Nanopowders of metallic oxides prepared by the hydrolytic route with starch stabilization and biological abetment.
Sn, Sn-Sb, Ti, Zr, Fe, Ce and In oxides are prepared as nanometric powders by the hydrolytic route, starting from their ordinary salts or alkoxides, in the presence of 5% w/v starch as a non-ionic stabilizer of crystallization nuclei versus coalescence and flocculation. The starch can be degraded by a-amylase to soluble glucosidic oligomers, which may further be degraded by yeast to CO2 and ethanol. The nanoparticle features of prepared oxides result from experimental evidence based on X-ray diffractometry, transmission electron microscopy, differential thermal analysis/thermogravimetry coupled to mass spectrometry, specific surface area and porosity of samples obtained by curing in the 80-600 degrees C interval.
Department of Materials Engineering and Industrial Technologies, University of Trento, via Mesiano 77, 38050 Trento, Italy.
Emanuela
E
Callone
Giovanni
G
Carturan
Adriana
A
Sicurelli
D002712:Chlorides; D006868:Hydrolysis; D008670:Metals / Q000737:chemistry*; D008854:Microscopy, Electron; D049329:Nanostructures / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D011208:Powders; D012492:Salts; D013213:Starch / Q000737:chemistry*; D014783:Viscosity; D014961:X-Ray Diffraction
D002712:Chlorides; D008670:Metals; D010087:Oxides; D011208:Powders; D012492:Salts; D013213:Starch