Physicochemical and catalytic characterization of non-hydrothermally synthesized Mg-, Ni- and Mg–Ni-saponite-like materials

Microwave synthesis of delaminated acid saponites using quaternary ammonium salt or polymer as template. Study of pH influence

“…1). This later reflection, which corresponds to 1.53 Å, is characteristic for trioctahedral clays such as saponites (Prihod'ko et al, 2004;Bisio et al, 2011).…”

Organic–Inorganic Hybrid Saponites Obtained by Intercalation of Titano‐Silsesquioxane

“…The XRD pattern of Na‐SAP sample (Figure 2 A, curve a) was characterized by three main reflections centered at 7.5° ( d spacing of 11.7 Å), 19.4° (4.57 Å), and 60.5° 2 θ (1.53 Å), owing to the (001), (110), and (060) planes of the layered saponite. In particular, the presence of the (060) reflection suggests that the material has a trioctahedral structure, as expected for saponite clay 26. The basal (001) reflections of the two saponites were not well defined, according to a lack of homogeneous organization of the lamellae in both solids 24.…”

“…24 The measured cation exchange capacity (CEC) of the produced solids was 59.7 meq/100 g 25. 26 Synthetic saponite clays were prepared by hydrothermal synthesis of a gel formed by mixing Al[OCH(CH 3 ) 2 ] 3 , NaOH, Mg(CH 3 COO) 2 , SiO 2 , and H 2 O (with a gel composition of 1 SiO 2 ; 0.834 Mg(CH 3 CO 2 ) 2 ; 0.113 Al[OCH(CH 3 ) 2 ] 3 ; 0.113 NaOH; 18.6 H 2 O) and exchanged by Na + and H + ions, according to procedures already described in the literature34, 35 and optimized in our laboratories 24. 25…”

Synthesis and characterization of high nickel-containing mesoporous silica via a modified direct synthesis method

“…Another peak appears at around 420 nm. These peaks get stronger with increasing amount of nickel incorporated and can be assigned to d-d transitions of Ni 2+ ions in octahedral or distorted octahedral coordinated environments, such as in NiO or nickel phyllosilicates [28][29][30][31][32][33]. Meanwhile, peak at 384 nm indicates the presence of bulk NiO particles [28,29].…”