Polymers
·
2024
·Vol. 16
·期 17
·2483
·
IF 4.7
Lei Xu,Jiao Lv,Shengrui Yu
Conductive multi-walled carbon nanotubes (MWCNTs) as well as piezoelectric zinc oxide (ZnO) nanoparticles are frequently used as a single additive and dispersed in polyvinylidene fluoride (PVDF) solutions for the fabrication of piezoelectric composite films. In this study, MWCNT/ZnO binary dispersions are used as spinning liquids to fabricate composite nanofibrous films by electrospinning. Binary additives are conducive to increasing the crystallinity, piezoelectric voltage coefficient, and consequent piezoelectricity of as-spun films owing to the stretch-enhanced polarization of the electrospinning process under an applied electric field. PCZ–1.5 film (10 wt. % PVDF/0.1 wt. % MWCNTs/1.5 wt. % ZnO nanoparticles) contains the maximum β-phase content of 79.0% and the highest crystallinity of 87.9% in nanofibers. A sensor using a PCZ–1.5 film as a functional layer generates an open-circuit voltage of 10 V as it is subjected to impact loads with an amplitude of 6 mm at 10 Hz. The piezoelectric sensor reaches a power density of 0.33 μW/cm 2 and a force sensitivity of 582 mV/N. In addition, the sensor is successfully applied to test irregular motions of a bending finger and stepping foot. The result indicates that electrospun PVDF/MWCNT/ZnO nanofibrous films are suitable for wearable devices.
研究领域:
材料科学
·
纳米技术
·
传感器技术
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DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 2
·146
·
IF 4.3
Ying Liu,Zhipeng Zhang,Yuling Wu,Huan Yang,Jiao Qu,Xiaolin Zhu
The disinfection of drinking water is essential for eliminating pathogens and preventing waterborne diseases. However, this process generates various disinfection byproducts (DBPs), which toxicological research indicates can have detrimental effects on living organisms. Moreover, the safety of these DBPs has not been sufficiently assessed, underscoring the need for a comprehensive evaluation of their toxic effects and associated health risks. Compared to traditional methods for studying the toxicity of pollutants, emerging electrochemical sensing technologies offer advantages such as simplicity, speed, and sensitivity, presenting an effective means for toxicity research on pollutants. However, challenges remain in this field, including the need to improve electrode sensitivity and reduce electrode costs. In this study, a pencil graphite electrode (PGE) was modified with carboxylated multi-walled carbon nanotubes (MWCNT-COOH) and nano-iron (III) oxide (α-Fe2O3) to fabricate a low-cost electrode with excellent electrocatalytic performance for cell-active substances. Subsequently, a novel cellular electrochemical sensor was constructed for the sensitive detection of the toxicity of three drinking water DBPs. The half inhibitory concentration (IC50) values of 2-chlorophenylacetonitrile (2-CPAN), 3-chlorophenylacetonitrile (3-CPAN), and 4-chlorophenylacetonitrile (4-CPAN) for HepG2 cells were 660.69, 831.76, and 812.83 µM, respectively. This study provides technical support and scientific evidence for the toxicity detection and safety assessment of emerging contaminants.
研究领域:
环境科学
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分析化学
·
毒理学
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PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Vildan Sanko,Ahmet Şenocak,Süreyya Oğuz Tümay,Yasin Orooji,Erhan Demirbas,Alireza Khataee
Bisphenol A (BPA) is an industrially preferred material for the production of plastic and polycarbonate as well as a used material for the interior of food and beverage cans. In this study, synthesis and electrochemical sensor application of Mo 2 Ti 2 AlC 3 /MWCNT (multi-walled carbon nanotube) nanocomposite for BPA sensing was evaluated. Mo 2 Ti 2 AlC 3 was used as MAX phase material in the design of the sensor, and MWCNT was preferred to increase conductivity and sensitivity. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to determine Mo 2 Ti 2 AlC 3 /MWCNT nanocomposite's electrochemical sensor performances which had LOD of 2.7 nM and LOQ of 8.91 nM in the linear working range of 0.01–8.50 μM calculated from DPV. The composite showed a single oxidation step against BPA which is diffusion-controlled and irreversible. The sensor was successfully applied for the determination of BPA in milk pack, plastic bottle, and can with recoveries ranging from 95.67% to 100.60%. In addition, sensor performance was examined through selectivity , repeatability, and reusability studies. HPLC as a standard determination method was carried out for accuracy of the voltammetric determination method in the real samples. The developed sensor could be applied to different areas from industry quality control to clinical analysis for the detection of BPA.
