Analytical Methods
·
2024
·
IF 2.7
Huyue Wei,Mingzhu Yang,Chengshuai Huang,Xiaojie Yue,Jiabin Cai,Xinyi Wang,Kai Fan,Linxi Dong,Gaofeng Wang,Dujuan Li
Neuron-specific enolase (NSE), a tumor marker of small cell lung cancer (SCLC), has high application value in the early diagnosis of SCLC. In this study, a dual signal electrochemical aptasensor for NSE was constructed based on hemin/reduced graphene oxide/multi-walled carbon nanotube (H–rGO–MWCNT) nanocomposites. Hemin played a dual role, functioning not only as an in situ electrochemical probe but also exhibiting excellent peroxidase-like properties, effectively catalyzing the electroreduction of H2O2. Reduced graphene oxide and multi-walled carbon nanotubes exhibited excellent conductivity. Through their binding with hemin, the nanocomposites achieved a larger specific surface area, providing numerous active sites for capturing the NSE aptamer. In the presence of NSE, the specific adsorption between the antigen and the aptamer formed a stable antigen–aptamer structure, which inhibited the performance of hemin, resulting in the weakening of the electrochemical signals of hemin and H2O2. Leveraging these characteristics, the sensitive and cost-effective dual-signal electrochemical aptasensor has been fabricated for the detection of NSE. One signal corresponded to differential pulse voltammetry (DPV) of hemin, while the other signal was derived from chronoamperometry, capturing the catalytic reduction of H2O2. The linear ranges for NSE were 1 pg mL−1 to 1 μg mL−1 and 100 pg mL−1 to 100 ng mL−1 with the limit of detection (LOD) of 0.21 pg mL−1 and 11.22 pg mL−1 by DPV and chronoamperometry, respectively. In addition, this aptasensor exhibited good reproducibility, stability and specificity. The recovery of NSE in human blood serum samples was from 89% to 131%. It provided a promising strategy for the detection of NSE in clinical diagnostics.
研究领域:
生物医学工程
·
肿瘤学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2019
·Vol. 6
·期 4
·1259-1266
·
IF 7.704
Hanchen Ye,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
The discharge of large amounts of oily wastewater causes serious environmental pollution and is a threat to human health. It is therefore necessary to develop products to deal with the challenges posed by such wastewater discharges. One important area is the separation of oil/water emulsions. In this study, a modified multi-walled carbon nanotube film was fabricated. Polydivinylbenzene decoration and a POTS (1H,1H,2H,2H-perfluorooctyltriethoxysilane) layer were formed by a solvothermal method and chemical vapor deposition, respectively. The film had outstanding superhydrophobicity and demulsification, separated water-in-oil emulsions with high efficiency (99.98% for water-in-chloroform emulsion), and high reusability (above 99.7% after 20 cycles). Because of its self-healing ability, the film can maintain its superhydrophobicity after severe damage caused by O2 plasma treatment. These features make the film suitable for practical sewage treatment. The self-healing mechanism is also discussed in this article.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Huajing Zhu,Zeli Chen
Dye wastewater has the characteristics of high chroma, strong toxicity and difficult degradation, which has a serious impact on the environment. Because of its advantages of low energy consumption, simple operation and no secondary pollution, electrochemical oxidation technology has been increasingly studied in the field of refractory organic wastewater treatment. In this work, we report a multiwalled carbon nanotube (MWCNT)-MnO 2 nanocomposite as a Ni foam electrode modification. Then, the MWCNT-MnO 2 /Ni electrode is used for the electrochemical oxidation of Congo red dye. We study the effect of various factors on the decolorization of Congo red by the single-factor method. The results show that the decolorization rate of Congo red decreases with an increasing initial concentration and pH. In this work, hydroxyl radicals are detected by high-performance liquid chromatography. In the case of hydroxyl radicals and chloride ions acting separately, it is concluded that the indirect oxidation of chloride ions is the main mechanism during the process of electrocatalytic oxidation.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yaohui Dai,Ying Xu,Dexing Jiang,Long Bai,Zhiguo Li,Pengfei Huo,Changwei Liu,Yang Liu
