CARBON
·
2022
·
IF 11.307
Jing Chen,Ying Chen,Shuying Li,Jiao Yang,Jianbin Dong,Xiaoquan Lu
Tyrosine is the precursor of some neurotransmitters such as thyroxine and dopamine. It has the effect of regulating emotions and stimulating the nervous system. Changes in tyrosine levels in the human body are associated with certain diseases. Therefore, it is very necessary to prepare a new type of tyrosine sensor. In this work, an enzyme-free electrochemical sensor based on MXene/CNTs/CuMOF composite was developed for the detection of tyrosine. Embedding carbon nanotubes (CNTs) into MXene effectively prevented the aggregation of MXene sheets. Further modification of MXene/CNTs materials with CuMOF octahedral particles with porous structure can improve the porosity and catalytic capability of the composites. Under the optimal detection conditions, the prepared sensor has good linearity in the detection of tyrosine within range 0.53 μM–232.46 μM with a limit of detection (LOD) of 0.19 μM. The stability and selectivity of the sensor is high, and can be used to detect tyrosine in human serum.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2019
·Vol. 11
·期 1
·1-12
·
IF 9.043
Wang Siliang,Wang Qiang,Zeng Wei,Wang Min,Ruan Limin,Ma Yanan
Restricted by their energy storage mechanism, current energy storage devices have certain drawbacks, such as low power density for batteries and low energy density for supercapacitors. Fortunately, the nearest ion capacitors, such as lithium-ion and sodium-ion capacitors containing battery-type and capacitor-type electrodes, may allow achieving both high energy and power densities. For the inspiration, a new zinc-ion capacitor (ZIC) has been designed and realized by assembling the free-standing manganese dioxide–carbon nanotubes (MnO 2 –CNTs) battery-type cathode and MXene (Ti 3 C 2 T x ) capacitor-type anode in an aqueous electrolyte. The ZIC can avoid the insecurity issues that frequently occurred in lithium-ion and sodium-ion capacitors in organic electrolytes. As expected, the ZIC in an aqueous liquid electrolyte exhibits excellent electrochemical performance (based on the total weight of cathode and anode), such as a high specific capacitance of 115.1 F g −1 (1 mV s −1 ), high energy density of 98.6 Wh kg −1 (77.5 W kg −1 ), high power density of 2480.6 W kg −1 (29.7 Wh kg −1 ), and high capacitance retention of ~ 83.6% of its initial capacitance (15,000 cycles). Even in an aqueous gel electrolyte, the ZIC also exhibits excellent performance. This work provides an essential strategy for designing next-generation high-performance energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Meng Ma,Qi Zheng,Xinci Zhang,Lin Li,Maosheng Cao
Electromagnetic radiation pollution has become a serious threat, which will harm human health and interfere with electronic devices. However, it is still a challenge to develop high-efficiency electromagnetic wave absorbers with wide frequency band and strong absorption, especially for realizing the features of multi-bands absorption. Herein, VSe 2 /CNTs nanocomposites were successfully synthesized with crosslinked CNTs distributed on VSe 2 nanoclusters composed of nanosheets . Importantly, the electromagnetic properties and absorption performance of the VSe 2 /CNTs nanocomposites can be effectively tailored by changing the hybrid ratio of CNTs and VSe 2 nanosheets (VSe 2 -NSs). The increase of CNTs content promotes the formation of a conductive network and leads to the increase of permittivity. The VSe 2 /CNTs nanocomposite with CNTs of 40 mg exhibits the best electromagnetic wave absorption performance, the minimum reflection loss ( RL ) reaches −57.53 dB at 5.52 GHz and is about 6 times more than VSe 2 -NSs. Meanwhile, the VSe 2 /CNTs nanocomposite with CNTs of 30 mg shows dual-bands absorption performance with a minimum RL value of −50.06 dB at 3.84 GHz and the total effective absorption bandwidth of 3.32 GHz. This result proves that VSe 2 /CNTs nanocomposites can be promising candidates as high-efficiency electromagnetic wave absorption material and provides a feasible idea for designing a high-performance electromagnetic wave absorber.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2019
·
IF 4.914
Lin Tao,Chunzhi Li,Yiqi Ren,He Li,Jian Chen,Qihua Yang
ABSTRACT The development of heterogeneous catalytic processes is crucial for the synthesis of chiral compounds for both academic and industrial applications. However, thus far, such achievements have remained elusive. Herein, we report the heterogeneous asymmetric hydrogenation of 2-methylquinoline over solid chiral catalysts, which were prepared by the one-pot polymerization of (1 R ,2 R )- N -(4-vinyl-benzenesulfonyl)-1,2-diphenylethane-1,2-diamine (VDPEN) and divinylbenzene (DVB) in the presence or absence of activated carbon (C) or carbon nanotubes (CNTs), followed by Ru coordination and anion exchange. The solid chiral catalysts were fully characterized by N 2 sorption analysis, elemental analysis, TEM, FT-IR spectroscopy, and 13 C CP-MAS NMR. All the solid chiral catalysts could efficiently catalyze the asymmetric hydrogenation of 2-methylquinoline to afford 2-methyl-1,2,3,4-tetrahydroquinoline with 90% ee. Studies have shown that polymer/C and polymer/CNTs composites are more active than pure polymers. The polymer/CNTs composite exhibited the highest activity among all the solid chiral catalysts under identical conditions, owing to the unique morphology of CNTs. The recycling stabilities of the solid chiral catalysts were greatly improved when ionic liquids (ILs) were employed as solvents; this is mainly attributed to the decreased leaching amount of anions owing to the confinement effect of ILs on ionic compounds.
