Details
| Original language | English |
|---|---|
| Pages (from-to) | 270-276 |
| Number of pages | 7 |
| Journal | Materials and design |
| Volume | 119 |
| Publication status | Published - 5 Apr 2017 |
Abstract
Despite the enormous interest in the properties and applications of porous silica matrix, only a few attempts have been reported to deposit metal and metal oxide nanoparticles (NPs) inside the porous silica matrix. We report a simple approach (i.e. sol-gel hot injection) for insitu synthesis of ZnO NPs inside a porous silica matrix. Control of the Zn:Si molar ratio, reaction temperature, pH value, and annealing temperature permits formation of ZnO NPs (≤ 10 nm) inside a porous silica particles, without additives or organic solvents. Results revealed that a solid state reaction inside the ZnO/SiO 2 nanocomposites occurs with increasing the annealing temperature. The reaction of ZnO NPs with SiO 2 matrix was insignificant up to approximately 500 °C. However, ZnO NPs react strongly with the silica matrix when the nanocomposites are annealed at temperatures above 700 °C. Extensive annealing of the ZnO/SiO 2 nanocomposite at 900 °C yields 3D structures made of 500 nm rod-like, 5–7 μm tube-like and 3–5 μm needle-like Zn 2SiO 4 crystals. A possible mechanism for forming ZnO NPs inside porous silica matrix and phase transformation of the ZnO/SiO 2 nanocomposites into 3D architectures of Zn 2SiO 4 are carefully discussed.
Keywords
- Architectured nanostructures, Nanocomposite, Porous silica matrix, Sol-gel hot injection, Zinc oxide nanoparticles, Zinc silicate
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Materials and design, Vol. 119, 05.04.2017, p. 270-276.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Sol-gel hot injection synthesis of ZnO nanoparticles into a porous silica matrix and reaction mechanism
AU - Barhoum, A.
AU - Van Assche, G.
AU - Rahier, H.
AU - Fleisch, M.
AU - Bals, S.
AU - Delplancked, M.-P.
AU - Leroux, F.
AU - Bahnemann, D.
N1 - Publisher Copyright: © 2017 Elsevier Ltd Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/4/5
Y1 - 2017/4/5
N2 - Despite the enormous interest in the properties and applications of porous silica matrix, only a few attempts have been reported to deposit metal and metal oxide nanoparticles (NPs) inside the porous silica matrix. We report a simple approach (i.e. sol-gel hot injection) for insitu synthesis of ZnO NPs inside a porous silica matrix. Control of the Zn:Si molar ratio, reaction temperature, pH value, and annealing temperature permits formation of ZnO NPs (≤ 10 nm) inside a porous silica particles, without additives or organic solvents. Results revealed that a solid state reaction inside the ZnO/SiO 2 nanocomposites occurs with increasing the annealing temperature. The reaction of ZnO NPs with SiO 2 matrix was insignificant up to approximately 500 °C. However, ZnO NPs react strongly with the silica matrix when the nanocomposites are annealed at temperatures above 700 °C. Extensive annealing of the ZnO/SiO 2 nanocomposite at 900 °C yields 3D structures made of 500 nm rod-like, 5–7 μm tube-like and 3–5 μm needle-like Zn 2SiO 4 crystals. A possible mechanism for forming ZnO NPs inside porous silica matrix and phase transformation of the ZnO/SiO 2 nanocomposites into 3D architectures of Zn 2SiO 4 are carefully discussed.
AB - Despite the enormous interest in the properties and applications of porous silica matrix, only a few attempts have been reported to deposit metal and metal oxide nanoparticles (NPs) inside the porous silica matrix. We report a simple approach (i.e. sol-gel hot injection) for insitu synthesis of ZnO NPs inside a porous silica matrix. Control of the Zn:Si molar ratio, reaction temperature, pH value, and annealing temperature permits formation of ZnO NPs (≤ 10 nm) inside a porous silica particles, without additives or organic solvents. Results revealed that a solid state reaction inside the ZnO/SiO 2 nanocomposites occurs with increasing the annealing temperature. The reaction of ZnO NPs with SiO 2 matrix was insignificant up to approximately 500 °C. However, ZnO NPs react strongly with the silica matrix when the nanocomposites are annealed at temperatures above 700 °C. Extensive annealing of the ZnO/SiO 2 nanocomposite at 900 °C yields 3D structures made of 500 nm rod-like, 5–7 μm tube-like and 3–5 μm needle-like Zn 2SiO 4 crystals. A possible mechanism for forming ZnO NPs inside porous silica matrix and phase transformation of the ZnO/SiO 2 nanocomposites into 3D architectures of Zn 2SiO 4 are carefully discussed.
KW - Architectured nanostructures
KW - Nanocomposite
KW - Porous silica matrix
KW - Sol-gel hot injection
KW - Zinc oxide nanoparticles
KW - Zinc silicate
UR - http://www.scopus.com/inward/record.url?scp=85010878169&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2017.01.059
DO - 10.1016/j.matdes.2017.01.059
M3 - Article
VL - 119
SP - 270
EP - 276
JO - Materials and design
JF - Materials and design
SN - 0264-1275
ER -