S. N. Aisyiyah Jenie, Anis Kristiani, Robert Ronal Widjaya, Yuni Kusumastuti, Pramesti Prihutami, Widi Astuti, Ferian Anggara, Shaimah Rinda Sari, Yudha Gusti Wibowo, Himawan Tri Bayu Murti Petrus
Silica nanomaterials derived from earth-abundant element – one of which is from geothermal powerplant waste, have become the focus of researchers and industries in recent years. Due to different synthetic conditions and chemical treatments, the adjustable morphology, structure, and surface chemistry, these sustainable nanomaterials offer vast applications. The possibility of producing silica nanomaterials from natural sources, such as waste and low-cost minerals, also accounts for their great prospect. This review reports various synthesis techniques and their effect on the physical properties of silica nanomaterials from geothermal sludge, in particular to that from Indonesia's geothermal powerplant. The surface chemistry section discusses the interface chemical properties which leads to various surface modifications. We further discuss the application of silica geothermal-based nanomaterials in a plethora of different fields, including forensic, sensing and biosensing, heterogeneous catalysts and constructions. The prospect of these materials and their circular economy analysis was also discussed. This review will provide necessary information for the advanced production of sustainable silica nanomaterials. © 2025 Elsevier Ltd
Research Centre of Chemistry, Research Organization of Nanotechnology and Materials, National Research and Innovation Agency (BRIN), Kawasan Sains dan Teknologi (KST) B. J. Habibie, Building 452, Serpong, Banten, Tangerang Selatan, 15314, Indonesia; Department of Chemical Engineering (Sustainable Mineral Processing Research Group), Universitas Gadjah Mada, Jl. Grafika No. 2, Kampus UGM, Yogyakarta, 55281, Indonesia; Research Center of Mining Technology, Research Organization of Nanotechnology and Materials, National Research and Innovation Agency (BRIN), Tanjung Bintang, Indonesia; Unconventional Georesources Research Center, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika No. 2, