液体中激光烧蚀法制备纳米材料 PPT
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液体中激光烧蚀法制备纳米材料
Basic mechanism of LAL(laser ablation in liquids)
Sketch of the main stages of LAL
Phys. Chem. Chem. Phys., 2013, 15 , 3027--3046
Basic mechanism of LAL
Sketch of the plasma plume formed by laser ablation of a metal target. * Denotes excited and/or ionized states
Phys. Chem. Chem. Phys., 2009, 11 , 3805–3821
Basic mechanism of LAL
FeO Nanoparticles by LAL
Adv. Funct. Mater. 2012, 22, 1333–1353
Nanoparticles Derived from LAL method
Ultra-small size distribution Metastable structure Unoccupied/charged surfaces
LALinduced
NPs
Quantum size effects New structures and properties Easy-functionalization
High activity and reactivity
Nanoparticles Synthesized by Chemical Routes
Capped with various stable reagents to prevent aggregation or reaction
Stable and surface passivated
Activity and Reactivity
A (assemble or growth) A + A
A AA
or A
A+B
A+ B
= C → New compounds
C
=AB → Composites
AB
Examples
1. LAL-based to fabricate carbon-encapsulated metal carbides 2. LAL-based synthesis of ternary oxides 3. LAL-based complex oxide–noble metal nanocomposites
大家应该也有点累了，稍作休息
大家有疑问的，可以询问和交流
1. LAL-based to fabricate carbon-encapsulated metal carbides
Tantalum target
pulse laser
acetone target
TaC@C NPs
Carbon, 2013, 55, 108–115
More products can be synthesized·····
Nb in ethonal
NbC@C
Mo in ethonal
MoxC@C
Co in acetone
Co3C@C
the formation process of carbon-encapsulated metal carbides
2. LAL-based synthesis of ternary oxides
J. Mater. Chem., 2012, 22, 17210–17214
Design for ternary oxides based on A + B = C
various ternary oxides
Morphology, structure and size can be modified…
Reaction temperature Reaction time pH value
3. LAL-based complex oxide–noble metal nanocomposites
Adv. Mater. 2013, 25, 2040–2044
Brief Summary
• LAL-generated NMs present unique activity, …beneficial for obtaining new properties and new structures
• LAL-generated NMs display unique reactivity …can be used as precursors for preparing new materials
• Laser-generated NMs show unique application …in catalyst, biosensor etc.
Basic mechanism of LAL(laser ablation in liquids)
Sketch of the main stages of LAL
Phys. Chem. Chem. Phys., 2013, 15 , 3027--3046
Basic mechanism of LAL
Sketch of the plasma plume formed by laser ablation of a metal target. * Denotes excited and/or ionized states
Phys. Chem. Chem. Phys., 2009, 11 , 3805–3821
Basic mechanism of LAL
FeO Nanoparticles by LAL
Adv. Funct. Mater. 2012, 22, 1333–1353
Nanoparticles Derived from LAL method
Ultra-small size distribution Metastable structure Unoccupied/charged surfaces
LALinduced
NPs
Quantum size effects New structures and properties Easy-functionalization
High activity and reactivity
Nanoparticles Synthesized by Chemical Routes
Capped with various stable reagents to prevent aggregation or reaction
Stable and surface passivated
Activity and Reactivity
A (assemble or growth) A + A
A AA
or A
A+B
A+ B
= C → New compounds
C
=AB → Composites
AB
Examples
1. LAL-based to fabricate carbon-encapsulated metal carbides 2. LAL-based synthesis of ternary oxides 3. LAL-based complex oxide–noble metal nanocomposites
大家应该也有点累了，稍作休息
大家有疑问的，可以询问和交流
1. LAL-based to fabricate carbon-encapsulated metal carbides
Tantalum target
pulse laser
acetone target
TaC@C NPs
Carbon, 2013, 55, 108–115
More products can be synthesized·····
Nb in ethonal
NbC@C
Mo in ethonal
MoxC@C
Co in acetone
Co3C@C
the formation process of carbon-encapsulated metal carbides
2. LAL-based synthesis of ternary oxides
J. Mater. Chem., 2012, 22, 17210–17214
Design for ternary oxides based on A + B = C
various ternary oxides
Morphology, structure and size can be modified…
Reaction temperature Reaction time pH value
3. LAL-based complex oxide–noble metal nanocomposites
Adv. Mater. 2013, 25, 2040–2044
Brief Summary
• LAL-generated NMs present unique activity, …beneficial for obtaining new properties and new structures
• LAL-generated NMs display unique reactivity …can be used as precursors for preparing new materials
• Laser-generated NMs show unique application …in catalyst, biosensor etc.