International Journal of Electrochemical Science
·
2024
·
IF 1.3
Aiping Wang,Aihua Zhou,Jing Sui
In this work, an electrochemical sensor for simultaneous detection of hydroquinone (HQ) and catechol (CC) has been developed based on nanocomposite of Au nanoparticles (AuNPs) decorated poly(3,4-ethylenedioxythiophene) (PEDOT) nano-horns. AuNPs-PEDOT nanocomposite with a novel porous structure formed by lots of interconnected horn-like PEDOT has been facially prepared via a one-pot interfacial polymerization. The top and root-end diameters of horn-like PEDOT are around10 nm and 100 nm, respectively, while AuNPs with diameter ranging from 3 to 10 nm are evenly dispersed on PEDOT. The as-synthesized AuNPs-PEDOT nanocomposite modified glassy carbon electrode (GCE) exhibits high electrocatalytic property and excellent selectivity towards the redox reaction of HQ and CC. The AuNPs-PEDOT/GCE can simultaneously detect HQ and CC with detection limits (S/N = 3) of 0.38 µM and 0.43 µM for HQ and CC respectively. Moreover, the modified electrode has excellent selectivity and is successfully applied to detect HQ and CC in real tap water sample with recovery of 95.2–104.1% and 96.2–105.6%, respectively.
研究领域:
分析化学
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纳米材料科学
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环境监测
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 17
·8083-8089
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IF 3.3
Zhaofei Liu,Lili Zhang,Yuhang Wei,Zhiming Chen
Rapid and sensitive detection of hazardous compounds is of great importance for sensors. This work presents the immobilization of laccase on Fe3O4@MF-CNTs nanocomposites (Fe3O4@MF-CNTs-lac) for the fast and sensitive detection of catechol. Electrochemical impedance spectroscopy (EIS) results revealed that the combined effect of Fe3O4@MF and carbon nanotubes (CNTs) facilitates electron transfer between laccase and the electrode. Amperometric curves indicated that the Fe3O4@MF-CNTs-Lac biosensor can respond rapidly to a substrate and detect catechol within 0.5 s. The Fe3O4@MF-CNTs-Lac biosensor possesses a low detection limit of 0.84 μM (S/N = 3) with a linear range of 1–3000 μM, as well as high sensitivity, remarkable organic compound tolerance, and good selectivity, reproducibility and stability. The catechol biosensing assays revealed that Fe3O4@MF-CNTs-Lac can be operated in acidic water environments. Most importantly, the Fe3O4@MF-CNTs-Lac biosensor exhibited reliable results in real water sample analysis. The outstanding biosensing performances reveal that the Fe3O4@MF-CNTs-Lac biosensor has a technical application in the treatment of catechol to avoid catechol pollution.
研究领域:
环境科学
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生物技术
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电化学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
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IF 3.973
Zhenqiang Shi,Yi Zhang,Rong Dai,Shengqiu Chen,Man Zhang,Lunqiang Jin,Jingxia Wang,Weifeng Zhao,Changsheng Zhao
In this study, we proposed a green, facile and low-cost approach for the fabrication of multifunctional particles with robust bacteria removal capability and on-demand biofilm eradication activity. Based on mussel-inspired coating of catechol and hexanediamine on Fe 3 O 4 in aqueous solution, magnetic poly(catechol-hexanediamine) particles (Fe 3 O 4 @HDA) were prepared successfully in 1 h, at room temperature. Microbiological experiments demonstrated the Fe 3 O 4 @HDA particles could capture bacteria in water efficiently. Meanwhile, with an integration of magnetic response property and near-infrared-triggered photothermal bactericidal activity, the Fe 3 O 4 @HDA particles showed a high potential for biofilm targeting and in-situ eradication. We believe that the rationally designed magnetic poly(catechol-hexanediamine) particles could extend the applications of smart antimicrobial agents to industrial fields such as water disinfection and biofouling clean-up.