Nowadays, various high-performance electromagnetic interference (EMI) shielding materials have enormous application potential in electronic field. However, traditional EMI shielding materials often have high conductivity, resulting in the serious mismatch between the impedance of the material surface and the free space, which will cause a large amount of reflection of electromagnetic (EM) waves, leading to secondary reflection pollution. In this paper, we report a novel flexible EMI shielding composite film with extremely low reflection loss and efficient EM wave absorption, which was prepared by assisted self-assembly based on simple vacuum filtration using carboxymethyl cellulose as the matrix and MWCNT@Fe 3 O 4 synthesized by chemical coprecipitation as the composite functional filler. By adjusting the Fe 3 O 4 coating degree of MWCNTs in the filler, the composite film achieved the construction of a conductive network with high Fe 3 O 4 content. Benefit by the good adaptability of conductivity and magnetic permeability, the composite film has good impedance matching ability and microwave absorption performance. The reflection loss of the composite film with the thickness of 28 μm in the X-band was only 0.23 dB, accounting for 1.7 % of the total loss. This work provides new insights for the development of EMI materials and effective mitigation secondary EM wave reflection pollution.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Lei Jiao,Zonggang Mu,Chengzhou Zhu,Qin Wei,He Li,Dan Du,Yuehe Lin
A dual enhancing strategy has been employed to develop electrochemical immunosensor for the ultrasensitive detection of AFP, which is enhanced by poly-dopamine functionalized N-doped multi-walled carbon nanotube (PDA-N-MWCNT) and the nanocomposite of graphene loaded Au@Pt mesoporous nanodendrites. The fabricated immunosensor exhibited a wide linear range of 0.1 pg/mL–10 ng/mL, with an ultralow detection limit of 0.05 pg/mL. The good performance of the developed immunosensor could be contributed to (1) PDA-N-MWCNT supplied good biocompatible surface for immobilizing primary antibody (Ab 1 ); (2) PDA-N-MWCNT modified electrode endowed more electrochemical active area, which can effectively improve the sensitivity of the immunosensor; (3) graphene could load high amount of good conductive and high electrocatalytic active Au@Pt nanodendrites for signal amplification . The results imply that the as-fabricated immunosensors have great potential for clinic usage.
研究领域:
分析化学
·
生物化学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Luheng Wang,Li Xu,Lijuan Lan,Xisi Long
A single spiral sensing unit based on carboxylated multi-walled carbon nanotubes composite dodecylbenzene sulfonic acid-doped polyaniline (MWCNT-COOH@DBSA-PANI) is shown in this research to be capable of detecting both NH 3 concentration and non-contact gap. The sensing unit effectively detects NH 3 concentrations (0–50 ppm) and non-contact gap (0–5 mm), showing a 46.740 % relative change in resistance at 20 ppm NH 3 and superior selectivity (greater relative change in resistance/impedance amplitude/impedance angle to NH 3 than to HCHO/DMF/ethanol/n-hexane). Additionally, within the non-contact gap range of 0–5 mm, it achieves impedance amplitude/angle sensitivity of 1.5652 %/mm (NH 3 : 50 ppm) and 2.2110 %/mm (NH 3 : 0 ppm), respectively. Stability test over 30 days shows relative standard deviations (RSD) of relative change in resistance, impedance amplitude and impedance angle to NH 3 remain below 10.7 %, 9.6 %, and 8.4 %, respectively. Furthermore, the RSD values for its impedance amplitude/angle sensitivity to gap (0–5 mm) do not exceed 8.0 %/7.6 %, correspondingly. When humidity increases from 31 % RH to 75 % RH, the relative change in resistance to 20 ppm NH 3 decreases from 46.740 % to 40.248 %. Finally, by employing the variable separation strategy, the feasibility of dual-function detection is further validated. At a known humidity, NH 3 concentration is determined by the relative change in resistance of sensing unit to NH 3 adsorption. Gap variation is perceived by detecting electromagnetic field disturbances from an approaching target object, manifested as change in the impedance amplitude/angle of the sensing unit. The work establishes a methodological foundation for environmental safety monitoring in confined spaces and real-time operational safety of precision equipment.
研究领域:
传感器与传感技术
·
材料科学
·
环境监测
·
电气工程
·
纳米复合材料
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Pei Wang,Guanyu Deng,Hongtao Zhu,Hongbo Zhang,Jian Yin,Xiang Xiong,Xiaoguang Wu
Multi-walled carbon nanotube (MWCNT) and carbon fiber and flaky graphite reinforced copper foam/furan resin composite for a novel sliding contact material was fabricated using an acid purify and ultrasonic dispersion technology, followed by a mold pressing process. The microstructure, electrical resistivity, impact strength and current-carrying friction performances of the composites were measured to investigate the effect of the different MWCNT contents. The results showed that the MWCNTs had a good dispersion state in the composite and the percolation threshold was approximate 0.074–0.185 vol%. As addition of the MWCNTs, the impact strength and wear resistance of the composites could be raised by 45% and 22%, respectively.
