CATALYSIS LETTERS
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2022
·Vol. 153
·期 4
·1159-1169
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IF 2.936
Liang Jilei,Fan Mengwei,Wu Wenjie,Wu Mengmeng,Cai Wangshui,Xinxing Gao,Huang Tingting,Rui Haiyun
This study shows the successful encapsulation of sandwich cobalt–tungsten polyoxomolybdate (Na 12 [WCo 3 (H 2 O) 2 (CoW 9 O 34 ) 2 ], abbreviated as CoWPOM) guest in mesoporous metal–organic framework MIL-101 host under static condition via a facile post-synthesis strategy. Several characterizations including powder XRD, FTIR, TGA, SEM–EDS, UV–vis DRS, XRF, and low temperature N 2 adsorption–desorption isotherm demonstrate the incorporation and homogenous-distribution of the sandwich CoWPOM guests in cavities of the MIL-101 host. The CoWPOM@MIL-101 composite possesses a better synergistic effect, and it demonstrates an excellent oxidative desulfurization catalytic activity with the DBT removal of 98.1% and recyclability at least 5 times without obvious activity decrease. Graphical Abstract
研究领域:
材料科学
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催化化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2023
·
IF 3.8
Yu-Li Dang,Li-Xia Xie,Na-Na Fei,Ru Qiao,Zhan-Qi Cao,Li-Jie Liu,Guo-Xing Liu,Xin Zheng,Yun-Lai Ren,Xia Sheng,Sheng-Qiang Guo,Cao-Yuan Niu
Two porphyrin ligands with peripheral chelate groups linked at meso and β positions and their two new non-sandwich-type ytterbium(III)-porphyrin coordination compounds have been synthesized. New porphyrin compounds and the two coordination compounds were characterized by Nuclear Magnetic Resonance, High Resolution Mass Spectrum, Ultraviolet and visible, and fluorescence in the visible and Near Infrared (NIR) regions. The two Yb(III) complexes afforded the photoluminescence quantum yields of 2.0% and 1.6% for Yb(III) characteristic NIR emission in DMSO. Finally and importantly, the impact factors on the sensitization of Yb(III) NIR emission by porphyrin ligands via non-sandwich-type linkage were investigated by theoretical calculations and further measurements on fluorescent properties. It is proposed that the sensitization efficiency for the distance between the sensitizer and Yb(III) NIR emitter is better than that for conjugated degree of the peripheral porphyrin linkage.
研究领域:
化学
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光物理学
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DOI
高影响因子
RSC Advances
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2019
·Vol. 9
·期 13
·7440-7446
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IF 3.049
Fan Liu,Liming Wang,Weijun Yang,Enqing Liu,Can Huang
High purity birnessite was synthesized and exfoliated into a negatively charged monolayer structure. A positively charged 5, 10, 15, 20-tetrakis (4-aminophenyl) manganese porphyrin (MnTAPP) was synthesized. Driven by the electrostatic force and the coordination effect of the amino nitrogen on the manganese ion in birnessite, the single-layer birnessite was reassembled with MnTAPP, forming a new sandwich-type catalytic composite MnTAPP@bir. The structure and chemical properties of the composite were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Brunauer–Emmett analysis (BET). Electrocatalytic studies showed that the MnTAPP@bir exhibited an overpotential for water oxidation of 450 mV (at 10 mA cm−2) and a Tafel slope of 121.5 mV dec−1 compared to birnessite with 700 mV (at 10 mA cm−2) and 230 mV dec−1. Impedance spectroscopy results suggested that the charge transfer resistivity of MnTAPP@bir was significantly lower than that of birnessite, suggesting that MnTAPP in the interlayer increased the conductivity of birnessite. Through a chronoamperometry test, the new material also showed excellent stability within 4000 s.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Qizhan Zhang,Xuechun Wang,Jinxin Xie,Haoran Yin,Ge Song,Minghua Zhou
To improve the removal efficiency of low-concentration organic pollutants and enhance the oxidation efficiency of electro-Fenton (EF) process, a floating sandwich-type EF system (N/(A)/ D -EF) without aeration was constructed for the first time. This EF system electro-synthesized H 2 O 2 through the floating natural air diffusion electrode (NADE) without aeration, and regenerated Fe(II) effectively by the activated carbon fiber (ACF) interlayer, which significantly enhanced the process oxidation capacity since its • OH yield was 8.7 times that of the conventional EF system. In addition, the ACF interlayer could adsorb and enrich micro-pollutants and the generated • OH directly oxidize the pollutants adsorbed on the ACF, which enabled regeneration of ACF and maintained removal stability in 20 consecutive experiments. The removal rate constant ( k ) of carbamazepine by N/(A)/ D -EF process was 7.6 times and 2.1 times higher than that of conventional EF and ACF adsorption process , respectively. This process could efficiently remove mixed low-concentration organic pollutants (0.1 mg L -1 ) in domestic sewage and lake water with rate constant 1.6–7.1 times that of the conventional EF process but lower energy consumption. Meanwhile, the N/(A)/ D -EF process had a wider application range of sewage pH and conductivity, which was a promising process for removing low-concentration pollutants in wastewater.
