SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Yueyue Qian,Chuang Ma,Shupeng Zhang,Juanjuan Gao,Maoxiang Liu,Kangjun Xie,Shuang Wang,Kuan Sun,Haiou Song
A highly conductive and electrochemically active film has been successfully fabricated by combining beta-cyclodextrin with acid-treated poly(3, 4-ethylenedioxythiophene):polystyrene (denoted as CD-f-PEDOT:PSS). The unique properties of the high performance CD-f-PEDOT: PSS sensor was investigated by utilizing X-ray photoelectron spectroscopy, atomic force microscope, cyclic voltammetry and amperometric i-t , etc. The CD-f-PEDOT:PSS film exhibits high-sensitivity towards dopamine (DA) and catechol (CT) without employing expensive noble metal or indium tin oxide (ITO) substrate and consuming much more time to polish the surface of traditional electrodes. The detection limits (S/N = 3) for DA and CT in phosphate buffer solutions (PBS, pH = 7.4) are 9.596 nM and 0.0275 μM, respectively. Furthermore, the CD-f-PEDOT: PSS film sensor exhibits good anti-interference and reproducibility. The encouraging results as well as facile preparation method suggest the CD-f-PEDOT: PSS film sensor is a promising alternative electrode to traditional ones such as ITO, gold or glassy carbon electrodes.
研究领域:
生物传感器
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2016
·
IF 2.822
Shiqiang Cui,Li Li,Yaping Ding,Jiangjiang Zhang
The Co 3 O 4 electro-catalysts with the mesoporous structure were prepared by the sacrificing template method. The chemical composition , structural and morphological characterizations of Co 3 O 4 were examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption (BET). The electrochemical properties of the meso-Co 3 O 4 were investigated by differential pulse voltammetry (DPV) and cyclic voltammetry (CV) for the simultaneous detection of hydroquinone (HQ) and catechol (CC) in the phosphate buffer media (PBS). Based on the meso-Co 3 O 4 modifier electrode, a sensitive electrochemical sensor for phenolic compounds was successfully fabricated. Under optimal conditions, the detection limits of HQ and CC were found to be 0.1 and 0.1 μΜ (S/N = 3), respectively. The outstanding catalytic capability of meso-Co 3 O 4 catalysts may be associated with their large surface area provided by mesoporous structure.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2015
·Vol. 27
·期 6
·1490-1497
·
IF 2.138
Jiapeng Fu,Zengyuan Pang,Jie Yang,Zhanping Yang,Jianhua Cao,Yang Xu,Fenglin Huang,Qufu Wei
We fabricated a novel hierarchical composite mat composed of electrospun cellulose nanofibers decorated with Ag-doped ZnO (Ag-ZnO) nanoparticles and further demonstrated its potential application as the efficient laccase (Lac) biosensor substrate material. The cyclic voltammograms revealed that the Ag-ZnO/cellulose nanofibrous mat provided an excellent microenvironment for Lac immobilization and benefited direct electron transfer of Lac. The fabricated Lac/Ag-ZnO/cellulose/GCE exhibited a highly sensitive detection of catechol with a wide linear range from 0.995 to 811 µM and a low detection limit of 0.205 µM. The results indicated that Ag-ZnO/cellulose nanofibers were the promising nanostructured materials for the construction of different biosensors.
研究领域:
材料科学
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生物传感技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2015
·Vol. 140
·期 23
·7939-7947
·
IF 4.107
Yi Hong Huang,Jian Hua Chen,Li Jing Ling,Zhen Bo Su,Xue Sun,Shi Rong Hu,Wen Weng,Yang Huang,Wen Bing Wu,Ya San He
In the present study, carbon nanocages (CNCs) decorated with gold nanoparticles (AuNPs) with diameters of 2–5 nm were synthesized by simply mixing their solutions. The sizes of the AuNPs are small enough to diffuse into the inside of the CNCs by electrostatic incorporation and their morphologies were characterized by transmission electron microscopy, X-ray diffraction, energy dispersive spectrometry, Raman spectrometry and ultraviolet visible absorption spectra. The AuNPs@CNCs modified electrode was prepared for simultaneous highly sensitive determination of catechol (CC) and hydroquinone (HQ). This modified electrode demonstrated fantastic eletrochemical catalytic activities towards CC and HQ by cyclic voltammetry and differential pulse voltammetry. The calibration curves showed a linear response between the peak currents and the concentrations of CC and HQ. A wide dynamic detection range of 1.0–250.0 μM and 0.1–200.0 μM with a low detection limits (S/N = 3) of 0.0986 μM and 0.0254 μM can be obtained for CC and HQ respectively. The present method was successfully employed for determination of CC and HQ in a practical sample.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Haiguan Yang,Junqi Zha,Peng Zhang,Yuemei Qin,Tao Chen,Fanggui Ye
A simple method was proposed for the preparation of CeVO 4 . The as-synthesized CeVO 4 was, for the first time, demonstrated to exhibit both peroxidase-like and oxidase-like activity, which catalyzes the oxidation of 3, 3′, 5, 5′-tetramethylbenzidine (TMB) to form a typical blue solution in the presence or absence of H 2 O 2 . Moreover, the mechanism of its dual-enzyme activity was investigated in detail. The Michaelis constant ( K m ) value for CeVO 4 (0.136 mM) was lower than that of horseradish peroxidase (0.424 mM) with TMB as the substrate. Interestingly, hydroquinone (H 2 Q), dihydroxybenzene isomer, undergoes reduction accompanying the oxidation of TMB by the CeVO 4 oxidase mimic along with a visible color change, while the other two dihydroxybenzene isomers, i.e., resorcinol (RC) and catechol (CC), do not. Based on these findings, a colorimetric platform was developed to discriminate H 2 Q from RC and CC. Under optimal conditions, a linear relationship between the H 2 Q concentration and absorbance was observed from 0.05 to 8 μM, and a limit of detection of 0.04 μM was achieved. Moreover, this colorimetric platform can selectively reveal H 2 Q concentrations in the presence of other dihydroxybenzene isomers.
