Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 16
·3035-3046
·
IF 4.543
Rui Wang,Yi Xie,Tao Xiang,Shudong Sun,Changsheng Zhao
Mussel-inspired polymer/dopamine coatings often require several separated steps including the grafting of dopamine onto macromolecules and the deposition of mussel-inspired macromolecules. Herein, we attempt to investigate the direct conjugation between catechol and O-sulfated chitosan to fabricate coatings onto polyethersulfone (PES) ultrafiltration membranes; with the addition of hexanediamine, the coating compositions and membrane performances were further adjusted. The conjugation was confirmed by 1H nuclear magnetic resonance (1H NMR) and the coatings were characterized by X-ray photoelectron spectroscopy (XPS). The as-prepared O-sulfated chitosan coatings could enhance the protein antifouling property of PES membranes. Subsequently, the coatings could be further sulfated to obtain N,O-sulfated chitosan coatings, which confer PES membranes with richer functionality. The membranes with N,O-sulfated chitosan coatings exhibited high anticoagulant activity, low platelet activation, low complement activation, as well as low hemolysis ratios, and were favourable for cell proliferation, demonstrating excellent biocompatibility. Meanwhile, the fluxes of the membranes exhibited durable sensitivity to ionic-strength, which also reflected the stability against electrolyte solutions. Besides, the coatings were proven to have applicability on different polymeric membranes. Hence, it was believed that this approach could provide another option to endow membranes with excellent biocompatibility in various biological fields.
研究领域:
生物材料
·
膜科学
·
生物医学工程
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DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 51
·31950-31958
·
IF 3.361
Fengxia Chang,Hongyue Wang,Shuai He,Yu Gu,Wenjie Zhu,Tanwei Li,Runhui Ma
A reduced graphene oxide–polydopamine–carboxylated multi-walled carbon nanotube (RGO–PDA–cMWCNT) nanocomposite was fabricated via a facile, one-pot procedure and was characterized by a variety of techniques. A novel electrochemical sensor based on RGO–PDA–cMWCNT was constructed to determine hydroquinone (HQ) and catechol (CT) simultaneously. This newly prepared nanocomposite shows excellent electrocatalytic efficacy in the electrode reaction of the two isomers. Specifically, the peak-to-peak potential difference between the two dihydroxybenzenes is 115 mV for oxidation, which is obviously larger than similar electrochemical sensors. The established method displays a wide linear range from 0.5 to 5000 μM with a detection limit (S/N = 3) of 0.066 μM for HQ and 0.073 μM for CT. In addition, this electrochemical approach has been tested to measure the two dihydroxybenzenes in real samples and satisfactory results were recorded.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Xinyu Zheng,Rongrong Fan,Yingcai Hu,Huining Zhong,Xingyue Yang,Rixin Lv,Xuan Yang,Biao Huang
A glassy carbon electrode (GCE) modified with a nitrogen-doped activated carbon derived from sugarcane bagasse (NDSBAC) was prepared for the selective and simultaneous determination of hydroquinone (HQ) and catechol (CC). The NDSBAC was obtained via KOH-urea activated method. Scanning electron microscopy (SEM), Brunauer–Emmet–Teller (BET) and X-ray photoelectron spectroscopy (XPS) were employed to survey the surface morphology , adsorption properties and chemical compositions of NDSBAC, respectively. The anodic peak potential between HQ and CC is 112 ± 3 mV ( vs . Ag/AgCl) at NDSBAC/GCE. The anode peak currents of HQ and CC depend linearly on their respective concentrations. NDSBAC/GCE shows wide linear ranges of 0.5–300.0 μM for both HQ and CC. The detection limits are 0.11 μM for HQ and 0.09 μM for CC. The recoveries of HQ and CC are 92.1%–109.5% and 98.0%–104.3%, respectively, in the testing of the spiked lake water.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 6
·067504
·
IF 3.721
Jing Tang,Renhao Liu,Jie Li,Zhenzhen Hui,Shengbiao Zheng,Jiwei Wu,Jiahao Guo,Xuchun Wang,Jianfei Wang
