Bioactive Materials
·
2017
·Vol. 3
·期 1
·74-79
·
IF 0
Zhengao Wang,Jinquan Zeng,Guoxin Tan,Jingwen Liao,Lei Zhou,Junqi Chen,Peng Yu,Qiyou Wang,Chengyun Ning
To improve the osteointegration property of biomedical titanium, nano-architectured electroactive coating was synthesized through the electrochemical polymerization of dopamine and pyrrole. The highly binding affinity of Ca 2+ to the catechol moiety of doped dopamine enabled efficient interaction between polypyrrole/polydopamine nanowires and mineral ions. The results indicate that the PPy/PDA nanowires preserved its efficient electro-activity and accelerated the hydroxyapatite deposition in a simulated body fluid. The PPy/PDA nanowires coating could be applied to promote the osteointegration of titanium implant.
研究领域:
生物材料学
·
骨科学
·
表面工程
·
组织工程
·
生物医学工程
·
纳米医学
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DOI
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 40
·405401
·
IF 3.953
Chenzhi Wu,Tong Wu,Zhenbin Tang,Juguo Dai,Birong Zeng,Yiting Xu,Guorong Chen,Weiang Luo,Conghui Yuan,Lizong Dai
We report a simple metal ion-catechol coordination strategy to coat ruthenium-catechol polymer complex (TAC-Ru) on the surface of carbon nanotubes (CNT) to form a core–shell structure (abbreviated as CNT@TAC-Ru). This is achieved by firstly polymerizing catechol and boronic acid monomers on the surface of CNT to form a boronate ester polymer (BP) shell. Then, Ru3+ is used to etch the BP shell, and cleave the dynamic boronate ester bond, leading to the formation of a CNT@ruthenium-catechol coordination complex based on the coordinative efficiency of the catechol group. The electrocatalytic property of the CNT@TAC-Ru composite can be activated through electrochemical cycling treatment. The as-activated CNT@TAC-Ru exhibits evidently improved hydrogen evolution reaction (HER) performance with an overpotential of 10 mV in 1.0 M KOH at a current density of 10 mA cm−2 , which is better than that of commercial Pt/C (32 mV). And the long-term stability is also desirable. This work provides a pyrolysis-free method to form metal-polymer-carbon composite with high HER performance under the alkaline condition.
研究领域:
材料科学
·
电化学
·
能源转化与储存
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 14
·1088
·
IF 3.2
Liu Yong,Ke Binqing,Zhang Keju,Wu Longhua,Xia Qing
The environmental pollution caused by phenolic pollutants has attracted more and more attention, and developing simple and efficient detection methods for phenolic pollutants has aroused great interest of researchers. In this paper, a reduced graphene oxide (RGO)-modified electrode with high electrocatalytic activity was prepared by simple electrochemical reduction of graphene oxide (GO) on a glassy carbon electrode using cyclic voltammetry. The electrode-modified materials were systematically characterized by UltraViolet–Visible (UV–Vis), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), X-ray diffraction spectroscopy (XRD) and electrochemical impedance spectroscopy (EIS). Differential pulse voltammetry (DPV) was employed to detect catechol with high sensitivity. The effects of conditions such as the amount of GO suspension, cycle number of cyclic voltammetry reduction, pH value of the buffer solution, and accumulation time on the detection of catechol were investigated. Under optimal conditions, the oxidation peak current of catechol showed a good linear relationship with its concentration when the concentration of catechol was in the range of 1 × 10 −7 M ~ 1 × 10 −5 M. The linear equation was expressed as I (μA) = 2.1321 C (μM) + 4.2807 with a correlation coefficient of 0.9902, and the limit of detection (LOD) was 4.5 × 10 −8 M. Meanwhile, this electrochemical sensor has been proven to be applicable for the determination of catechol in an actual water sample.
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DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2025
·
IF 1.3
Ning Yang,Yi Liu,Jiannan Li,Meiqi Wang,Dongxin Wang,Zhuo Liu
Gastric perforation, which may be caused by damage to the gastric epithelium, can lead to the entry of food or gastric acid in the stomach into the peritoneum, causing diseases such as peritonitis and sepsis. In severe cases, it can lead to septic shock and pose a threat to life. Developing and preparing a material that has adhesiveness in a wet environment such as the surface of the stomach is a challenge. Therefore, we have successfully prepared a hydrogel membrane with wet adhesiveness. This hydrogel membrane is composed of glutaraldehyde-crosslinked polyvinyl alcohol (PVA) hydrogel modified by 3,4-dihydroxyphenylalanine (DOPA).The side chains of PVA molecules modified with DOPA achieve wet adhesion through the formation of hydrogen bonds between the catechol groups and the surface of the tissue substrate. It is used for suture-free repair of damaged gastric epithelium. According to the results of mechanical experiments, its wet adhesion lap shear strength to gastric tissue reaches 34.8 KPa, and the peeling strength reaches 24.5 KPa. The results of in vitro cell experiments show that the hydrogel has good biocompatibility. The hydrogel prepared by this simple method demonstrates adaptability to the gastric environment, making it promising for applications in gastric wound repair.
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产品关联
DOI
高影响因子
Biomaterials Science
·
2024
·
IF 5.8
Yanzhi Dong,Jiaojiao Wang,Ting Zhou,Jinbing Pan,Xu Wang,Shao-Kai Sun
Highly sensitive iron oxide nanoparticles with stable, safe and efficient surface functionalization, as potential substitutes for gadolinium-based contrast agents (GBCAs) with increasing biosafety concerns, exhibit great potential for high-performance magnetic resonance angiography (MRA). Herein, we developed ultrasmall catechol-PEG-anchored ferrite nanoparticles (PEG-UMFNPs) for highly sensitive MRA. The obtained nanoprobe has a high T1 relaxivity value (7.2 mM−1 s−1) due to its ultrasmall size and Mn doping. It has a suitable hydrodynamic size of 20 nm, which prevents rapid vascular extravasation and renal clearance and prolongs its blood circulation time. In vivo MRA at 3.0 T using the nanoprobe shows that the arteries and veins of rats, even blood vessels as small as 0.32 mm, are distinctly visible, and the contrast enhancement can last for at least 1 h. In addition, due to the outstanding contrast enhancement and long circulation time, the stenosis and recanalization process of the rat’s carotid artery can be continuously monitored with a single injection of the nanoprobe. Our study indicates that PEG-UMFNPs are outstanding MR imaging nanoprobes that can be used to diagnose vascular diseases without the biosafety issues of GBCAs.
研究领域:
医学影像学
·
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
IRANIAN POLYMER JOURNAL
·
2021
·Vol. 30
·期 4
·401-410
·
IF 1.899
Sun Dewen,Hou Pingping,Li Bo,Zhang Xiaodong
A series of catechol-modified epoxy resin biomimetic coatings (CE- X , X represents the weight fraction of catechol-modified epoxy resin, X = 0, 5%, 10%, 15%, 20%, 25%) with high adhesive strength on saturated concrete substrate were designed and synthesized. The chemical structures of the CE- X were confirmed by proton nuclear magnetic resonance ( 1 H NMR), carbon-13 nuclear magnetic resonance spectroscopy ( 13 C NMR), and Fourier transform infrared spectroscopy (FTIR). The thermal property of CE- X was characterized by thermogravimetric analysis (TGA). The adhesive properties were characterized by pull-off tests. Results showed that when the content of catechol–epoxy resin was under 20% by weight, the adhesive strength could be further increased by forming hydrogen bonds and coordination complexes in the interface of coating and saturated concrete of the substrate. When the content of catechol–epoxy resin was above 20% by weight, the pull-off tests showed cohesive failure, and the adhesive strength on saturated concrete substrate reached the maximum value of 4.61 ± 0.8 MPa, which was improved by ~ 3 MPa compared to that of the control sample. The adhesive properties of epoxy coatings on saturated concrete substrate could be improved by adding a proper amount of catechol groups. In addition, when it was immersed in water for 30 and 120 days, its adhesive strength was reduced by about 7.8% and 22%, respectively. This work provides a new method for designing and synthesizing protective coatings with high adhesive strength on the saturated concrete substrate. Graphic abstract
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2020
·Vol. 44
·期 2
·343-353
·
IF 2.419
Jiaojiao Xia,Pengyun Wang,Bin Zou,Onyinye Adesanya Idowu
Abstract Catechol level is an important indicator for evaluating the quality of tea. Therefore, the exploration of a simple and efficient quantitative detection method for catechol has an important significance. In this study, functionalized graphene oxide was synthesized by chemically modifying the surface of graphene oxide. The prepared carrier was covalently combined with biomimetic oxidase iron porphyrin (FePP, the active center of horseradish peroxidase). Ionic liquid as covalent coupling agents was designed as electronic bridge between biomimetic oxidase and graphene oxide. The novel biomimetic biosensor provided a detection range of 50.0–1600.0 μmol/L by modulating under the optimal conditions of the reaction system (FePP concentration is 1.5 × 10 –3 mol/L, pH 3.0, Nafion solution dosage 1% and temperature 25 °C), the detection limit is 0.09 μmol/L. The biosensor has excellent stability, repeatability and reproducibility, and is expected to be applied to the rapid detection of catechol in actual tea sample.. Graphic abstract
研究领域:
分析化学
·
食品科学
·
生物传感技术
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产品关联
DOI
PubMed
高影响因子
POLYMER INTERNATIONAL
·
2019
·Vol. 68
·期 6
·1084-1090
·
IF 2.433
Shaobin Xu,Dekun Sheng,Xiangdong Liu,Fance Ji,Yan Zhou,Li Dong,Haohao Wu,Yuming Yang
Recently, self-healing polymers have been one of the most intriguing academic fields due to the fact that they can increase their service lives and reduce the amount of waste. Here we designed and synthesized a novel telechelic polyurethane with dopamine (DA) end groups that are coordinated with Ca 2+ to form dynamic non-covalent bonds. The tensile stress of the designed polyurethanes increases with increase in the amount of metal cation added, while the strain at break slightly decreases. Rheological tests show that the ionic coordination between Ca 2+ and catechol can dynamically break and recombine under the stimulation of seawater, endowing the polymer with superior self-healing properties (up to 84% based on toughness). Therefore, the seawater-triggered self-healable, super tough polyurethane presented here is very intriguing as it has many potential applications especially in the marine environment. © 2019 Society of Chemical Industry
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Yong Liu,Rui Wang,Yuhan Zhu,Ruizhen Li,Jingdong Zhang
A photoelectrochemical (PEC) sensing platform was designed for catechol determination using CdS quantum dots (QDs), DNA and pristine graphene (PGR) nanocomposite film-modified electrode. In such a composite film-based PEC sensor, CdS QDs served as the photoelectric conversion element which produced photocurrent signal under visible light illumination; and DNA was designed as the biological recognition element which improved the PEC response of sensor toward catechol due to the interaction between DNA and catechol. To improve the electron transfer of the composite film, PGR with high electrical conductivity was doped, which significantly amplified the photocurrent signal of sensor. Based on such a CdS-DNA-PGR composite film-modified electrode, catechol showed a linear PEC response proportional to its concentration from 1.0 × 10 −8 to 1.0 × 10 −6 mol L −1 . The detection limit (3S/N) was estimated to be 4.9 × 10 −9 mol L −1 . The developed PEC sensor was successfully applied to determine trace catechol in water samples.
