Nano-Micro Letters
·
2019
·Vol. 11
·期 1
·1-14
·
IF 9.043
Luo Linqu,Song Jianjun,Song Longfei,Zhang Hongchao,Bi Yicheng,Liu Lei,Yin Longwei,Wang Fengyun,Wang Guoxiu
3D hierarchical conductive Sn quantum dots encapsulated in N,S co-doped carbon nanofibers sheathed within rGO scrolls (Sn/NS-CNFs@rGO) were prepared through an electrospinning process.
Flexible Sn/NS-CNFs@rGO electrode exhibits superior long-term cycling stability and high-rate capability in sodium-ion batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Du Jun,Zhao Guomin,Pan Mingzhu,Zhuang Leilei,Li Dagang,Zhang Rui
Nanocellulose reinforced poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) composites were prepared using melt compounding. The effects of nanocellulose types (CNCs and CNFs) and nanocellulose content (1, 2, 3, 4, 5, 6 and 7 wt%) on the crystallization, thermal and mechanical properties of PHBV composites were systematically compared in this study. The thermal stability of PHBV composites was improved by both CNCs and CNFs. CNFs with a higher thermal stability leaded to a higher thermal stability of PHBV composites. Both CNCs and CNFs induced a reduction in the crystalline size of PHBV spherulites. Furthermore, CNCs could act as a better nucleating agent for PHBV than did CNFs. CNCs and CNFs showed reinforcing effects in PHBV composites. At the equivalent content of nanocellulose, CNCs led to a higher tensile modulus of PHBV composites than did CNFs. 1 wt% CNCs/PHBV composites exhibited the most optimum mechanical properties.
研究领域:
材料科学
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yu Xin,Shuqing Nie,Shi Pan,Chang Miao,Haoyi Mou,Minyue Wen,Wei Xiao
The SnSb and TiO 2 nanoparticles uniformly embedded into continuous and conductive carbon nanofibers (CNFs) are successfully fabricated through facile electrospinning combined with calcination treatments. The characterization results of the targeted composite nanofibers (Sb-SnSb/TiO 2 @CNFs-2) confirm that the presence of TiO 2 is of significant importance to construct the elaborately designed and intact fiber structure, in which the optimal dosage of the TiO 2 precursor is precisely controlled at 2 mmol. Moreover, high theoretical specific capacity of SnSb, available inhibitory effect of TiO 2 , and great electronic conductivity of CNFs are cooperatively integrated into the Sb-SnSb/TiO 2 @CNFs-2 composite nanofibers, guaranteeing the enhanced lithium storage capacity and cycling performance when being employed as the anode electrodes. Specifically, the Sb-SnSb/TiO 2 @CNFs-2 electrode can not only deliver initial discharge specific capacity of 1146.6 mAh/g at 100 mA/g and reversible discharge specific capacity of 580.4 mAh/g after 100 cycles, but also retain discharge specific capacity of 561.3 mAh/g after rate cycles along with recovering the current density to 100 mA/g. Importantly, the Sb-SnSb/TiO 2 @CNFs-2 electrode is also endowed with prominent advantages in the pseudocapacitive contribution of 66.89 % at 0.8 mV/s. Those investigations and findings of the Sb-SnSb/TiO 2 @CNFs-2 composite electrodes with facile fabrication process and excellent electrochemical performance can contribute to the practical application of the alloy anodes in the field of the energy storage.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ACS Sensors
·
2023
·
IF 8.9
Huajing Wang,Zhou Cui,Rui Xiong,Xiaoxia Wang,Wulin Song,Xiang Guo,Xiao Wu,Baisheng Sa,Dawen Zeng
Although two-dimensional (2D) transition-metal dichalcogenides (TMDs) exhibit attractive prospects for gas-sensing applications, the rapid and precise sensing of TMDs at low loss remains challenging. Herein, a NO2 sensor based on an expanded VS2 (VS2-E)/carbon nanofibers (CNFs) composite (abbreviated as VS2-E-C) with ultrafast response/recovery at a low-loss state is reported. In particular, the impact of the CNF content on the NO2-sensing performance of VS2-E-C was thoroughly explored. Expanded VS2 nanosheets were grafted onto the surface of hollow CNFs, and the combination boosted the charge transport, exposing abundant active edges of VS2, which enhanced the adsorption of NO2 efficiently. The activity of the VS2 edge is further confirmed by stronger NO2 adsorption with a more negative