研究领域:
环境科学
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微生物学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL QUALITY
·
2016
·Vol. 45
·期 6
·1933-1940
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IF 2.238
Guojuan Gan,Rongwu Mei,Lin Qiu,Huachang Hong,Qingjun Wang,Asit Mazumder,Shikai Wu,Xiangliang Pan,Yan Liang
Catechol, nitrite, and dissolved metals are ubiquitous in source drinking water. Catechol and nitrite have been identified as precursors for halonitromethanes (HNMs), but the effect of metal ions on HNM formation during chlorination remains unclear. The main objective of this study was to investigate the effect of metal ions (Fe 3+ , Ti 4+ , Al 3+ ) on the formation of trichloronitromethane (TCNM) (the most representative HNM species in disinfected water) on chlorinating catechol and nitrite. Trichloronitromethane was extracted by methyl tert-butyl ether and detected by gas chromatography. The results show that metal ions promoted the formation of TCNM and that the enhancement efficiency followed the order of Fe 3+ > Ti 4+ > Al 3+ . Trichloronitromethane formation increased greatly within 2 h, and a basic condition (pH 8–9) favored TCNM formation more than acidic or neutral conditions. The conjoint effect of the metal–ion mixtures was shown to be similar to that of the single metal ion having the highest promoting effect on TCNM formation. Our results strongly suggest that metal ions play a significant role in enhancing TCNM formation. Core Ideas Metal ions increased TCNM formation during chlorination of catechol and nitrite. Type and concentration of metal ions affected TCNM yield. Effect of metal ions on the formation of TCNM varied with pH. Conjoint effect of metal ions on TCNM formation was not obvious.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
BMC Oral Health
·
2026
·
IF 3.1
Feng Zhenchong,Wang Hongrui,Huang Mengyu,Zhang Yu,Chen Manling,Jiang Haoyu,Lu Cheng,Yiu Cynthia Kar Yung,Li Kang
Objectives To synthesize a novel chlorinated catechol monomer, N-(2-chloro-4,5-dihydroxyphenethyl) methacrylamide (Cl-DMA), and evaluate its efficacy as a primer in enhancing dentin bond durability and imparting antibacterial properties. Methods Cl-DMA at varying concentrations (0, 1, 3, and 5 wt%) dissolved in 50% DMSO/H₂O were applied as primer agent to dentin surfaces for 60 s. The interaction between Cl-DMA with type I collagen was assessed by ATR-FTIR and molecular docking. The effects of Cl-DMA primers on dentin bond strength and durability were comprehensively evaluated using degree of conversion (DC), micro-tensile bond strength (µTBS) test, fracture pattern observation, nanoleakage evaluation, and in situ zymography analysis. The antibacterial properties of Cl-DMA were assessed through colony forming unit (CFU) counting, CCK-8 assay, crystal violet staining, scanning electron microscopy (SEM) observation, and live/dead bacterial fluorescence staining. The assessment of Cl-DMA-induced cytotoxicity was performed by measuring cell viability with a CCK-8 kit and fluorescence staining. Results Cl-DMA potentially interacted with type I collagen via hydrogen bond. Pretreatment with Cl-DMA solutions effectively maintained resin-dentin bond strength, preserved stability of the bonded interface, and inhibited endogenous protease activity. Antibacterial effects against Streptococcus mutans biofilm formation and bactericidal capacity improved gradually with increasing Cl-DMA concentration. Cl-DMA was well-tolerated by the cells compared with Bis-GMA, with no observed cytotoxicity at doses up to 50 µg/mL. Conclusions Pretreating dentin surface with Cl-DMA primer for 60 s can effectively stabilize the bonded interface and exhibit significant antibacterial efficacy.
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2021
·
IF 5.161
Longfang Ren,Congcong Lin,Pingchuan Lei
A highly effective way is found to incorporate dopamine (DA) containing catechol groups into waterborne polyurethane backbone. Firstly, prepolymer polyurethane (PPU) containing sulfydryl were created through stepwise polymerization in which isophorone diisocyanate (IPDI) was as hard segment, polyethylene glycol (PEG)(Mn=600) was as soft segment, dimethylolpropionic acid (DMPA) was as hydrophilic monomer and monothioglycerol (MON) was as chain extender. Then a series of catechol-based waterborne polyurethanes (MON-PPU-DOMA) was obtained by introducing methacrylamide dopamine (DOMA) into polyurethane backbone via thiol-ene click chemistry. FT-IR, 1 H-NMR and UV–vis spectra showed that DOMA was successfully incorporated into polyurethane backbone. TG and mechanical properties testing results indicated that the heat resistance and tensile strength of MON-PPU-DOMA films were obviously improved. Moreover, MON-PPU-DOMA/Fe 3+ complex was obtained by MON-PPU-DOMA with Fe 3+ triggered via adjusting pH and their color and state change was apparent, which also made it possible for MON-PPU-DOMA/Fe 3+ to become an injection adhesion material. MON-PPU-DOMA was used to bonding different substrates. The results showed that the lap shear strength of MON-PPU-DOMA to iron sheet was 3.23 MPa, which was obviously bigger than that of MON-PPU without DOMA. The introduction of DOMA can significantly improve adhesive ability of polyurethane. Because it is difficult to dissolve in DMF, MON-PPU-DOMA emulsion has the potential of being an environmentally friendly coating on the surface of iron substrates.
