ANALYST
·
2019
·Vol. 144
·期 16
·4897-4907
·
IF 4.019
Rui-Qian Zhang,Zhan-Qing Liu,Yan-Ling Luo,Feng Xu,Ya-Shao Chen
Novel nanocomposites consisting of polystyrene-block-polybutadienyl polyhexamethylene dicarbamate-block-polystyrene (PS-b-HTPB5-b-PS) and multiwalled carbon nanotubes (MWCNTs) were designed and prepared via noncovalent interactions. Scanning electron microscopy and transmission electron microscopy observations showed that segregated networks of MWCNTs were formed due to the cladding of PS-b-HTPB5-b-PS, presenting a parallel-arranged topology of the MWCNTs in a continuous PS-b-HTPB5-b-PS phase, which improved the dispersibility of the MWCNTs. The nanocomposites were fabricated into vapor sensing elements to detect CH2Cl2 vapor in the environment, exhibiting excellent responsive sensitivity, reproducibility and a low limit of detection (LOD) of 1 ppm when exposed to CH2Cl2 vapor. The chain extension of HTPB overcame the fragility and improved the tenacity of the thin films, and the responsivity was optimized by adjusting the content of the MWCNTs and the length of the PS chains. The newly developed conductive composites can be applied as a promising vapor sensor to accurately monitor CH2Cl2 vapor in the environment.
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Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 27
·22047-22056
·
IF 9.5
Rui Jiang,Jiarui Lin,Xiaoyan Shi,Botao Zheng,Qiaofeng Huang,Junling Xu,Lianyi Shao,Zhipeng Sun,Qingqing Zhang,Lifeng Hang
Aqueous zinc-ion batteries (AZIBs) are advantageous for grid-scale energy storage applications due to their high safety, cost-effectiveness, and environmental sustainability. However, developing high-rate and long-life cathodes for AZIBs remains a significant problem. Herein, a composite (Na3V2O1.6(PO4)2F1.4@rGO&MWCNTs) that integrates Na3V2O1.6(PO4)2F1.4 nanoparticles within a 3D conductive matrix comprising 2D reduced graphene oxide (rGO) and 1D multi-walled carbon nanotubes (MWCNTs) has been prepared through a microwave-assisted hydrothermal method followed by calcination, enhancing surface electronic conductivity to improve electrochemical performance. The Na3V2O1.6(PO4)2F1.4@rGO&MWCNTs cathode exhibits a high capacity of 98.4 mAh g−1 at 0.2 A g−1 and maintains a capacity of 52.8 mAh g−1 over 6000 cycles at 5 A g−1. The soft-pack battery demonstrates excellent cycling stability, maintaining stable performance over 1000 cycles at a high current density. Remarkably, it exhibits robust mechanical stability, delivering a stable output voltage even under various mechanical stress conditions. The outstanding performance arises from enhanced conductivity, high pseudocapacitive contribution, improved Zn2+ diffusion coefficients, low charge transfer resistance, robust structural framework, and reversible Zn2+ insertion/extraction mechanism verified by in situ electrochemical impedance spectroscopy, distribution of relaxation times, cyclic voltammetry, galvanostatic intermittent titration technique, ex situ X-ray diffraction, and ex situ X-ray photoelectron spectroscopy.
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POLYMER
·
2022
·
IF 4.432
Keqian Gong,Xiangyang Xu,Yanru Liu,Wei Huang,Qi Liu,Xuefeng Huang,Shanshan Wei
With polycarbonate (PC)/polyvinylidene fluoride (PVDF) co-continuous matrix as the substrate, composite transparent conductive films with excellent conductive properties were prepared by melt blending and rod coating method. After a surface sulfonation, the conductivity of PVDF films embedded with multi-walled carbon nanotubes (MWCNTs) decreased by three quarters. An ethylene glycol (EG) activated poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) layer was coated on PC/PVDF/MWCNTs to form a continuous and smooth surface, and its conductivity was increased by EG-induced phase separation. Owing to the excellent mechanical strength of PC and the toughing capacity of MWCNTs, the tensile strength of thin PC/PVDF/MWCNTs/PEDOT:PSS film attained 57.49 MPa, almost 3 times that of PVDF. The polymer-polymer or polymer-carbon tubes interaction featured as hydrogen bonding enhance the polarization of PVDF and phase separation of PEDOT:PSS. Meanwhile, sulfonated surface intensified this interaction and improved the lamellar compatibility. The increased PVDF β -phase, the PEDOT:PSS after a thorough phase separation and the well-dispersed carbon tubes all contributed to the densification of the matrix and the homogenized and continuous carrier-transferring property of the composite structure. Exhibiting a transparency surpassing 65%, PC/PVDF/MWCNTs/PEDOT:PSS film possesses a low surface resistivity (33.13 Ω/□). Moreover, owing to well dispersity of components and intensified interfacial bonding, a homogenous conductivity performance can be expected.
