CHEMOSPHERE
·
2021
·
IF 7.086
Yafei Zhang,Xin Li,Jie Liang,Yuan Luo,Ning Tang,Shujing Ye,Ziqian Zhu,Wenle Xing,Jiayin Guo,Hui Zhang
Nanoplastics and carbon nanotubes (CNTs) is one of the emerging environmental contaminants and a widely used engineering nanomaterial , and their biological toxicity has been frequently studied. However, there has been no research on the combined exposure of these two totally different shape nanoparticles . To explore their potential threat to freshwater ecosystems, Microcystis aeruginosa ( M. aeruginosa ) was exposed to concentration gradients of polystyrene nanoplastics (Nano-PS) and multi-walled carbon nanotubes (MWCNTs). The physiological analysis and whole-transcriptome sequencing were integrated to certify the cytotoxicity. As the physiological results showed, the low concentration (5 mg/L) of these two nanoparticles showed a stimulation on the growth (6.49%–12.2%) and photosynthesis (0–7.6%), and the coexposure was slightly higher than individuals. However, other concentrations showed inhibitory effect, especially at high concentration (50 mg/L), and all physical signs and electron microscope images showed obvious cytotoxicity. Compared with the individuals, the coexposure showed an antagonistic effect induced by the heterogeneous agglomeration which decreased the surface toxicity and the contact with algae of nanomaterials. Transcriptome results showed that coexposure treatment had the fewest differential genes, and the primary effects embodied in the disturbances of cellular and metabolic processes which were superior to the individuals. In the 50 mg/L Nano-PS, the translation process was significantly disordered, and MWCNTs could disrupted the photosynthesis, multiple metabolism processes, membrane transport, and translation. These findings demonstrated the aquatic toxic mechanism from cellular and metabolic processes of Nano-PS and MWCNTs for M. aeruginosa and provided valuable data for environmental risk assessment of them.
研究领域:
环境科学
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毒理学
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水生生物学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Zhikun Wang,Zhihua Zhao,Chen Chen,Guixin Jin,Xiaoqing Shen,Zhigang Shao,Lan Wu
Environmental safety monitoring has significantly benefited from the incorporation of gas sensors. Given the pernicious effects of ammonia and acetic acid gases on the environment and human health, it is imperative to develop a room temperature dual-functional gas sensor capable of simultaneously detecting both these gases. In this research endeavor, acid-functionalized multi-walled carbon nanotubes (f-MWCNTs) were integrated with Bi 2 S 3 through a hydrothermal approach, leading to the fabrication of a Bi 2 S 3 /f-MWCNTs-2 nanocomposite-based chemoresistive gas sensor. The results demonstrate that the Bi 2 S 3 /f-MWCNTs-2 sensor exhibits a response value of 52.7 % towards 100 ppm NH 3 at room temperature (25℃), displaying a declining resistance curve upon exposure to the target gas. Similarly, for 100 ppm CH 3 COOH under ambient conditions (25℃), the sensor records a response value of 72.55 %, accompanied by a rising resistance curve when in contact with CH 3 COOH gas. The distinctive feature of this dual-functional sensor lies in its ability to detect opposing transient response curves for the two gases, which is crucial for distinguishing between different gases. Furthermore, the sensor boasts swift response recovery, excellent repeatability, and robust stability. This study underscores the promising potential of the Bi 2 S 3 /f-MWCNTs-2 nanocomposite sensor in applications such as environmental monitoring.
研究领域:
材料科学
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环境科学
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传感器技术
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产品关联
DOI
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Haipeng Dong,Xiaowei Li,Yu Liu,Wanying Cheng,Xinghua Li,Dongxiao Lu,Changlu Shao,Yichun Liu
Wearable gas sensors have drawn great attention for potential applications in health monitoring, minienvironment detection, and advanced soft electronic noses. However, it still remains a great challenge to simultaneously achieve excellent flexibility, high sensitivity, robustness, and gas permeability, because of the inherent limitation of widely used traditional organic flexible substrates. Herein, an electrospinning polyacrylonitrile (PAN) nanofiber network was designed as a flexible substrate, on which an ultraflexible wearable gas sensor was prepared with in situ assembled polyaniline (PANI) and multiwalled carbon nanotubes (MWCNTs) as a sensitive layer. The unique nanofiber network and strong binding force between substrate and sensing materials endow the wearable gas sensor with excellent robustness, flexibility, and gas permeability. The wearable sensor can maintain stable NH3 sensing performance while sustaining extreme bending and stretching (50% of strain). The Young’s modulus of wearable PAN/MWCNTs/PANI sensor is as low as 18.9 MPa, which is several orders of magnitude smaller than those of reported flexible sensors. The water vapor transmission rate of the sensor is 0.38 g/(cm2 24 h), which enables the wearing comfort of the sensor. Most importantly, due to the effective exposure of sensing sites as well as the heterostructure effect between MWCNTs and PANI, the sensor shows high sensitivity to NH3 at room temperature, and the theoretical limit of detection is as low as 300 ppb. This work provides a new avenue for the realization of reliable and high-performance wearable gas sensors.
