Nano Energy
·
2022
·
IF 19.069
Lin Zhang,Hongjing Shang,Daxing Huang,Bowei Xie,Qi Zou,Zhaoshun Gao,Jiangli Xue,Hongwei Gu,Fazhu Ding
Due to the limited thermoelectric performance of polymers and intrinsic rigidness of inorganic materials, it is difficult to obtain n-type thermoelectric materials and devices with low-cost, excellent flexibility, and high performance. In this work, we have successfully synthesized n-type flexible free-standing thermoelectric films by a low-cost solvothermal method, which is composed of Bi 2 Se 3 nanosheets and single-wall carbon nanotubes (SWCNTs). Bi 2 Se 3 nanosheets with excellent crystallinity and rhombohedral morphology were grown on SWCNTs. The optimized Bi 2 Se 3 /SWCNTs composite films exhibited a high electrical conductivity of 292.7 S cm −1 and a Seebeck coefficient of − 42.4 μV K −1 at room temperature, eventually achieving an improved power factor of 52.7 μW m −1 K −2 . Furthermore, the composite films exhibited excellent flexibility due to the interweaving of Bi 2 Se 3 nanosheets with SWCNTs, where the thermoelectric performance remained almost unchanged after 5000 bending cycles around a 3.5 mm radius rod . A thermoelectric device, composed of the optimized films, was constructed to further show the practicality, which generated a voltage and a power density of 11.5 mV and 86.2 μW cm −2 at a temperature gradient of 58 K, respectively. This work can provide support for the preparation of other n-type free-standing thermoelectric films with both high thermoelectric performance and excellent flexibility.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Pengcheng Zhao,Linzi Huang,Hui Wang,Chenxi Wang,Jia Chen,Pingping Yang,Meijun Ni,Chao Chen,Chunyan Li,Yixi Xie,Junjie Fei
Baicalin (Bn) obtained from natural plants has been found to exhibit significant antiviral activity against Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). Herein, a novel ultrasensitive Bn electrochemical sensor was proposed based on graphitized carbon-nitride - single-walled carbon nanotube nanocomposites (C 3 N 4 -SWCNTs), reduced graphene oxide (rGO) and electrodeposited cyclodextrin-metal organic framework (CD-MOF). The sensing nanomaterials were characterized by X-ray diffraction spectroscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. Under optimal conditions, the sensor exhibited sensitive detection of Bn in a wide linear range of 1 × 10 -9 –5 × 10 -7 M with an LOD of 4.6 × 10 -10 M and a sensitivity of 220 A/M, and it showed satisfactory stability and accuracy for detecting Bn in real samples (human serum and bear bile scutellaria eye drops). In addition, the electrochemical reaction sites and redox mechanism of Bn were revealed through electrochemical behavior and density functional theory. This work provided an insightful solution for detecting Bn, and extensive potential applications could be further expected.
研究领域:
药物分析
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电化学传感
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-8
·
IF 16.6
Peng Weichao,Yan Shuaihu,Zhou Ke,Wu Hai-Chen,Liu Lei,Zhao Yuliang
The hollow and tubular structure of single-walled carbon nanotubes (SWCNTs) makes them ideal candidates for making nanopores. However, the heterogeneity of SWCNTs hinders the fabrication of robust and reproducible carbon-based nanopore sensors. Here we develop a modified density gradient ultracentrifugation approach to separate ultrashort (≈5-10 nm) SWCNTs with a narrow conductance range and construct high-resolution nanopore sensors with those tubes inserted in lipid bilayers. By conducting ionic current recordings and fluorescent imaging of Ca 2+ flux through different nanopores, we prove that the ion mobilities in SWCNT nanopores are 3-5 times higher than the bulk mobility. Furthermore, we employ SWCNT nanopores to discriminate homologue or isomeric proteinogenic amino acids, which are challenging tasks for other nanopore sensors. These successes, coupled with the building of SWCNT nanopore arrays, may constitute a crucial part of the recently burgeoning protein sequencing technologies.
研究领域:
纳米技术
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生物化学
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分子生物学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Bao-Hui Shao,Tong-Yu Li,Wen-Yi Sun,Ke Hu,Chun-Hao Chang,Xin-Yi Luo,Qing-Xin Meng,Wen-Hao Geng,Di Zhang,Hong-Zhang Geng
Recent industrial advancements have accelerated the development of thermoelectric devices for waste heat recovery and energy conversion. The fabrication of both n-type and p-type thermoelectric materials from the same substance has attracted broad research interest. In this study, p-type and n-type thermoelectric films were prepared using single-walled carbon nanotubes (SWCNTs) and Cu 2 O, with only minor differences in processing and composition. The two types of films exhibited distinct properties, which correlated with different crystal morphologies of Cu₂O: a rice-like microstructure in the p-type material and spherical microstructure in the n-type material. After p-type doping with Cu 2 O, the optimal Seebeck coefficient increased from 16 μV·K −1 to 41.2 μV·K −1 , while the electrical conductivity decreased from 67,891 S·m −1 to 2338.5 S·m −1 . The p-type SWCNT/Cu 2 O film achieved a maximum ZT value of 0.018, approximately 60 times higher than that of pure SWCNTs. For the n-type doped film, the Seebeck coefficient changed from 16 μV·K −1 to −17.6 μV·K −1 , and the electrical conductivity decreased to 27,828.5 S·m −1 , yielding a maximum ZT of 0.012—about 40 times higher than pure SWCNTs. A device consisting of six pairs of p-type and n-type films generated a voltage of up to 34.56 mV at a temperature difference of 100 K, demonstrating excellent thermoelectric performance. Both composite films also showed outstanding electrothermal properties: the p-type film reached 295 °C at 7 V with stable heating at 6 V, while the n-type film reached 335 °C at 6 V and exhibited good stability at 3.5 V. This work offers a simple and effective strategy for designing high-performance p-type and n-type thermoelectric materials from the same base system.
研究领域:
材料科学
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凝聚态物理
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纳米科技
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能源材料
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热电转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 11
·6821-6830
·
IF 4.036
Jinling Gao,Mingzhe Song,Tongtong Li,Yuyao Zhao,Anxu Wang
Nanocomposites play a key role in the removal of toxic metal(loid)s from environmental water. In this study, we investigated the adsorption capability of water-soluble carboxymethyl chitosan (WSCC)-modified functionally oxidized single walled carbon nanotubes (oSWCNTs) for rapid and efficient removal of toxic Pb(II) from water. The WSCC–oSWCNTs nanocomposite was prepared by an acid treatment of SWCNTs followed by an ultrasonic dispersion process using WSCC as dispersant. The morphology and chemical characteristics of the WSCC–oSWCNTs nanocomposite were further identified using various characterization techniques (i.e., transmission electron microscopy, TEM; scanning electron microscopy, SEM; Raman spectra; Fourier transform infrared spectroscopy, FTIR; X-ray photoelectron spectroscopy, XPS; nitrogen adsorption–desorption isotherm test). The efficiency of the adsorption process in batch experiments was investigated via determining various factor effects (i.e. WSCC–oSWCNTs nanocomposite concentration, solution pH, initial Pb(II) concentration, contact time, and reaction temperature). Kinetic results showed that the adsorption process followed a pseudo-second-order, while an isotherm results study showed that the adsorption process followed the Langmuir and Freundlich isotherm models at the same time. In addition, the van't Hoff equation was used to calculate thermodynamic parameters for assessing the endothermic properties and spontaneity of the adsorption process. The WSCC–oSWCNTs nanocomposite manifested a high adsorption capacity for Pb(II) (113.63 mg g−1) via electrostatic interactions and ion-exchange, as its adsorption rate could reach up to 98.72%. This study, therefore, provides a novel adsorbent for the removal and detection of harmful residues (i.e. toxic metal(loid)s) from environmental water, such as industry wastewater treatment and chemical waste management.
研究领域:
环境科学
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纳米技术
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水处理
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环境化学
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材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
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2021
·
IF 6.617
Jueshuo Fan,Xuan Huang,Fusheng Liu,Liang Deng,Guamgming Chen
Despite the significant progress in thermoelectric composites in recent years, composite systems completely composed of one-dimensional (1D) and two-dimensional (2D) nanostructures are rarely reported. In this study, the thermoelectric composites are prepared using 2D nanobelts of SnSe, obtained by a chemically exfoliation process (solvothermal lithium-intercalation and subsequent exfoliation), and 1D single-walled carbon nanotubes (SWCNTs) via a facile solution mixing and subsequent vacuum filtration method. The thermoelectric performance of the SnSe nanobelt/SWCNT composite films are further improved by post-treatment of thermal annealing. An optimized power factor at room temperature of 145 ± 28 μW m −1 K −2 for the composite film with 80 wt% SWCNTs has been realized, which is much higher than that of either component. The results inspire a new insight into the SnSe-related thermoelectric composites, laying a foundation for the fabrication of high-performance thermoelectric composites in the future.