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RSC Advances
·
2014
·Vol. 5
·期 12
·8859-8867
·
IF 3.708
Wen Li,Pingxiao Wu,Shanshan Yang,Yajie Zhu,Chunxi Kang,Ly Tuong Tran,Beilei Zeng
3D hierarchical honeycomb nano-structured o-MWCNTs coupled with CoMnAl-layer double oxides have been successfully fabricated and characterized as a heterogeneous catalyst for bisphenol A (BPA) degradation using potassium monopersulfate (PMS) as oxidant. The role of MWCNTs was investigated and discussed in terms of surface morphology, structure, composition and catalytic activity of the as-prepared nanohybrid by investigation of SEM, TEM, XRD, XPS, and Raman measurements, etc. The results showed that catalytic performance of the CNTs–LDO can be significantly enhanced with the increase of o-MWCNTs content in the hybrids, and MWCNTs provided orientation/confinement for nanohybrid formation and the defects generated by calcination might increase PMS activation for the production of sulfate radicals.
研究领域:
环境科学
·
材料科学
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Jiahui Zheng,Bochao Ma,Xiaoqing Cui,Rui Wang,Li An,Bin Guo,Hongyan Zhang
Detecting ammonia (NH 3 ) is crucial for both the atmospheric environment and human health. However, developing low-cost, high-sensitivity, and flexible sensors for NH 3 is a significant challenge. Herein, we report a flexible, electrode-free NH 3 sensor based on an ink of polyaniline-covered MXene and multi-walled carbon nanotubes (MXene@PANI-MWCNTs), which was developed on cotton fabric using a dispensing print method. After optimizing the MXene@PANI-MWCNTs concentration, the number of sensor arms and the printed layers, the sensor exhibited a high response in the range of 0.5–25 ppm and can detect as low as 0.5 ppm NH 3 at 40% relative humidity (RH), room temperature (25°C). The response values were significantly higher than those for other interfering gases including H 2 , CO, H 2 S, and NO 2 . Furthermore, the sensor demonstrated excellent mechanical stability, with its response dropping by only 3.7% after 1000 bending cycles. When covered with expanded polytetrafluoroethylene (e-PTFE) film, the sensor showed stable performance in the ranging of 30%–90% RH at 25°C. Additionally, MXene@PANI-MWCNTs ink was printed on masks to detect NH 3 levels in breath, offering potential for medical diagnostics and personal health monitoring.
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ANALYTICAL CHEMISTRY
·
2026
·
IF 6.7
Chenxi Wang,Linzi Huang,Yixi Xie,Pengcheng Zhao,Junjie Fei
2-Chloro-4-nitrophenol (2C4NP) is a traditional organic pollutant whose toxicity constitutes a significant threat to both human health and environmental safety. Therefore, developing a method for the accurate detection of 2C4NP in natural environments is imperative. Consequently, we develop a photoelectrochemical sensing platform based on MWCNTs@In2S3/In2O3/GCE in this work. During the construction process, it is discovered that the introduction of MWCNTs accelerated the electron transport rate, which improved the separation efficiency of photogenerated electron–hole pairs in In2S3. Meanwhile, the MWCNTs@In2S3/In2O3 composite materials formed by MWCNTs@In2S3 and In2O3 not only exhibit an S-scheme heterojunction but also preserve the intrinsic advantages of MOFs-derived materials. This synergistic structure endows the composite materials with excellent optoelectronic performance and adsorption capability. Thus, the constructed photoelectrochemical sensing platform demonstrates promising potential for detecting 2C4NP, with a linear detection range from 3 nM to 5 μM. However, compared to some existing platforms, its detection range remains relatively narrow, which may represent an area for future improvement.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Mengyan Duan,Long Cao,Ni Wang,Jianxin Liu,Lulu Zhang,Jiancheng Wang
Photocatalytic water splitting is hindered by flammable H 2 /O 2 cogeneration and energy-intensive post-separation. Herein, a Ru/WO 3 -MWCNTs ternary composite is designed to address these bottlenecks via a hydrogen spillover-based strategy: direct H* storage instead of gaseous H 2 generation to achieve H 2 /O 2 separation. Photogenerated H* from Ru active sites migrate through WO 3 , then is immobilized on MWCNTs as C H bonds for hydrogen storage, enabling exclusive O 2 release during photocatalysis. This composite exhibits an oxygen evolution rate (OER) of 645.28 μmol g −1 h −1 (outperforming binary counterparts) with no detectable gaseous H₂ during irradiation, alongside a stable H₂ storage capacity of 2.23 wt%. The stored hydrogen is thermally releasable, and the entire cycle of photocatalytic water splitting (hydrogen storage with O 2 evolution) and thermal H 2 release maintains excellent cyclic stability. This work establishes hydrogen storage-aided in-situ H 2 /O 2 separation as a universal strategy for addressing the core bottlenecks in photocatalytic water splitting.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124778