研究领域:
环境科学
·
分析化学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Tingting Zhang,Hao Guo,Meng Yang,Lei Sun,Junye Zhang,Mingyue Wang,Fan Yang,Ning Wu,Wu Yang
In this study, metal–organic backbone (UiO-66-NH 2 ) and thionyl chloride functionalized carbon nanotubes (COCl-MWCNT) were successfully synthesized, and introduced into carbon black (CB) for fabricating novel electrochemical sensor UiO-66-NH 2 /COCl-MWCNT/CB/GCE towards simultaneous determination of dihydroxybenzene isomers hydroquinone (HQ), catechol (CC) and resorcinol (RC). Due to large surface area, excellent conductivity, good electrocatalytic activity and high stability the developed composite modified electrode delivered excellent analytical performance for these three analytes. Under optimal conditions, differential pulse voltammetric (DPV) currents showed good linear relationships with the concentrations of HQ, CC and RC with low detection limits (0.24 μM, 0.11 μM, 0.47 μM) and wide detection ranges (1–1000 μM and 5–1000 μM). In addition, this sensor demonstrated favorable reproducibility, stability and good selectivity for HQ, CC and RC and possessed a great potential for selective detection of dihydroxybenzene isomers in environmental water samples.
研究领域:
分析化学
·
环境科学
·
材料科学
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DOI
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 5
·562-571
·
IF 3.1
Xu Wang,Liang He,Lulu Xu,Zhongshou Liu,Yao Xiong,Weiqi Zhou,Hang Yao,Yangping Wen,Xiang Geng,Ruimei Wu
A nano-ZnS-decorated hierarchically porous carbon (ZSHPC) was mixed with MWCNTs to obtain ZSHPC/MWCNT nanocomposites. Then, ZSHPC/MWCNTs were used to modify a screen-printed electrode, and a portable electrochemical detection system combined with machine learning methods was used to investigate carbendazim (CBZ) residues in rice and tea. The electrochemical performance of the constructed electrode showed that the electrode had good electrocatalytic ability, large effective surface area, strong stability and anti-interference ability. Support Vector Machine (SVM), Least Square Support Vector Machine (LS-SVM) and Back Propagation-Artificial Neural Network (BP-ANN) were used to establish the prediction model for CBZ residues in rice and tea, and the traditional linear regression was developed. The investigated results showed that the LS-SVM model had the best prediction performance and the lowest prediction error compared with the traditional linear regression, BP-ANN and SVM models. The R2, RMSE, and MAE for the training set samples were 0.9969, 0.3605 and 0.2968, respectively. The R2, RMSE, MAE and RPD for the prediction set samples were 0.9924, 0.6190, 0.5360 and 10.3097, respectively. The average recovery range of CBZ in tea and rice was 98.77–109.32% and that of RSD was 0.47–2.58%, indicating that the rapid analysis of CBZ pesticide residues in agricultural products based on a portable electrochemical detection system combined with machine learning was feasible.
研究领域:
分析化学
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农业科学
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食品科学
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DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Lei Chen,Zekun Li,Yufeng Ma,Qianqian Shang,Yun Hu,Qin Huang,Meng Zhang,Puyou Jia,Yonghong Zhou
In order to reduce the overdependence on petroleum-based products, the preparation of functional polymers with renewable resources has become a research hotspot. In this study, tung oil, extracted from tung tree seeds, was introduced to the synthesis of tung maleic anhydride (TOMA) and epoxidized tung oil ethanolamides (ETOE) via a simple modification of the conjugated double bonds and ester bonds of tung oil, and then tung oil-based vitrimers (PETVs) based on a dynamic hydroxyl ester exchange reaction were prepared with different ratios of ETOE to TOMA. Due to the presence of abundant hydroxyl esters and flexible aliphatic long chains, PETVs showed a fast and excellent self-healing performance, and their repair efficiency reached 94.7% at 160 °C for 10 min without any catalyst. In addition, PETVs exhibited excellent mechanical properties, alkali degradability, shape memory properties, and recyclability. Degradation experiments indicated that PETVs could be completely hydrolyzed to small-molecule substances in alkaline solutions. PETV/MWCNT composites (PMs) with excellent electrical and thermal conductivity exhibited rapid self-healing ability under the conditions of electrical, infrared radiation, and heating. Compared to conventional petroleum-based thermoset polymers, PETVs with the advantages of environmental friendliness and sustainability could provide a practical strategy to prepare high-performance vitrimers from renewable materials.
研究领域:
材料科学
·
化学工程
·
环境科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wanxin Tang,Zhen Gu,Yao Chu,Jian Lv,Li Fan,Xinling liu,Feng Wang,Ye Ying,Jian Zhang,Yuning Jiang,Jiaying Cao,Anni Zhu,Haifeng Yang
Developing wearable sensors to determine chemical contamination in solidoid is currently a great challenge. Hydrogels with polymeric networks have been employed as electrochemical cells and media to realize wearable solidoid sensing. However, it is still a hard task to enable hydrogel to simultaneously possess effective mass transfer, mechanical robustness as well as easy and tight adhesion to sensing electrodes. Routinely, a hydrogel with improved adhesion to the electrode surface by introducing additives may deteriorate the mass transfer capability. Increasing the porosity of hydrogel could enhance mass diffusion but sacrifices mechanical robustness. Herein, a composite hydrogel is achieved by embedding magnetic oriented MWCNT-Fe 3 O 4 strips in porous agarose (MMFPA), which exhibits enhanced permeability and speeding diffusion of electrolyte ions. Moreover, the orientation in order and strip-like MWCNT-Fe 3 O 4 three-dimensional composites improve the compressive strength of hydrogel, which could recover back within 2 min in water after removal of pressure. Such magnetic hydrogel is beneficial to be assembled to the wearable glove sensor by using magnets to achieve a stable and compact sensing platform. As the application example, the resultant wearable sensing protocol is successfully utilized to monitor Cd 2+ trace residues in rice, tea, and soil with an affordable response as low as 0.112 mg/kg and rapid signal acquisition (<5 min). It paves an attractive, accessible, and effective way to on-site evaluate solidoid Cd 2+ level for forewarning food safety and environmental risk.
研究领域:
材料科学
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环境科学
·
分析化学
·
可穿戴技术
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Mingming Dong,Shuyong Yang,Peng Zhou,Yue Gao,Anshun Wang,Shenghui Tu
The accumulation of antibiotics in aquatic ecosystems poses a serious threat to the environment and to human health. Tetracyclines (TC) account for a significant proportion of antibiotic residues worldwide. In order to overcome the limitations of conventional degradation methods, we created a three-component S-scheme heterojunction consisting of BiVO 4 /MWCNTs@NH 2 -UiO-66 (Zr) using a two-step solvothermal process. This synergistic integration utilises: (i) MWCNTs as electron transport bridges; (ii) NH 2 -UiO-66 (Zr) for high TC adsorption (surface area of 931.86 m 2 g −1 ); and (iii) BiVO 4 for visible light harvesting. This architecture broadens light absorption, reduces charge recombination and enables dual-pathway Reactive Oxygen Species (ROS) generation. Under visible light, the optimised catalyst achieves 95.2 % TC degradation within 90 min–7.73 times faster than pristine BiVO 4 (k = 0.02721 vs. 0.00352 L mg −1 ·min −1 ). Radical trapping and EPR analyses confirm ·O 2 − and h + as the dominant species, while LC-MS reveals three degradation pathways. With 85.3 % activity retention after five cycles, this work provides a blueprint for the design of efficient, antibiotic-mineralising photocatalysts.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Faman Lin,Jiaqi Geng,Yanxin Lv,Zhitan Huang,Daniel Scherman,Shuhai He,Hongji Li,Tingting Sun,Wei Sun
Pt@COOH-MWCNT/PVA/AM hydrogel is synthesized by in situ gelation method. • Hydrogel modified electrode is used to sensitive electrochemical analysis of BPA. • Good properties of conductivity, antibacterial and salt-resistant are realized. • The sensor has a wide range of 0.05–1000.00 μM and a low LOD of 0.045 μM. Bisphenol A (BPA), which is extensively employed in plastics and food-contact products, poses serious hazards to the ecological environment and human health because of its endocrine disruptor property. Owing to its wide usage and environmental persistence, sensitive, selective and rapid BPA detection is urgently required, particularly in seawater. In this work, a conductive hydrogel prepared by anchoring Pt nanoparticles (NPs) onto carboxyl-functionalized multi-walled carbon nanotubes (COOH-MWCNT) was used to modify a glassy carbon electrode (GCE) for BPA electrochemical detection. The morphology and structure of the resulting composite were characterized, which revealed a dense, three-dimensional porous conductive network with fast electron transport ability and good mechanical stability. The incorporation of Pt@COOH-MWCNT significantly improved both the electrical conductivity and the electrocatalytic oxidation performance toward BPA. The fabrication and electrochemical detection parameters were optimized. Under optimal conditions (0.1 M phosphate buffer solution, pH 6.0), the sensor exhibits a BPA linear response range of 0.05–1000.00 μM with a detection limit of 0.045 μM, along with superior anti-interference, good stability, reproducibility (RSD = 0.9%), excellent salt tolerance, and antibacterial activity. When applied to real seawater samples, the recoveries were ranged from 97.50% to 106.00% with a relative standard deviation below 3.5%, confirming the sensor's favorable accuracy and reliability. The proposed sensor integrates robust structural integrity, enhanced