研究领域:
材料科学
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纳米技术
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2012
·Vol. 42
·期 10
·3402-3409
·
IF 3.838
Bo Chai,Tianyou Peng,Xiaohu Zhang,Jing Mao,Kan Li,Xungao Zhang
A novel nanostructured carbon/TiO2 nanocomposite photocatalyst is firstly fabricated via a facile hydrothermal process by using fullerene (C60) decorated single-walled carbon nanotubes (SWCNTs) as carbon source, which is denoted as C60-d-CNTs. The obtained nanostructured carbon/TiO2 nanocomposites are characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectra (DRS), Raman spectra, X-ray photoelectron spectroscopy (XPS) and photoluminescence spectra (PL), and then are used as catalysts for photocatalytic hydrogen production. It is found that the kinds and contents of various carbon nanostructured materials (such as SWCNTs, C60 and C60-d-CNTs) coupled with TiO2 can significantly enhance the photoactivity for hydrogen production, and the 5 wt% C60-d-CNTs/TiO2 nanocomposite exhibits the best performance. Experimental results suggest that the C60-d-CNTs as a novel carbon nanostructured material could be more beneficial for the photogenerated carrier separation than SWCNTs and C60 when these carbon nanostructured materials are coupled with TiO2.
研究领域:
材料科学
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纳米技术
·
光催化
·
氢能
✓ 已验证
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 21
·5309-5320
·
IF 4.157
Zhou Kunfeng,Han Hong,Sha Jingquan,Luan Shaozheng,Diao Yan,Dong Chunyao,Yang Jinghua
Although many satisfactory studies have been developed for biomolecule detection, the complexity of biofluids still poses a major challenge to improve the performance of nanomaterials as electrochemical sensors. Herein, unprecedented polyoxometalate-based metal-organic frameworks (POMOFs) with 8-fold meso-helical feature, [Ag 5 (trz) 4 ] 2 [PMo 12 O 40 ] (PAZ), were synthesized and explored as electrochemical sensors to detect dopamine (DA). To improve the conductivity of PAZ and the binding ability with single-walled carbon nanotubes (SWCNTs), the nanocomposite of carboxyl functionalized SWCNTs (SWCNTs-COOH) with nano-PAZ (NPAZ), NPAZ@SWCNTs-COOH, was fabricated, and transmission electron microscopy (TEM) shows that NPAZ can interact stably and uniformly with SWCNTs-COOH, owing to more defect sites on the surface of SWCNTs-COOH. The electrochemical result of NPAZ@SWCNTs-COOH/GCE towards detecting DA shows that the linear range was from 0.05 to 100 μM with a detection limit (LOD) of 8.6 nM (S/N = 3). Graphical abstract
A new electrochemical biosensing platform by combining 8-fold helical POMOFs with SWCNTs-COOH was developed for enhancing detection of dopamine for the first time, exhibiting the lowest detection limit to date.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Yongling Du,Xin Gao,Xiaoliang Ye,Zhixiang Zheng,Qingliang Feng,Chunming Wang,Kaifeng Wu
The Au–SnO 2 /graphenes (GNs)-single-walled carbon nanotubes (SWCNTs) nanocomposite has been prepared through green chemistry methods. This composite material was deliberately designed to combine the virtues of metal, semiconductor, and carbon materials. Its successful formation has been confirmed by a series of characterizations, such as transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). A new electrode based on this nanocomposite was fabricated and used as a voltammetric sensor for detection of 2-tert-butylhydroquinone (TBHQ) through cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. Under optimized conditions, this electrode presents a linear response in a broad concentration range of 5.0 × 10 −8 to 2.3 × 10 −4 M of TBHQ, with its detection limit reaching 5.8 × 10 −8 M. This simultaneous broad-range and ultrasensitive detecting capability for TBHQ is, to our best knowledge, better than all the previously reported modified electrodes. The excellent performance is attributed to the synergistic effects among the constituent nanomaterials (GNs, SWCNTs, SnO 2 , and Au) and the unique nano-architecture of this nanocomposite.
