CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhixin Ye,Feifei Zhong,Yunfei Chen,Zhimin Zou,Chunhai Jiang
Composite anode materials with a unique architecture of carbon nanotubes (CNTs)-chained spinel lithium titanate (Li 4 Ti 5 O 12 , LTO) nanoparticles are prepared for lithium ion capacitors (LICs). The CNTs networks derived from commercial conductive slurry not only bring out a steric hindrance effect to restrict the growth of Li 4 Ti 5 O 12 particles but greatly enhance the electronic conductivity of the CNTs/LTO composites, both have contributed to the excellent rate capability and cycle stability. The capacity retention at 30 C (1 C = 175 mA g −1 ) is as high as 89.7% of that at 0.2 C with a CNTs content of 11 wt%. Meanwhile, there is not any capacity degradation after 500 cycles at 5 C. The LIC assembled with activated carbon (AC) cathode and such a CNTs/LTO composite anode displays excellent energy storage properties, including a high energy density of 35 Wh kg −1 at 7434 W kg −1 , and a high capacity retention of 87.8% after 2200 cycles at 1 A g −1 . These electrochemical performances outperform the reported data achieved on other LTO anode-based LICs. Considering the facile and scalable preparation process proposed herein, the CNTs/LTO composites can be very potential anode materials for hybrid capacitors towards high power-energy outputs.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 11
·110539
·
IF 4.386
Wen Xie,Wenxian Yang,Ping Xie,Wenjiang Xie
Polyaniline (PANI) has good electrical conductivity, diverse redox chemistry, and a unique doping/dedoping mechanism. Furthermore, the facile synthesis, controllable morphology, and the ability to grow in situ on substrates provide the impetus to obtain aqueous Zn-ion batteries (ZIBs) with PANI as a cathode. However, due to its poor redox reversibility in a near-neutral electrolyte environment, the resulting ZIBs have a rapid capacity drop, poor rate performance, and poor cycling stability. To improve the electrochemical performance of PANI cathodes in ZIBs, zinc ions are doped into PANI and incorporated with carbon nanotubes (CNTs) by one-step polymerization. The results show that the use of Zn-doped PANI and CNTs composites can enhance the conductivity and stability of PANI, and further improve the capacities, rate performances, and cycle life of the ZIBs. The battery assembled with an optimized PANI-based cathode exhibits a high specific discharge capacity of 156.7 mAh g−1 at 0.05 Ag−1, and excellent capacity retention of 95% after 800 charge/discharge cycles. Additionally, the Zn//PANI battery shows a promising energy density of 166.7 Wh kg−1, together with a power density of 111.2 W kg−1. Such Zn ion-doped PANI-CNTs cathode material may provide significant insight into future large-scale industrial production for Zn//PANI batteries.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Teng Zhou,Kunlan Diao,Daohai Zhang,Yupeng Hu,Jiajia Du,Zhi Lei,Dongju Liu,Kaixiang Zou,Shuhao Qin
Carbon nanotubes (CNTs) are widely used as conductive fillers because of their lightweight and easy modification. However, their poor dispersion in solvents limits their otherwise excellent performance. The anionic surfactant sodium dodecylbenzene sulfonate (SDBS) and (3-aminopropyl) triethoxysilane (KH550) were used as modifiers to inhibit the agglomeration of multi-walled CNTs. A high toughness, strong electromagnetic shielding (EMI) hydrogel was prepared by blending polyvinyl alcohol (PVA) and polyacrylic acid (PAA) hydrogel. Addition of a modifier promoted the uniform dispersion of multi-walled CNTs, but also improved the mechanical properties of the hydrogels. An elongation at break (233.9%) and compressive strength (≈2.89 MPa) of PVA/PAA/K-CNTs hydrogel with 0.5 wt% K-CNTs, 8 wt% PVA and 2 wt% PAA were noted. More encouragingly, the total electromagnetic shielding effectiveness was 28.89 dB at just 1-mm thickness. This work provides a general approach for CNT functionalization that may be of great interest to industry.
