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4 article(s) from Zhao, Yan

Effect of Ag loading position on the photocatalytic performance of TiO₂ nanocolumn arrays

Jinghan Xu,
Yanqi Liu and
Yan Zhao

Beilstein J. Nanotechnol. 2020, 11, 717–728, doi:10.3762/bjnano.11.59

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Figure 1: Schematic diagram of the preparation process of the different Ag–TiO₂ nanocolumn structures. (1) St...

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Figure 2: SEM images of the top view of different samples: (a) AAO template, (b) TNC, (c) EDS of TNC, (d) AFT...

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Figure 3: SEM cross section of samples with AAO and Al substrate. (a) Observation sketch, (b) AAO template, (...

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Figure 4: TEM images of nanocolumn structures. a) TNC nanocolumn TEM image, b) TNC TEM diffraction pattern, c...

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Figure 5: XPS spectrum of AFT3: (a) Survey spectrum, and details of the regions related to (b) O 1s, (c) Ti 2...

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Figure 6: (a,b) UV–vis absorption spectra and (c,d) bandgaps of the different samples.

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Figure 7: Photocatalytic activity for the degradation of MB: (a) UV–vis absorption spectra for the photocatal...

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Figure 8: FDTD simulations of the electric field distribution of Ag-loaded TiO₂ nanocolumns with different st...

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Figure 9: (a) Schematic diagram of electron–hole separation and energy conversion of Ag–TiO₂ structures under...

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Full Research Paper

Published 05 May 2020

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TiO₂/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries

Ning Liu,
Lu Wang,
Taizhe Tan,
Yan Zhao and
Yongguang Zhang

Beilstein J. Nanotechnol. 2019, 10, 1726–1736, doi:10.3762/bjnano.10.168

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Figure 1: Schematic illustration of a Li/S battery with a TiO₂/GO-coated functional separator.

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Figure 2: (a) XRD patterns of the as-spun and as-dealloyed Ti₁₀Al₉₀ alloy foils. (b) Raman spectra of TiO₂, G...

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Figure 3: (a) SEM image, (b) element maps and (c) TEM image of the as-prepared nanoporous TiO₂ particles. (d)...

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Figure 4: Surface SEM images of (a) a pristine separator, (b) a TiO₂/GO-coated separator and (c) the TiO₂/GO-...

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Figure 5: CV curves of the Li/S batteries with a (a) pristine separator, (b) GO-coated separator and (c) TiO₂...

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Figure 6: (a) Cyclic performance and coulombic efficiency of the Li/S batteries with pristine, GO-coated and ...

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Figure 7: (a) Rate capability of the Li/S batteries with pristine, GO-coated and TiO₂/GO-coated separators. (...

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Figure 8: Nyquist plots of the Li/S batteries with pristine, GO-coated and TiO₂/GO-coated separators (a) befo...

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Figure 9: Optical images of the diffusion process of the polysulfides through the (a) pristine separator and ...

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Figure 10: (a) Raman and (b) FTIR spectra of the Li₂S₆-treated TiO₂/GO composite.

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Figure 11: XPS spectra (Ti 2p) of the battery with a TiO₂/GO-coated separator before and after charge/discharg...

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Full Research Paper

Published 19 Aug 2019

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A porous 3D-RGO@MWCNT hybrid material as Li–S battery cathode

Yongguang Zhang,
Jun Ren,
Yan Zhao,
Taizhe Tan,
Fuxing Yin and
Yichao Wang

Beilstein J. Nanotechnol. 2019, 10, 514–521, doi:10.3762/bjnano.10.52

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Figure 1: Synthesis of S-3D-RGO@MWCNT.

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Figure 2: SEM images of (a) RGO@MWCNT@SiO₂, (b, c) 3D-RGO@MWCNT at different magnifications and (d) S-3D-RGO@...

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Figure 3: TEM images of (a) 3D-RGO@MWCNT with two different magnifications, (b) S-3D-RGO@MWCNT, (c–e) TEM map...

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Figure 4: (a) XRD patterns of sulfur, 3D-RGO@MWCNT and S-3D-RGO@MWCNT; (b) Raman spectra of 3D-RGO@MWCNT and ...

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Figure 5: CV curves of the S-3D-RGO@MWCNT cathode at 0.1 mV·s⁻¹ in the first four cycles.

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Figure 6: (a) CV measurement of the S-3D-RGO@MWCNT cathode (1st, 50th, 100th, 150th and 200th cycle) at 1C; (...

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Figure 7: (a, b) Specific capacity and rate performance of S-3D-RGO@MWCNT cathode at different C-rate, rangin...

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Figure 8: Nyquist plots of S-3D-RGO@MWCNT cathode and the equivalent circuit model (inset).

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Full Research Paper

Published 21 Feb 2019

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Nitrogen-doped carbon nanotubes coated with zinc oxide nanoparticles as sulfur encapsulator for high-performance lithium/sulfur batteries

Yan Zhao,
Zhengjun Liu,
Liancheng Sun,
Yongguang Zhang,
Yuting Feng,
Xin Wang,
Indira Kurmanbayeva and
Zhumabay Bakenov

Beilstein J. Nanotechnol. 2018, 9, 1677–1685, doi:10.3762/bjnano.9.159

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Figure 1: XRD patterns of S, ZnO@NCNT and S/ZnO@NCNT composite.

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Figure 2: TGA curve of the S/ZnO@NCNT composite.

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Figure 3: (a) HRTEM image; (b) SAED patterns; (c) TEM image; (d–g) EDX mapping images of the ZnO@NCNT composi...

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Figure 4: (a) SEM image; (b–f) EDX mapping; (g,h) TEM images of S/ZnO@NCNT composite.

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Figure 5: XPS spectra of S/ZnO@NCNT composite.

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Figure 6: Discharge/charge voltage profiles of the S/ZnO@NCNT cathode for the initial three cycles at 0.2C.

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Figure 7: Cycling performance of the S/ZnO@NCNT cathode at 0.2C.

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Figure 8: Long-term cycle life of the S/ZnO@NCNT cathode at 1C.

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Figure 9: The performance comparison of S/ZnO@NCNT electrodes with sulfur loadings of 2.5, 3.25, 4.0 and 4.75...

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Figure 10: Rate capability of the S/ZnO@NCNT composite cathode.

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Figure 11: Discharge/charge voltage profiles of S/ZnO@NCNT composite cathode at various rates.

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Full Research Paper

Published 06 Jun 2018

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Effect of Ag loading position on the photocatalytic performance of TiO2 nanocolumn arrays

TiO2/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries

A porous 3D-RGO@MWCNT hybrid material as Li–S battery cathode

Nitrogen-doped carbon nanotubes coated with zinc oxide nanoparticles as sulfur encapsulator for high-performance lithium/sulfur batteries

Effect of Ag loading position on the photocatalytic performance of TiO₂ nanocolumn arrays

TiO₂/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries