JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2018
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IF 3.235
Xiaofang Ma,Jing Chen,Yali Wu,Samrat Devaramani,Xiaoyan Hu,Qixia Niu,Caizhong Zhang,Duoliang Shan,Huan Wang,Xiaoquan Lu
The RGO/AuNPs/CS/ZnTCPP nanocomposites were successfully prepared with reduced graphene oxide (RGO) loaded with Au nanoparticles (AuNPs) existed in chitosan (CS) and water-soluble zinc meso-tetra (4-carboxylphenyl) porphyrin (ZnTCPP) by π-π nanoassembly method and were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), 1 H NMR spectra and UV–vis absorption spectroscopy. The most important advantage of the RGO/AuNPs/CS/ZnTCPP nanocomposites was environmentally friendly. Indium tin oxide (ITO) electrode surface was modified with the RGO/AuNPs/CS/ZnTCPP nanocomposites exhibited a good photocurrent response at −0.2 V under whitelight of Xenon lamp illumination. The photocurrent response could be greatly increased by adding hydroquinone (HQ) to the solution. Electrons of ZnTCPP were excited from HOMO to LUMO by irradiating light. The photoexcited electrons injected into the RGO , and then transferred to AuNPs further to the ITO. Addition of HQ resulted in the enhanced photocurrent signal by acting as a sacrificial electron donor ; Thereby scavenged the photogenerated holes of the excited ZnTCPP and oxidized to benzoquinone (BQ). Based on the above interaction, detection of HQ was developed by a novel photoelectrochemical (PEC) sensor (S/N = 3) with a linear range from 5 to 300 nmol/L (r = 0.997) and detection limit of 0.5 nmol/L. Proposed biosensor is simple, rapid and this was successfully applied for the quantification HQ in the real sample matrices.
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高影响因子
TALANTA
·
2024
·
IF 5.6
Jingwen Zhao,Zhuxuan Shi,Mixia Chen,Fengna Xi
Inspired by the iron porphyrin structure of natural horseradish peroxidase (HRP), an efficient carbon-based nanozyme was fabricated using nitrogen-doped graphene quantum dots (NGQDs) and iron ion (Fe 3+ ) nanocomposite, enabling selective distinguishment of hydroquinone (HQ) from its isomers. NGQDs with good dispersibility and uniform size were synthesized via a one-step hydrothermal process. NGQDs lacked peroxidase-like activity but the formed nanocomposite (Fe 3+ -NGQDs) upon Fe 3+ addition possessed high peroxidase-like activity. Fe 3+ -NGQDs nanocomposite exhibited shuttle-shaped structure (∼30 nm), the lattice structure of NGQDs and electron transfer between Fe 3+ and NGQDs. The Fe 3+ -NGQDs nanocomposite can catalyze the production of superoxide radicals (•O 2 − ) from H 2 O 2 . The Michaelis constant ( K m ) of Fe 3+ -NGQDs (0.115 mM) was lower than that of natural HRP (0.434 mM) with 3,3′,5,5′-tetramethylbenzidine (TMB) as the substrate and the maximum initial reaction rate ( V max , 16.47 × 10 −8 M/s) was nearly 4 times higher than that of HRP using H 2 O 2 substrate. HQ, unlike its isomers catechol (CC) and resorcinol (RE), could consume •O 2 − generated from the decomposition of H 2 O 2 catalyzed by Fe 3+ -NGQDs nanocomposite, reducing the oxidation of TMB. This principle enabled selective colorimetric determination of HQ ranged from 1 μM to 70 μM and a limit of detection (LOD) of 0.2 μM. Successful determination of HQ in pond water was also realized.
研究领域:
生物化学
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环境科学
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材料科学
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PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 14
·B1293
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IF 3.12
Yu Zhang,Qiang Xie,Zhi Xia,Guofeng Gui,Feng Deng
In this paper, a novel nanocomposite fulvic acid reduced graphene oxide (FA-rGO) and Co-phthalocyanine nanorods (CoPcNRs) was prepared and used to construct an electrochemical sensor for simultaneous detection of catechol (CC), hydroquinone (HQ), phenol (PN) and p-nitrophenol (p-NP). FA as reductant used to prepare FA-rGO nanocomposite, which fabricated by hydrothermal method and freeze-drying process. The method is environmentally friendly and realizes the gentle reduction of GO. CoPcNRs were synthesized by surfactant-assisted ultrasonic method. The microstructure and morphologies of the as-prepared materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-Vis spectrophotometer. The electrochemical oxidation of CC, HQ, PN and p-NP was investigated using differential pulse voltammetry (DPV). The results show that the FA-rGO/CoPcNRs modified electrode exhibits excellent electrochemical activity toward the simultaneous redox of CC, HQ, PN and p-NP. Under optimal conditions, the linear ranges of CC, HQ, PN and p-NP were 1 μM–650 μM, 2 μM–450 μM, 2 μM–160 μM, 2 μM–140 μM, with 0.3 μM, 0.65 μM, 0.65 μM and 0.65 μM, respectively. In addition, the modified electrode showed good selectivity, sensitivity and stability. The application in real samples was also evaluated, and the recoveries suggesting that FA-rGO/CoPcNRs nanocomposites could be used as an excellent potential reaction platform for the simultaneous determination of CC, HQ, PN and p-NP in environmental samples.
研究领域:
环境科学
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材料科学
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分析化学
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2024
·Vol. 25
·期 18
·9829
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IF 4.9
Tingfei Chen,Chao Liu,Xiaojun Liu,Chunnan Zhu,Dongyun Zheng
Effectively detecting catechol (CC) and hydroquinone (HQ) simultaneously is crucial for environmental protection and human health monitoring. In the study presented herein, a novel electrochemical sensor for the sensitive simultaneous detection of CC and HQ was constructed based on an electrochemically reduced graphene oxide (ERGO)-modified multi-walled carbon nanotube paste electrode (MWCNTPE). Scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and electrochemical techniques were utilized to characterize the sensing interface and investigate the sensing mechanism. Under the optimal detection conditions, the oxidation peak currents of CC and HQ show a good linear relationship with their concentrations in the range of 0.4–400 μM with a detection limit of 0.083 μM for CC and 0.028 μM for HQ (S/N = 3). Moreover, the sensor exhibits good performance and can be applied successfully in the simultaneous detection of CC and HQ in tap water samples and urine samples with satisfactory results, indicating its promising application prospects.
研究领域:
环境科学
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分析化学
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材料科学
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电化学
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高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Xiangwei Yuan,Yao Jin,Li Xu,Lian Ou,Junchun Guo,Qian Wang,Xiaoli Xiong
Efficient and sensitive detection of hydroquinone (HQ) in aquatic environments is paramount for environmental and human health protection. In this study, the CuS nanoparticles are successfully anchored on N-doped carbon nanofibers (CuS/N-CNFs) by electrospinning and sulfuration strategies. The resultant CuS/N-CNFs nanozyme catalyst exhibits abundant sulfur vacancies and mesoporous carbon structures, resulting in excellent electrocatalytic activity for the oxidation of HQ. Furthermore, the catalyst demonstrates significant peroxisase-like activity, which can catalyze colorless 3,3′, 5,5′ −tetramethylbenzidine (TMB) to blue oxTMB in the presence of H 2 O 2 . The mechanism investigations reveal that •OH radical serves as the main active species in this process. Based on these unique properties, a novel electrochemical and colorimetric dual-mode sensor is constructed for HQ detection with linear ranges of 1–614 μM and 1–57 μM, respectively, and the limit of detections (LODs) of 0.293 and 0.621 μM (S/N = 3). Moreover, the established HQ sensor platform is expected to be potential candidate for practical applications due to its satisfactory sensitivity and selectivity in real water samples.
研究领域:
环境科学
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电化学传感
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纳米材料
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分析化学
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高影响因子
Frontiers in Nutrition
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2026
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IF 5.5
Yang Chong,Fengsong Nie,Xiang Huang,Lingli Wang,Lingling Zhu,Shu Zhang,Junjun Yu,Yang Wang
IntroductionThe development of sensing interfaces that can simultaneously achieve efficient enrichment of targets and enhanced electron conduction is the key to improving the performance of phenolics detection in foodMethodsIn this paper, a novel electrochemical sensing platform consisting of an aminated zeolite imidazolium ester backbone material (ZIF-8-NH2) composited with sodium oxidized alginate (OSA)/carboxymethyl chitosan (CMCS) dynamic hydrogel (denoted as OC hydrogel) was successfully constructed. The platform exploits the mild Schiff base reaction between OSA and CMCS to construct a three-dimensional dynamic hydrogel substrate without an external cross-linking agent. On this basis, the combination of ZIF-8-NH2 and OC hydrogel was introduced. The amino groups on the surface of ZF-8-NH2 and the aldehyde groups of OSA are utilized to form covalent nano-crosslinking points, simultaneously exerting their electrocatalytic activity and pre-enrichment effect.ResultsElectrochemical studies demonstrated that the composite interface significantly accelerated electron transfer kinetics. The constructed sensor demonstrates exceptional analytical performance for hydroquinone. The detection limit is as low as the nanomolar level (16.7 nM), and the linear range extends up to four orders of magnitude (0.05 to 1800 μM). Furthermore, the sensor demonstrated its efficacy in the rapid analysis of a wide range of real samples (tap water, drinking water, beverages, and vegetable juices), with recoveries ranging from 97.4 to 103.6%.DiscussionThe observed performance is attributed to the multiple synergistic effects of the ZIF-8-NH2/OC hydrogel interface. The covalent connection between ZIF-8-NH2 and the OSA/CMCS hydrogel prevents nanomaterial detachment, ensuring interface stability. Meanwhile, ZIF-8-NH₂ reduces the overpotential for hydroquinone electrochemical oxidation and achieves significant signal amplification through pre-enrichment of target molecules. These features substantiate the reliability of the sensor in practical applications, offering an innovative solution for the detection of harmful substances in food.