A Co-containing zeolitic imidazolate framework (ZIF-67) and ordered macroporous carbon (OMC) composite has been made via in situ growing ZIF-67 in the suspension of OMC. Different sizes of ZIF67-OMC-x (400, 700, 1000 nm) hybrid composites were synthesis by adding different amount of polyvinyl pyrrolidone (PVP). The SEM and TEM images demonstrated that the sizes of ZIF-67 matched well with the macropores of the OMC matrix in as-prepared ZIF67-OMC-400 nm composites. The intriguing structure of ZIF67-OMC-400 hybrid composites utilized synergistic interactions between the large surface area and ordered porosity structure of ZIF-67 and the high conductivity of OMC. More importantly, ZIF67-OMC-400 was explored as a novel modifying material for fabricating electrochemical sensor and then was utilized successfully for catechol (CC) and hydroquinone (HQ) simultaneous detection. Under the optimized condition, wide linear responses of this sensor were obtained for HQ and CC detection in the range of 0.1 μM to 100 μM. The modified electrode was successfully demonstrated for real samples such as river water with satisfactory results.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Xiong Jia,Yujie He,Philippe F.-X. Corvini,Rong Ji
Humic substances are reactive during redox alteration. However, the role of this reactivity in the transformation of organic compounds and in carbon cycling in the environment is still unclear. Here, we used 14 C-radioactive tracer to study abiotic transformation and humification of catechol, a representative of naturally occurring monomeric phenols and phenolic pollutants, in suspensions of humic acids (HAs) at original and H 2 /Pd-reduced redox states with flux of air (HA org -Air and HA red -Air, respectively) or N 2 (HA org -N 2 and HA red -N 2 , respectively) for 20 min in absence and presence of Cu(II) and Fe(II). Both HA org and HA red can transform catechol in the absence of O 2 to 19% and 25% of the initially applied amount, respectively. The transformation of catechol strongly increased when air was introduced, amounting to 75% in HA red -Air treatment and 43% in HA org -Air treatment, owing to the generation of reactive oxygen species . Considerable amounts of catecholic carbons were incorporated into HAs (26% for HA red -Air and 19% for HA org -Air), constituting humification of catechol. The presence of Cu(II) strongly inhibited the overall transformation and humification of catechol, although it significantly increased humification at the start of incubation. The presence of Fe(II) overall enhanced both the transformation and humification. The results provide first insights into the impacts of redox alteration of humic substances together with the presence of metal ions with variable valences on the fate of phenolic compounds in the environment. This study points out that redox alteration-induced abiotic transformation may be one important process for dissipation of phenolic pollutants and humification of phenolic carbons in environments rich in HAs and subject to redox fluctuation.
研究领域:
环境科学
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有机化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Qi Wang,Jinjin Zhang,Nannan Dou,Jianying Qu
In this work, a leaf-shaped iron-doped metal–organic framework (MOF) was synthesized in the aqueous phase and marked as Fe-L-ZIF-8. Fe-L-ZIF-8 was carbonized at high temperature under nitrogen atmosphere to obtain an iron and nitrogen doped carbon nanonets with unique three-dimensional network structure (Fe, N -CNs), which was characterized with XRD, SEM, EDS, FTIR and electrochemical impedance spectra. And a highly sensitive electrochemical sensor was constructed through modifying Fe, N -CNs on the surface of a glassy carbon substrate for simultaneous detection of catechol and hydroquinone. Under optimal conditions, both the linear ranges for detecting CC and HQ are 0.50–80.00 μM and the limits of detection are both 0.17 μM. In addition, the proposed sensor exhibited a wider linear range with good stability, reproducibility and selectivity, which has potential applications.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 4
·e54859
·
IF 3
Hairuo Zhou,Xiao Niu,Xuanxuan Ding,Fei Yu,Hua Yang
