Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 1, Pages 416-423Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.09.193
Keywords
Geopolymer; Mesopores; Metakaolin; Rice husk ash; Adsorption
Categories
Funding
- CAPES (Coordination for the Improvement of Higher Education Personnel)
- CNPq (National Council for Scientific and Technological Development)
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In this work, mesoporous geopolymer was synthesized using a novel and easy synthesis route employing metakaolin and rice husk ash as sources of silica and alumina, and soybean oil as a mesostructure-directing agent. For comparison purposes, a geopolymer sample was produced without the use of oil. The samples were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), specific surface area, pore volume, average pore size, and pore size distribution (BET and BJH methods). The materials were tested to remove methyl violet 10B dye from aqueous solutions. The results showed that the mesoporous geopolymer presented adsorptive superior behavior compared to the geopolymer prepared without the use of oil, being attributed to its superior pore properties. The adsorption equilibrium was attained within 120 min, and the maximum adsorption capacity of mesoporous geopolymer was 276.9 mg g(-1). Therefore, the mesoporous geopolymer prepared in this work comprises a potential adsorbent, presenting pore intrinsic properties that result in a high adsorption capacity.
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