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高影响因子
FOOD CHEMISTRY
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2026
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IF 10.4
Huihui Yang,Qinghua Liu,Yuanyuan Liu,Qian Su,Yiwei Dong,Minmin Li,Bei Fan,Fengzhong Wang,Long Li
Fe 3+ -regulated on-off-on probe was constructed for TBHQ detection in edible oils. • The probe shows low LOD (0.0067 μM) with good stability (−40 to 100 °C, pH 1–11). • Recovery rates in soybean oil range 98.60%–100.40% (RSD <2.1%). • Smartphone-assisted RGB analysis enables on-site TBHQ quantification via G/R ratio. Given the health risks of tert-butylhydroquinone (TBHQ), rapid, portable, selective, and sensitive quantification in edible oils is critical. With this in mind, a fluorescent “on–off–on” probe was developed based on rationally designed iron-doped carbon dots (CDs). The blue fluorescence of the CDs is quenched by Fe 3+ ions and recovered by TBHQ, enabling Fe 3+ detection in an “on–off” mode and TBHQ detection in an “off–on” mode. The probe exhibited excellent linearity for TBHQ over the range of 0.2–1.8 μM, with a low detection limit of 0.067 μM. Moreover, a smartphone-assisted sensor was constructed to enable portable TBHQ quantification in edible oils samples. This CD-based probe shows strong promise for the rapid, sensitive, and cost-effective monitoring of hazardous substances. Download: Download high-res image (93KB) Download: Download full-size image
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 13
·2725
·
IF 4.6
Yan Xiao,Yi Zhang,Zhigui He,Liwen Zhang,Tongfei Wang,Tingfan Tang,Jiaxing Chen,Hao Cheng
Overuse of tert-butylhydroquinone (TBHQ) as a food antioxidant has the potential to pollute the environment and threaten human health. Therefore, it is imperative to develop precise and rapid methods to detect TBHQ in food products. In this study, Fe- and Mn-doped Prussian blue analogs (FeMn-PBAs) were prepared by co-precipitation, FeMn-PBAs/PAN was prepared by electrostatic spinning, and a novel FeMn@C/CNFs composite was prepared by carbonization in nitrogen. Bimetallic FeMn doping has been shown to reduce vacancy defects and enhance the structural stability of PBA. Furthermore, electrostatic spinning has been demonstrated to reduce the agglomeration of PBA nanoparticles, which are electrode-modifying materials with high stability and good electrical conductivity. The morphological and structural characteristics of the FeMn@C/CNF composites were examined using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The electrochemical behavior of tert-butyl hydroquinone in FeMn@C/CNFs was studied by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and chronocoulometry (CC). The results demonstrate that the sensor exhibits excellent repeatability, reproducibility, and anti-interference capabilities. The prepared electrochemical sensor can be effectively utilized for the detection of TBHQ in food samples such as soybean and peanut oil samples, proving its strong potential for practical applications.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
·
IF 4.6
Yue Huang,Feifan Cheng,Danling Mei,Meichun Chen,Xueqin Zhao,Biao Huang
Tert-butyl hydroquinone (TBHQ) is a synthetic phenolic antioxidant commonly found in food. The overuse of TBHQ poses a potential toxicity to human health, which has attracted significant attention in food safety. In this study, we developed a dual-mode test platform strategy centered on silicon quantum dots (SiQDs) for fluorometric/colorimetric TBHQ detection. The SiQDs with Fe (III) as the fluorescence switch and co-enzyme, were synthesized and characterized, facilitating the catalysis of TBHQ to 2- tert -butyl-1,4-benzoquinone (TBBQ). There was a linear correlation with TBHQ concentration in the range of 5–200 μM, with a limit of detection (LOD) of 0.12 μM. Furthermore, with the assistance of 3,3′,5,5′-tetramethylbenzidine (TMB) as a chromogenic substrate, the nanoprobes exhibited good colorimetric detection performance for TBHQ, with an LOD of 7 μM in the 15–500 μM range. Moreover, smartphone-integrated agarose gel strips were successfully developed for simple TBHQ detection with naked-eyes and the quantitative analysis with a LOD of 15 μM. The fabricated sensors successfully monitored TBHQ levels in spiked edible oil samples with recoveries in the range of 89.05–109.61 % and relative standard deviations (RSDs, %) less than 1.75 %, suggesting applicability for the detection of TBHQ in a complex food matrix.
