Synthesis of titania modified silica-pillared clay (SPC) with highly ordered interlayered mesoporous structure for removing toxic metal ion Cr(VI) from aqueous state

Fe/Ti co-pillared clay for enhanced arsenite removal and photo oxidation under UV irradiation

“…Liu et al [17] discovered that Ag/Ti co-pillared MMT had better photocatalytic performance than titanium pillared MMT. Mao et al [18] found that titania modified silica pillared clay performed better than silica pillared MMT in removing toxic metal Cr(VI) from aqueous state. Mirshra and Parida found that iron-chromium mixed oxide pillared clay showed enhanced catalytic activity for methanol conversion [19].…”

Restructuring of silica-pillared clay (SPC) through posthydrothermal treatment and application as phosphotungstic acid supports for cyclohexene oxidation

“…Recently, the synthesis of silica-pillared clay (SPC) with ordered mesoporous structure materials using non-preswelling method was reported [22][23][24]. Mesoporous SPC with ordered nanopores and large surface areas has been employed as catalyst supports [25], absorbents materials [26,27], and magnetic drug release system [28]. The interlayered porous structure of synthesized silica-pillared clay (SPC) materials could be controlled by cationic surfactants with different length of carbon chain [23], cationic-cationic or cationic-anionic mixed surfactants [22,28].…”

Hierarchical porous nano-MFI zeolite-pillared montmorillonite clay synthesized by recrystallization for hydrocracking of residual oil

“…2D marked by arrows) as the recrystallization time was prolonged to 4d. Moreover, when MPC-5 was synthesized by recrystallization of SPC for 5d, more regularly distributed nano-MFI zeolite particles about 10 nm in 25 size can be observed between the lamellae of MMT (Fig. 2E).…”

“…4. The ZSM-5 sample showed a type I adsorption isotherm, in which the adsorption amount was 25 saturated in an extremely low relative pressure region (P/P 0 < 0.05) as a result of monolayer adsorption of N 2 inside the micropores. SPC shows a type IV isotherm with adsorption hysteresis (H3), which is characteristic of a slit-type mesoporous structure.…”

“…4-8 Mesoporous aluminosilicate materials with various structures have been synthesized since the 1990s, following the synthesis of MCM-41 using surfactant micelles as templates. 9,10 However, such mesoporous materials are composed of amorphous frameworks and have insufficient acidity for most 25 petrochemical reactions. 11,12 In recent years, a variety of methods-such as direct synthesis using different templating strategies, generation of mesopores in zeolite single crystals by post-synthesis treatment, zeolitization of mesoporous materials and recrystallization of zeolites-have been suggested as 30 strategies for the synthesis of mesoporous materials having crystalline nanozeolitic micropore walls.…”