conductivity, high catalytic activity, cost-effectiveness, and antibacterial performance, which offers a new strategy for on-site rapid monitoring of BPA in seawater environments with great application potential. The detection of bisphenol A (BPA) in seawater remains challenging due to complex matrices and the lack of simple, low-cost sensing platforms, as conventional electrochemical sensors often involve tedious fabrication or suffer from limited performance. Herein, a Pt@COOH-MWCNT/PVA/AM conductive hydrogel is fabricated via a straightforward in situ gelation strategy, providing a facile and cost-effective approach. Exploiting the high conductivity of COOH-MWCNT, the electrocatalytic activity of Pt nanoparticles, and the porosity, antibacterial property, and salt tolerance of the PVA/AM matrix, the constructed sensor achieves sensitive BPA detection over a wide linear range (0.05–1000 μM) with a low detection limit (0.045 μM), along with good reproducibility, anti-interference capability, and stability. Satisfactory recoveries (97.50%–106.00%) obtained in real seawater samples confirm its analytical reliability. This work offers a promising strategy for developing robust, low-cost electrochemical sensors suitable for on-site monitoring of BPA in complex marine environments. Download: Download high-res image (144KB) Download: Download full-size image
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DOI
高影响因子
ANALYST
·
2025
·Vol. 150
·期 14
·3217-3224
·
IF 3.3
Jie Jiang,Xuening Wang,Kai Yu,Zhiping Sun,Qianyun Yu,Yang Chen
In order to achieve rapid extraction and sensitive detection of capsaicinoids, this study combined glass bead-assisted ultrasound extraction with a Bi2S3/rGO/MWCNT-COOH-modified screen-printed electrode. By integrating ethanol–water solvents and glass beads, the ultrasonic cavitation effect was enhanced, reducing the extraction time from 50 minutes to 22 minutes while maintaining high efficiency. The composite-modified SPE exhibited superior electrochemical performance, achieving a detection limit of 26 nM through differential pulse voltammetry (DPV). The response surface methodology optimized extraction parameters and real-sample validation demonstrated high reliability (recovery: 94.70–110.50%) and consistency with HPLC results. This approach offers a rapid, eco-friendly solution for on-site analysis of capsaicinoids in food safety and quality control applications.
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PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Chenguang Zhou,Peng Xiao,Huiling Huang,Jiangqi Huang,Jinyuan Sun,Siyao Liu
A novel Sin-QuEChERS cleanup method was developed for multi-pesticide residue analysis in Codonopsis radix by introducing a compressible composite adsorbent—isoreticular metal-organic framework-3 (IRMOF-3)/multi-walled carbon nanotubes (MWCNTs)-functionalized melamine sponge (MOF/MT@MeS). This innovative material enables one-step matrix cleanup through immersion and physical squeezing, eliminating the need for centrifugation and multiple sorbents required in conventional QuEChERS method. The covalent integration of amino-functionalized IRMOF-3 and MWCNTs exploits synergistic hydrogen bonding and π–π interactions for efficient purification. The composite significantly suppressed matrix effects (–12.7 to 17.4% vs –30.9 to 32.8%). Compared to traditional adsorbent materials, the composite yielded more consistent pesticide recoveries (90.4–117.9% vs 83.7–123.4%). The validated method exhibited excellent linearity (R², 0.9934–0.9991), high sensitivity (detection limits 0.54–8.33 μg/kg), and satisfactory accuracy with recoveries of 72.4–111.9% and RSD ≤14.1%. This work establishes functionalized sponge-based adsorbents as an efficient, rapid, and reliable alternative for pesticide monitoring in complex botanical matrices.
研究领域:
分析化学
·
药物代谢
·
食品安全
·
中药质量控制
·
环境污染物检测
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DOI
PubMed
高影响因子
Current Research in Food Science
·
2025
·
IF 7
Hai Chi,Yue Xiao,Houqi Ning,Xingzhong Zhang,Hongrui Chen,Jie Tang,Xuefei Wen
This study established a unified electrochemical sensing platform for the ultra-sensitive and rapid detection of foodborne pathogens. Targeting three representative pathogenic bacteria— Staphylococcus aureus , Escherichia coli , and Salmonella typhimurium —a composite sensing interface was fabricated by integrating MWCNT-COOH with MOF-818. Highly specific aptamers were directionally immobilized onto the MWCNT-COOH/MOF-818 composite surface through thiol-ene click chemistry, yielding an electrochemical biosensor with superior performance. Experimental results revealed detection limits of 3, 6, and 4 CFU mL −1 for the three target bacteria, respectively. Moreover, the sensor displayed strong detection capabilities in authentic food samples (pork paste). This detection strategy by integrating sample recognition and signal transduction within a single interface can be generalized to multiple pathogens via aptamer substitution, offering a novel technical approach for on-site rapid screening in food safety. This platform holds considerable potential for the prevention and control of foodborne diseases.
研究领域:
生物传感器
·
食品安全
·
纳米技术
·
分析化学
·
微生物学
·
电化学
·
材料科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）