研究领域:
分析化学
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食品科学
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xiangrong Zeng,Hongyu Xiao,Yaxuan Lei,Sifei Ye,Peng Liu,Zhuohua Kong,Yangping Wen,Guixia Tan,Xia Gong,Mingfang Li
The simultaneous electrochemical detection of catechol (CC) and hydroquinone (HQ) isomers is hindered by overlapping voltammetric signals, creating a persistent sensitivity-selectivity-accuracy paradox. Herein, we present a synergistic sensing platform integrating BC-Co@NC nanoarchitectures (engineered via topotactic carbonization to form 3D hierarchical pores with atomically dispersed Co-N 4 sites) and a first- and second-derivative voltammetry cascade (FS-DVC) optimized by Savitzky-Golay algorithm. This dual-engine strategy achieves 152 mV interpeak separation, ultra-low limits of detection (0.09 nM for CC, 0.12 nM for HQ), a linear range spanning four orders of magnitude (0.3-500 μM), and robust performance in environmental matrices (95.2-99.1% recoveries in agricultural water/soil). This work establishes a new paradigm for electrochemical isomer discrimination through the synergistic fusion of tailored material design and advanced signal mathematics.
研究领域:
电化学
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纳米材料
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分析化学
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信号处理
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环境监测
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuan Yang,Xueqin Wang,Shenghao Xu,Beili Lu,Biao Huang,Xinyu Zheng,Guanfeng Lin
Hydroquinone (HQ) in wastewater is of great concern, as it is harmful to human health and threatens the ecological environment. However, the existing adsorbents have low adsorption capacity for HQ. To improve the removal of HQ, N,S-codoped activated carbon-ZIF-67 (NSAC-ZIF-67@C) was synthesized in this study by in situ growth of ZIF-67 on N,S-codoped activated carbon (NSAC) and carbonization. The influence of pH, contact time, and initial concentration on the adsorption behaviors of NSAC-ZIF-67@C on HQ were investigated. Owing to the synergistic effect of abundant active sites and well-developed pore structure, the NSAC-ZIF-67@C achieved a prominent adsorption capacity of 962 mg·g–1 and can still retain high adsorption performance after 5 cycles for HQ, which is superior to that of reported other adsorbents. HQ adsorption follows the pseudo-second-order kinetics model (R2 = 0.99999) and the Freundlich isotherm model. X-ray photoelectron spectroscopy (XPS) analysis before and after adsorption as well as density functional theory (DFT) calculation results showed that pyridinic-N-termini were conducive to the π–π interactions and hydrogen-bonding interactions. Therefore, the adsorption mechanisms of NSAC-ZIF-67@C on HQ involve pore filling, electrostatic attraction, π–π interaction, and hydrogen bonding. This study is expected to provide a reference for designing highly effective adsorbents for wastewater treatment.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2013
·
IF 5.695
He-Fang Wang,Ye-Yu Wu,Xiu-Ping Yan
A room-temperature phosphorescence (RTP) strategy was developed for direct, additive-free discrimination of catechol from resorcinol and hydroquinone based on sodium tripolyphosphate capped Mn-doped ZnS quantum dots (STPP-Mn-ZnS QDs). The RTP response of STPP-Mn-ZnS QDs to the three isomers was pH-dependent, and the greatest difference in the RTP response to the isomers was observed at pH 8.0: catechol enhanced the RTP intensity of the QDs, while resorcinol and hydroquinone had little effect on the RTP intensity of the QDs. The enhanced RTP intensity of 1 μM catechol was not affected by the coexistence of 30 μM resorcinol and 50 μM hydroquinone at pH 8.0. The detection limit of this RTP method was 53 nM catechol, and the precision was 3.2% (relative standard deviation) for five replicate detections of 1 μM catechol. The discrimination mechanism was ascribed to the weak bonded ligand of STPP-Mn-ZnS QDs and the different interaction between the three isomers and STPP-Mn-ZnS QDs. The strong binding of catechol to Zn resulted in the extraction of Zn from the surface of STPP-Mn-ZnS QDs and the generation of holes that were trapped by Mn2+ to form Mn3+. Catechol also promoted the reduction of Mn3+ into Mn2+ excited state, thus ultimately inducing the enhanced RTP response of STPP-Mn-ZnS QDs.
研究领域:
分析化学
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纳米材料
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发光传感器
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环境监测
·
化学传感
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高影响因子
危险品化学品经营许可证（带存储）