adsorption energy (−3.42 eV) and greater than the basal VS2 surface (−1.26 eV). Moreover, the exposure of rich edges induced the emergence of the expanded interlayers, which promoted the adsorption/desorption of NO2 and the interaction of gas molecules within VS2-E-C. The synergism of edge effect and interlayer engineering confers the VS2-E-C3 sensor with ultrafast response/recovery speed (9/10 s) at 60 °C, high sensitivity (∼2.50 to 15 ppm NO2), good selectivity/stability, and a low detection limit of 23 ppb. The excellent “4S” functions indicate the promising prospect of the VS2-E-C3 sensor for fast and precise NO2 detection at low-loss condition.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 2
·025304
·
IF 1.151
Lingfeng Yang,Haopeng Cai,Bin Zhang,Siqi Huo,Xi Chen
Novel electromagnetic functionalized carbon nanofibers (CNFs) have been synthesized by coating with Fe3O4 magnetite nanoparticles and conducting polymers polyaniline (PANI) on CNFs through a layer by layer assembly. The Fe3O4@CNFs were first prepared by coating nano-Fe3O4 particles on CNFs via co-precipitation method; Then the PANI was coated on Fe3O4@CNFs using an in situ polymerization process to obtain PANI@Fe3O4@CNFs nanoparticles. The prepared PANI@Fe3O4@CNFs nanoparticles were dispersed in the epoxy matrix to fabricate microwave absorbing nanocomposites. Compared with the Fe3O4@CNFs/epoxy nanocomposites, the PANI@Fe3O4@CNFs/epoxy nanocomposites exhibit better microwave absorbing properties. The composite containing 15 wt% of PANI@Fe3O4@CNFs with the thickness of 2 mm showed a minimum reflection loss (RL) value of −23.7 dB with an effective absorption bandwidth which is about 3.7 GHz (11.9–15.6 GHz) in the frequency range of 1–18 GHz, indicating that it is an attractive candidate for efficient microwave absorber. A potential absorption mechanism was proposed for enhancement of the impedance-matching condition and electromagnetic wave-attenuation characteristic of materials. Specifically, the impedance-matching condition was improved by the combination of conductive polymers and magnetic nanoparticles with CNFs. The electromagnetic wave attenuation characteristic was enhanced by multiple reflections, due to the increased propagation paths.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 12
·2089
·
IF 5.719
Jun Li,Dongyan Liu,Junsheng Li,Fei Yang,Guoxin Sui,Yu Dong
In this paper, the novel morphology of cellulose nanofibers (CNFs) with a unique tree-branched structure was discovered by using acid hydrolysis assisted with pre-disintegration treatment from wood pulps. For comparison, the pulps derived from both softwood and hardwood were utilized to extract nanocellulose in order to validate the feasibility of proposed material fabrication technique. The morphology, crystalline structures, chemical structures, and thermal stability of nanocellulose were characterized by means of transmission electron microscopy (TEM), X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FTIR), as well as thermogravimetric analysis (TGA). Prior to acid hydrolysis, softwood and hardwood pulps underwent the disintegration treatment in the fiber dissociator. It has been found that nanocellulose derived from disintegrated pulps possesses much longer fiber length (approximately 5–6 μm) and more evident tree-branched structures along with lower degree of crystallinity when compared with those untreated counterparts. The maximum mass loss rate of CNFs takes place at the temperature level of approximately 225 °C, and appears to be higher than that of cellulose nanowhiskers (CNWs), which might be attributed to an induced impact of amorphous content. On the other hand, disintegration treatment is quite beneficial to the enhancement of tensile strength of nanocellulose films. This study elaborates a new route of material fabrication toward the development of well-tailored tree-branched CNFs in order to broaden the potential widespread applications of nanocellulose with diverse morphological structures.Keywords:nanocellulose;tree-branched cellulose nanofibers (CNFs);acid hydrolysis;wood pulps;disintegration treatment
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 34
·20052-20063
·
IF 4.6
