Download - 한양대 공업화학과 무기소재연구실 하 회 진
한양대 공업화학과무기소재연구실
하 회 진
INORGANIC / ORGANIC/POLYMERIC
NANOCOMPOSITES
INORGANIC / ORGANIC/POLYMERIC
NANOCOMPOSITES
Inorganic Material Lab.Inorganic Material Lab.
Inorganic Material Lab.Inorganic Material Lab.
TYPES OF NANOCOMPOSITE
Types Examples
Low temperature sol-gel derived nanocomposites Mullite/SiO2; Al2O3/SiO2; SiO2/MgO ...
Structural ceramic nanocomposites Al2O3/SiC; Si3N4/SiC ...
Glass ceramic: glass/metal nanocomposites Photosensitive glasses
Electroceramic nanocomposites Co/Cr
Nanocomposites films nanocomposites Lead zirconate titanate (PZT)/nickel
Entrapment-type Zeolite/metallic or organic complex
Layered nanocomposites Pillared clays
Metal/ceramic nanocomposites Fe Cr/Al2O3; Ni/Al2O3
Organoceramic nanocomposites Polymeric matrix/PbTiO3
Inorganic Material Lab.Inorganic Material Lab.
CONTENTS
Nanoparticles by ultrasound - Molybdenum oxide-, molybdenum carbide-silica & zinc sulfide-silica
Pillared layered nanocomposites - Vanadium pentoxide doped aluminium oxide pillared clays (VAPCs) & p-toluenesu
lfonic acid doped aluminium oxide pillared clays (TSPCs)
Encapsulation nanoparticles by two-step process
- Silica-magnetite/maghemite
Nanoclusters in block copolymer films (nanoreactor) - NORCOOH method, NORCOONa method, ring-opening metathesis polymerization
(ROMP)
Molecular imprinting - Surface molecular imprinted polymer
Sonochemical synthesis
SystemMOS composite
2Mo(CO)6 + 17/2 O2 → Mo2O5(s) + 2CO2(g)
Mo2O5 + SiO2 → Mo2O5-SiO2
--------------------------------- 2Mo(CO)6 + SiO2 + 17/2 O2 → Mo2O5-SiO2(s) + 12CO2(g)
MCS composite
2Mo(CO)6 → 2Mo(s) + 12CO(g)
2CO → C(s) + CO2(g)
2Mo + C → Mo2C(s)
Mo2C + SiO2 → Mo2C-SiO2(s)-------------------------------
2Mo(CO)6 + SiO2 → Mo2C-SiO2(s) + CO2(g) + 10CO(g)
MOS(Molybdenum Oxide-Silica)Sonication for 3h, Mo(CO)6, silica in decane under ambient air
MOS(Molybdenum Oxide-Silica)Sonication for 3h, Mo(CO)6, silica in decane under ambient air
MCS(Molybdenum Carbide-Silica)Sonication for 3h, Mo(CO)6, silica in decane under argon
MCS(Molybdenum Carbide-Silica)Sonication for 3h, Mo(CO)6, silica in decane under argon
- Decomposition of the precursor into the required coating phase- Breaking of the strained siloxane link of the silica- Colliding with each other and depositing
N. A. Dhas and A. Gedanken, Chem. Mater., 1997, 9, 3144 N. A. Dhas, A. Zaban, and A. Gedanken, Chem. Mater., 1999, 11, 806
Inorganic Material Lab.Inorganic Material Lab.
System ZnS Formation
H2O ))))) H + OH
2H + RS → H2S + R (RS = thioacetamide)
H2S + Zn(Ac)2 → ZnS + 2AcH
ZSS (ZnS-SiO2)Sonication for 3h, Zn(ac)6, SiO2,TA(thioacetamide, MeCSNH2) in waterunder ambient air
ZSS (ZnS-SiO2)Sonication for 3h, Zn(ac)6, SiO2,TA(thioacetamide, MeCSNH2) in waterunder ambient air
Inorganic Material Lab.Inorganic Material Lab.
Sonochemistry
Formation, growth, & Implosive collapse of bubbles in liq.→ hot spots (~5000K, 18
00 atm, cooling rates 108 K/s)
REACTIVITIES
Oxidation (alcohol→carbonyl) : benzyl alcohol to benzaldehyde
Synthesis of methyl tert-butyl ether (MTBE) and bisphenol A
with oxidantor strong acid
character
J. Wang, J. Merino, P. Aranda, J.-C. Galvan and E. R.-Hitzky, J. Mater. Chem., 1999, 9, 161
V2O5 orp-toluenesulfonic acid
Pillaredclays
Porousmaterials
ADVANTAGES
VAPCs easily prepared, not expensive, easily separated and recovered after rexn., good thermal stabilityTSPCs excellent catalytic activity and good selectivity
Inorganic Material Lab.Inorganic Material Lab.