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Yuan Jin,Yanhong Zhang,Nanke Ma,Guangli Li
A novel Pt/TiO 2 /MWCNT-COOH nanocomposite was fabricated for ultrasensitive fleroxacin detection. • The synergistic effect of MWCNT-COOH and Pt/TiO 2 effectively prevents nanoparticle agglomeration and enhances electron transfer. • The sensor exhibits a wide linear range (0.01–10 μM), a low detection limit (0.002 μM), and excellent anti-interference capability. • Long-term stability of 90.3% after 25 days demonstrates outstanding practical durability. • Successful application in tap water and milk samples with recoveries of 98.4%–105.1% confirms real-world feasibility. A novel electrochemical sensor based on a Pt/TiO 2 /MWCNT-COOH nanocomposite was developed for the ultrasensitive detection of fleroxacin (FLX). To construct this platform, Pt/TiO 2 nanoparticles were first synthesized via a hydrothermal method and then uniformly anchored onto carboxylated multi-walled carbon nanotubes through ultrasonic-assisted dispersion. Various characterizations confirmed the successful formation of this heterogeneous structure, which effectively mitigated nanoparticle agglomeration and provided a significantly expanded electroactive area. As a result of this unique architecture, the Pt/TiO 2 /MWCNT-COOH/GCE exhibited substantially enhanced electrocatalytic activity toward FLX oxidation compared to bare and single-component modified electrodes, an improvement attributed to the synergistic effect between the excellent conductivity of MWCNT-COOH and the high catalytic activity of Pt/TiO 2 . Under optimized conditions, the sensor demonstrated a wide linear range (0.01–10 μM), a low limit of detection (0.002 μM), as well as remarkable anti-interference capability, good reproducibility, and long-term stability (sustained 90.3% for 25 days). Benefiting from these outstanding analytical properties, the sensor was successfully applied to detect FLX in tap water and milk samples, achieving satisfactory recoveries ranging from 98.4% to 105.1%. These results highlight its significant potential for antibiotic residue monitoring in complex real-world samples. Scheme 1. Schematic representation of the fabrication of Pt/TiO 2 /MWCNT-COOH/GCE for the sensitive determination of FLX. A Pt/TiO 2 /MWCNT-COOH nanocomposite was constructed as an electrochemical sensing platform for fleroxacin (FLX). The three-dimensional conductive network effectively prevents nanoparticle agglomeration and provides abundant active sites. The sensor achieves a wide linear range (0.01–10 μM), low detection limit (0.002 μM), and excellent stability (90.3% after 25 days). Successful FLX detection in tap water and milk demonstrates its practical application potential. Download: Download high-res image (119KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2025
·
IF 4.2
Hengqian Jin,Shufei Wei,Yunpeng Jiang,Huarong Nie,Xinping Zhang,Aihua He
In this study, snowman-like Janus particles (PDVB/PS@SiO 2 ) were proposed as carriers of Ag nanoparticles (Ag@J) to construct a hierarchical hybrid conductive powders by further admixing with MWCNTs for the development of high-performance microwave-absorbing materials. The Ag@J/MWCNT composite powders have several advantages in microwave absorption, such as the polarization of SiO 2 hemispheres, multiple reflections and scattering of electromagnetic waves in the hollow cavity of PDVB/PS hemispheres, improved conductivity and dielectric loss originating from the dense deposition of Ag nanoparticles and incorporation of MWCNTs. Furthermore, the composite powders allow the interfacial polarization and favorable impedance matching. Notably, the asymmetric hemispheres of the Ag@J particles result in close packing, further reducing the transmission of electromagnetic waves. The Ag@J particles demonstrated a minimum reflection loss (RL min ), indicating their potential application in microwave absorption. When further integrated with MWCNTs, the Ag@J/MWCNT composite powders, containing 36.4 wt% of Ag@J, exhibited strong absorption (−27 dB), wide absorption bandwidth (16.5 − 18 GHz), and a low thickness (5.5 mm). The Janus particles reported in this study show high potential applications in microwave-absorbing powder materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Zihan Zhang,Zheng Wei,Jiyue Qin,Jiangbo Cheng,Sheng Hong
In this work, a core-shell structure powder containing Ti 3 C 2 T x (MXene) and multi-walled carbon nanotube (MWCNT) was synthesized, and the corresponding composite coating was deposited onto the substrate by high-velocity oxygen-fuel (HVOF) spraying. The structural integrity of MWCNT was well-preserved. With the incorporation of MWCNT and MXene, porosity increased from 1.31 % to 1.73 % while H/E ratio enhanced. Compared to the pristine coatings, the reinforced coatings demonstrated superior performance in creep displacement and plastic deformation. This coating further exhibits strain rate sensitivity, with a tendency toward increased plastic deformation as the strain rate rises. The creep mechanism is ascribed to the synergistic effects of multiple deformation modes, including MXene stretching, MWCNT bridging, dislocation and grain boundary sliding.
