| Abstract
| - Nanocrystalline mesoporous SnO2 materials, prepared by the sol−gel method from bis(2-methylbutan-2-oxy)di(pentan-2,4-dionato)tin, consist of a porous network of aggregated nanocrystallites with a mesoporosity arising from the interparticle space. A careful tuning of both hydrolysis ratio and calcination temperature led to materials of SBET ranging from 50 to 150 m2·g-1 and with an average pore size from 45 to 100 Å.
- Nanocrystalline mesoporous tin dioxide materials have been obtained through thecontrolled hydrolysis of bis(2-methylbutan-2-oxy)di(pentan-2,4-dionato)tin followed by athermal treatment at 400−550 °C. These materials have been carefully characterized byelemental analysis, FTIR, TGA-MS, XRD, MET, N2 adsorption, and thermoporometry. Theyare composed of a porous network of aggregated nanoparticles with a mesoporosity arisingfrom the interparticle space. A careful tuning of both hydrolysis ratio and calcinationtemperature allowed the preparation of powders with Brunauer−Emmett−Teller surfaceareas ranging from 50 to 150 m2·g-1, an average pore size between 45 and 100 Å, and amean particle size ranging from 60 to 180 Å. The higher hydrolysis ratio favored the formationof mesoporous solids with high surface areas and low mean pore size diameter. The powdersprepared at 550 °C might be advantageously used as semiconducting oxide materials indye-sensitized photovoltaic devices.
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