研究领域:
环境科学
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废水处理技术
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DOI
PubMed
高影响因子
LUMINESCENCE
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2013
·Vol. 29
·期 4
·338-343
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IF 1.273
Yuan Zhou,Tao Zhou,Rui Zhou,Yonggang Hu
A rapid, simple, facile, sensitive and enzyme-amplified chemiluminescence immunoassay (CLIA) method to detect antibodies against porcine parvovirus has been developed. Horseradish peroxidase (HRP) and the detection antibody were simultaneously co-immobilized on the surface of gold nanoparticles using the electrostatic method to form gold nanoparticle-based nanoprobes. This nanoprobe was employed in a sandwich-type CLIA, which enables CL signal readout from enzymatic catalysis and results in signal amplification. The presence of porcine parvovirus infection was determined in porcine parvovirus antibodies by measuring the CL intensity caused by the reaction of HRP–luminol with H 2 O 2 . Under optimal conditions, the obtained calibration plot for the standard positive serum was approximately linear within the dilution range of 1:80 to 1:5120. The limit of detection for the assay was 1:10,240 ( S / N = 3), which is much lower than that typically achieved with an enzyme-linked immunosorbent assay (1:160; S / N = 3). A series of repeatability measurements using 1:320-fold diluted standard positive serum gave reproducible results with a relative standard deviation of 4.9% ( n = 11). The ability of the immunosensor to analyze clinical samples was tested on porcine sera. The immunosensor had an efficiency of 90%, a sensitivity of 93.3%, and a specificity of 87.5% relative to the enzyme-linked immunosorbent assay results. Copyright © 2013 John Wiley & Sons, Ltd.
研究领域:
兽医学
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纳米技术
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免疫学
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分析化学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
·
IF 7.1
Xueming Dang,Zhilian Song,Huimin Zhao
A novel photoelectrochemical (PEC) sensing strategy with an amplified signal was proposed based on polypyrrole/g-C 3 N 4 /WO 3 inverse opal photonic crystals triple heterojunction. The sandwich-type detection model was applied to increase the sensitivity and favor the assembly of heterojunction structure. The heterojunction among PPy, g-C 3 N 4 and WO 3 highly improved the separation of photo-generated charges. Meanwhile, WO 3 IOPCs with good optical performance were employed to enhance the light absorption of PEC detection electrode. With the simultaneous combination of these amplification techniques, the designed PEC sensor achieved high sensitivity with low limit of detection (LOD) as 0.004 nM (≈ 1.99 ng L −1 ) and admirable selectivity in the detection of oxytetracycline under visible light irradiation.
研究领域:
分析化学
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材料科学
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光化学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2018
·
IF 6.042
Tong Yang,Chun Mei Li,Jia Hui He,Bin Chen,Yuan Fang Li,Cheng Zhi Huang
Increasing demands for the sensitive, selective, visual, conveniently solid-phase-sensing film for disease-related biomarkers, electrospun nanofibrous films (ENFFs) are a novel sensing paltform because of the high surface area ratios, networked structures, and facile functionalization. In this research, carbon dots (CDs) and quantum dots (QDs) were doped inside and electrostatically assembled on electrospun nanofibers (ENFs), affording ratiometrically dual-emitting fluoresecent films. Because of the FRET process between CDs and QDs on NFs and the strong quenching response of QDs to Cu2+, the as-prepared NFs can visually detect Cu2+ with high sensitivity and selectivity based on ratiometric fluorescent signals. By exploiting the release of numerous Cu2+ from CuO nanoparticles (NPs) under acidic conditions, a sandwich-type immunoassay with CuO NPs-labeled antibody was developed for the detection of biomarker proteins via the response of dual-emitting and FRET-based NFs to different Cu2+ concentrations. Taking advantage of the ratiometrically fluorescent property of these ENFFs as well as the Cu2+-mediated signal amplification strategy, alpha fetoprotein can be detected with high sensitivity (detection limit of 8.3 pg/mL) and selectivity. This strategy demonstrates a promising candidate with a point-of-care assay for clinical diagnostics and biomedical research.