研究领域:
催化化学
·
材料科学
·
有机合成
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 17
·8083-8089
·
IF 3.3
Zhaofei Liu,Lili Zhang,Yuhang Wei,Zhiming Chen
Rapid and sensitive detection of hazardous compounds is of great importance for sensors. This work presents the immobilization of laccase on Fe3O4@MF-CNTs nanocomposites (Fe3O4@MF-CNTs-lac) for the fast and sensitive detection of catechol. Electrochemical impedance spectroscopy (EIS) results revealed that the combined effect of Fe3O4@MF and carbon nanotubes (CNTs) facilitates electron transfer between laccase and the electrode. Amperometric curves indicated that the Fe3O4@MF-CNTs-Lac biosensor can respond rapidly to a substrate and detect catechol within 0.5 s. The Fe3O4@MF-CNTs-Lac biosensor possesses a low detection limit of 0.84 μM (S/N = 3) with a linear range of 1–3000 μM, as well as high sensitivity, remarkable organic compound tolerance, and good selectivity, reproducibility and stability. The catechol biosensing assays revealed that Fe3O4@MF-CNTs-Lac can be operated in acidic water environments. Most importantly, the Fe3O4@MF-CNTs-Lac biosensor exhibited reliable results in real water sample analysis. The outstanding biosensing performances reveal that the Fe3O4@MF-CNTs-Lac biosensor has a technical application in the treatment of catechol to avoid catechol pollution.
研究领域:
环境科学
·
生物技术
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Kexin Chen,Jinming Liu,Ling Weng,Xiaorui Zhang,Lizhu Guan,Ruiqun Pan,Hang Xu,Xiaoming Wang,Houyu Wang,Xue Li
In this paper, the high thermal conductivity of BN m @EP/EP-CNTs composites prepared by the electrostatic direct-in-writing (DIW) 3D printing method was investigated. Octadecyltrimethylammonium bromide was used as a cationic surfactant to modify h-BN, improve filler dispersion and reduce interfacial thermal resistance. The macroscopic 3D heat transfer framework was constructed and the BN m @EP/EP-CNTs composites were prepared by the 3D printing method. 25 wt% of BN m and epoxy resin to prepare the printing adhesive, DIW 3D printing method to prepare the BN m @EP 3D thermally conductive skeleton, and vacuum impregnation of epoxy resin adhesive with different mass fractions of CNTs to obtain 3D BN m @EP/EP-CNTs composites. The heat conductivity of EP was 0.12 W/(m·K), the thermal conductivity of 3D-BN m @EP/EP-0 wt% CNTs at 0.748 W/(m·K), and 3D-BN m @EP/EP-2 wt% CNTs had a heat conduction coefficient of 1.22 W/(m·K). The heat transfer coefficient of 3D-BN m @EP/EP-0 wt% CNTs increased by 0.3% compared with that of BN m /EP prepared by simple blending at 25 wt%. 3D-BN m @EP/EP-2 wt% CNTs showed an increase of 916.7 % in thermal conductivity compared with that of EP; and the heat-resistance index was improved, with the glass transition temperature (GST) of 142.98 °C and the Tg of pure EP of 132.61 °C. Therefore, it can be concluded that the 3D printing method can clearly improve the heat conductivity of epoxy composites, and the 3D heat conducting network constructed macroscopically can likewise enhance the heat dissipation performance. It also has good electrical properties. In conclusion, this research can be better adapted to high-frequency signal transmission.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Mengting Jiang,Liwen He,Chao Duan,Xiaoping Ouyang
Poor fracture toughness is a major limitation of SiC ceramics, which greatly affects their application range. Herein, a novel strategy is proposed to enhance the fracture toughness of SiC ceramics by cross-linking carbon nanotubes (CNTs) coated with polydopamine (PDA) to Ti 3 C 2 modified with 3-glycidyloxypropyltrime-thoxysilane (KH560) (PDA-CNTs@f-Ti 3 C 2 ). Then, PDA-CNTs@f-Ti 3 C 2 was added to SiC powder to prepare the final composite. The influence of PDA-CNTs@f-Ti 3 C 2 addition on the microstructure and mechanical properties of the SiC composite is discussed. The results showed that, compared with CNTs and Ti 3 C 2 , the PDA-CNTs@f-Ti 3 C 2 composites exhibited better dispersibility in water. The flexural strength was significantly enhanced (~89%) in the SiC composite containing 3 wt% PDA-CNTs@f-Ti 3 C 2 , from 228.99 MPa to 433.55 MPa. The fracture toughness of the SiC composite containing 3 wt% PDA-CNTs@f-Ti 3 C 2 improved by 62%, from 3.97 MPa/m 1/2 to 6.44 MPa/m 1/2 .