研究领域:
分析化学
·
环境科学
·
生物传感技术
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产品关联
DOI
高影响因子
Materials
·
2016
·Vol. 9
·期 4
·282
·
IF 2.728
Dawei Li,Jun Zang,Jin Zhang,Kelong Ao,Qingqing Wang,Quanfeng Dong,Qufu Wei
Carbon xerogel-zinc oxide (CXZnO) composites were synthesized by a simple method of sol-gel condensation polymerization of formaldehyde and resorcinol solution containing zinc salt followed by drying and thermal treatment. ZnO nanoparticles were observed to be evenly dispersed on the surfaces of the carbon xerogel microspheres. The as-prepared CXZnO composites were mixed with laccase (Lac) and Nafion to obtain a mixture solution, which was further modified on an electrode surface to construct a novel biosensing platform. Finally, the prepared electrochemical biosensor was employed to detect the environmental pollutant, catechol. The analysis result was satisfactory, the sensor showed excellent electrocatalysis towards catechol with high sensitivity (31.2 µA·mM−1), a low detection limit (2.17 µM), and a wide linear range (6.91–453 µM). Moreover, the biosensor also displayed favorable repeatability, reproducibility, selectivity, and stability besides being successfully used in the trace detection of catechol existing in lake water environments.Keywords:carbon xerogel;ZnO;laccase;phenolic biosensor
研究领域:
材料科学
·
环境科学
·
生物传感
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产品关联
DOI
PubMed
高影响因子
SENSORS
·
2014
·Vol. 14
·期 2
·3543-3556
·
IF 2.048
Jiapeng Fu,Hui Qiao,Dawei Li,Lei Luo,Ke Chen,Qufu Wei
The study compared the biosensing properties of laccase biosensors based on carbon nanofibers (CNFs) and copper/carbon composite nanofibers (Cu/CNFs). The two kinds of nanofibers were prepared by electrospinning and carbonization under the same conditions. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy were employed to investigate the morphologies and structures of CNFs and Cu/CNFs. The amperometric results indicated that the Cu/CNFs/laccase(Lac)/Nafion/glass carbon electrode (GCE) possessed reliable analytical performance for the detection of catechol. The sensitivity of the Cu/CNFs/Lac/Nafion/GCE reached 33.1 μA/mM, larger than that of CNFs/Lac/Nafion/GCE. Meanwhile, Cu/CNFs/Lac/Nafion/GCE had a wider linear range from 9.95 × 10−6to 9.76 × 10−3M and a lower detection limit of 1.18 μM than CNFs/Lac/Nafion/GCE. Moreover, it exhibited a good repeatability, reproducibility, selectivity and long-term stability, revealing that electrospun Cu/CNFs have great potential in biosensing.Keywords:electrospinning;copper/carbon composite nanofibers;laccase biosensor;catechol detection;electrochemical properties
研究领域:
材料科学与工程
·
环境科学与工程
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 13
·4625
·
IF 3.748
Liudi Ji,Qi Wang,Lianhui Peng,Xiaoyu Li,Xiaoming Zhu,Peng Hu
It is quite important to develop sensitive, simple, and convenient methods for the simultaneous determination of Hydroquinone (HQ) and Catechol (CC) due to their wide existence, the difficulty of degradation, and the high toxicity. Herein, Cu-TCPP nanosheets were prepared inN,N-dimethylformamide (DMF) through the solvent exfoliation method. The morphology and electrochemical performance of Cu-TCPP were characterized, revealing its stacked sheet structure with abundant pores, a fast electron transfer ability, and a large electrode active area. Using Cu-TCPP nanosheets as the sensitive material to modify the glassy carbon electrodes (Cu-TCPP/GCEs), it was found that they had an obvious enhancement effect on the electrochemical oxidation currents of HQ and CC. The signal enhancement mechanism was explored. The Cu-TCPP nanosheets not only enhanced the accumulation abilities of HQ and CC, but also improved their apparent catalytic rate, displaying high sensitivity for HQ and CC. The values of the detection limit were calculated to be 3.4 and 2.3 nM for HQ and CC. A satisfactory recovery was obtained when this method was used in measuring HQ and CC in the water samples.Keywords:hydroquinone;catechol;electrochemical sensor;Cu-TCPP;2D MOFs
研究领域:
环境科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
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