Synthesis of mesoporous silica with controlled pore structure frombagasse ash as a silica source

Rahman, Nanik Astuti and Widhiana, Ika and Juliastuti, Sri Rachmania and Setyawan, Heru (2015) Synthesis of mesoporous silica with controlled pore structure frombagasse ash as a silica source. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 476. pp. 1-7. ISSN 0927-7757

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Abstract

Mesoporous silica with controlled pore structure was prepared from bagasse ash as a silica source. Thesilica in the bagasse ash was dissolved by NaOH solution to produce sodium silicate precursor for themesoporous silica, with or without polyethylene glycol (PEG) template. Without the PEG template, thepore structure was greatly influenced by the pH and the presence of Na+ions. The porous silica produced inthe presence of Na+possessed higher surface area and pore diameter than those produced in the absenceof Na+. The surface area and pore diameter reached approximately 525 m2g−1and 18 nm, respectively,when the gelation pH was 3. When the gelation pH was increased, the surface area decreased while thepore diameter increased. The use of PEG template increased significantly the surface area, which reachedapproximately 656 m2g−1when the template was removed by solvothermal extraction. Calcination athigh temperature caused a densification of pore structure resulting a smaller surface area, pore diameterand pore volume. The pore diameter for all cases was greater than 4 nm, indicating that the silicas weremesoporous.

Item Type:	Article
Uncontrolled Keywords:	Bagasse ash, Mesoporous silica, Sodium silicate,PEG template, Silica-PEG hybrida
Subjects:	Engineering > Chemical Engineering
Divisions:	Fakultas Teknologi Industri > Teknik Kimia S1
Depositing User:	Mr Sayekti Aditya Endra
Date Deposited:	19 May 2020 09:18
Last Modified:	26 Dec 2022 06:32
URI:	http://eprints.itn.ac.id/id/eprint/4814

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