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Yuelin Lv,Hui Zhao,Jieyun Zhang,Tong Gao,Qiang Zhuang,Jie Kong,Lixin Chen
Gel-based electromagnetic wave (EMW) absorbing materials demonstrate substantial potential in wearable electronics and soft robotics. However, it remains challenging to simultaneously achieve superior impedance matching and efficient electromagnetic energy dissipation through benefiting potential synergies among multifunctional attributes. In this work, a novel salting-out organohydrogel containing 0.5 wt.% NiFe 2 O 4 /CNTs was successfully synthesized, with a three-dimensional (3D) porous cross-linked structure and multiple heterointerfaces, which dramatically boosts the interfacial effects and improves the polarization loss. Meanwhile, dense polymer networks impose steric hindrance that elevates the energy barrier for molecular reorientation and ionic transport resistance, synergistically amplifying both polarization and ohmic conductive losses. Taking advantage of the features of considerable multiple polarization loss and optimized impedance matching, the as-prepared S-0.5 NiFe 2 O 4 /CNTs organohydrogel has achieved exceptional EMW absorption performance (the minimum reflection loss RL = −48.31 dB and the maximum adequate absorption bandwidth EAB reaches 6.16 GHz). This as-prepared organohydrogel exhibits optimal radar cross-section (RCS) reduction performance with a maximum value of 21.63 dB m 2 . Such excellent electromagnetic characteristics deepen the mechanistic understanding of internal attenuation processes in gel-based EMW absorbers and provide novel design principles for advancing next-generation flexible electronics.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Marimuthu Karpuraranjith,Yuanfu Chen,Xinqiang Wang,Bo Yu,Sivamoorthy Rajaboopathi,Dongxu Yang
It is still challengeable to develop low-cost metal-based photocatalysts with high efficiency and stability for organic pollutant degradation. Herein, we propose a novel “interfacial engineering and suitable band gap matching” strategy to synthesize hexagonal SnSe nanoplate supported SnO 2 -CNTs for highly efficient photocatalytic activity. The CNTs-SnO 2 /SnSe, constructed by SnO 2 nanoparticles homogeneously embedded in carbon nanotube surface, which is anchored on hexagonally crystalline SnSe nanoplates, is synthesized by a facile low-cost and eco-friendly one-pot solvothermal reaction. Compared to SnO 2 , SnSe, CNTs-SnO 2, SnO 2 /SnSe, the CNTs-SnO 2 /SnSe delivers significant performance, enhancement in photocatalytic degradation for aqueous organic dye pollutant under visible light irradiation in 60 min. The k value of CNTs-SnO 2 /SnSe is over 2.2 times larger than CNTs-SnO 2 , SnO 2 and SnSe. The remarkably enhanced photodegradation performance of CNTs-SnO 2 /SnSe is mainly attributed to its unique nanoarchitecture, high surface area and band gap matching: the CNTs skeleton can facilitate the electron transfer; band gap diagram of CNTs-SnO 2 /SnSe is beneficial to efficient electron-hole charge separation and recombination of electron-hole pair can be effectively suppressed. This work presents a rational catalyst design with nanoarchitecture and band gap matching, and a facile one-pot synthesis strategy to synthesize low-cost photocatalysts for dye pollutant degradation with prominent high-efficiency and long-term stability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2020
·
IF 1.943
Xuefeng Ren,Qianyuan Lv,Lifen Liu,Anmin Liu,Bihe Liu,Yiran Wang
