JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
·
IF 3.807
Qixia Guan,Hao Guo,Rui Xue,Mingyue Wang,Xin Zhao,Tian Fan,Wenhu Yang,Mengni Xu,Wu Yang
An electrochemical sensing platform for simultaneous determination of dopamine (DA) and uric acid (UA) is constructed based on covalent organic framework materials (IL COF-1), aminofunctionalized carbon nanotubes (MWCNT-NH 2 ), and gold nanoparticles (AuNPs). The prepared sensor shows a good performance in detection of DA and UA due to porosity, large specific surface area, high conductivity and more active sites of the composite modified material. Under optimized experimental conditions, the constructed electrochemical sensor has sensitive response and good linearity to both DA and UA. Their wide linear ranges are 0.7–108 μM and 0.97–200 μM, and the detection limits are 0.21 μM and 0.29 μM (S/N = 3), respectively. The developed method has been successfully employed to determine the contents of DA and UA in dopamine injection and human urine samples. It has a satisfactory recovery rate, and the relative standard deviations (RSD) of three parallel determinations are all below 5.0%. In comparison, the constructed sensor platform has superior performance including low cost, simple structure, wide linear range and high sensitivity than some traditional methods, which is expected to be widely used in real sample analysis.
研究领域:
分析化学
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生物医学工程
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DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Chunyang Nie,Zhimin Ao,Xiaoguang Duan,Chengying Wang,Shaobin Wang,Taicheng An
Enhanced elimination of aniline in aqueous solution was achieved by coupling electrosorption of aniline and electrochemical activation of peroxydisulfate (PDS) at multi-walled carbon nanotube (MWCNT) cathode, in which a synergistic effect occurred. It was found that PDS could be effectively activated under a small voltage at MWCNT cathode owing to the specific pore structures of MWCNTs. A nonradical oxidation pathway instead of radical-based oxidation was proposed from the cathodic activation of PDS, wherein PDS molecules with a modified electronic structure was suggested to be the principal reactive species. Meanwhile, the influences of various operation parameters such as electrode potential, PDS concentration, presence of chloride ions on the elimination efficiency, and the stability of MWCNT electrode were also attempted. Therefore, the electrochemical activation of PDS by MWCNT cathode is a promising energy-saving method for the treatment of organic pollutants in wastewater.
研究领域:
环境科学
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电化学工程
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污染控制
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
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2018
·Vol. 6
·期 22
·5877-5887
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IF 5.976
Mei Li,Yunming Wang,Yun Zhang,Huamin Zhou,Zhigao Huang,Dequn Li
There is an urgent demand for flexible multifunctional sensitive electronic devices in several potential applications, including personalized health monitoring, human motion detection, human–machine interfaces, soft robotics, and so on. Although exciting progress has been witnessed in recent decades, the excessive dependence on inorganic sensors and flexible substrates makes it difficult to attain multi-function sensing and excellent flexibility simultaneously, as well as their complicated fabrication, technical barriers and high cost. Herein, we report on a family of flexible multi-functional sensitive nanocomposites consisting of multi-walled carbon nanotubes (MWCNTs) uniformly distributed in a high elastic form-stable phase change polymer (HEPCP) that exhibit dramatic response to infrared light (IR), temperature and tensile stress in air, together with outstanding flexibility and stretchability. Optimum sensitivity to on/off IR, temperature and tensile stress is demonstrated with electrical conductivity ratios of 103.7, 11.8 and 1084.0 times at room temperature, respectively. The excellent performance of the MWCNT/HEPCP nanocomposites was largely attributed to the cyclic and reversible changes of their MWCNTs conductive network owing to the reversible form-stable phase transitions and high elasticity of the HEPCP substrate, which subsequently affected the thickness of the interfacial HEPCP between adjacent conductive MWCNTs, and thereby the electron tunneling efficiency between the MWCNTs. The novel MWCNT/HEPCP nanocomposites open a new window for multi-function sensing of electronic skin.