研究领域:
材料科学
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纳米技术
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可穿戴技术
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传感器技术
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
·
IF 3.807
Xiaoyu Zhu,Peng Liu,Yu Ge,Ruimei Wu,Ting Xue,Yingying Sheng,Shirong Ai,Kaijie Tang,Yangping Wen
Electrochemical nanozyme sensor coupled with machine learning (ML) for intelligent analysis of carbendazim (CBZ) residues in tea and rice samples using graphene-like molybdenum disulfide (MoS 2 )/multi-walled carbon nanotubes (MWCNTs) porous nanohybrid network with oxidase-like characteristic was developed. MoS 2 /MWCNTs porous nanohybrid network was prepared by ultrasonic dispersion of MWCNTs into MoS 2 aqueous dispersion that was obtained by ultrasonic-assisted dispersion in sodium carboxymethyl cellulose water solution, which displayed low electron transfer resistance, high effective surface area, excellent film electrode stability. Machine learning via the artificial neural network for the intelligent analysis of CBZ was discussed in comparison with traditional regression analysis. Good electrocatalytic capacity, unique oxidase-like characteristic, wide linear range with 0.04–100 μM, low limit of detection with 7.4 nM, high sensitivity, and satisfactory practicability for CBZ demonstrated that electrochemical nanozyme sensor for the intelligent analysis of CBZ residues in edible agro-products was feasible. This will provide a new electrochemical sensing platform for the development of a graphene-like nanozyme sensor and its intelligent analysis of CBZ in food and agro-product safety.
研究领域:
食品科学
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环境分析化学
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纳米生物技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhenji Zhou,Miaomiao Zhang,Shaoyun Huang,Zhong Li,Xiaoqing Guan,Yafeng Deng
Compared to traditional magnetic wave-absorbing materials, paramagnetic electromagnetic wave-absorbing materials have garnered significant attention in microwave absorption due to their advantages, including low density, wide bandwidth, and thin structure. The polarization mechanism and dielectric loss are key factors determining the electromagnetic absorption performance of these materials. In this study, BaTiO₃@MnO₂/MWCNTs (BTMC) hybrid composites were prepared using a two-step solvothermal method, and the electromagnetic absorption performance was optimized by adjusting the MWCNTs loading in the absorber and the absorber-to-paraffin ratio. The synergistic effect of BaTiO₃'s excellent dielectric properties, the anisotropy of MnO₂ with different morphologies (urchin-like α-MnO₂ nanosheets and rod-like β-MnO₂), and the high conductivity of MWCNTs enhanced the electromagnetic absorption capacity of the BTMC hybrid composite. The study showed that when the paraffin wax-to-absorber ratio was 7:3 and the MWCNT loading in the absorber was 10 wt%, the composite material (BTMC-10) achieved a reflection loss (RL min ) of −74.06 dB and an effective absorption bandwidth of 1.27 GHz at a thickness of 4.75 mm. This provides a new research direction for developing high-performance, lightweight, broadband, and efficient paramagnetic electromagnetic wave-absorbing materials, demonstrating their potential applications in the microwave field.