The purpose of this study is to explore how to control the conductivity of gel conveniently and effectively through experiments. First, a kind of acrylamide-based composite with adhesion and conductivity adjustment was prepared by adding silver ions and silver monomers to the gel in one step. The semi interpenetrating network structure formed by the molecular chain of polyacrylamide and catechol modified sodium alginate in the composite is cross-connected with silver ions to form a double network structure. This change of network structure not only makes the structure of gel more stable, but also brings extraordinary conductivity. Secondly, different types of conductive ions and organic solutions were added to the gel system. Electrochemical impedance spectroscopy showed that the addition of silver enhanced the conductivity of the material; When NaNO 3 is used to replace water molecules in PAM, the ionic conductivity can be increased by 75.3% (from 2.44 × 10 −5 to 20.8 × 10 −5 mscm −1 ). When PDA/PAM was soaked in AgNO 3 , the ionic conductivity increased in the range of 10.4% ~ 674%. It provides a novel strategy for controlling the conductivity of composite materials.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haiyan Zhang,Yitong Chen,Yanhui Wei,Xiaokang Zhang,Hongchao Ma
The development of metal-based redox nanozymes represents a new frontier in pollutant sensing. In this field, designing highly active nanozymes and precisely regulating their enzymatic activity are key challenges. In this work, we report the construction of a copper peroxide@polydopamine (CuO2@PDA) nanozyme with dual enzyme-like activity, mimicking the active centers of laccase and peroxidase. Here, CuO2 acts as the catalytic center, while PDA serves as a carrier to prevent CuO2 aggregation and promotes conversion of CuII/CuI active sites via the reduction effect of its surface catechol groups to complete the catalytic cycle. As expected, the obtained CuO2@PDA nanozyme exhibits significant laccase- and peroxidase-mimetic activities. Moreover, its dual enzymatic activity can be systematically switched by adjusting pH and temperature. Specifically, laccase activity dominates near neutral pH, while CuO2 decomposition into Cu ions and H2O2 at acidic pH triggers peroxidase activity. Similarly, CuO2@PDA exhibits temperature-dependent dual enzymatic activity with peroxidase activity prevailing at low temperatures and laccase activity at high temperatures. According to enzymatic performance and XPS results, a possible catalytic mechanism of the dual enzymatic activity of CuO2@PDA has been proposed. Then, based on the pH-dependent dual enzymatic activity of CuO2@PDA, we constructed a detection system for the isomers of organic pollutants, catechol (CC) and hydroquinone (HQ). The laccase-like activity of CuO2@PDA enables direct oxidation of CC into yellow o-benzoquinone, while HQ discolors the preoxidized substrate generated via the peroxidase-like activity of CuO2@PDA. Moreover, selective sensing for CC and HQ with high sensitivity was achieved in real water samples. This approach can guide the design of nanozymes with multienzymatic activity and unveil their potential uses in environmental pollutant discrimination.
研究领域:
环境科学
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生物化学
·
纳米材料
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DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2020
·Vol. 32
·期 7
·1449-1458
·
IF 2.544
Huan Luo,Yong-Yi Zhao,Xian-Yi Jin,Jian-Mei Yang,Hang Cong,Qing-Mei Ge,Lin Sun,Mao Liu,Zhu Tao
A selective and sensitive modified-electrode for catechol and dopamine was presented with supramolecular recognition accomplished by making use of the macrocyclic host multifarene[3,3] that was used as a composite with reduced graphene oxide. The morphologies and electrochemical nature of the composite were characterized by atomic force microscopy, transmission electron microscopy, cyclic voltammetry and differential pulse anodic voltammetry. The modified electrode, best operated at a potential around 0.16 V vs. Ag/AgCl, displayed a differential pulse voltammetric response in the linear concentration range of 10–100 nM within a detection limit of 0.51 nM (at S/N=3). It was further applied to detect dopamine (at a working potential of 0.18 V vs. Ag/AgCl) in the linear concentration range of 10–100 nM with a detection limit of 0.62 nM. The modified electrode also exhibited satisfactory results to the determination of dopamine injections. The constructed modified electrode for dopamine detection was investigated in the presence of the interfering substances including glucose, urea and ascorbic acid, indicating a good selectivity.