研究领域:
生物化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
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2020
·Vol. 31
·期 1
·25-32
·
IF 1.399
Meiqin,Zhu Jingjing,Fan Rongrong,Wang Yujie,Lv Zhaojun,Han Yongming,Peng Jun,Zheng Xinyu,Lin Ruiyu
High specific surface area activated carbon prepared by Perilla frutescens (PFHSAAC) was modified on the surface of the glassy carbon electrode (GCE) by drop-coating method to construct a PFHSAAC/GCE. The electrochemical properties of the modified electrode were investigated in detail by some electrochemical methods such as cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). Experiment results show that the modified electrode has excellent redox activity and distinction capability toward the two isomers of catechol (CC) and hydroquinone (HQ). The separation of oxidation peak potential for HQ and CC of DPV is 112.8 mV. Under the optimal conditions, the oxidation peak currents of HQ and CC show good linear relationships with their concentrations in the ranges of 1.0 × 10-6-2.0 × 10-4 and 1.0 × 10-6-1.5 × 10-4 mol L-1, respectively. The limits of detection for HQ and CC are 3.57 × 10-7 and 4.23 × 10-7 mol L-1, respectively. The PFHSAAC/GCE exhibits good stability, repeatability and sensitivity. The developed method was used to determine HQ and CC in water samples with best results.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Xinyu Zheng,Yingcai Hu,Huizi Li,Bolun Han,Ruiyu Lin,Biao Huang
Metal-organic frameworks (MOFs) of type ZIF-67 via simple heat- treatment process was employed to prepare N-doped carbon nanotube frameworks (NCNTFs). Whereafter, an electroanalysis method using NCNTFs as the modify material was constructed for selective sensing of hydroquinone (HQ) and catechol (CC). Both HQ and CC can be independently determined in mixed solutions. The anodic peak currents of HQ increase linearly in two concentration ranges, one from 0.8 to 100 and another from 100 to 200 μM. Also, the anodic peak currents for CC increase linearly in the concentration ranges of 0.8–40 μM and 40–120 μM. The detection limits are 0.17 μM and 0.12 μM for HQ and CC, respectively. The sensor was used to detect these two isomers in spiked lake water, and recoveries for HQ and CC are 91.6–95.0% and 95.3–105.0%, respectively.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Chao Hu,Haiping Huang,Han Sun,Yu Yan,Fang Xu,Jinsheng Liao
Dual-template molecularly imprinted polymer/carbon nanotubes/grassy carbon electrode (MIP/CNTs/GCE) was constructed by electropolymerizing a layer of bimolecular imprinted film with melamine (Mel) as functional monomer , hydroquinone (HQ) and catechol (CC) as template molecules on CNTs modified GCE. The morphology, structure and electrochemical properties of MIP/CNTs/GCE were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and electrochemical technology, respectively. The experimental parameters for the construction of sensor were optimized in detail, which includes the reagent molar ratio, the electropolymerization cycles, the elution time and the pH value of the electrolyte. Under the optimal conditions, the simultaneous detection of HQ and CC was realized via cyclic voltammetry (CV) and differential pulsed voltammetry (DPV). Compared with CNTs/GCE, molecularly imprinted membrane can significantly enhance its response current to HQ and CC. At the same time, both the linear range of HQ and CC measured by DPV are 10–100 μM, with the detection limits of 3.1 μM and 3.5 μM, respectively. The electrode also owned good reproducibility and stability. Finally, MIP/CNTs/GCE was successfully utilized for the detection of HQ and CC in river water.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Yan Fang Cheng,Jie Yu Zhang,Yun Bing Wang,Chang Ming Li,Zhi Song Lu,Xue Feng Hu,Li Qun Xu
The titanium (Ti) and its alloys have been widely used for dental and orthopedic implants. However, the Ti-based implants may suffer from bacterial infection, which would result in insufficient healing, implant failure and repeated surgical intervention. It is of great interest to inhibit the bacterial adhesion and colonization on the Ti-based implants by introducing proper surface coatings. In this work, a simple method was employed to synthesize the water-soluble catechol-containing chitosan (CACS). The CACS coatings can be deposited onto various substrate surfaces and exhibit substrate-independent behavior. The CACS-coated Ti surfaces were further deposited with silver nanoparticles (Ag NPs) via in-situ reduction of Ag + ions using catechol moieties as the reducing agents. The resulting AgNPs/CACS-coated Ti surfaces exhibit antibacterial properties and can prevent the surface adhesion of bacterial cells, as evidenced by the inhibition zone test, live/dead bacterial staining assay and spread plate method. In addition, they show negligible cytotoxicity to L929 mouse fibroblast cells.
