Porous clay heterostructures: A new inorganic host for 5-fluorouracil encapsulation

Synthesis, Characterization, Uses and Applications of Porous Clays Heterostructures: A Review

“…The incorporation of surfactant and co‐surfactant to form the organoclay leads to the arising of bands located at 2800–2970 cm −1 ascribed to asymmetric and symmetric C−H stretching, while the bands located about 1450–1520 cm −1 are attributed to CH 3 −N− and CH 2 −C− bending modes. The incorporation of silica in the pillars implies the formation of a broader and more intense band located between 1000 and 1300 cm −1 , attributed to the asymmetric stretching of Si−O associated with a tridimensional silica network ,,. The calcination of the surfactant and co‐surfactant causes the loss of the bands located at 2800–2970 cm −1 and 1450–1520 cm −1 .…”

“…On the other hand, some authors have pointed out the arising of a new band located at 3740 cm −1 attributed to isolated Si−OH stretching groups ascribed to the silica pillars . Finally, the Si−O band is shifted at higher wavenumber values by the incorporation of amorphous silica in the pillars ,,…”

Evaluation of porous clay heterostructures modified with amine species as adsorbent for the CO2 capture

“…PCHs have been previously evaluated as adsorbent of small hydrocarbons [27,28], in separation of hydrocarbons [29] or in the encapsulation of organic compounds [30].…”

A new insight into the compositional and structural control of porous clay heterostructures from the perspective of NMR and TEM

“…PCHs are a member of pillared interlayer clay (PILC) that are characterized by the rare pore size distributions (PSD) in the range of supermicropore to small mesopore. Their unique structural characteristics give PCHs potential applications as adsorbents [2e4], catalysts [5e8], carriers [9,10], and templates [11e13]. Meanwhile, a huge amount of tetraethylorthosilicate (TEOS) loaded onto a clay host affects the process of pore formation within the interlayer and chemical compositions of the final products.…”