The report of MoS 2 nanotubes

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

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