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Advances in MoS2 Nanotube Synthesis: Techniques and Insights

This report synthesizes key findings on the fabrication of MoS2 nanotubes from various studies. It covers multiple synthesis methods, including template synthesis, high-temperature gas-phase reactions, and mental-organic chemical vapor deposition (MOCVD). The challenges related to controlling size and distribution are discussed, alongside advancements that have achieved refined structures. Key results from different methodologies underscore the importance of temperature, atmospheric conditions, and precursor materials in determining the quality and morphology of the produced nanotubes.

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Advances in MoS2 Nanotube Synthesis: Techniques and Insights

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  1. The report of MoS2 nanotubes Made by Tian Ye

  2. The Content Papers I have read 分标题 一 The content The synthesis of MoS2 nanotube summary

  3. Papers I have read Template Synthesis of Near-Monodisperse Microscale Nanofibers and Nanotubules of MoS2 1 2 Simple Synthesis of MoS2 and WS2 Nanotubes mental-organic chemical vapor deposition synthesis of hollow inorganic –fullerene-type MoS2 nanoparticals 3 4 Inorganic Nanotubes as Nanoreactors: The First MoS2 nanopods Diffusion-Driven Formation of MoS2 Nanotube Bundles Containing MoS2 Nanopods 5

  4. The synthesis of MoS2 nanotubes 5Diffusion-driven formation 2005 2011 2001 4Mental-organic chemical vapor deposition synthesis 1998 3 high temperature synthesis 1995 2 template synthesis 1 High temperature gas phase reaction

  5. The synthesis of MoS2 nanotubes 1 High temperature gas-phase reaction 800℃ MoO3+H2S MoS2 95％N2,5％H2 95％N2,5％H2 MoOx （x＜3amorphous） MoO3 95％N2,5％H2 (Nanotubes and polyhedral particles) MoOx +H2S MoS2

  6. The synthesis of MoS2 nanotubes 1 High temperature gas-phase reaction shortcoming They have not been able to control the size or size distribution of the nanotubules

  7. The synthesis of MoS2 nanotubes 2 template synthesis Peter K.Dorhout used a template to control over the size and size distribution of nanofibers or tubules of MoS2 template Al2O3

  8. The synthesis of MoS2 nanotubes 2 template synthesis The procedure for the growth of porous sheets of aluminum oxide 40v aluminum plates 10 hours e e H2 Al2O3 H+ + Al+3 OH- Al+3 HOOC-COOH

  9. The synthesis of MoS2 nanotubes 2 template synthesis gradually reduce the voltage soak the electrode for several hours e Al2O3 detaches from the electrode e Rinse several times with deionized water templates 25 ％ H2SO4

  10. The synthesis of MoS2 nanotubes 2 template synthesis Al2O3 template Solution of NaOH Rinse with distilled water 30min 10 ％ H2 90 ％ N2 20ml/min 70℃ (NH4)2MoS4 10 ℃/min 450 ℃ Constant T for 1 h DMF solution

  11. The synthesis of MoS2 nanotubes 2 template synthesis 450℃ +2H2S (NH4)2MoS4+H2 +2NH3 MoS2 N2 reaction the size and shape of the MoS2 tubules and fibers could be controlled diameters ranging from 50 to 330 nm lengths approaching 30-60 μm

  12. The synthesis of MoS2 nanotubes 2 template synthesis Figure 1. An SEM micrograph of the MoS2 fibers after dissolution of the Al2O3 template. Figure 3. A TEM image of a bend in a tubule of MoS2 emphasizing the hollow nature of the tubules Figure 2. A TEM image of the MoS2 tubules after dissolution of the Al2O3 template

  13. The synthesis of MoS2 nanotubes 3 high temperature synthesis 800℃ MoO3+H2S MoS2 95％N2,5％H2 Tenne et al Rao’ group a MoS3 intermediate decompose MoS2 nanotubes

  14. The synthesis of MoS2 nanotubes 3 high temperature synthesis confirmation • Heat MoS3 Prepare MoS3 T=400 ℃ in an Ar atmosphere T=1200 ℃-1300 ℃ MoS3 + H2 MoS2 + H2S (NH4)2MoS4 MoS3 + H2S + NH3 an excellent yield of nanotubes The outer diameter :30 -45 nm and the inner diameter : 7-8 nm

  15. The synthesis of MoS2 nanotubes 3 high temperature synthesis 120 30 50 TEM images of MoS2 nanotubes obtained by the treatment of MoS3 with hydrogen at 1300 ℃

  16. The synthesis of MoS2 nanotubes 3 high temperature synthesis MoS3 itself is a decomposition product of (NH4)2MoS4 directly heat (NH4)2MoS4 in a hydrogen atmosphere 1200-1300℃ The outer diameter :25nm +2H2S +2NH3 (NH4)2MoS4+H2 MoS2

  17. The synthesis of MoS2 nanotubes 4Mental-organic chemical vapor deposition synthesis Anneal Nested fullerene MoS2 Mo(CO)6 +S (g) Amorphous MoS2 (layer) Flush with Ar for an hour Heat materials:Mo(CO)6 150℃ , S 250℃ 120 450℃ Inlet constant Ar flow (200ml/min) Reaction deposition Heat treatment :700 ℃ -800 ℃ 1 hour anneal

  18. The synthesis of MoS2 nanotubes 4Mental-organic chemical vapor deposition synthesis Figure2. High resolution TEM image of MoS2 heat-treated at 700 ℃ Figure1. TEM image of MoS2 heat-treated at 450 ℃

  19. The synthesis of MoS2 nanotubes 4Mental-organic chemical vapor deposition synthesis Heat and anneal

  20. The synthesis of MoS2 nanotubes 5Diffusion-driven formation(MOCVDS) I2 H2S Anneal Mo(CO)6 + MoS2 MoS2 nanotubes (spherical) Figure1. SEM images of MoS2 without using iodine Figure2. SEM images of MoS2 with using iodine

  21. The synthesis of MoS2 nanotubes 5Diffusion-driven formation(MOCVDS) 120 outward diffusion flow of I2 vacuum

  22. Summary • three ways to synthetize MoS2 nanotubes • High temperature gas phase reaction template synthesis • MOCVDS 50 • High temperature synthesis Diffusion-driven formation 点击添加标题

  23. Summary Prepare for the exam 3P Project the kinetics paper Practice the experiment

  24. Thank You !

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