“…Some precursors applied in the synthesis of chitosan/silica hybrid materials have been 3-glycidoxypropyltrimethoxysilane [21,22], 3-aminopropyltriethoxysilane, tetramethylorthosilicate [23,24] sodium silicate [25] and tetraethylorthosilicate (TEOS) [26][27]. The morphological and textural properties are very influenced by these precursors that can produce scaffold [21,22] spherical [21,25,28], and also compact structures [23]. These materials can present varied porosities with pores of different sizes and shapes [23,25].…”