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DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2020
·Vol. 147
·期 1
·169-180
·
IF 2.731
Wang Liang,Wu Wei,Drummer Dietmar
In this context, carbon nanotubes (CNTs)/silver nanoparticles hybrids with special 1-dimensional–0-dimensional (1D–0D) structure were successfully fabricated via self-assemble of dopamine followed by reduction reactions of silver cations aiming to synthesize more efficient thermal conductive fillers for the formation of heat flow transfer network in PA6 matrix. FTIR, XRD, TG and TEM revealed the characteristics of functionalized CNTs. Meanwhile, the effect of CNTs hybrids with 1D–0D structure on the construction of heat flow network and thermal conductivity was also investigated. Experimental results showed that thermal conductivity of composites enhanced with increased filler content, the highest thermal conductivity of the PA6/CNTs hybrids composites reached 0.65 W m −1 K −1 , which was 2.1 times that of pure PA6 and 32% higher than that of pristine CNTs-filled composites (0.55 W m −1 K −1 ) with same filler content (10 vol%), and this was ascribed to the better dispersion of fillers and enhanced interfacial interaction between fillers and matrix, as well as the special structure of CNTs hybrids that could abundance the heat transfer path. The crystallinities and dynamic thermal mechanical properties were also analyzed. The enhanced storage modulus (1940 MPa for pure PA6 to 3650 MPa for PA6/CNTs hybrids composites at 5 °C) and higher glass transition temperature along with the change of crystallization behavior of fabricated composites were in accordance with the thermal conductive behavior. The thermal conductive model and its mechanism were then proposed and further confirmed by scanning electron microscopy.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 9
·2306-2313
·
IF 5.106
Meng-Han Wang,Ze Ma,Huai-Guo Xue,Sheng-Ping Guo
Polyanion-type cathode materials for lithium ion batteries have attracted much attention recently in view of their stable structures. Here, relatively rarely investigated LiFeTiO4 and its composite with carbon nanotubes (CNTs) have been synthesized via solid-state reactions. Their structures, chemical compositions and morphologies are characterized using various techniques. As a cathode material, LiFeTiO4/CNTs can deliver a highest first discharge capacity of 465.7 mA h g−1 and there is still 202.4 mA h g−1 remaining after 100 cycles at 0.1C. The rate capabilities of LiFeTiO4/CNTs are also studied. The promising electrochemical performance of LiFeTiO4/CNTs is well analyzed and discussed.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 7
·2316
·
IF 3.5
Jianjun Ding,Niansong Liu,Ganglin Wang,Naiyu Guo,Chao Sun
In response to the shortcomings of traditional surface-enhanced Raman spectroscopy (SERS) substrates, such as short shelf life, poor uniformity, and low selectivity, this study innovatively proposed a three-dimensional composite substrate of CNTs/Ag/AgNWs/SiO 2 . This substrate demonstrates excellent SERS enhancement effects, with a detection limit of 10 −12 mol/L for the probe molecule Rhodamine 6G (R6G) and an enhancement factor (EF) of 8.947 × 10 8 . Further experiments confirmed the substrate’s superior uniformity and stability. The enhancement mechanism was investigated using both experimental methods and the Finite Difference Time Domain (FDTD) approach. When commonly used pesticide thiram was used as the target analyte, the detection limit of the substrate reached 0.1 mg/L, which is significantly lower than the pesticide residue standards of China and the European Union. Additionally, the genetic algorithm (GA)-optimized Back Propagation (BP) neural network was introduced for the quantitative analysis of thiram concentrations. The experimental results indicated that the GA-BP algorithm achieved the training prediction accuracy of 92.5% for thiram, demonstrating good network performance. This method shows good selectivity and has broad application prospects in the detection of toxic chemicals, environmental pollutants, and food additives.
研究领域:
分析化学
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纳米材料
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环境监测
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食品安全
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传感器与生物传感器
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产品关联
DOI
PubMed
高影响因子
IONICS
·
2024
·
IF 2.4
Yang Qipeng,Fan Yiqing,Zhou Hao,Zhang He,Tan Weiqiang
Covalent organic framework materials (COFs) are a new class of crystalline porous polymers with high porosity, robust frame structure, and uniform dispersion atoms, but lower conductivity normally. Given this, we in situ prepared a cobalt-porphyrin-based COF modified with CNTs via Schiff base condensation reaction for the oxygen evolution reaction, without a high-temperature pyrolysis process . The electrocatalysts exhibit outstanding oxygen evolution reaction activity because of the uniform distribution of active centers and the synergistic effects between Co-COF and CNTs. The results show that Co-COF/3 mg CNT electrocatalyst exhibits an overpotential of 376 mV and a low Tafel slope of 61 mV dec −1 at a current density of 10 mA cm −2 in the alkaline solution with pH = 13.6. Moreover, the chronopotentiometry measurements manifest that the as-prepared electrocatalysts are superior superiorly stable during the long-term OER process, retaining 93% of their initial current density after 7 h of continuous measurement. Thus, this work proposes a convenient method for fabricating effective OER electrocatalysts directly using COF-based material in energy conversion.