研究领域:
材料科学
·
化学
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产品关联
DOI
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
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生物仿生学
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产品关联
DOI
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
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生物医学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Environmental Science-Processes & Impacts
·
2020
·Vol. 23
·期 1
·109-116
·
IF 3.238
Ziyu Zhao,Quan Chen,Hao Li,Di Lang,Meixuan Wu,Dandan Zhou,Bo Pan,Baoshan Xing
Environmentally persistent free radicals (EPFRs) have drawn increasing attention. It is reported that EPFR formation is dependent on the presence of transition metals; however the size of the metal particles is ignored. In this study, we hypothesized that transition metals in smaller particle sizes could more efficiently promote the generation of EPFRs and thus have higher risks. Nanosized hematite (nanoHMT) and microsized hematite (microHMT) were studied and compared. We monitored the degradation of catechol and the generation of EPFRs under both dark and ultraviolet light conditions. Catechol degradation was inhibited in the presence of hematite in the dark, with more significant inhibition by nanoHMT. However, under ultraviolet light, catechol degradation was promoted by hematite, with more significant promotion by nanoHMT. The yield of free radicals in the nanoHMT system was always higher than that in the microHMT system. More dimers were detected in the nanoHMT system, which may have played an important role in stabilizing free radicals. More trivalent Fe was converted to divalent Fe in the nanoHMT system than in the microHMT system. The relatively more active sites for the catechol interaction promoted EPFR generation. These results highlighted that size-dependent reactions should be well considered when predicting the environmental behavior and risks of organic contaminants.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
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
·
生物传感技术
·
环境监测
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产品关联
DOI
高影响因子
Acta Biomaterialia
·
2021
·
IF 8.947
Guoru Dai,Lu Sun,Jing Xu,Guizhen Zhao,Zheng Tan,Chen Wang,Xiaolian Sun,Keming Xu,Wenying Zhong
Hydrogels have drawn considerable attention in the field of drug delivery, yet their poor mechanical strength and uncontrollable drug release behavior have hindered further applications in clinical practice. Taking utility of metal–ligand coordination for structurally reinforcing the hydrogel network, we report design and synthesis of magnetic nanocomposite hydrogels (HA-DOPA·MNPs) that are crosslinked by DOPA–Fe(III) coordination existing between dopamine-conjugated hyaluronan (HA-DOPA) and iron oxide magnetic nanoparticles (MNPs). The MNPs in the nanocomposite hydrogel not only serve as structural crosslinkers, but also facilitate magnetic hyperthermia and on-demand release of doxorubicin (DOX) in HA-DOPA·MNPs/DOX hydrogels, for release rate of DOX accelerates when external alternating magnetic field (AMF) is ON, and it restores to a slow pace when AMF is OFF. Importantly, HA-DOPA·MNPs/DOX hydrogel shows a longer retention time than HA-DOPA/DOX gel or DOX solution in vivo . Further experiments confirm the efficacious anticancer potency of HA-DOPA·MNPs/DOX in vitro and in vivo , that is mediated by a combination therapy consisting of chemotherapy (DOX) and hyperthermia (MNPs). In contrast, single-modality treatment (DOX or hyperthermia only) fails to show an equivalent efficacy at the same dose. Statement of significance This study reports the design of a class of magnetic nanocomposite hydrogel (HA-DOPA·MNPs) that was structurally reinforced by DOPA–Fe (III) coordination between HA-DOPA and iron oxide MNPs. On one hand, MNPs served as crosslinking centers for structurally reinforcing the nanocomposite hydrogel; on the other hand, MNPs facilitated temperature rise under an external MNPs, which prompted on-demand drug release as well as a combination therapy. Comparing to single modality treatment (chemotherapy or hyperthermia alone), the HA-DOPA·MNPs/DOX formulation with AMF demonstrated better efficacy against proliferation of tumor cells (A375) both in vitro and in vivo . We believe that design of HA-DOPA·MNPs/DOX hydrogel in this report provides a general approach to fabricate structurally-reinforced nanocomposite hydrogels for on-demand drug delivery and efficacious combination therapy.
研究领域:
药物递送系统
·
纳米技术
·
生物医学工程
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癌症治疗
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材料科学
✓ 已验证
产品关联
DOI
PubMed
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
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）