of superoxide dismutase (SOD) activity was developed through prohibiting the morphology transition of cetyltrimethylammonium bromide-stabilized Au nanorods (NRs). Superoxide radical (O 2 − ) generated from the reaction between H 2 O 2 and Fe 2+ would preferentially etch Au NRs along the longitudinal direction and result in remarkable changes of shape and the Longitudinal Localized Surface Plasmon Resonance absorption band of Au NRs. Thanks to the dismutation of SOD, SOD decomposed O 2 − into H 2 O 2 and O 2. Thus, the etching process was held back. Under optimal conditions, the sensor reveals excellent selectivity and sensitivity toward SOD (limited detection is 0.25 U). A linear detection range from 1.4 to 14 U was obtained. The proposed sensing system not only was applied in the serum media, but also was made to a kind of cost-effective sensory agarose hydrogel with vivid color changes.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2018
·Vol. 124
·期 12
·1-9
·
IF 1.604
Lin Shuang,Lin Xiang,Zhao Haiyan,Hasi Wuliji,Wang Li
Quantitative analysis always encounters difficulty in the field of surface-enhanced Raman spectroscopy (SERS) because of the lack of accurate and reliable analytical means. In this work, a new approach was demonstrated for the quantitative SERS measurement by self-assembled superlattice based on ultra-smooth Au nanospheres (NSs) embedded with 4-methylthiobenzoic acid (4-MBA) as the internal reference. Malachite green (MG) in water and chrysoidine in drinks with detection limit of 0.35 µM were successfully and quantitatively measured by employing Au@4-MBA@Au NSs superlattice as solid SERS substrate. Compared with conventional SERS methods, the fitting linearity of the relative SERS intensity vs. analyte concentrations has significantly improved by this new analysis means. As a result, our approach is a reliable analytical strategy to solve quantitative problems in SERS analysis, which can be easily applied for on-site detection and for preliminary monitoring of food samples.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Min Wang,Qi Wang,Junzheng Wang,Ronghao Liu,Guanju Zhang,Yanzhao Yang
Two ionic liquid (IL) thermomorphic systems were designed. The thermoregulated property exhibited by the IL systems was utilized for the recovery of Au(III) from acidic medium. The cloud point order of the two ILs was proposed and evidenced via a combination of experimental measurements and quantum chemical calculations. The impacts of salt ions and acid on the thermomorphic phase behavior of the IL–H2O binary mixture system were investigated. After comprehensive comparison, a systematic study of Au(III) extraction by the [Suc][Tf2N]2 (succinyl bis(trifluoromethylsulfonyl)imide) system was carried out because of its outstanding hydrophobicity and extraction ability. Then, a comparison between traditional liquid–liquid extraction (TLLE) and homogeneous liquid–liquid extraction (HLLE) was made during the process of optimization of various extraction parameters. In addition, the anion-exchange mechanism in the extraction process was revealed. The thermoregulated [Suc][Tf2N]2 system presented an excellent selectivity for Au(III) in a solution of coexisting multimetallic ions. Finally, Au(III) was almost completely stripped from the loaded IL phase by oxalic acid. The extraction efficiency of Au(III) using regenerated IL still maintains a surprising stability after five turns of cycling experiments. Hence, the dicationic IL [Suc][Tf2N]2 was regarded as a potential extractant for the recovery of gold.
