MICROCHIMICA ACTA
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2026
·Vol. 193
·期 6
·413
·
IF 5.4
Hu Xiaoping,You Nana,Xu Fuli,Liu Gen,Du Fangxin
A portable, high-throughput visual sensing platform was constructed for the effective detection of catechol (CA), on the basis of the single-electrode electrochemistry system (SEES) and a self-enhanced electrochemiluminescence (SEECL) material, namely Au-Ru@Zn metal-organic framework (MOF). It was found that Ru(bpy) 3 2+ and oxalate co‑encapsulated within the Ru@Zn MOF generated a SEECL signal. To further amplify the SEECL response, tripropylamine (TPA) was introduced as an exogenous co-reactant, synergizing with endogenous oxalate to establish dual ECL pathways. The oxidation product of CA, semiquinone radicals, is proposed to effectively quenched photoexcited Ru(bpy) 3 2+ * species and competitively consume the precursor Ru(bpy) 3 3+ by reducing it to Ru(bpy) 3 2+ , thereby causing the ECL signals of Au-Ru@Zn MOF to be significantly quenched. Under optimal experimental conditions, the Au-Ru@Zn MOF-modified SEES exhibited excellent ECL response performance toward CA, with a linear detection range from 1.0 × 10⁻ 9 to 5.0 × 10⁻ 4 mol·L⁻ 1 and a detection limit as low as 7.94 × 10⁻ 10 mol·L⁻ 1 (S/ N = 3). Additionally, the proposed SEES successfully detected CA in tea with the recoveries ranging from 98.8% to 101.0%. This work offers a novel approach for the sensitive detection of CA and has significant application possibilities in the realm of food safety monitoring with the benefits of high throughput, portability, and low cost. Graphical abstract The alternative text for this image may have been generated using AI.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Zengfeng Wei,Yumeng Zhang,Hu Xia,Lijie Ni,Wenhai Wu,Xiaoning Wang,Heng Quan
A novel bio-based corrosion inhibitor, hexadecyl amine-modified catechol (CA16), was synthesized, and its molecular structure was characterized. The ability of CA16 to inhibit the corrosion of carbon steel in 1 M HCl was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy and weight loss. The highest inhibition efficiency reached 96.87% at 10 −3 M. CA16 is a mixed-type corrosion inhibitor that can adsorb on the Fe surface spontaneously through chemical adsorption following the Langmuir adsorption model. The adsorption of CA16 and carbon steel occurred between catechol groups and the Fe surface, as confirmed by quantum chemical calculations and molecular dynamic simulations. This novel bio-derived high-performance inhibitor offers a sustainable alternative to conventional petrochemical-based counterparts, demonstrating significant potential for industrial-scale applications while aligning with green chemistry principles.
研究领域:
材料科学
·
绿色化学
·
电化学
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
·
IF 3.807
Zhimin Liu,Hao Wu,Xianguo Ge,Haijun Zhan,Leqian Hu
Graphitic carbon nitride quantum dots (g-CNQDs) with special structures have exhibited fascinating advantages over the common QDs. In this work, we report a novel Ru(bpy) 3 2+ /g-CNQDs electrochemiluminescence (ECL) system, and the effect of g-CNQDs on the ECL signal of Ru(bpy) 3 2+ was discussed. It was found that g-CNQDs containing in proposed ECL system played an important coreactant role in ECL signal enhancement of Ru(bpy) 3 2+ , which was proved by electrochemical, ultraviolet, and ECL experiments. Based on the quenching effect of catechol on the ECL signal of Ru(bpy) 3 2+ /g-CNQDs, a quenching-based ECL system was designed for catechol determination. The ECL sensing system demonstrated high sensitivity to catechol, with a linear range from 10 nM to 2 mM and a detection limit of 2.5 nM (S/N = 3). The sensor was adopted for catechol analysis in tea samples with satisfactory results.
研究领域:
分析化学
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材料科学
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Biomaterials Science
·
2022
·Vol. 10
·期 10
·2692-2705
·
IF 7.59
Haojie Lu,Jing Liu,Meizhe Yu,Peili Li,Ruobing Huang,Wenzhen Wu,Zunhan Hu,Yuhong Xiao,Feng Jiang,Xiaodong Xing
Bacterial infection and excessive reactive oxygen species (ROS) remain challenging factors contributing to the delayed healing of chronic wounds. Although various antibacterial and antioxidant hydrogel dressings have been developed to accelerate wound healing, multifunctional hydrogels fabricated by rationally designing and introducing carbonized polymer dots (CPDs) have rarely been reported. Herein, inspired by the mussel biomimetic approach, we synthesized 3,4-dihydroxybenzaldehyde functionalized chitosan (DFC), and then the polymeric precursor was pyrolyzed into CPDs with abundant amino and catechol groups on the surface, which endowed it with a highly positively charged surface that could activate the photothermal effect under near-infrared (NIR) light irradiation. Finally, the nanocomposite hydrogel (PVA@CPDs) was simply constructed by directly mixing polyvinyl alcohol (PVA) with CPDs, utilizing the freeze–thaw cycle method to form a gel, in which, CPDs as a center of polyfunctional nanoparticles drove the formation of PVA microcrystalline crosslinking and endowed the PVA substrate with versatile functionalities. Remarkable and comprehensive improvements in the swelling behavior, mechanical properties and adhesive strength of the hydrogel could be conveniently achieved with the suitable loading of CPDs. The in vitro experiments demonstrated that the PVA@CPDs hydrogel presented broad-spectrum and rapid bactericidal activity, concurrently acting as an effective antioxidant being able to scavenge free radicals. In addition, no obvious cytotoxicity was observed for the multifunctional hydrogel after incubation with L02 cells. In vivo evaluation in an infected full-thickness skin wound model demonstrated that the PVA@CPDs hydrogel promoted wound closure without any side effects. As a consequence, the current work manifests a facile yet versatile strategy to develop effective and biocompatible multifunctional hydrogel dressings for bacteria-infected wound healing.
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Acta Biomaterialia
·
2014
·
IF 5.684
Bin Yang,Yin Lv,Jing-yi Zhu,Yun-tao Han,Hui-zhen Jia,Wei-hai Chen,Jun Feng,Xian-zheng Zhang,Ren-xi Zhuo
The present work reports the construction of a drug delivery nanovehicle via a pH-sensitive assembly strategy for improved cellular internalization and intracellular drug liberation. Through spontaneous formation of boronate linkage in physiological conditions, phenylboronic acid-modified cholesterol was able to attach onto catechol-pending methoxypoly(ethylene glycol)- block -poly( l -lysine). This comb-type polymer can self-organize into a micellar nanoconstruction that is able to effectively encapsulate poorly water-soluble agents. The blank micelles exhibited negligible in vitro cytotoxicity, yet doxorubicin (DOX)-loaded micelles could effectively induce cell death at a level comparable to free DOX. Owing to the acid-labile feature of the boronate linkage, a reduction in environmental pH from pH 7.4 to 5.0 could trigger the dissociation of the nanoconstruction, which in turn could accelerate the liberation of entrapped drugs. Importantly, the blockage of endosomal acidification in HeLa cells by NH 4 Cl treatment significantly decreased the nuclear uptake efficiency and cell-killing effect mediated by the DOX-loaded nanoassembly, suggesting that acid-triggered destruction of the nanoconstruction is of significant importance in enhanced drug efficacy. Moreover, confocal fluorescence microscopy and flow cytometry assay revealed the effective internalization of the nanoassemblies, and their cellular uptake exhibited a cholesterol dose-dependent profile, indicating the contribution of introduced cholesterol functionality to the transmembrane process of the nanoassembly.
研究领域:
药剂学
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生物医学工程
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分子生物学
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Analytical Methods
·
2016
·Vol. 9
·期 2
·338-344
·
IF 1.915
Huijuan Wang,Jianhang Qu,Yong Wang,Shufang Li,Jianying Qu
Here, gold/Ni(OH)2 nanocomposites supported on reduced graphene oxide (Au/Ni(OH)2/rGO) were synthesized by a one-step wet-chemical method, which were characterized by TEM, IR, SEM, XPS and XRD techniques. The experiments demonstrated that the as-prepared nanocomposites showed a collection of unique characteristics, for example, high loading and homogeneous distribution. The nanocomposite modified electrode was prepared based on a glassy carbon substrate, which possessed excellent electrocatalytic activity to the redox reaction of catechol (CC). Under optimal conditions, the concentration of CC showed a linear relationship with its response current from 0.4 μM to 33.8 μM with a detection limit (S/N = 3) of 0.13 μM. The proposed sensor was successfully applied to detect CC in water with satisfactory results, which exhibited excellent selectivity and sensitivity, with potential applications.