研究领域:
材料科学
·
表面工程
·
复合材料
·
纳米材料
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Guangli Li,Xuan Wan,Qian Zheng,Mengyu Yang,Yonghui Xia,Xiaoman Qi,Tianyu Wang,Zhi Wu
The overuse of gatifloxacin seriously pollutes the environment and cause potential harm to our health. Hence, it is imperative to develop a rapid and sensitive method for gatifloxacin determination. Herein, an efficient electrocatalyst was designed for the voltammetric determination of gatifloxacin based on carboxylated multiwalled carbon nanotubes warped ZnCo 2 O 4 nanoparticles (ZnCo 2 O 4 /MWCNT-COOH). The ZnCo 2 O 4 nanoparticles were synthesized by a green deep eutectic solvent-mediated ion-thermal route, and further composited with MWCNTs-COOH. The ZnCo 2 O 4 / MWCNT-COOH combined the catalytic activity of ZnCo 2 O 4 with the high electrical conductivity of MWCNT-COOH, aiming to improve the electrochemical sensing performance toward gatifloxacin. The synergistic interactions between ZnCo 2 O 4 and MWCNT-COOH endowed the ZnCo 2 O 4 /MWCNT-COOH with extraordinary catalytic activity for gatifloxacin oxidation . Consequently, the ZnCo 2 O 4 /MWCNT-COOH displayed a wide linear response range (0.01–10 μM) for detecting gatifloxacin, with a high sensitivity (29.64 μA μM −1 cm −2 ) and low detection limit (2.0 nM). The ZnCo 2 O 4 /MWCNT-COOH showed robust voltammetric responses against potential interfering species, and maintained highly stable responses for at least two weeks. Moreover, the ZnCo 2 O 4 /MWCNT-COOH/GCE was successfully used to detect gatifloxacin in water samples with satisfactory recoveries (97.22 − 104.5 %). Together with its low cost, environment friendly and rapid response, the ZnCo 2 O 4 /MWCNT-COOH shows promising prospects in trace detection of gatifloxacin.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 236
·期 1
·1-16
·
IF 3.8
Zheng Lijia,Cao Shoutao,Tang Meng,Ge Ming
A solvothermal route was used to synthesize manganese ferrite/multi-wall carbon nanotubes (MnFe 2 O 4 /MWCNT) composite catalyst, which was firstly employed to activate peroxymonosulfate (PMS) to eliminate rhodamine B (RhB) from water. The catalytic activity of the as-obtained MnFe 2 O 4 /MWCNT for PMS activation and RhB degradation was higher than that of MnFe 2 O 4 and MWCNT. The optimal MnFe 2 O 4 /MWCNT-10 catalyst (0.3 g/L) can remove 98.1% of RhB (20 mg/L) from water by activating PMS (1.0 g/L) after 100 min of reaction, and this catalyst remained stable in the oxidation process. Quenching experiments, X-ray photoelectron spectroscopy (XPS) and electrochemical analysis demonstrated that RhB elimination in the MnFe 2 O 4 /MWCNT-PMS system was accomplished by the non-radical ( 1 O 2 and electron transfer) and free radical (O 2 •− , SO 4 •‒ and •OH) oxidation pathways, and 1 O 2 played a leading role. The influence of operational factors (PMS dosage, initial solution pH, catalyst dosage, reaction temperature, common inorganic anions and water matrix) on RhB removal by MnFe 2 O 4 /MWCNT-10 activated PMS was investigated in detail. The presence of Cl ‒ ions significantly boosted RhB degradation due to the production of more 1 O 2 .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）