研究领域:
材料科学
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柔性电子
·
传感器技术
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2019
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IF 9.518
Xue Zhang,Tao Yan,Tingting Wu,Yixuan Feng,Meng Sun,Liangguo Yan,Bin Du,Qin Wei
It is essential to develop a highly efficient detection platform for tetracycline (Tc). Herein, based on well-designed hierarchical MIL-68(In)-NH 2 /MWCNT/CdS composites as a highly efficient transducer, a label-free visible light driven photoelectrochemical (PEC) aptasensor was systematically fabricated. Characterization results indicate that the forming of MIL-68(In)-NH 2 /CdS heterojunction remarkable facilitated the transfer and inhibited the recombination of charge carriers. Moreover, the transfer properties of multiwalled carbon nanotubes (MWCNTs) further improved the photoelectric conversion efficiency by adjusting electron transport routes. The aptamer as a biorecognition unit was grafted on the modified electrode by chemical bonding effect, and Tc molecules could be captured through the specific interaction of aptamer and Tc in solution. The concentration of Tc was detected by observing the fluctuation of photocurrent signals. Under optimized conditions, the proposed aptasensor showed the broad linear range from 0.1 nmol L −1 to 1 μmol L −1 with a low detection limit (LOD) of 0.015 nmol L −1 . Furthermore, the high sensitivity, excellent reproducibility and favorable stability of the PEC sensing platform indicated the potential applications for antibiotic residues detecting in environmental media.
研究领域:
分析化学
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环境科学
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材料科学
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生物传感器
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产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
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2015
·Vol. 38
·期 8
·1640-1645
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IF 1.632
Lijun Cao,Xiaoqing Liu,Chao Li,Jingyue Dai,Jin Zhu
A biobased epoxy monomer (GA-II) derived from gallic acid for multiwalls carbon nanotubes’ (MWCNTs) dispersion improvement is reported in this article. The aromatic group in its molecular structure made it to be absorbed onto the surface of MWCNTs via π-π interactions and the GA-II anchored MWCNT could be homogeneously dispersed in DGEBA matrix via sonication. That was proved by Raman and UV spectroscopy as well as scanning electron microscope. After curing reaction, the epoxy/MWCNT composites demonstrated enhanced mechanical properties, excellent thermal conductivity, and high electrical conductivity. With the addition of only 0.5 wt% GA-II modified MWCNT, the tensile strength, tensile modulus, flexural strength, and flexural modulus of the composites were improved by 28%, 40%, 22%, and 16%, respectively. The thermal and electrical conductivities were also improved from 0.15 to 0.25 W/m K (67% increased) and from 0.7 × 10 −14 to 0.24 × 10 −4 S cm −1 (10 orders increased). POLYM. COMPOS., 38:1640–1645, 2017. © 2015 Society of Plastics Engineers
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yanrui Hao,Hao Guo,Fan Yang,Junye Zhang,Ning Wu,Mingyue Wang,Cuiliu Li,Wu Yang
Multi-walled carbon nanotube (MWCNT)/Ni-Mn-S composites are derived from MWCNT/Ni/Mn bimetallic metal-organic framework (MOF) for supercapacitor electrodes. Electroconductive MWCNT is introduced into Ni-Mn-S to form a three-dimensional interconnected structure due to the covalent interaction between Ni atoms and C atoms. During energy storage, MWCNT serves as miniature current collector to shorten pathway of electron collection and transmission. In addition, S 2- etching agent with Kirkendall effect makes edges and surfaces of the resulted sulfide structures rougher provide more active sites and improves electrochemical performance compared with precursors. By finely adjusting Ni/Mn molar ratio, the prepared MWCNT/Ni-Mn-S composite achieves excellent properties. As-prepared MWCNT/Ni-Mn-S(3:2) exhibits high specific capacitance of 1041 mAh g −1 at 1 A g −1 and good cyclic stability. The capacitance retention reaches 83.3% after 10,000 cycles. The assembled MWCNT/Ni-Mn-S(3:2)//AC hybrid supercapacitor (HSC) also shows high energy density of 25.33 Wh Kg −1 at power density of 829 W Kg −1 and outstanding cycling stability (93.3% after 20,000 cycles), which illustrates MWCNT/Ni-Mn-S(3:2) has important potential in supercapacitor.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Nano Research
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2021
·Vol. 15
·期 3
·2616-2625
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IF 8.897
Wang Duan-Chao,Yu Hou-Yong,Jiang Lurong,Qi Dongming,Zhang Xinxing,Chen Lumin,Lv Wentao,Xu Weiqiang,Tam Kam Chiu
If a person comes into contact with pathogens on public facilities, there is a threat of contact (skin/wound) infections. More urgently, there are also reports about COVID-19 coronavirus contact infection, which once again reminds that contact infection is a very easily overlooked disease exposure route. Herein, we propose an innovative implantation strategy to fabricate a multi-walled carbon nanotube/polyvinyl alcohol (MWCNT/PVA, MCP) interpenetrating interface to achieve flexibility, anti-damage, and non-contact sensing electronic skin (E-skin). Interestingly, the MCP E-skin had a fascinating non-contact sensing function, which can respond to the finger approaching 0–20 mm through the spatial weak field. This non-contact sensing can be applied urgently to human-machine interactions in public facilities to block pathogen. The scratches of the fruit knife did not damage the MCP E-skin, and can resist chemical corrosion after hydrophobic treatment. In addition, the MCP E-skin was developed to real-time monitor the respiratory and cough for exercise detection and disease diagnosis. Notably, the MCP E-skin has great potential for emergency applications in times of infectious disease pandemics.