研究领域:
纳米材料
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电化学
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分析化学
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环境科学
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JOURNAL OF MEMBRANE SCIENCE
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2023
·
IF 9.5
Runkai Su,Guoying Feng,Man Xu,Cunwen Wang,Yanbo Li
The present work provides an efficient strategy to prepare mussel-inspired nanofiltration membranes with lower MWCO, via combining the catechol-amine chemistry and the chemistry of amino-silane coupling agents. The membranes were synthesized by stepwise depositing tannic acid (TA) and pre-hydrolyzed 3-aminopropyltriethoxysilane (APTES) on the PSF support. TA adsorbed on the polysulfone (PSF) support via hydrogen bonding . The pre-hydrolyzed APTES self-polymerized and reacted with TA, forming a crosslinked network through the Michael addition/Schiff base reactions. The membrane performance was tailored by controlling the hydrolysis degree of APTES. At optimal conditions, the APTES-TA/PSF membrane with MWCO of 200 Da and water permeance of 11 Lm −2 h −1 bar −1 was fabricated. The salt rejections toward Na 2 SO 4 and NaCl were around 90% and 20% respectively. The continuous prolonged filtration showed the membrane had good filtration stability. Compared with previously reported mussel-inspired and polyphenol membranes, the present membrane had a much lower MWCO and higher permeance. The membrane can efficiently remove typical pharmaceuticals with molecular weight from 200 to 400 Da, indicating this type of membrane has promising prospects in trace-organic contaminated wastewater treatment .
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IRANIAN POLYMER JOURNAL
·
2023
·
IF 3.1
Zou Yilong
Heavy metal pollution is a global environmental threat that jeopardizes both human health and ecosystems. To combat this issue, the adsorption method has emerged as a cost-effective, efficient, and environmentally friendly solution. Hydrogels, three-dimensional hydrophilic polymer networks, display remarkable swelling and adsorption capabilities, making them superior to other adsorbents. They facilitate easier adsorbate transfer, resulting in enhanced adsorption efficiency. This study introduces a novel, energy-efficient approach for crafting metal-ion hydrogel adsorbents. The process involved grafting catechol groups onto chitosan (CS-CH) and then forming a hydrogel through a Schiff base reaction between CS-CH and oxidized carboxymethyl cellulose (OCMC). Successful hydrogel formation was confirmed using FTIR and UV–Vis spectroscopies. The hydrogel’s dual interaction mechanism, facilitated by catechol and amine groups, enhanced its pollutant-binding capacity. Under optimal conditions (pH = 7) and a 180-min adsorption period, the OCMC/CS-CH hydrogels exhibited significant practical adsorption efficiencies: 89.6% for Cu 2+ , 80.5% for Cd 2+ , and 91.8% for Pb 2+ ions. Subsequent experiments reaffirmed its exceptional adsorption performance for these ions. Notably, the hydrogel maintained its efficacy even after five cycles of adsorption and desorption in 0.1 mol/L HCl, showcasing its impressive regeneration potential. Collectively, the straightforward fabrication process, consistent performance, and negligible secondary pollution make this hydrogel a promising candidate for a wide array of applications in addressing heavy metal contamination. Graphical abstract
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Yingying Song,Yingzhen Zhang,Jie Li,Changhui Tan,Yancai Li
Highly ordered and uniformly sized mesoporous carbon nanospheres (MCNs) were synthesized by a low-concentration hydrothermal method . Then, a polymeric ionic liquid (PIL) was incorporated into the MCNs by a hydrothermal method to form (polymeric ionic liquid)/(mesoporous carbon nanospheres) (PIL-MCNs) nanocomposites . The MCNs and PIL-MCNs were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The characterization results demonstrate that the materials are highly ordered and possess uniform size. The PIL-MCNs modified glassy carbon electrode (GCE) exhibits good electrocatalytic properties to the redox of hydroquinone (HQ), catechol (CC), and paracetamol (PA), and typical oxidation peak potentials are of 0.214 V, 0.321 V and 0.509 V (vs. Ag/AgCl), respectively. The PIL-MCNs/CS/GCE was used to the simultaneous determination of HQ and CC, and also the detection of PA. Under optimal conditions, the responses to HQ, CC and PA are linear in 10–350 μM, 10–400 μM and 1–300 μM, and the detection limits are 1.39, 0.62, and 0.164 μM (S/N = 3). Satisfactory results were obtained in determination of HQ, CC simultaneously in spiked tap water samples, and in the detection of PA in paracetamol tablets. In addition, the sensor displays satisfied selectivity, good reproducibility and stability.