研究领域:
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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DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 20
·6710-6719
·
IF 3.842
Youcheng Zhao,Xinyu Song,Qisheng Song,Zhilei Yin
A simple and efficient approach of preparing copper oxide/reduced graphene oxide (CuO/rGO) nanocomposite has been demonstrated. CuO/rGO nanocomposites were successfully synthesized through a one-step redox reaction between graphene oxide (GO) sheets and cuprous ions in CuCl without extra reducing agent. Notably, the reduction of GO and the deposition of CuO on the rGO sheets occurred simultaneously during the reaction process, resulting in a uniform and tight distribution of CuO nanoparticles on the reduced GO sheets. Furthermore, the as-prepared CuO/rGO composite (CuCl = 0.02 g) had a large BET surface area (235 m2 g−1) and a porous structure with macropores and mesopores. The as-prepared nanocomposite was exploited in the catalytic oxidation of catechol in aqueous media. The results indicated that the as-prepared copper oxide/rGO nanocomposite exhibited a higher electrocatalytic activity towards catechol oxidation than original CuO nanoparticles or reduced graphene oxide samples. This strategy opens a new facile and simple chemical route to synthesize copper oxide/rGO nanocomposites with excellent properties.
研究领域:
材料科学
·
环境科学
·
电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2025
·
IF 2.5
Yuge Liu,Zhiguo Li,Yongmei Jia
The fast detection of environmental contaminants catechol (CC) and hydroquinone (HQ) is of great importance to public health. In this research, a composite was firstly synthesised by a pre-exfoliation method, the components of which were Ni-Al-LDH and reduced graphene (rGO). This material was then utilised in the development of a highly sensitive biosensor for determining CC and HQ. The construction procedure involved modification of glassy carbon electrode (GCE) by the composite and laccase (LAC). Tests conducted by electrochemical methods showed the addition of laccase can greatly improve the response signal of electrochemical measurements on the composite modified GCE to CC and HQ. The electrochemical tests were performed by utilising 0.1 mol/L phosphate-buffer. When separately detected, the detecting linear range for CC by the biosensor was 0.009–0.58 and 0.95–4.4 mmol/L. When it comes to HQ, the range was 0.009–0.57 and 0.95–4.4 mmol/L on the composite/enzyme modified electrode. When the biosensor was used for detecting CC and HQ together, the linear ranges were both 0.019–0.56 and 1.0–4.4 mmol/L. The detection limits calculated for simultaneous detection were 0.75 and 0.47 μmol/L, respectively. The sensor also possessed excellent sensitivity, selectivity and long stability. For applicability of the biosensor, it was used in analysing the two substrates in real water samples, and the recoveries were acceptable.
研究领域:
环境科学
·
生物化学
·
材料科学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 8
·1-12
·
IF 5.3
Ruan Ya,Li Qiulan,Yang Dezhi,Yang Yaling
Copper selenide nanoparticles (CuSeNP) were synthesized using histidine, ethylenediamine, and sodium selenate as precursors by one-step microwave digestion methods. The as-prepared CuSeNPs exhibit excellent catechol oxidase mimic enzyme and catalase (CAT)-like activities. Dopamine (DA) can be oxidized to aminochrome with H 2 O 2 by CuSeNPs, and the intermediate product aminochrome can further react with α -naphthol to yield a highly fluorescent derivative. It was confirmed that Cr(III) could adsorb on the surface of CuSeNPs and inhibit the production of semiquinone radicals in the reaction system, and the catalytic activity of CuSeNPs was inhibited. The detection mechanisms, kinetics, and catalytic properties of CuSeNPs were systematically investigated. As a result, a novel fluorescence method for the assay of Cr(III) was established. The feasibility of CuSeNP nanozyme in detecting speciation Cr(III) in food samples was explored with satisfactory results. It showed the obvious potential for developing effective and dependable fluorescent detection method for protecting food safety. Graphical Abstract
研究领域:
分析化学
·
食品安全
·
纳米生物学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）