研究领域:
生物传感器
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分析化学
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生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2020
·
IF 6.785
Lei Yu,Qiao Zhang,Qi Kang,Bin Zhang,Dazhong Shen,Guizheng Zou
The design and development of novel electrochemiluminescence (ECL) systems with near-infrared (NIR) emission beyond 800 nm are promising for ECL evolution, especially for improving the throughput of the spectrum-resolved multiplexing ECL assay and biological imaging. Herein a biocompatible and environmentally friendly luminophore, that is, the methionine-stabilized Au nanoclusters (Met-Au NCs), are proposed to achieve efficient aqueous ECL of ∼835 nm with triethanolamine as coreactant. The Met-Au NCs not only demonstrate a 75 times enhanced ECL compared with the traditional Au NCs with bovine serum albumin as a capping agent but also can be employed as ECL tags to label proteins with a methionine linker and enable a highly sensitive NIR ECL bioassay. A sandwich-type NIR ECL immunosensor is constructed with the Met-Au NCs as tags and α-fetoprotein (AFP) as a model analyte and exhibits a wide linearity range from 3 fg·mL–1 to 0.1 ng·mL–1 with a limit of detection of 1 fg mL–1 (S/N = 3) as well as desired selectivity.
研究领域:
分析化学
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生物化学
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纳米技术
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2019
·
IF 9.518
Jia Li,Junlin He,Chengli Zhang,Jun Chen,Weiran Mao,Chao Yu
In this study, a dual-type responsive electrochemical biosensor was developed for the quantitative detection of α2,6-sialylated glycans (α2,6-sial-Gs), a potential biomarker of tumors. The gold nanorods (AuNRs), which exhibited great specific surface area, as well as good biocompatibility , was synthesized by the way of seed growth method. Furthermore, a biotin-streptavidin (biotin-SA) system was introduced to improve the immunoreaction efficiency. Accordingly, a label-free biosensor was fabricated based on AuNRs-SA for the quick detection of α2,6-sial-Gs by recording the signal of differential pulse voltammetry (DPV). Furthermore, to expand the ultrasensitive detection of α2,6-sial-Gs, a carboxylated single-walled carbon nanohorns/sulfur-doped platinum nanocluster (c-SWCNHs/S-PtNC) was synthesized for the first time as a novel signal label, which showed an excellent catalytic performance. The usage of c-SWCNHs/S-PtNC could significantly amplify the electrochemical signal recorded by the amperometric i-t curve. Herein, a sandwich type biosensor was constructed by combining the AuNRs-SA on the electrode and c-SWCNHs/S-PtNC (signal amplifier). The label-free biosensor possessed a linear range from 5 ng mL −1 to 5 μg mL −1 with a detection limit of 0.50 ng mL −1 , and the sandwich-type biosensor possessed a wide linear range from 1 fg mL −1 to 100 ng mL −1 with a detection limit of 0.69 fg mL −1 . Furthermore, the biosensor exhibited excellent recovery and stability, indicating its potential for use in actual samples.
研究领域:
生物化学
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分析化学
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纳米技术
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生物传感器
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 3
·1-10
·
IF 6.232
Yang Shuangshuang,Guo Yongcan,Fan Jingchuan,Yang Yujun,Zuo Chen,Bai Shulian,Sheng Shangchun,Li Junjie,Xie Guoming
A fluorometric assay was introduced to determine Acinetobacter baumannii ( A . baumannii ) in blood samples by utilizing Zr-MOFs both as functional coating for magnetic Fe 3 O 4 nanoparticles to provide modification surface (Zr-mMOF) and as fluorescein carrier to produce fluorescence signals (F@UIO-66-NH 2 ). Through strong Zr-O-P bonding, two distinct terminal phosphate-labeled A . baumannii and lipopolysaccharide (LPS) specific aptamers were attached onto Zr-MOFs to fabricate the magnetic core-shell capture probe (denoted as Zr-mMOF-p-Ab-Apt) and signal probe (denoted as F@UIO-66-NH 2 -p-LPS-Apt), respectively. After successive incubation with A . baumannii in blood samples and magnetic separation, the sandwich-type composite of capture probe/ A . baumannii cells/signal probe was treated with high concentration of anionic phosphate ions to destroy the nano-structure of UIO-66-NH 2 in the signal probe and fast release of fluorescein to produce amplified fluorescence signals. Due to the high aptamer modification efficiency of Zr-mMOF-p-Ab-Apt (up to 93%) and its strong affinity to A . baumannii , the enrichment efficiency of this capture probe has reached to 96.7%. Further, due to the high fluorescein loading efficiency of UIO-66-NH 2 and our novel amplification strategy to destroy F@UIO-66-NH 2 -p-LPS-Apt to release and amplify fluorescein signals at 512 nm in the presence of high concentration of anionic phosphate ions, the sensitivity of this method has reached 10 cfu mL −1 . This method allows enrichment and determination of A . baumannii within ~2.5 h. The limit of detection of A . baumannii in blood samples is 10 cfu mL −1 with a linear range of 10 1 –10 5 cfu mL −1 . This indicates the potential of this assay for diagnosis of bloodstream infection in early stage.
