Haskouri, Jamal El and Dallali, Lobna and Fernández, Lorenzo and Garro, Nuría and Jaziri, Sihem and Latorre, Julio and Guillem, Carmen and Beltrán, Aurelio and Beltrán, Daniel and Amorós, Pedro (2009) ZnO nanoparticles embedded in UVM-7-like mesoporous silica materials: Synthesis and characterization. Physica E: Low-dimensional Systems and Nanostructures, 42 (1). 25 - 31.
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Official URL: http://www.sciencedirect.com/science/article/B6VMT...
ZnO nanodomains embedded in bimodal mesoporous silica (UVM-7) materials with high Zn content (4≤Si/Zn≤30) have been synthesized by an one-pot surfactant-assisted procedure from a hydro alcoholic medium using a cationic surfactant (CTMABr=cetyltrimethylammonium bromide) as structural directing agent, and starting from molecular atrane complexes of Zn and Si as hydrolytic inorganic precursors. This chemical procedure allows optimizing the dispersion of the ZnO particles in the silica walls. The bimodal mesoporous nature of the final high surface area nano-sized materials is confirmed by XRD, TEM, and N2 adsorption–desorption isotherms. The small intra-particle mesopore system is due to the supramolecular templating effect of the surfactant, while the large pores have their origin in the packing voids generated by aggregation of the primary nanometric mesoporous particles. A limited pore blocking and a high accessibility to the ZnO active nanoparticles have been achieved. The effects induced by the progressive incorporation of ZnO nanoparticles into the mesostructure have been examined, including a careful optical spectroscopic study (PL and UV–visible).
|Uncontrolled Keywords:||ZnO nanoparticles; Bimodal mesoporous materials; Atrane complexes; Spectroscopic studies|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
|Deposited On:||04 May 2010 12:32|
|Last Modified:||04 May 2010 12:32|
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