研究领域:
材料科学
·
食品科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2015
·
IF 3.545
Wenjing Wang,Lu Wang,Lina Zou,Gaiping Li,Baoxian Ye
A novel voltammetric sensor was constructed by simple dripping single-walled carbon nanotubes (SWCNTs) on to the glass carbon electrode (GCE) firstly and electro-polymerizing l -Citrulline film subsequently. The resulting poly( l -Citrulline)/SWCNTs/GCE showed a significant voltammetric response to picroside II due to the synergistic effect of SWCNTs and poly( l -Citrulline) film. The first electroanalytical method of picroside II was proposed with detection linear range from 8.0×10 −8 to 5.0×10 −6 mol L −1 and a detection limit of 3×10 −8 mol L −1 .The high sensitivity, selectivity and long-term stability made the sensor suitable for the determination of picroside II. Moreover, based on the systematically investigation and some kinetics parameters calculated in the experimentation, the reaction mechanism of picroside II at the poly( l -Citrulline)/SWCNTs modified GCE was obtained reliably. Lastly, the proposed sensor was used for the determination of picroside II in real sample with satisfactory results. This work promoted the potential applications of amino acid materials and SWCNTs in electro-chemical sensors.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2013
·
IF 2.672
Yuanyuan Yao,Long Zhang,Jingkun Xu,Xiaoqiang Wang,Xuemin Duan,Yangping Wen
A rapid, sensitive and enzymeless methyl parathion (MP) electrochemical sensor based on carboxylic acid-functionalized single-walled carbon nanotubes–β-cyclodextrin modified glassy carbon electrode (ƒ-SWCNT–β-CD/GCE) was successfully constructed for the trace analysis of MP in vegetable samples. Cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy were utilized to characterize the properties of the modified electrode. Experimental parameters such as preconcentration time, pH value, and the concentration of ƒ-SWCNT and β-CD were optimized. The proposed electrode displayed excellent electrocatalytic activity towards MP. The calibration curve for MP was obtained in both ranges of 0.002–0.02 μg mL −1 and 0.02–17.5 μg mL −1 , with a low detection limit ( S/N = 3) of 0.4 ng mL −1 after a very short preconcentration time for 80 s. The modified electrode exhibited fast current response, high sensitivity, good reproducibility, and satisfactory anti-interference ability, and also successfully employed for the trace analysis of MP in vegetables samples. Satisfactory results revealed that this proposed electrochemical sensor can provide a promising candidate for the trace analysis of MP in agricultural and environmental samples.
研究领域:
分析化学
·
环境科学
·
农业科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiangyu Yang,Fucheng Guo,Tao Liu,Qiang He,Jan Vymazal,Yi Chen
Ammonia-oxidizing microorganisms (AOMs, archaea (AOA) and bacteria (AOB)) are primarily responsible for the ammoxidation in constructed wetlands (CWs). However, little is known about evaluating the response of AOA and AOB to engineered nanomaterials (ENMs) and quantifying the shift of their contribution to ammoxidation. Herein, we operated a series of CWs exposing to silver nanoparticles (Ag-NPs), single-walled carbon nanotubes (SWCNTs), and polystyrene nano-sized plastics (PS-NPs) with the wastewater-accumulating concentration of ENMs for 180 days. The results showed that the abundance of AOA amo A gene in situ was far lower than that of AOB, while the abundance ratio of AOA to AOB increased by 15 folds after 180-day experiment. Using DNA stable isotope probing (DNA-SIP) experiment, we found that the active AOB microbiota varied substantially but the AOA was more stable across different groups. Furthermore, the co-occurrence analysis proved that ENMs stress increased the negative coexistence pattern of AOA and AOB; predictive functional profiling showed that the ENMs enhanced the functional advantage of AOA by inhibiting AOB (mainly hydroxylamine oxidation process). Finally, the contribution of AOA increased under exposing to SWCNTs (18.35%), PS-NPs (24.92%), and Ag-NPs (32.14%) compared with control group (0.03%) for 180 days. Despite this, AOB was still the primary executant of ammoxidation in CWs. Overall, in our study, the differences in activities and contributions of AOMs were quantified in CWs, and a significantly negative coexistence relationship between AOA and AOB was revealed when exposed to emerging nanomaterials.
研究领域:
环境微生物学
·
生态毒理学
·
废水处理
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）