研究领域:
材料科学
·
能源化学
·
催化化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 37
·16546-16556
·
IF 2.7
Xiubin Ren,Chun Huang,Zhengxuan Gao,Ruichen Zhai,Youyu Zhu,Yingfeng Duan,Linyong Chen,Weiqin Zhao,Guofu Li
The presence of phenol in coal-chemical engineering wastewater is considered a serious environmental issue. The use of enzymes to degrade phenol has received wide attention. G-quadruplex can combine with hemin to form G-quadruplex/hemin, which shows peroxidase-like activity and can be used to degrade phenol. In this work, a novel CNTs-NH2@G-quadruplex/hemin was designed using a single-stranded DNA (ssDNA) that contained G-rich fragments and T-rich fragments. The G-rich fragments assembled with the hemin to form G-quadruplex/hemin; the pyrimidine group of the T-rich fragment could form stable chemical bonds with the amino group, which could be used for immobilization. Characterization analysis of FTIR, XRD and TEM showed that the CNTs-NH2@G-quadruplex/hemin was successfully prepared. Meanwhile, the activity and phenol degradation ability for CNTs-NH2@G-quadruplex/hemin were studied in detail, and the effects of pH, temperature, initial phenol concentration, H2O2 concentration and reusability on the degradation efficiency of phenol were also explored. The results showed that when immobilized, the CNTs-NH2@G-quadruplex/hemin presented good activity, especially under conditions of temperature 30 °C and pH 7.0. Notably, the maximum reaction velocity of CNTs-NH2@G-quadruplex/hemin was increased from 0.016 mM mg−1 min−1 (free enzyme) to 0.056 mM mg−1 min−1. For phenol degradation ability, it was observed that under the conditions of temperature 30 °C, pH 7.0, initial phenol concentration 40 mg L−1, H2O2 concentration 120 mM, enzyme dose 40 mg L−1, more than 90% of phenol could be degraded within 600 min. In addition, the CNTs-NH2@G-quadruplex/hemin still maintained high activity after 10 cycles of phenol removal, demonstrating its appealing potential for practical applications.
研究领域:
环境科学
·
生物化学
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产品关联
DOI
高影响因子
IONICS
·
2026
·
IF 3.4
Zhao Mingjie,Wen Weidong,Lu Bingxu,Zhang Junpu,Wang Huanwen,Gong Yansheng,Jin Jun,Liu Yanqi,Wang Rui
VPO 5 is another anode material with a relatively high lithium intercalation/deintercalation potential plateau, which is less prone to lithium dendrite formation during cycling and boasts superior safety performance. However, its low Coulombic efficiency and poor electrical conductivity restrict the enhancement of its overall electrochemical performance. In this research, carbon nanotubes are introduced to modify the VPO 5 anode via a simple and scalable ball-milling method. Results show that the composite material presents an enhanced conductivity and specific surface area, thus improves the electrochemical performance. The optimized material retains a capacity retention rate of 93.3% after 350 cycles and delivers a specific capacity of 241.2 mAh g − 1 at a rate of 10 C, which represents a significant improvement compared with the unmodified pristine VPO 5 . This study proposes a feasible strategy for modifying metal phosphate anode materials, and further provides guidance for the development of next-generation batteries with high specific energy and safety.
