“…Then attraction of other scientists to this materials caused discovery of other types of nanoporous materials such as SBA-15 (Zhao et al, 1998), LUS-1 (Bonneviot et al, 2003), FSM-16 (Inagaki et al, 1993), KIT-1 (Ryoo et al, 1996), MSU (Bagshaw et al, 1995), and HSM (Tanev & Pinnavaia, 1995)which were synthesized within highly acidic to strongly basic pH range using cationic, anionic, neutral and nonionic structure directing agents. Among these materials, MCM-41, LUS-1 and SBA-15 are most studied ones in our previous researches such as studies on metal modification Béland et al, 1998), pre-concentration of metals (Ganjali et al, 2006;Javanbakht et al, 2009b;Javanbakht et al, 2010), modification with 8-hydroxyquinoline (Badiei et al, 2011b;Badiei et al, 2011a), carbon paste electrodes (Ganjali et al, 2010;Javanbakht et al, 2007a;Javanbakht et al, 2007b;Javanbakht et al, 2009a), solid phase micro extraction (Hashemi et al, 2009) and hydroxylation catalysts (Arab et al). Therefore, these materials are the major subject in the coming discussions about catalytic synthesis of CNTs.…”