Schematic representation of sandwich–type fluorometric assay for Acinetobacter baumannii in blood samples with the capture probe (Zr-mMOF-p-Ab-Apt) and signal probe (F@UIO-66-NH2-p-LPS-Apt). The limit of detection is down to 10 cfu mL -1 with a linear range of 10 1 -10 5 cfu mL -1 .
研究领域:
分析化学
·
微生物学
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纳米技术
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生物医学工程
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Ming Li,Lei Jiao,Siquan Liu,Lianhua Zhang,He Li
Ratiometric signal transducing strategies can improve the precision of immunoassay , which possess the unique merits of spatial-resolved signal readout and self-correcting towards possible false positive results. In this work, a new ratiometric electrochemical immunosensor has been developed for reliable detection of Nuclear matrix protein 22 (NMP22). Bioinspired synthetic melanin nanospheres (SMNPs) were elaborately chosen for the following considerations: 1) SMNPs can supply good biocompatible biorecognition interface for antibody anchoring; 2) SMNPs can chelate a large amount of lead ions (Pb 2+ ) and copper ions (Cu 2+ ) to fabricate two spatial-resolved electrochemical signals with different response manners towards NMP22. SMNPs chelated with Pb 2+ were used for the immobilization of captured primary anti -NMP22. And SMNPs chelated Cu 2+ were employed to prepare signal labels after anchored with anti -NMP22 antibody. After sandwich-type immunoreaction, with the increasing concentration of NMP22, the stripping peak current of Pb 2+ decreases while the stripping peak current of Cu 2+ increases. Thus, ratiometric electrochemical signals could be provided for NMP22 detection. The immunosensor presented a linear concentration range from 0.013 U mL −1 to 6.7 U mL −1 with a limit of detection of 0.005 U mL −1 towards NMP22. Meanwhile, satisfactory reproducibility, stability and selectivity of the immunosensor were demonstrated.
研究领域:
分析化学
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生物传感器
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电化学
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免疫分析
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Liping Jiang,Jian Han,Faying Li,Jian Gao,Yueyun Li,Yunhui Dong,Qin Wei
In this work, we designed a novel and ultrasensitive sandwich-type electrochemical immunosensor for quantitative detection of α-fetoprotein (AFP), using β-cyclodextrin functionalized graphene (CD-GS) as the platform and platinum hybrid multiwalled carbon nanotubes adhered copper oxide (Pt@CuO-MWCNTs) as labels. CD-GS has high specific surface area, ideal dispersibility and good biocompatibility, which was used to efficiently capture more primary antibodies (Ab 1 ). Pt, CuO and multiwalled carbon nanotubes (MWCNTs) can be used as catalysts for the decomposition of hydrogen peroxide. The Pt@CuO-MWCNTs realized multiple amplified signals due to their synergy. Therefore, Pt@CuO-MWCNTs was used as the marker, combined with secondary antibodies (Ab 2 ) and this has the effect of multiple amplified signals to catalyze hydrogen peroxide. Under optimal conditions the designed immunosensor exhibited a wide linear range from 1 pg mL −1 to 20 ng mL −1 with a low detection limit of 0.33 pg mL −1 (S/N = 3) for AFP. The designed immunosensor showed good selectivity, reproducibility and stability, which could provide potential applications in clinical monitoring of AFP.
研究领域:
生物传感器
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纳米技术
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分析化学
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癌症诊断
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）