Inorganic and Hybrid Organic-Inorganic Materials for Energy Saving LABORATORIO DI SINTESI DI MATERIALI INORGANICI Massimiliano D’Arienzo Barbara Di Cr...
Types of Inorganic-Organic Hybrid Materials by Sol-Gel Processing Class I materials: weak interactions Class II materials: strong interactions
IN SOL-GEL CHEMISTRY Marc Henry 1. Introduction , 2. Sol-Gel Chemistry and Molecular Tectonics of Inorganic Compounds 3 ... Supramolecular Organic Assemblies as an Ordering Principle for Porous Silica 2.3. Validity of the Templating Concept for Other
similar to the cation-insertion mechanism found for other organic- ... electrode kinetics. The cycles shown in Fig. 3 and 4 show some relevant features
Amorphous Inorganic Materials and Glasses VCH ... 3.2.1 Boron Oxide, ... 3.2.1.3 Phosphorus Sulphides and Phosphorus Selenides 201
3. Inorganic Functional Materials 3.1. ... 1% Green pigment . Me. I [Fe. II. Fe. III ... 3.1.3 Production and Synthesis TiO 2 . Occurence in nature FeTiO 3 Ilmenite
Bio-inorganic Hybrid Nanomaterials Strategies, Syntheses, Characterization and Applications Edited by Eduardo Ruiz-Hitzky, Katsuhiko Ariga and Yuri Lvov
Inorganic and Hybrid Organic-Inorganic Materials
for Energy Saving 2 0
n m
LABORATORIO DI SINTESI DI MATERIALI INORGANICI
Massimiliano D’Arienzo Barbara Di Credico Roberto Scotti
2 0
n m
2 0
n m
0 .2
µ m
0 .2
µ m
5 0
n m
2 0
n m
5
n m
1 0
2 0 0
n m
2 0 0
n m
n m
Argomenti di tesi
Oxide nanomaterials for photocatalytic applications and gas sensing
Role of the Structure, Size and Morphology in
Upgrading the Functional Properties and the Technological applications of Oxide Materials
In collaboration with Pirelli Tyre
New nanofillers for rubber reinforcement in tires
Polymeric hybrid materials with dielectric properties 2
Struttura della tesi
Structural & Morphological characterization
• Functional properties
• Electronic and magnetic properties
Synthesis of the material Functional characterization
Oxide nanomaterials for Photocatalytic application and sensing
Synthesis
Characterizations XRD diffraction, SEM & TEM microscopy Surface area
Functional properties & Applications
Shape-controlled TiO2
Solvothermal synthesis
NOx abatement in air Organic pollutant in water
Sol-gel synthesis
New nanofillers for rubber reinforcement in tires
Synthesis In-situ and ex-situ synthesis (sol-gel, hydrothermal)
•Silica based nanofiller-latex composites for green tyres compounds Layered silicates in latex natural rubber
TEM
•Synthesis of ZnO decorated silica NPs as activator for rubber vulcanization c)
b)
ZnO curing additives
SiO2 100 nm
+
100 nm
e)
S8
f) d =0.26 nm
heating 5
2 0
n m
5
n m
n m
rubber
Polymeric hybrid materials with dielectric properties Advanced “molecular” fillers for rubber reinforcement Nanocomposites enclosing PSQs with controlled cage-like or ladder-like structure and reactive functionalities (thiol or methacryl groups), which enable to modulate both the dielectric and the reinforcement properties of the composites
POSS/ladder-like nanounits with tailored structure and highly reactive functional groups (-SH or methacryl)
7
Other characterization techniques available Nitrogen Physisorption
TGA-MS
Thermal decomposition and weight loss
Determination of the specific surface area (BET) Pore size distribution (BJH) 40 35
0,0025 0,0020
3
-1
30
3
-1
Volume adsorbed STP (cm g )
-1
Pore volume / (cm g nm )
0,0030
25 20
0,0015 0,0010 0,0005 0,0000 0
15
10 20 Pore diameter / nm
30
10 5 0 0,0
0,2
0,4
0,6
Relative pressure (P/P0)
0,8
1,0
Proprietà elettroniche e magnetiche: Spettroscopia ESR TiO2
SnO2
TiO2 + h → e-CB + h+VB
Vo Vo + e-
Ti4+ + e-CB → Ti3+
2 O2 + VO + e- 2 O2-
O2- + h+VB → OTi3+
O-
• The R=100%
A=39% R=61%
type, abundance and stability of the paramagnetic centers are relatable to photocatalytic efficacy and to the sensing properties