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高影响因子
ANALYST
·
2014
·Vol. 139
·期 17
·4216-4222
·
IF 3.906
Chong Sun,Lie Ma,Qiuhui Qian,Soniya Parmar,Wenbo Zhao,Bo Zhao,Jian Shen
Analysts are always interested in finding new functional nanomaterials and devices with good properties for electrochemical sensor applications. In this paper, hyperbranched polyester nanoparticles with carboxylic acid functional groups (HBPE–CA NPs) were synthesized and combined with chitosan wrapped around Au nanoparticles (CS–Au NPs) to prepare a novel and sensitive electrochemical immunosensor by adsorption of carcinoembryonic antibody (anti-CEA) on the (HBPE–CA)/CS–Au NPs modified glass carbon electrode (GCE). Under the optimized conditions, the proposed immunosensor displayed a good amperometric response to carcinoembryonic antigen (CEA). Moreover, based on the antibiofouling properties, the immunosensor could be used for the direct detection of CEA in whole blood, and exhibited a wide detection range (1–107 fg mL−1), and a low detection limit of 0.251 fg mL−1 (signal/noise = 3). Control experiments were also carried out by using ascorbic acid (AA), uric acid (UA), human immunoglobulin G (IgG), BSA and glucose in the absence of CEA. The good stability and repeatability of this immunosensor were also proven. Importantly, the results of the detection of clinical whole blood specimens with the proposed immunosensor showed good consistency with the data determined by enzyme-linked immunosorbent assay (ELISA) in serum samples. Furthermore, the developed immunosensor could provide a promising immunoassay strategy for clinical applications, since the values we measured in whole blood directly are likely closer to the real values.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Hailun Zhao,Chao Wang,Weilin Zhong,Suqing Peng,Riyang Shu,Zhipeng Tian,Ying Chen
Probing the effect of spatial morphology of catalyst on its photothermal catalytic performance is crucial for solar-driven renewable catalytic reforming of hydrogen production . In this study, Au nanoparticles loaded on various morphologies of TiO 2 nanoparticles were synthesized and characterized. The experimental results indicated that decorating TiO 2 with Au nanoparticles could dramatically increase its photocatalytic activities by 20–40 times. The photothermal conversion efficiency of Au/TiO 2 (12.74%–25.54%) was higher than those of TiO 2 due to the introduction of LSPR of Au nanoparticles could effectively improve the utilization of solar spectrum. Titania nanoflower (TNF) nanoparticles with high light absorption capacity , better colloidal dispersion stability , porous properties and narrow band gap represented the highest H 2 productivity (144.13 μmol·g −1 ·h −1 ). The coarse surface structure was also conducive to the dispersion of gold particles on the surface of the carrier and the growth rate of Au/TNF hydrogen production (40 times) which was higher than that of other morphology within 2 h. The results of glycerol photothermal hydrogen generation highlighted the effect of temperature on colloidal dispersion stability and hydrogen production capability of nanoparticle suspension. It demonstrated that the photothermal effect aroused a temperature rise that would deteriorate the dispersion stability of the suspension although a local entropy increase in the catalyst nanoparticles might occur. At the same time, the temperature rise caused by the photothermal effect efficiently produces hydrogen in the reaction temperature range. Therefore, an ideal temperature setting for maximal hydrogen generation could be validated and improved the photothermal synergistic impact on biomass-reformed hydrogen generation.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 9
·5539-5545
·
IF 1.134
Yin Hao Yong,Zheng Yi Fan,Wang Ling
A convenient and simple phenol electrochemical sensor was constructed based on the Au/CeO2/ g-C3N4 nanocomposites, which were obtained by loading the gold–cerium oxide (Au/CeO2) nanoparticle on graphite-like carbon nitride (g-C3N4)
through precipitation–reduction methods. The microstructure and morphology of Au/CeO2/g-C3N4 nanocomposite were verified using different techniques such as XRD, TEM, and HRTEM. Voltammetry and amperometry methods were used to study the electrochemical
performance of the constructed phenol electrochemical sensors. The results demonstrated evidently that the combination of Au/CeO2 and g-C3N4 may improve sensing performances of phenol determination. The detection linear range of the sensor was 10–90 μM
under the optimum parameters. The Au/CeO2/g-C3N4 based electrochemical sensor also has low detection limits (2.33 μM) and high sensitivities (0.1080 mA/μM) for phenol detection. In addition, the sensor also had considerably favorable anti-interference
performance. As a consequence, the sensor demonstrated that the electrochemical system provided a promising effective strategy for detection of phenol.
