Nanocrystalline Titania Coated Metakaolin and Rice Hull Ash Based Geopolymer Spheres for Photocatalytic Degradation of Dyes in Wastewater
journal contribution
posted on 2025-04-13, 23:07authored byPatricia Isabel Bravo, Eiza Shimizu, Roy MalenabRoy Malenab, April Anne Tigue, Kimmie Mae Dela Cerna, Jose Isagani Janairo, Michael Angelo Promentilla, Derrick Ethelbhert Yu
Geopolymer spheres made from metakaolin and rice hull ash have exceptional chemical and mechanical stability, making them promising catalyst support matrix for photoactive compounds. In this paper, titania was deposited on geopolymer sphere via horizontal vapor phase growth method, which produced nanotitania crystals embedded on the surface. The titania-coated geopolymer spheres resulted in 90% dye photodegradation activity that can be used repeatedly, thus qualifying the products as sustainable materials for wastewater treatment.