研究领域:
生物医学工程
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材料科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Tao Hu,Qiang Liu,Qinze Liu,Yang Wu,Congde Qiao,Jinshui Yao
Green composite adsorbent with low cost and high efficiency towards toxic Cr(VI) removal from the polluted water has a broad application prospect. In this work, a mussel-inspired Cr-adsorbent namely poly(catechol tetraethylenepentamine-p-phenylenediamine)@as-prepared cellulose (PAC@AC) is successful fabricated via catechol-amine copolymer adhering onto as-prepared cellulose (AC). The detailed characterizations of product are run with SEM, FT-IR, TGA , XRD, EDS and XPS analysis. Many factors are investigated to affect the adsorption of Cr(VI) by PCA@AC, including ratio of AC to PCA, adsorbent dosage, contact time, initial Cr(VI) concentration, pH, temperature and exterior ions. The maximum adsorption capacity of PCA@AC for Cr (VI) is obtained by 507.61 mg/g at 30°C using Langmuir model, which is very higher than the pure AC. The removal ability of PCA@AC is ascribed to the electrostatic interaction and reduction reaction of Cr(VI) to Cr(III) during the adsorption process. In addition, the adsorption process is spontaneous and endothermic, not require any external energy. The composite adsorbent (PCA@AC) has great potential for Cr(VI)-wastewater purification with an excellent chelating ability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2020
·
IF 10.257
Tao Liu,Qiang Zhao,Ying Xie,Danfeng Jiang,Zhenyu Chu,Wanqin Jin
Currently, the large-scale and controllable fabrication of nanostructures on substrates remains a great challenge for further practical applications. In this work, a novel 3D aloe-like Au–ZnO nanocomposite was designed for in situ synthesis on an ITO substrate, achieving real-time detection of trace catechol (CC) in water. A seed-assisted hydrothermal approach was proposed to control the crystal distribution and growth direction to build a ZnO aloe-like architecture. To eliminate the natural weak conductivity of ZnO, Au nanoparticles were further deposited on all ZnO arrays to construct Au–ZnO micro/nanostructures. The synergetic effects derived from the aloe-like ZnO with a large specific area and Au nanoparticles with high conductivity resulted in both high electrocatalysis and fast electron transfer in enzymatic reactions . After laccase immobilization , the as-prepared biosensor exhibited specific recognition of catechol among other dihydroxybenzenes and phenol with an ultrahigh sensitivity of 131 μA mM −1 , as well as an extremely wide linear range from 75 nM to 1100 μM and an ultralow detection limit of 25 nM. In addition, in the detection of real lake samples, this biosensor showed satisfactory anti-interference ability and provided reliable assay results.
研究领域:
材料科学
·
生物医学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2020
·Vol. 305
·期 9
·2000258
·
IF 3.853
Yuan Chen,Xiaoqing Wu,Junfu Wei,Hailiang Wu
Co-deposition of catechol and polyethyleneimine onto polyethylene phthalate (PET) fiber by mussel-inspiration is conducted and subsequently utilized to prepare polyethyleneimine/catechol modified PET fiber reinforced composites (polyethyleneimine (PEI)/CCh-m-PET FRCs). The surface polarity is characterized through the dynamic contact angle. The mechanical performances including tensile, flexural, and short beam shear strength are evaluated. Additionally, the single-bundle pull-out tests are carried out with the double-end method. The analysis reveals that compared to the untreated PET reinforced composite, there are 33.49% and 34.35% increase of the critical load and peak load for PEI-modified specimens, respectively, meanwhile the critical debonding energy and pull-out energy calculated increase by 28.46% and 24.47%, respectively. The interlaminar shear strength and interfacial shear strength of modified PET can reach the values of 145.89 and 20.88 MPa, which are significantly improved by 58.01% and 70.94%.
研究领域:
材料科学
·
生物仿生学
✓ 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）