·
IF 7.5
Nanke Ma,Huiling Peng,Anqi Wei,Yuan Jin,Guangli Li
The extensive use of ciprofloxacin (CIP) has raised growing concerns regarding environmental pollution, food safety, and public health, thereby driving an urgent demand for rapid, sensitive and cost-effective detection methods. Herein, an electrochemical sensing platform is constructed by integrating MIL-101(Fe) with MWCNTs-COOH, which synergistically couples the effective analyte preconcentration and catalytic Fe–O active sites of MIL-101(Fe) with the exceptional conductivity and large surface area of MWCNTs-COOH. Notably, the reversible Fe 2+ /Fe 3+ redox cycle in MIL-101(Fe) facilitates rapid electron shuttling, further amplifying the electrochemical signal toward CIP oxidation. This dual-functional interface enables simultaneous preconcentration and signal amplification, yielding a broad linear response spanning 0.05–15 μM, accompanied by a high sensitivity of 5.6492 μA·μM −1 , as well as an ultralow LOD of 0.006 μM. Additionally, this sensor also demonstrates outstanding selectivity, good repeatability, excellent reproducibility, and durable stability, retaining approximately 96.1% of its initial current signal after 21 days of storage. Furthermore, to rigorously validate practical feasibility, acceptable recoveries between 92.9% and 105.3% were measured in honey, tap water, and CIP eye drops, demonstrating its versatility across food, environmental, and pharmaceutical matrices. Overall, this work establishes a design blueprint for high-performance electrochemical sensors based on MIL-series MOF/carbon composites, opening new avenues for rapid, on-site antibiotic monitoring to ensure food safety, environmental protection, and pharmaceutical quality control.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Yunfeng Wang,Yingang Gui,Shasha He,Jiacheng Yang
In this study, through structural design, thin film doping modification, and electrode preparation, a high-performance triboelectric nanogenerator (TENG) has been achieved, and an electromagnetic generator is incorporated as an energy supplement to construct a self-powered sensing system for gas alarm and environmental monitoring. The high porosity of NiO derived from MOFs, high charge accumulation, and the high charge carrier mobility of N-MWCNTs promote charge capture and transfer, greatly enhancing the output performance of the triboelectric nanogenerator. Under the optimal doping ratio, the open-circuit voltage can reach 860 V, and the maximum short-circuit current up to 47 μA, sufficient to power 600 LEDs lights, achieving a power density of 10.45 W/m 2 . Meanwhile, MXene/Carbon/Ecoflex electrodes were fabricated to enhance the contact efficiency between the thin film and electrodes, further obtaining an open circuit voltage of 1020 V. This work provides a viable solution for the design of high-performance hybrid nanogenerators.
研究领域:
纳米技术
·
能量收集
·
材料科学
·
环境监测
·
传感器与执行器
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ACS Omega
·
2026
·
IF 5.2
Yili Li,Jinxin Fang,Xinyi Du,Liqiang Deng,Xiaoya Mo,Haijun Huang,Weiguo Cao
Herbal medicines are particularly vulnerable to contamination by polycyclic aromatic hydrocarbons (PAHs) due to their relatively long growth cycles and multistep processing. This contamination may compromise the efficacy and safety of the prepared herbal slices. The current work innovatively synthesized a hierarchical composite of MXene@Cu-BTC/PPy carbon with MWCNTs@MoS2 (MCuP350/MWCNTs@MoS2) through a sequential in situ growth approach. The material was characterized by using Field Emission Scanning Electron Microscopy (FE-SEM), High-Resolution Transmission Electron Microscopy (HR-TEM), X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FT-IR) techniques. The electrochemical sensor was prepared based on the MCuP350/MWCNTs@MoS2 composite, which exhibited excellent electrocatalytic activity, displaying good linear responses to both anthracene (ANT) and phenanthrene (PHE). The detection limits of the presented sensor were 0.604 μM (ANT) and 0.240 μM (PHE), respectively. In commonly used herbal medicine of licorice, the effectiveness of the developed sensor for detecting ANT and PHE was validated by the standard addition method, with satisfactory recoveries of 100.36%–104.75% and 97.43%–104.44%, respectively. Additionally, the sensor exhibits high selectivity against the potential interfering substances existing in licorice. These results confirm the feasibility of directly detecting PAHs in licorice via the developed sensor without the need for complex sample pretreatment.
