In this work, mesoporous spherical γ-AlOOH and γ-Al2O3 particles were rapidly prepared by spray pyrolysis (SP) at different temperatures (400°C–700°C) without the use of template materials. A sol-gel-derived colloidal solution boehmite was ultrasonicated to generate fine droplets, which continuously transferred into a quartz reactor heated specific temperature constant flow N2 gas. Under ultras...

nowadays, the use of innovative nano-technology in the food industry quality control has significantly increased and it is widely employed in numerous fields such as diagnosis of microbial toxin of foods using nano-biosensors, increasing food shelf-life with the help of nano-clay and nano-silver packaging, as well as changing some of the unpleasant organoleptic properties such as taste, color, ...

Colloidal gels respond as soft solids at rest, whereas they flow liquids under external shear. Starting from a fluidized state an applied shear rate ${\stackrel{\ifmmode \dot{}\else \.{}\fi{}}{\ensuremath{\gamma}}}_{p}$, abrupt cessation triggers liquid-to-solid transition during which the stress relaxes towards so-called residual ${\ensuremath{\sigma}}_{\mathrm{res}}$ that tallies macroscopic ...

In this work, we study three aluminum oxides (alpha, gamma, boehmite) and various oxidized metallic powders to observe their dehydration decomposition behavior using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) scanning electron microscopy (SEM). We find that a temperature increase the (aluminas) reduces physically adsorbed water molecules reveal presence of hydr...