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ELECTROANALYSIS
·
2020
·Vol. 32
·期 9
·2010-2017
·
IF 2.544
Shengbiao Zheng,Jiaqi Hu,Xue Cui,Tao Hu,Yuyang Zhang,Jiahao Guo,Jing Tang,Xuchun Wang
In the present study, we report a facile method for preparing a porous MWCNTs/ZIF-67 nanocomposite with the help of a morphology-maintained ZIF-67 in situ growth on multi-walled carbon nanotubes. Interesting, the MWCNTs/ZIF-67 nanocomposite demonstrated excellent electrochemical activity for hydroquinone (HQ) and catechol (CC) attribute to the effective interconnections ZIF-67 crystals and MWCNTs. The analytical curves for HQ and CC obtained by differential pulse voltammetry (DPV) were linear in the range from 0.5 to 100 μM. Benefitting from the excellent conductivity of MWCNTs as well as the high surface area and porosity of ZIF-67, the advanced nanocomposite displayed good reproducibility, high selectivity and excellent stability, and was successfully employed to assay the content of dihydroxybenzene isomers in the lake water samples.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 6
·B547
·
IF 3.12
Siyi Yang,Mei Yang,Qingyan Liu,Xiaojing Wang,Huanbao Fa,Yongzhong Wang,Changjun Hou
Three dihydroxybenzene isomers, hydroquinone (HQ), catechol (CC) and resorcinol (RS), were determined simultaneously by an ultrasensitive electrochemical sensor based on a glassy carbon electrode modified by multiwalled carbon nanotube@reduced graphene oxide nanoribbon (MWCNT@rGONR) composite. The material was synthesized via hydrothermal method and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). We used cyclic voltammetry (CV) to study the electrochemical performance of the three isomers and differential pulse voltammetry (DPV) to optimize the experimental parameters. Based on the optimal experimental condition, our electrochemical sensor displayed a good linear relationship with the concentration range of 15 to 921 μM, 15 to 1101 μM, and 15 to 1301 μM and detection limit of 3.89 μM, 1.73 μM and 5.77 μM for HQ, CC and RS respectively. The electrochemical sensor based on MWCNT@GONR composite showed outstanding ability of reproducibility, stability and anti-interference. In addition, this sensor was also used successfully for simultaneous determination of HQ, CC and RS in real samples with satisfactory result.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
·
IF 7.149
Peng Yi,Quan Chen,Hao Li,Di Lang,Qing Zhao,Bo Pan,Baoshan Xing
The formation and occurrence of environmentally persistent free radicals (EPFRs) have recently attracted increasing research attention. The interactions between organics and transition metals and the crystalline forms of the transition metals are essential for EPFR formation. This study is thus designed to investigate catechol degradation and compare the characteristics of EPFRs on α-Fe2O3 (hematite, HM) and α-FeOOH (goethite, GT). Catechol degradation was inhibited in the dark in the presence of iron oxides. The inhibition was stronger on GT-silica, but the electron paramagnetic resonance (EPR) signals of the two systems were comparable. The enhanced degradation under UV light irradiation was comparable between HM-silica and GT-silica, but the EPR signals were stronger on GT-silica. Catechol was adsorbed on HM in a mononuclear bidentate (M-B) configuration, but it was adsorbed in both mononuclear monodentate (M-M) and binuclear bidentate (B-B) configurations on GT. After series analysis, we proposed that the dimer-type radical (2,2′,3,3′-tetrahydroxy-1,1′-biphenylene) was responsible for the more stable EPR signals for the HM system, while the M-M structure was more favorable for the catechol stabilization. Note that in the analysis of EPFR formation mechanisms, it is important to consider (1) different crystalline lattices and (2) the contribution of the degradation byproducts of the parent organics.
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