研究领域:
材料科学
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医学
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生物工程
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DOI
PubMed
高影响因子
Analytical Methods
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2021
·Vol. 13
·期 42
·4994-5002
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IF 2.896
Hao Guo,Lei Sun,Meng Yang,Mingyue Wang,Ning Wu,Tingting Zhang,Junye Zhang,Fan Yang,Wu Yang
In this work, a covalent organic framework (COF) TAPT-TFP-COF containing a triazine ring was prepared by a typical Schiff base condensation reaction of 1,3,5-tris-(4-aminophenyl)triazine (TAPT) and 1,3,5-triformyl phloroglucinol (TFP). The TAPT-TFP-COF and carboxyl-functionalized multi-wall carbon nanotubes (COOH-MWCNTs) were drip-coated on glassy carbon electrode respectively to develop a novel and simple electrochemical sensor in order to simultaneously detect dopamine (DA) and paracetamol (PA). COOH-MWCNTs interconnected the TAPT-TFP-COF and acted as bridges between the COF particles, which had a good synergistic effect and accelerated electron transfer. Under optimal conditions, linear responses were obtained over the concentration range 1–190 μM for DA and PA with limits of detection (LOD) of 0.14 μM and 0.19 μM, respectively. Furthermore, the fabricated sensor possesses outstanding repeatability and high selectivity, and can be applied for the determination of DA and PA in dopamine injection and acetaminophen drugs with satisfactory recoveries.
研究领域:
分析化学
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材料科学
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生物医学工程
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DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
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2023
·Vol. 301
·期 5
·505-516
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IF 2.4
Zeng Jiaxuan,Chen Xi,Hu Mengyue,Zheng Kang,Zhang Xian,Tian Xingyou
Traditional single-function composite materials cannot meet the developing requirements in modern electronics. To build a three-dimensional (3D) skeleton is an efficient solution for multifunctional composites. However, it is a challenge for polymeric composites to provide thermal conductivity and electromagnetic shielding while maintaining good mechanical properties. Herein, we propose an oriented 3D hexagonal boron nitride (h-BN)/multi-walled carbon nanotube (MWCNT) skeleton structure with thermal conduction and electromagnetic shielding pathways by using ice template and carbonization method, in which the h-BN was connected with MWCNT and cellulose nanofiber (CNF), and the hydrolyzedmethyltrimethoxy silane (MTMS) was added to reinforce the structure. When MWCNT is 1.5 wt% and h-BN is 5.7 wt%, the electromagnetic shielding efficiency (EMI SE) reaches 48 dB, the absorption parameter (A) is more than 50%, and the out-of-plane thermal conductivity (TC) is 1.17 W/m·K. Compared with the randomly distributed BN/MWCNT composite at same filling rate, the electromagnetic shielding of 3D BN/MWCNT skeleton structure is 639.6% high than that of randomly distributed BN/MWCNT composite, and the thermal conductivity increased by 290%. Dynamic mechanical analysis (DMA) results indicated that the storage modulus increased by 48%, and Tg shifted 10 ℃ higher than pure epoxy, which enhances the mechanical properties of the composites. This study provides a valuable guidance for preparing composite with high thermal conductivities, high mechanical properties and satisfactory EMI SE, which showed great potential as the next-generation high-performance EMI shielding materials.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 16
·6103
·
IF 4.6
Lanlan Wei,Yanan Chen,Dongliang Shao,Jingjun Li
