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4 article(s) from Xu, Lan

Batch preparation of nanofibers containing nanoparticles by an electrospinning device with multiple air inlets

Dong Wei,
Chengwei Ye,
Adnan Ahmed and
Lan Xu

Beilstein J. Nanotechnol. 2023, 14, 141–150, doi:10.3762/bjnano.14.15

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Figure 1: Diagram of EMAI (a); 3D diagram of the copper porous spinneret (b) and its corresponding longitudin...

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Figure 2: EMAI spinning processes at different air flow rates (150 m³/h (a), 100 m³/h (b), 50 m³/h (c), and 0...

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Figure 3: Morphology and corresponding diameter distribution of nanofibers obtained by EMAI at different air ...

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Figure 4: Morphology and corresponding diameter distribution of nanofibers obtained by EMAI at different volt...

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Figure 5: The yields of nanofibers obtained with different spinning voltages at the air flow rates of 50 m³/h...

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Figure 6: Electric field distribution at the porous spinneret at different voltages (40 kV (a), 50 kV (b), an...

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Figure 7: Distribution of electric field intensity at the top of spinneret under different voltages (40 kV (a...

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Figure 8: Radial (a) and axial (b) electric field distributions of the porous spinneret at different voltages....

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Full Research Paper

Published 23 Jan 2023

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Structure and electrochemical performance of electrospun-ordered porous carbon/graphene composite nanofibers

Yi Wang,
Yanhua Song,
Chengwei Ye and
Lan Xu

Beilstein J. Nanotechnol. 2020, 11, 1280–1290, doi:10.3762/bjnano.11.112

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Figure 1: Diagram of the preparation process of the ordered porous CGCNFs. Setup scheme adapted from [33], distri...

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Figure 2: FE-SEM images of (a) disordered PGCNFs synthesized via electrospinning (DPGCNFs) with an average di...

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Figure 3: (a) FTIR spectra of PAN nanofibers (dark green), graphene (light green), PGCNFs (purple) and CGCNFs...

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Figure 4: (a) Nitrogen adsorption–desorption isotherms and (b) their corresponding PSD curves determined by t...

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Figure 5: CV curves of the CGCNF electrodes at a scan rate of 25 mV/s.

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Figure 6: Charge/discharge curves of samples in a 6 M KOH electrolyte solution.

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Figure 7: Electrochemical impedance spectra of the samples represented as Nyquist plots.

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Full Research Paper

Published 27 Aug 2020

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Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

Wei Fang,
Liang Yu and
Lan Xu

Beilstein J. Nanotechnol. 2020, 11, 631–650, doi:10.3762/bjnano.11.50

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Figure 1: Schematic of the preparation of heterostructured CuO–ZnO-loaded CNFMs.

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Figure 2: SEM images of electrospun CNFMs with different PVDF/PAN weight ratios: (a) 9:1; (b) 7:3; (c) 5:5; (...

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Figure 3: Pore size distributions of CNFMs with different PVDF/PAN weight ratios.

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Figure 4: Contact angles of CNFMs with different PVDF/PAN weight ratios: (a) 9:1; (b) 7:3; (c) 5:5; (d) 3:7; ...

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Figure 5: Mechanical properties of the CNFMs with different PVDF/PAN weight ratios: (a) 9:1; (b) 7:3; (c) 5:5...

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Figure 6: SEM images of the electrospun CNFMs with different weight ratios of Cu(Ac)₂/Zn(Ac)₂ to PAN/PVDF: (a...

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Figure 7: FTIR spectra of the CNFMs with different weight ratios [Cu(Ac)₂/Zn(Ac)₂]/[PVDF/PAN]: (a) 0:1; (b) 1...

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Figure 8: XRD spectra of the CNFMs with different [Cu(Ac)₂/Zn(Ac)₂]/[PVDF/PAN] weight ratios: (a) 0:1; (b) 1:...

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Figure 9: XRD spectra of (a) pure Cu(Ac)₂ powder and (b) pure Zn(Ac)₂ powder.

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Figure 10: SEM images of PVDF/PAN CNFMs with CuO and ZnO nanoparticles obtained after 2 h of heat treatment at...

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Figure 11: FTIR spectra of (a) CNFMs with heat treatment for 2 h at 140 °C; (b) CNFMs without heat treatment; ...

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Figure 12: XRD spectra of (a) the CNFMs after heat treatment for 2 h at 140 °C; (b) the CNFMs without heat tre...

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Figure 13: Mechanical properties of the CNFMs obtained after heat treatment for 2 h at different temperatures:...

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Figure 14: Contact angles of (a) the CNFMs without heat treatment and (b-g) the CNFMs with heat treatment for ...

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Figure 15: SEM images of PVDF/PAN CNFMs with CuO and ZnO nanoparticles obtained after heat treatment at 130 °C...

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Figure 16: SEM images of heterostructured CuO–ZnO-loaded CNFMs obtained using different dilutions of the growt...

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Figure 17: SEM images of heterostructured CuO–ZnO-loaded CNFMs after hydrothermal synthesis at different tempe...

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Figure 18: SEM images of heterostructured CuO–ZnO-loaded CNFMs after different times of hydrothermal synthesis...

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Figure 19: X-ray diffraction pattern of heterostructured CuO–ZnO-loaded CNFMs.

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Figure 20: Elemental compositions of CNFMs with different CuO–ZnO heterostructures.

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Figure 21: Morphologies and CA of CNFMs before and after heat treatment, and after hydrothermal growth: (a) wi...

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Figure 22: Mechanism of the hydrophilicity of CNFMs with CuO–ZnO heterostructures.

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Figure 23: Left: degradation rate of methyl orange solutions using samples A, B, C and D as a function of the ...

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Figure 24: Mechanism of the photocatalytic degradation of methyl orange using the heterostructured CuO–ZnO-loa...

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Full Research Paper

Published 15 Apr 2020

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Four self-made free surface electrospinning devices for high-throughput preparation of high-quality nanofibers

Yue Fang and
Lan Xu

Beilstein J. Nanotechnol. 2019, 10, 2261–2274, doi:10.3762/bjnano.10.218

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Figure 1: Schematic of (A) the modified bubble electrospinning (MBE) [21] and (B) the free surface electrospinnin...

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Figure 2: Schematic diagrams of the four solution reservoirs. (A-1), (B-1), (C-1) and (D-1) are the 3D schema...

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Figure 3: Photographs of the MBE (A), MFSE (B), OSFSE (C) and SSFSE (D) process.

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Figure 4: Time-lapse images (0–15 s) of the jet initiation process of OSFSE. The voltage was turned on and he...

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Figure 5: Time-lapse images (10–120 ms) of the jet initiation process of OSFSE. The voltage was turned on and...

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Figure 6: The forces acting at point A of the jet in the FSE process.

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Figure 7: Simulation of the electric field in the MBE (A) and MFSE (B) devices.

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Figure 8: Simulation of the electric field in the OSFSE (C) and SSFSE (D) devices.

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Figure 9: Distribution of the electric field along the vertical axis from the center of the solution surface ...

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Figure 10: Distribution of the electric field along the radial axis (0–20 mm). A, B, C and D correspond to the...

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Figure 11: SEM images and the corresponding diameter distribution of the PAN nanofibers obtained by the four s...

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Figure 12: Yields of the PAN nanofibers produced using the different setups.

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Full Research Paper

Published 15 Nov 2019

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