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产品关联
DOI
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 13
·e05110
·
IF 2.3
Jiyang Zuo,Jiheng Ding,Hao Wang,Hao Rong,Xu Zhang,Xin Fan,Kai Xie,Yuna Zhang,Qi Yang,Zhisen Shen,Xiaoqing Liu
Chronic wound management requires multifunctional biomaterials integrating antibacterial and tissue-repair capacities. To address this clinical demand, we developed a composite hydrogel by incorporating quercetin-loaded TiO 2 @CNTs heterojunctions into chitosan, leveraging their complementary properties: chitosan's excellent biocompatibility as the matrix, quercetin's natural anti-inflammatory effects, TiO 2 ’s photocatalytic antibacterial activity, and CNTs’ structural reinforcement. The TiO 2 @CNTs heterojunction was synthesized hydrothermally, with characterization confirming uniform TiO 2 dispersion on CNTs, anatase-phase crystallinity, and robust interfacial bonding. The composite hydrogel showed thermoresponsive gelation at 37 °C, favorable porcine skin adhesion, and a porous microstructure. In vitro tests revealed >90% L929 fibroblast viability (25 µM quercetin optimal), enhanced cell migration, and hemolysis rates <5%. Antibacterial assays against Escherichia coli demonstrated significantly larger inhibition zones (18.2 ± 1.3 mm) and lower bacterial counts for the composite hydrogel than those for the chitosan-only or control groups. In a rat skin wound model, the hydrogel achieved 60% wound closure at 7 days, outperforming the chitosan (50%) and control (40%) groups. Furthermore, histological and blood biochemical analyses confirmed no systemic toxicity, organ damage, or TiO 2 /CNT accumulation in major organs. This multifunctional hydrogel exhibits synergistic antibacterial, biocompatible, and pro-healing properties, making it a promising candidate for advanced chronic wound care applications.
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产品关联
DOI
高影响因子
IONICS
·
2026
·
IF 3.4
Zhang Wei,Lan Yunfei,Zheng Xueliang,Zhang Yu,Shen Wei
Short-duration and repetitive power fluctuations associated with train acceleration, braking, and regenerative-energy recovery require energy-storage devices with rapid response, high-rate capability, and stable cycling. Here, a CoS 2 /Nd 2 O 3 composite positive electrode prepared at a confirmed Co/Nd molar feed ratio of 2:1 and a sulfur-treated carbon-nanotube (S-CNT) negative electrode were combined in an aqueous asymmetric supercapacitor. The composite exhibited a predominantly mesoporous architecture with a Brunauer–Emmett–Teller surface area of 213.21 m 2 g −1 , while the S-CNTs retained a continuous one-dimensional conductive network and sulfur-related surface species. The CoS 2 /Nd 2 O 3 electrode delivered 1961 F g −1 at 1 A g −1 and retained 1401 F g −1 at 20 A g −1 , with 87.6% capacitance retention after 10,000 cycles. The S-CNT electrode delivered 431 F g −1 at 1 A g −1 , 28.7% above untreated CNTs under the same conditions, and retained 81.0% at 20 A g −1 . The two-electrode device retained 73.3% of its 1 A g −1 capacitance at 15 A g −1 and approximately 95.0% after 10,000 cycles. A retrospective first-order charge-balance analysis indicates that further optimization of the electrode mass ratio would be beneficial. These results support the tested material pair as a laboratory-scale platform for short-duration power buffering, while composition optimization, complete-device impedance characterization, and application-specific pulse validation would further strengthen its assessment for rail-transit applications.
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DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Yanzhou Tang,Guoqiang Zhong,Jun Zhang,Ruifeng Song,Hongbo Lv,Kaiwen Chen,Hongdan Wang,Rengui Weng,Xusheng Wang,Zhang Yan,Weiguang Li,Zhuwu Jiang,Chang He
Covalent organic frameworks (COFs) are attractive electrode candidates for capacitive deionization (CDI), but their practical use is often restricted by sluggish electron transport and the limited accessibility of redox-active units. In this work, electroactive β -ketoenamine COF domains were covalently integrated with amino-functionalized carbon nanotubes (CNTs), producing a conductive core–shell hybrid with intimate interfacial coupling. Benefiting from the thin COF shell, the conductive CNT backbone, and the chemically anchored interface, the optimized electrode achieves a salt adsorption capacity of 87.38 mg g −1 and maintains stable regeneration behavior, outperforming the pristine COF and CNT controls. Electrochemical measurements and density functional theory (DFT) calculations indicate that the covalent COF/CNT junction redistributes interfacial charge, improves electronic communication, and decreases the barrier for Na + migration. These results highlight covalent interfacial integration as an efficient route for activating redox COFs and developing high-performance metal-free CDI electrodes. Download: Download high-res image (372KB) Download: Download full-size image
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高影响因子
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