Niu Biye,Fu Taiping,Yan Xinrong,Gao Feixiang,Liu Yufeng,Guo Yakun,Shuai Maobing
In closed systems, hydrogen accumulation
poses significant safety
risks, necessitating the development of highly efficient hydrogen
uptake materials. The PtRu/CNFs-catalyzed hydrogenation of 1,4-bis(phenylethynyl)benzene
(DEB) shows promise; however, it is susceptible to deactivation by
trace carbon monoxide (CO) poisoning. This study successfully synthesized
a PtRuRhMnCo multicomponent alloy catalyst supported on carbon nanofibers
(PtRuRhMnCo/CNFs) via a solvothermal method, yielding an average particle
size of 1.87 nm and uniform distribution of the constituent metal
elements. The incorporation of multicomponent alloys lowers the Pt
d-band center, thereby weakening CO adsorption strength. After 10
h of reaction under 500 ppm of CO/H 2 , the alkynyl group
conversion reached 87.3%, whereas the phenyl group conversion was
18.6%. Catalytic activity remained stable over four consecutive cycles,
and hydrogen uptake capacity reached 600 mL·g –1 after a 100 h long-term evaluation. Theoretical calculations indicated
that multicomponent alloying shifted the Pt d-band center downward
from −2.39 eV to −2.43 eV, significantly reducing the
CO adsorption energy. This study demonstrates that the multicomponent
alloying strategy markedly enhances the catalyst’s CO tolerance
by modulating its electronic structure, providing a novel approach
to designing high-performance hydrogen uptake materials.
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Yuan Deng,Qingqing Guan,Liang He,Jing Li,Lincai Peng,Junhua Zhang
The existence of hydroxyl and carboxyl groups makes the photothermal stability of cellulose nanofibers (CNFs) poor and thus limits its scale application. This problem could be solved by doping layered double hydroxides (LDHs) nanopowders with opposite charge on the surface of CNFs . This work mainly focused on investigation of the influence of the crystal morphology of the inorganic ultraviolet shielding agent (i.e. ZnAl-LDHs) on the thermal stability of CNFs/ZnAl-LDHs composited films. The results showed that the morphology of LDHs was positively correlated with the photothermal stability of CNFs-based films. Specially, the ZnAl-LDHs with uniform crystal morphology could be prepared by controlling the molar ratio of Zn/Al at 3:1 and thus enhance the photothermal stability of CNFs-based films without any serious light transmittance deteriorating after doping. This work provided a practical and effective way for preparation of photothermal-stable CNFs-based transparent films for industrial application in the fields of photonics and electronics.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Sustainability
·
2023
·
IF 7.8
J. Pan,C. Sun,X. Zhao,J. Liu,C. Wang,C. Jiao,J. Sun,Q. Wang
Due to its high theoretical capacity and plentiful deposits, Si has been extensively explored as a potential anode material for lithium-ion batteries. Research on Si-based materials is currently concentrated on problems like enhancing the volume effect (by around 300%) and the electrical conductivity of Si. As a result, using the electrostatic spinning method, Si@NiO@Carbon Nanofibers (CNFs) anodes with dual modifications were created in this research. A more stable and substantial specific capacity for lithium-ion batteries is achieved due to the unique structure's amelioration of the agglomeration phenomena, volume expansion effect, and low conductivity of Si nanoparticles . At a high current density of 3 A/g, it has an excellent reversible specific capacity, and after 1000 cycles in a lithium-ion battery, it still has a specific capacity of 861.77 mAh/g. Exhibits favorable rate performance at various current densities. In addition, after 1000 cycles, the surface of the Si@NiO@CNFs electrode is smooth, the structure is undamaged, and the cross-sectional thickness expands by approximately 23.19%. As a high-performance energy storage material , Si-based anode material with twofold modification has many potential applications. By designing the structure of the Si cladding layer , this study offers a novel, efficient, and practicable solution for the rapid capacity decline of Si materials.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2022
