Sodium silicate as source of silica for synthesis of mesoporous SBA-15

International Conference on Innovative Research - ICIR Euroinvent 2016

Rahmat, Norhasyimi^1 ; Hamzah, Fazlena^1 ; Sahiron, Norsuraya^1 ; Mazlan, Marissa^1 ; Zahari, Muhammad Mukmin^1

Faculty of Chemical Engineering, Universiti Teknologi MARA, Shah Alam

40450, Malaysia^1

关键词: Amphiphilic block copolymers;    Fourier transform infrared;    Mesoporous;    Nitrogen adsorption desorption;    Ordered mesoporous silicas;    SBA-15;    Sodium silicate;    Structure directing agents;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/133/1/012011/pdf
DOI  :  10.1088/1757-899X/133/1/012011

来源: IOP

【 摘 要 】

Ordered mesoporous silica SBA-15 was prepared using hydrothermal synthesis using sodium silicate (Na2SiO3) as the silica source and amphiphilic block copolymer Pluronic P123 as the structure directing agent. The influence of the mass Na2SiO3, ripening duration, aging time and calcination temperature on the structural and mesoporous properties of silica was studied. X-ray diffraction (XRD), Fourier transform infrared (FTIR), Scanning electron microscopy (SEM) and the nitrogen adsorption desorption using Brunauer Emmett Teller (BET) are some instruments used to characterize the results of investigation. From XRD analysis, SBA-15 synthesized from sodium silicate yield 2D-hexagonal symmetry (p6mm). From FTIR analysis, functional group Si-O-Si symmetric stretching modes and asymmetric Si- O-Si stretching modes were present. The sample with the highest mass of Na2SiO3and the shortest aging time exhibited the largest surface area and large pore size. The results also showed the morphological structure could be tuned during ripening stage.