Preparation, extraction and characterization of nanosized materials from treated rice husk ash and their environmental applications

Abstract

Nano silica from rice husk ash has attracted developing interest due to its specific structure and various properties. It has promising applications in the fields of industrial catalysis and green chemistry areas as wastewater treatment. SiO2 extracted has been used as an adsorbent material. SiO2 nanomaterials were synthesized using five different methods. Precipitation method (SiOP) which calcined at 500°C for 3h, precipitation method from rice husk ash (SiORHA), combustion method from rice husk ash (SiOC), sol-gel method (SiOSG) which calcined at 500 °C for 3h, and finally (SiOCTAB) which was prepared by surfactant-assisted sol-gel method which calcined at 600 °C for 2h. All synthesized nanomaterials were used as adsorbents in order to remove organic dye (methylene blue MB) from wastewater. The prepared catalysts were characterized by XRD, FT-IR, SBET, and TEM while the obtained (SiOC) was characterized by SEM tool too.