Synthesis of nanosilica obtained from sugarcane bagasse ash

Reference Presenter Authors
17-058 Elisângela Guzi de Moraes Falk, G.S.(Federal University of Santa Catarina); Novaes de Oliveira, A.P.(Universidade Federal de Santa Catarina); Guzi de Moraes, E.(Universidade Federal de Santa Catarina); Maykot, C.K.(Universidade Federal de Santa Catarina); Teixeira, L.B.(Universidade Federal de Santa Catarina); Nanoparticles of SiO2 were synthesized via sol-gel route using sugarcane bagasse ash (SCBA) as a silica source. The influence of the synthesis’ operational conditions, as well as, the use of different purification methods, such as thermochemical treatments, on morphological, structural and chemical properties of the synthesized nanoparticles were evaluated. The results showed that the sol-gel synthesis is a feasible alternative method for obtaining mesoporous silica xerogels. Amorphous SiO2 nanoparticles with an average size of ~10 nm were obtained by controlling the main variables of the synthesis (pH, temperature and SiO2/H2O molar ratio). The purification methods investigated allowed to obtain nanosilica with different levels of purity, greater than 95%. The combined morphological features, such as large specific surface and pore volume, allow these materials to be used in several scientific and technological fields, where high purity levels and textural properties are required.
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