Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3...
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Transcript of Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3...
![Page 1: Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3 BaTiO 3 PbTiO 3 G. Patzke, F. Krumeich, R. Nesper, Angew.](https://reader036.fdocuments.us/reader036/viewer/2022062322/56649f305503460f94c4b669/html5/thumbnails/1.jpg)
Secondary Nanotubes and Fills
C-NT
V3O7 - NR
Al2O3
MoO3
RuO2
ZrO2
carbon
TiO2
Ga2O3
BaTiO3
PbTiO3
G. Patzke, F. Krumeich, R. Nesper, Angew. Chem. 2002, 114, 2554
on in
onTiO2
SiO2
inFe
![Page 2: Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3 BaTiO 3 PbTiO 3 G. Patzke, F. Krumeich, R. Nesper, Angew.](https://reader036.fdocuments.us/reader036/viewer/2022062322/56649f305503460f94c4b669/html5/thumbnails/2.jpg)
Composite Nanotubes
tube walls comprise well-developed layers of PbS nanoparticles that are embedded in the organic matrix structure
Self-assembly in a colloid containing PbS nanoparticles, a polymer (poly(ethylene oxide)), and a surfactant (sodiumdodecylsulfate)
![Page 3: Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3 BaTiO 3 PbTiO 3 G. Patzke, F. Krumeich, R. Nesper, Angew.](https://reader036.fdocuments.us/reader036/viewer/2022062322/56649f305503460f94c4b669/html5/thumbnails/3.jpg)
Silica Nanotubes
Hippe, Wark, Lork, Schulz-Ekloff, Microp. Mesop. Mater. 31 (1999) 235
[Pt(NH3)4(HCO3)2 single crystals
coated by SiO2 and TiO2
through Si(OEt)4 or Ti(OEt)4
Pt
![Page 4: Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3 BaTiO 3 PbTiO 3 G. Patzke, F. Krumeich, R. Nesper, Angew.](https://reader036.fdocuments.us/reader036/viewer/2022062322/56649f305503460f94c4b669/html5/thumbnails/4.jpg)
Template-assisted Synthesis of Nanotubes
Rod-like Template
Coating of anisotopically structured template with a second material
Removal of template
Caruso, Antonietti, Chem. Mater. 13 (2001) 3272
Nanotube
![Page 5: Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3 BaTiO 3 PbTiO 3 G. Patzke, F. Krumeich, R. Nesper, Angew.](https://reader036.fdocuments.us/reader036/viewer/2022062322/56649f305503460f94c4b669/html5/thumbnails/5.jpg)
Next steps
J. Zygmunt, F. Krumeich, R. Nesper, Adv. Mater. 2003, 15, 1538
Wires of V3O7·H2O
Silica nanotubes
1 m
Intermediate product
TEM
Silica Nanotubes
V map
Si map
Template-assisted Synthesis of Nanotubes
![Page 6: Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3 BaTiO 3 PbTiO 3 G. Patzke, F. Krumeich, R. Nesper, Angew.](https://reader036.fdocuments.us/reader036/viewer/2022062322/56649f305503460f94c4b669/html5/thumbnails/6.jpg)
Topotactic redox reactions of copper(II) and iron(III) salts within VOx Nanotubes
Novel Cu- and Fe-containing nanotubes of composition
VO1.53-2.1(C12H28N)0.21Cu0.08(H2O)0.56Cl0.01 and
VO2.08-2.68 (C12H28N)0.13Fe0.19(H2O)0.33Cl0.01
have been obtained by exchange of the protonated template in dodecylamine-VOx nanotubes with Cu(II) and Fe(III) salts. The exchanged materials have quite different characteristics in respect to the parent nanotubes, namely a wider inner diameter and thinner walls, owing to reduced interlayer spacings in their multiwalled structure.
![Page 7: Secondary Nanotubes and Fills C-NT V 3 O 7 - NR Al 2 O 3 MoO 3 RuO 2 ZrO 2 carbon TiO 2 Ga 2 O 3 BaTiO 3 PbTiO 3 G. Patzke, F. Krumeich, R. Nesper, Angew.](https://reader036.fdocuments.us/reader036/viewer/2022062322/56649f305503460f94c4b669/html5/thumbnails/7.jpg)
SiO2 tubes –TiO2 coated
SiO2 tubes –Fe2O3 coated
Triple layer rods1. VOx fibers 2. SiO2 tubes 3. carbon coating
Multiple Coatings
Asbestos - C coated
Iron oxide rods-
C coated