·Vol. 16
·期 4
·1-13
·
IF 2.612
Chen Fenglan,Liu Xin,Wang Zhengya,Tie Shengnian,Wang Chang-An
As a kind of essential hydrated salt phase change energy storage materials, mirabilite with high energy storage density and mild phase-transition temperature has excellent application potential in the problems of solar time and space mismatch. However, there are some disadvantages such as supercooling, substantial phase stratification and leakage problem, limiting its further applications. In this work, for the preparation of shaped mirabilite phase change materials (MPCMs), graphene (GO), sodium carboxymethyl cellulose (CMC), and carbon nanofibers (CNFs) were used as starting materials to prepare lightweight CMC/rGO/CNFs carbon aerogel (CGCA) as support with stable shape, high specific surface area, and well-arranged hierarchically porous structure. The results show that CGCA has regular layered plentiful pores and stable foam structure, and the pore and sheet interspersed structure in CGCA stabilizes PCMs via capillary force and surface tension. The hydrophilic aerogels supported MPCMs decrease mirabilite leaking and reduce supercooling to around 0.7–1 °C. The latent heats of melting and crystallization of CGCA-supported mirabilite phase change materials (CGCA-PCMs) are 157.1 and 114.8 J·g −1 , respectively. Furthermore, after 1500 solid—liquid cycles, there is no leakage, and the retention rate of crystallization latent heat is 45.32%, exhibiting remarkable thermal cycling stability.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 21
·3213-3224
·
IF 8.683
Wenfang Miao,Feirong Huang,Xiaochen Shen,Shaopeng Li,Xingru Cao,Xuefeng Zhang,Jieyi Yu,Xinglong Dong
The development of high-efficiency, stable, and low-cost Fe–N–C electrocatalysts for the oxygen reduction reaction (ORR) has attracted considerable attention. Herein, a stable atomically dispersed Fe–Nx-based catalyst was synthesized from a hierarchical structure involving carbon nanofiber (CNF)-supported zeolitic-imidazolate-framework-8 (ZIF-8) encapsulated Fe–Phen complex ((Fe,N)-ZIF-8/CNFs). The Fe–Nx–CNFs obtained from the pyrolysis of (Fe,N)-ZIF-8/CNFs showed a good hierarchical multi-layer structure. The natural network structure of the carbon nanofibers serves as a matrix to uniformly distribute the ZIF-8 particles, and the Fe–Nx sites derived from the Fe–Phen complex were uniformly distributed in ZIF-8 particles. It exhibits excellent ORR performance with a high half-wave potential of 0.875 V (vs. RHE), which was 55 mV higher than that of the commercial Pt/C catalyst. In addition, density functional theory (DFT) calculations on the catalyst further revealed the origin of the ORR activity via a 4e− pathway from the precise local coordination of FeN4 sites.
研究领域:
材料科学
·
电化学
·
催化化学
·
纳米技术
·
能源化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Ming Yan,Chaochao Tian,Ting Wu,Xingyu Huang,Yidan Zhong,Pei Yang,Lili Zhang,Jinxia Ma,Hailong Lu,Xiaofan Zhou
To achieve the balance on economy and ecology, it is indispensable to explore the greener and more inexpensive method for the production of cellulose nanofibrils (CNFs). Herein, a deep eutectic solvent (DES) system based on choline chloride (ChCl) and ethylene glycol (EG) was employed as the swollen solvent, combining with screw extrusion and permeant, to fabricate unmodified CNFs with high yield and thermal stability . The proposed method in this work was simple, convenient, and industrially viable. The hydrous DESs were applied in the process of CNFs preparation and dispersion to reduce the cost and viscosity of DES. To reveal the principle of CNFs preparation, the impact of sulfuric acid and water content of DES system on the chemical, physical, morphological, thermal, and dispersive properties of CNFs was systematically studied. Properties of the dispersed solvents were characterized by solvatochromic parameters and viscosity parameters to evaluate the potential influence on the preparation and dispersion of CNFs. In general, this work would play valuable guidance in realizing the preparation and dispersion of CNFs via a versatile DES solvent system, thus endowing cellulose materials high-value utilization.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）