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高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2020
·Vol. 2021
·期 2
·156-165
·
IF 2.529
Gongguo Zhang,Yanyun Ma,Feng Liu,Xiaowei Fu,Xiaoqian Luan,Fengli Qu,Maochang Liu,Yiqun Zheng
Graphical Gold@palladium-silver alloy core-shell dendritic nanocrystals with tunable size and elemental composition were fabricated in high purity via seeded growth. Compared to commercial Pd/C catalysts, the current products exhibit enhanced activity and excellent operation stability for electroxidation of ethanol in alkaline media. We report a facile synthesis of Au@PdAg alloy core-shell nanocrystals in dendrite form, having tunable size and composition. In particular, using spherical Au nanoparticles as seeds, the co-reduction of Pd and Ag precursor in growth stage results in the formation of PdAg alloy shells with a dendrite shape. Their size and elemental composition can be tuned by varying the seed amount and feeding ratio in Pd and Ag precursor, respectively, illustrating the versatility of the current synthetic strategy. The size, morphology, and elemental composition of the products have been characterized using a set of techniques, including SEM, TEM, XRD, XPS, HAADF-STEM, and EDX-STEM mapping. When working as electrocatalysts, the current Au@PdAg alloy core-shell nanocrystals supported by carbon black exhibit enhanced activity and excellent operation stability for electroxidation of ethanol as compared to commercial Pd/C. The current work offers a feasible strategy to preparation of multi-metallic core-shell dendritic nanocrystals with controllable size and composition and could find important use in fuel cells and related fields.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 41
·19824-19833
·
IF 3.925
Xiaoxia Liu,Yang Wu,Yangyang Wang,Huiying Wei,Jinxin Guo,Yanzhao Yang
Liquid–liquid extraction technology based on ionic liquids (ILs) is an efficient and environmentally friendly method to recover Au(III). This work aims to separate Au(III) from hydrochloric acid media using a novel IL [DBA-Pyr][NTf2], which is a pyrrolidinium-based IL functionalized with amide groups. Firstly, experiments have been carried out under optimal conditions, including the concentration, acidity and temperature. It turns out that low concentrations of hydrochloric acid help in Au(III) extraction, while the increase of chloride ion concentrations has an adverse effect. Then, through Job's method, extraction complexes with a molar ratio of [DBA-Pyr][NTf2]-to-Au(III) of 1 : 1 were determined. And, the anion exchange extraction mechanism was confirmed by FT-IR, UV-Vis, and 13C NMR spectroscopies and an electrostatic potential energy (ESP). Under the optimal extraction conditions, it has excellent selectivity to Au(III) compared to both base metal ions and platinum group metals (PGMs). Furthermore, Au(III) could also be recovered from the IL phase using an aqueous solution of thiourea in 95.6% with high selectivity. After 4 cycle experiments, an extraction efficiency of more than 90% is still maintained. The results show that [DBA-Pyr][NTf2] has potential application prospects in Au(III) recovery from hydrochloric acid media.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yali Liu,Hongliang Dong,Haowei Huang,Wei Zong,Yue-E Miao,Guanjie He,Ivan P. Parkin,Feili Lai,Tianxi Liu
Noble-metal nanoparticles are regarded as one of the most promising catalysts to reduce the organic pollutant 4-nitrophenol (4-NP). However, the inevitable agglomeration of noble-metal nanoparticles and their poor distributions in catalytic systems limit their performance. Here, we propose a strategy to encapsulate Au nanoparticles inside porous organic cages (POCs) of soluble RCC3 and stabilize the size of Au nanoparticles at ∼3.25 nm. Typically, the Au@RCC3 composite exhibits excellent 4-NP catalytic reduction performance, which is superior to the corresponding Au bulk catalyst and is also closely related to the size of Au nanoparticles. The normalized X-ray absorption near-edge structure (XANES) results indicate that the electron deficiency at the Au atoms in Au@RCC3 is due to the existence of the RCC3 cage, which is beneficial to accelerate the electron transfer from BH4– to 4-NP during the hydrogenation process. This is also shown by density functional theory (DFT), in which a low energy barrier of 1.03 eV exists for the Au12 cluster compared with 1.37 eV for the Au25 cluster. Therefore, the encapsulation of noble-metal nanoparticles with soluble POCs is an effective way to design and develop stable active catalysts rationally.
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