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高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2026
·
IF 2.5
Yagang Li,Shuyan Huo,Yunhui Xing,Yonghang He,Wei Wu,Min Huang,Yiming Jiang,Guoping Zhong,Weiwei Zeng
Novel TiO 2 @MWCNTs composites were designed and synthesized, which exhibit potential as purification materials for phospholipid removal from rat plasma samples. • A dispersive solid-phase extraction method based on TiO 2 @MWCNTs showed the capacity to mitigate matrix effects in rat plasma samples for small-molecule analytes with low lg P . • An LC–MS/MS method was established and validated for quantifying representative drugs using TiO 2 @MWCNTs and applied to a pharmacokinetic study of metformin. The matrix effect is a prevalent interference in LC–MS/MS bioanalysis of small-molecule drugs, with lipids as a major source of such interference in plasma matrices. Leveraging the lipid-adsorbing capability of multi-walled carbon nanotubes (MWCNTs), this study synthesized TiO 2 @MWCNTs composites and developed a novel dispersive solid-phase extraction (d-SPE) method to reduce matrix effects in rat plasma. Lipid profiles were compared to characterize the lipid purification capacity of TiO 2 @MWCNTs in rat plasma samples. The matrix effects of representative small-molecule drugs, including metformin, amisulpride, and aripiprazole, were compared across TiO 2 @MWCNTs-based d-SPE, protein precipitation, and traditional solid-phase extraction. Method validation and sample determination were subsequently performed. The results demonstrated that TiO 2 could be successfully loaded onto MWCNTs. The responses of 72 differential lipid ions were significantly reduced by at least 2-fold after TiO 2 @MWCNTs treatment, and the IS-normalized matrix factors for metformin (from 13.69 to 20.00% to 31.49–44.39%) and amisulpride (from 71.01 to 84.82% to 91.69–101.48%) as well as accuracy for aripiprazole at low concentration were significantly improved compared with protein precipitation treatment. Method validation results confirmed excellent selectivity, accuracy, precision, and reproducibility. The validated method was also successfully applied to a pharmacokinetic study of metformin with pharmacokinetic parameters comparable to those reported previously. This study shows that the dispersive solid-phase extraction method based on TiO 2 @MWCNTs could act as a simple, rapid, low-cost and reliable pretreatment strategy to mitigate matrix effects for small-molecule analytes with low lg P in rat plasma as a proof-of-concept attempt.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 17
·7441-7455
·
IF 4.5
Wang Yijie,Li Qiulan,Xia Qinghai,Yang Yaling,Yang Dezhi
Sensitive and effective detection of xanthine oxidase (XOD) is essential for assessing human health. Herein, a dual-enzyme-based cascaded reaction system was developed for xanthine and xanthine oxidase assay based on the peroxidase (POD)-like catalytic activity of Fe 3 O 4 @MWCNTs/Hemin nanocomposite. The XOD could catalyze xanthine to produce H 2 O 2 , which is subsequently converted by Fe 3 O 4 @MWCNTs/Hemin into hydroxyl radicals (·OH) to oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a light blue. Notably, it is demonstrated that the modification of MWCNTs and Hemin could significantly enhance the POD-like activity from 9.78 × 10 −8 M s −1 ( V max value of Fe 3 O 4 ) to 23.34 10 −8 M s −1 ( V max value of Fe 3 O 4 @MWCNTs/Hemin), which makes the detection of xanthine oxidase more sensitive. By using the smartphone to capture the colorimetric signal of oxidized TMB (oxTMB), the assay can detect xanthine and XOD as low as 0.250 µM and 0.216 mU mL −1 , respectively. The reliability of the method in human serum suggested satisfactory spiked recoveries in the range of 92.350–105%. This work provided a new insight for Fe 3 O 4 -based nanozyme design and monitoring XOD level in blood. Graphical Abstract
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危险品化学品经营许可证（带存储）