研究领域:
材料科学
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电磁学
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纳米技术
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微波工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2018
·Vol. 53
·期 14
·10147-10159
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IF 2.993
Wu Xiao-Qiong,Shen Jiang-Shan,Zhao Fei,Shao Zai-Dong,Zhong Lu-Bin,Zheng Yu-Ming
Semiconductor photocatalysis is a promising technology for removing contaminants from water. Particularly, visible-light photocatalysis has attracted much attention because of its potential to utilize solar energy. However, nano-sized visible-light-driven photocatalysts easily aggregate during water treatment. Besides, it is difficult to recycle them from treated systems. Therefore, it is of great importance to develop visible-light-responsive immobilized photocatalysts with high activity. In this work, MWCNTs/Ag 3 PO 4 /polyacrylonitrile (PAN) ternary composite fiber membranes (TCFMs) with good photocatalytic performance were fabricated by electrospinning technique combined with in situ Ag 3 PO 4 forming reaction. Due to the addition of MWCNTs, the band gap of MWCNTs/Ag 3 PO 4 /PAN TCFMs became narrower than that of Ag 3 PO 4 /PAN binary composite fiber membranes (BCFMs), which made MWCNTs/Ag 3 PO 4 /PAN TCFMs be able to use light at longer wavelengths. Compared with Ag 3 PO 4 /PAN BCFMs, the as-prepared MWCNTs/Ag 3 PO 4 /PAN TCFMs showed enhanced photocatalytic activity and stability for degrading rhodamine B (RhB) in batch processing systems, which mainly ascribed to fast electron transfer from Ag 3 PO 4 to MWCNTs and the resulting high electron–hole (e − –h + ) separation efficiency. Radical trapping experiments revealed that holes (h + ) and superoxide radicals ( · O 2 − ) played primary roles in RhB degradation. In addition, the flexible MWCNTs/Ag 3 PO 4 /PAN TCFMs also showed potential practical application in the continuous wastewater treatment by a suitable photocatalytic membrane reactor. This work provides a facile approach to prepare flexible supported photocatalytic membrane with visible-light response, high activity and good stability.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Saijin Wang,Huiting Mao,Meng Wang,Ximing Cui,Ye Li,Yuxin Cao,Jiazheng Jin,Shi Zhou,Jinlian Li,Guogang Shan
Abnormal purine metabolism can result in oxidative stress and endothelial dysfunction, heightening the risks for conditions such as gout and cardiovascular disorders, which may subsequently trigger various physiological dysfunctions. Thus, the rapid and sensitive detection of metabolic abnormalities in purines is crucial for the early diagnosis and prevention of related diseases. Zebrafish has emerged as a popular model organism in metabolic, genetic, and toxicological studies due to its high genetic similarity to humans and the transparency of its embryos, facilitating observation. In this study, we developed a novel electrochemical sensor based on m OMe-Ir-PI/MWCNTs@PDA/GCE to detect purine molecules sensitively. Using this method, we analyzed the electrochemical behavior of zebrafish embryos, correlating the electrochemical signals with X/G and HX/A. Investigating purine metabolism in zebrafish embryos across different developmental stages, we found that from the cleavage stage to the somite formation stage, the activity of degrading enzymes increased, leading to enhanced purine oxidative degradation and the activation of metabolic pathways. This resulted in a decline in purine content, observed as decreasing electrochemical signals. Conversely, from the somite formation stage to hatching, cell differentiation, tissue formation, and organ development accelerated, leading to an increase in purines involved in energy metabolism and biosynthesis, which was reflected in rising electrochemical signals. This study represents the first application of electrochemical methods for detecting purine metabolism in zebrafish embryos throughout various developmental stages, thus providing insights into the role of purine metabolism in early life development.
研究领域:
生物化学
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分析化学
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发育生物学
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电化学
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分子生物学
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毒理学
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遗传学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Qiulan Li,Jitao Li,Yang Jiao,Xiaolan Yang,Dezhi Yang,Zitao Zhong,Yaling Yang
The pathogenic bacteria induced foodborne disease has been detrimental to public health worldwide. Herein, the peroxidase (POD)-like Fe 3 O 4 /MWCNTs@Mo-CDs (FMMC) nanozyme was applied for the detection of Escherichia coli ( E. coli ). The E. coli aptamer was conjugated with the surface of the FMMC, which effectively enhanced the POD-like activity attributing to the higher affinity to the substrate, and then specific capture of E. coli in food matrices, leading to the reduction of POD-like activity. Therefore, a robust and facile colorimetric aptasensor was developed for detecting E. coli with a wide linear range of 10 1 –10 6 CFU/mL, low LOQ of 10 1 CFU/mL and LOD of 0.978 CFU/mL. The aptasensor demonstrated the satisfied selectivity for E. coli compared to the other strains. This method possessed the potential application for fast in situ screening of foodborne pathogens in food products.