Pt-based alloy electrocatalysts, PtNi/CNTs and PtNi, were synthesized through facile chemical reduction reaction for methanol oxidation reaction (MOR). Morphology, structure and composition of the PtNi/CNTs and PtNi electrocatalysts were physical characterized by the means of SEM, EDS, XRD and XPS. The catalytic activity, stability and durability of the obtained electrocatalysts were studied by cyclic voltammetry (CV) and amperrometric i-t cueves (i-t). The PtNi catalysts nanoparticles (NPs) obtained around 20 nm were homogenous distribution of two metal elements, and PtNi were well doped on the carbon nanotubes (CNTs) for PtNi/CNTs catalysts. The incorporation of Ni and high surface area of CNTs make the PtNi/CNTs and PtNi catalysts showing high eletrocatalytic activity for MOR. Furthermore, both PtNi/CNTs and PtNi electrocatalysts exhibit outstanding stability and durability at room temperature in acidic medium. This research provides positive guidance to prepare high performance and excellent stability electrocatalysts for MOR.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 7
·921
·
IF 4.7
Sheng Wu,Qian Liu,Wei Zhang,Ruizhe Wu,Hongping Tang,Yulin Ma,Wenqiang Xu,Shufang Jiang
As a promising candidate for high-energy-density rechargeable lithium metal batteries, Li/FeS2batteries still suffer from the large volume change and severe shuttle effect of lithium polysulfides during cycling. To improve the electrochemical performance, great efforts have been made to modify FeS2cathodes by constructing various nanocomposites. However, energy density is sacrificed, and these materials are not applicable at a large scale. Herein, we report that the electrochemical performance of commercial FeS2can be greatly enhanced with the application of a double-layer MoS2-CNTs-PVA (MCP)/PVA separator fabricated by electrospinning. The assembled Li/FeS2batteries can still deliver a high discharge capacity of 400 mAh/g after 200 cycles at a current density of 0.5 C. The improved cycling stability can be attributed to the strong affinity towards lithium polysulfides (LiPSs) of the hydroxyl-rich PVA matrix and the unique double-layer structure, in which the bottom layer acts as an electrical insulation layer and the top layer coupled with MoS2/CNTs provides catalytic sites for LiPS conversion.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Mang Li,Xueying Zhao,Peng Tang,Xuyang Zhang,Yufei Wu,Tengfei Jin,Rongxiu Liu,Guohua Wu,Xiangwei Wang
Perovskite shines as a top contender in the realm of electromagnetic waves (EMW) absorption, owing to its unique physical properties, structural characteristics, and multifunctionality. However, it is still a huge challenge to synthesize high-performance EMW absorbing perovskite materials with environmental-friendly and sustainable processes, despite the simplicity of the perovskite preparation procedures. To address this issue, a facile solvent-free method was developed in this study for CH 3 NH 3 PbI 3 (MAPbI 3 ), then introduced carbon nanotubes (CNTs) and subsequently prepared MAPbI 3 /CNTs (MC) composites using a simple procedure. The frequency, thickness, reflection loss (RL), and effective absorption bandwidth (EAB) of MC for EMW absorption were systematically investigated by adjusting the filling amount and component ratio of MC. It is interesting to find that the as-prepared MC composites always achieve high absorption intensities in X and Ku bands. Moreover, an appropriate amount of CNTs can further optimize the impedance matching of MC and promote the loss capability of MAPbI 3 .With a loading ratio of 25 wt% and a mass ratio of 2:1 between MAPbI 3 and CNTs, the MC sample exhibits excellent absorption capability, achieving the lowest RL of −63.8 dB at 1.8 mm and the maximum EAB of 5.16 GHz at 1.69 mm. These findings contribute to the design and development of organic-inorganic halide perovskite absorbers with superior EMW absorption performances.
研究领域:
材料科学
·
电磁学
✓ 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）