Abstract
Mesoporous silicas have enjoyed great interest among scientists practically from the moment of their discovery thanks to their unique attractive properties. Many types of mesoporous silicas have been described in literature, the most thoroughly MCM-41 and SBA-15 ones. The focus of this review are the methods of syntheses, characterization and use of mesoporous silicas from SBA (Santa Barbara Amorphous) and HMM (Hybrid Mesoporous Materials) groups. The first group is represented by (i) SBA-1 of three-dimensional cubic structure and Pmn symmetry and (ii) SBA-2 of three-dimensional combined hexagonal and cubic structures and P63/mmc symmetry. The HMM group is represented by (i) HMM-1 of two-dimensional hexagonal structure and p6mm symmetry and (ii) HMM-2 of three-dimensional structure and P63/mmc symmetry. The paper provides comprehensive information on the above-mentioned silica materials available so far, also including the data for the silicas modified with metal ions or/and organic functional groups and examples of the materials applications.
Highlights
For almost 30 years, much attention has been paid to designing and obtaining new nanomaterials.The interest in such materials stems from the fact that they have at least one component of their structure on the nanoscale and show a number of unique properties and have a wide range of applications [1,2]
This paper presents the information on syntheses of SBA-1, SBA-2, Hybrid mesoporous materials (HMM)-1 and HMM-2 silicas, their physicochemical characterization and applications, from the time they have been for the first time obtained till the present, collected on the basis of literature
The paper presents the syntheses, physicochemical characterization and applications of SBA-1, SBA-2, HMM-1 and HMM-2 silicas based on literature peruse
Summary
For almost 30 years, much attention has been paid to designing and obtaining new nanomaterials. The synthesis of M41S materials has opened the way to obtaining new ordered mesoporous silicas [16]: SBA (Santa Barbara Amorphous), MSU (Michigan State University), FSM (Folded Sheet Materials), FDU (Fudan University) and KIT (Korean Advanced Institute of Science and Technology). They were synthesized by modifications of the earlier proposed method by addition of different compounds directing structural development [8,17]. This paper presents the information on syntheses of SBA-1, SBA-2, HMM-1 and HMM-2 silicas, their physicochemical characterization and applications, from the time they have been for the first time obtained till the present, collected on the basis of literature
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