Synthesis and Catalytic Performance of Al-MCM-48 and Ti-MCM-48

Mesoporous sieves MCM-48 with hetero atom were synthesized by adding aluminum and titanium sources through hydrothermal method. The results showed that MCM-48 could be synthesized respectively by adjusting exactly the alkalinity of synthesis gel. The conversion rate of DIPB on Al-MCM-48 increased to 80% after 9 h and the selectivity of IPB was 97%. The conversion rate of styrene on Ti-MCM-48 increased to 9% after 8 h and the selectivity of benzaldehyde was 85%. The available active sites, which were introduced by aluminum and titanium atoms, were effectively utilized for catalyst reaction due to the presence of mesopores in Al-MCM-48 and Ti-MCM-48.

Preparation of Al-MCM-48 and Ti-MCM-48

In system of cetyltrimethylammonium bromide (CTAB), tetraethyl orthosilicate (TEOS) and sodium hydroxide, the mesoporous sieves MCM-48 with hetero atom could be synthesized by adding different aluminum and titanium sources. The results showed that M41S family of hexagonal (MCM-41), cubic (MCM-48) and lamellar phase (MCM-50) could be synthesized respectively through hydrothermal method by adjusting the alkalinity in synthesis gel exactly.

From macropore to mesopore: diatomite reassembled into a multifunctional composite

A ‘dissolving first and then reassembling’ way was presented for preparing an SN@SiO2 composite by the hybridization of an antistatic agent SN with diatomite. The colored antistatic agent was prepared by binding of the composite with a sulfonic dye. Also, it captured nonylphenol from wastewater, and the waste sludge produced was calcined to form mesoporous sieves.