研究领域:
纳米技术
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生物技术
·
食品科学
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分析化学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Yixin Liu,Yifeng Zhang,Dan Wu,Dawei Fan,Xuehui Pang,Yong Zhang,Hongmin Ma,Xu Sun,Qin Wei
In this work, a label-free photoelectrochemical (PEC) immunosensor was developed for ultrasensitive detection of insulin based on MWCNTs@SnS 2 @CdS nanocomposites . As graphene-like 2D nanomaterial , SnS 2 nanosheets loaded on the conducting framework of multi-walled carbon nanotubes (MWCNTs) were adopted for the construction of immunosensor for the first time, providing a favorable substrate for in-situ growth of CdS nanocrystal that had suitable band structure matching well with SnS 2 . The well-matched band structure of these two metal sulfides effectively inhibited the recombination of photogenerated electron-hole pairs, thus improving the photo-to-current conversion efficiency. Besides, the introduction of MWCNTs facilitated electron transfer across the surface of electrodes, leading to a further increment of photocurrent . The as constructed label-free PEC immunosensor based on MWCNTs@SnS 2 @CdS nanocomposites exhibited excellent PEC performance for the detection of insulin. The concentrations of insulin could be directly detected based on the decrement of photocurrent that was brought by the increased steric hindrances due to the formation of antigen-antibody immunocomplexes. Under the optimal conditions, the PEC immunosensor had a sensitive response to insulin in a linear range of 0.1 pg mL −1 to 5 ng mL −1 with a detection limit of 0.03 pg mL −1 . Meanwhile, good stability and selectivity were achieved as well. The design and fabrication of this PEC immunosensor based on MWCNTs@SnS 2 @CdS nanocomposites not only provided an ideal platform for the detection of insulin, but also opened up a new avenue for the development of immunosensor for some other biomarkers analysis.
研究领域:
分析化学
·
生物传感器
·
纳米技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Ruidong Zhou,Xinyuan Zhang,Yupeng Wen,Wendi Huo,Yingchun Mu,Huan Liu,Chaoying Zhang,Jincheng Li
Multi-walled carbon nanotubes (MWCNTs) are known for their excellent purification properties in QuEChERS-based pesticide analysis, but their potential release and non-recyclability pose environmental and economic challenges. In this study, a novel strategy is proposed to immobilize MWCNTs with chitosan, forming the MWCNTs@chitosan composite, which enables the recyclability of MWCNTs. This composite was employed in a one-step pressure filtration purification method to simultaneously purify extracts of 49 pesticides from aquatic products. Coupled with HPLC-MS/MS, an optimized QuEChERS method was successfully validated for the determination of 49 pesticides. The MWCNTs@chitosan composite demonstrated excellent clean-up capability, effectively removing interfering substances from crude extracts while maintaining recoveries of 71.2–119.4 % and relative standard deviations (RSDs) below 20.0 %. These results demonstrate the composite’s suitability as a QuEChERS cleanup material, with potential applications in other complex matrices.
研究领域:
环境科学
·
分析化学
·
食品安全
·
纳米技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SYNTHETIC METALS
·
2020
·
IF 3.286
Peng Zhang,Bin-bin Wang,Qiu-jin Xia,Jian Zou
Herein, a series of electrically conductive polyurethane composites with multi-walled carbon nanotubes (PU/MWCNTs) were in-situ polymerized according to tailoring the segmented PU molecules. The ultralow percolation threshold of MWCNTs (0.057 wt%) in the composites was achieved and the electrically conductive properties were markedly enhanced. The conductivity in PU@MWCNTs1-0.5 % and PU@MWCNTs2-0.5 % was lower than 1.0 × 10 −1 ° S m -1 . While PU@MWCNTs3-0.5 % had the conductivity of over 1.0 × 10 -6 S m -1 , almost 4 orders of significance, which was attributed to the increasing of hard segments on the PU molecule. Furthermore, the high piezoresistive properties of the composites were also observed. Therefore, this work had the important sense in decreasing the low percolation thresholds of conductive polymer composites.
研究领域:
材料科学
·
高分子科学
·
纳米技术
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xiaojie Shi,Huimin Liu,Mei Zhang,Fengzhen Yang,Jiansen Li,Yemin Guo,Xia Sun
An ultrasensitive aptasensor based on luminol-hydrogen peroxide (H 2 O 2 ) electrochemiluminescence (ECL) system was proposed for determination of profenofos. AuNPs decorated with MWCNTs ( [email protected] ) were used to provide a favorable microenvironment for luminol loading and improve the ECL signal due to their good biological activity, excellent electrical conductivity and high specific surface area. Gold and silver core-shell nanoparticles ( [email protected] ) could act as effective catalyzer to accelerate H 2 O 2 decomposition to produce various intermediate reactive oxygen species for signal amplification and thus increased the ECL signal again. Under optimal conditions, the proposed ECL aptasensor obtained an extremely low detection limit of 5.32 fg/mL (S/N = 3) with a good detection range from 100 fg/mL to 1 μg/mL. Moreover, the proposed aptasensor had excellent specificity, outstanding repeatability and favorable stability. Finally, the proposed ECL aptasensor was used for the detection of profenofos in real samples and the recoveries ranged from 94% to 102%. This strategy could provide a good reference for developing effective aptasensors for detection of other small molecules and toxins.
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 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）