In this work, a sensitive analytical method based on packed-nanofiber solid-phase extraction (PFSPE), after derivatization with trichloroacetic acid and high-performance liquid chromatography with a fluorescence detector (HPLC-FLD), has been established for the determination of aflatoxins (AFs) in milk. Polystyrene polymeric multi-walled carbon nanotube (PS-MWCNT/OH) composite nanofibers were fabricated by electrospinning and used to prepare homemade extraction columns. The extraction efficiency of the HPLC-FLD analysis method was sufficiently investigated and validated. After the implementation of optimal conditions, all of the analytes were separated efficiently and the components of the milk matrix did not disturb the determination. The obtained linear ranges of the calibration curves were 0.2–20 ng/mL for AFTB1 and AFTG2, 0.1–10 ng/mL for AFTB2, and 0.4–40 ng/mL for AFTG1. The recoveries ranged between 80.22% and 96.21%. The relative standard deviations (RSDs) for the intra-day and inter-day results ranged from 2.81–6.43% to 3.42–7.75%, respectively. Generally, 11 mg of sorbent and 200 μL of elution solvent were used to directly extract all of the AFs from the milk matrix. Reported herein is the first utilization of PS-MWCNT/OH-PFSPE HPLC-FLD to simultaneously analyze the occurrence of aflatoxins in milk.Keywords:aflatoxins;packed-nanofiber solid-phase extraction (PFSPE);sample preparation;polystyrene polymeric multi-walled carbon nanotube (PS-MWCNT/OH);milk
研究领域:
食品科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Shuanghuan Gu,Sen Wang,Yongju Zhang,Zhixiang Xu,Longhua Xu
The development of sensitive and selective electrochemical sensors for antibiotic detection is critical to ensuring food safety. Herein, we report a novel biomimetic electrochemical sensor using a ternary AuNP/NiFe-LDH/MWCNT heterostructure combined with molecularly imprinted polymers (MIPs) for detecting enrofloxacin (ENR) in food. The AuNP/NiFe-LDH/MWCNT composite was prepared by in-situ reducing HAuCl 4 on a NiFe-LDH/MWCNT backbone, forming a heterojunction structure that enhances charge separation and electron transfer. Electropolymerization of pyrrole with ENR produced highly selective MIP layers. The synergistic integration of high conductivity, abundant catalytic sites, and selective molecular recognition endows the sensor with excellent electrochemical performance. The sensor exhibits a wide linear range (0.05–100.0 μM) and an ultralow limit of detection (LOD) 0.025 μM. It showed superior selectivity, reproducibility, stability, and applicability in complex aquatic food samples, with recoveries of 94.6 % to 103.9 %. This work paves the way for practical, high-precision monitoring of trace antibiotics in food safety applications.
研究领域:
电化学
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食品安全
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环境监测
·
分析化学
·
纳米材料
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生物传感器
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2026
·
IF 4.5
Lingyu Li,Jiahong Pang,Zhenzhen Tan,Hongjiao Li,Xiuling Cao,Yufeng Tan,Zejun Pu
This paper presents a comprehensive analysis of TPU/MWCNT absorbing composites, which were synthesized through the in-situ polymerization of polycarbonate diol (PCDL), 4,4-diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO), and hydroxylated multi-walled carbon nanotubes (MWCNT) in varying amounts. The study investigates the effects of MWCNT addition on the microstructure, mechanical properties, thermal stability, and wave absorption performance of the composites. Compared to neat TPU, the composite with 6 wt % MWCNT demonstrates an increase in tensile strength of 3.4 MPa (approximately 8.7%) and an elongation-at-break enhancement of 118%. Additionally, the temperature corresponding to 5% mass loss increases modestly from 308 °C to 324.5 °C. X-ray diffraction (XRD) patterns and scanning electron microscopy (SEM) images confirm that the MWCNT structure is well-preserved within the TPU and exhibits good dispersion. The uniform distribution of MWCNT in the TPU facilitates the formation of effective conductive pathways in the composites, resulting in significant dielectric loss for incident electromagnetic waves. The composites containing 6% MWCNT achieve full-frequency absorption of X-band electromagnetic waves, with a maximum absorption of -20.78 dB and a matching thickness of only 1.1 mm. Furthermore, the incorporation of MWCNT enhances the mechanical properties of the composites while exerting minimal impact on the thermal characteristics of TPU.
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DOI
高影响因子
危险品化学品经营许可证（带存储）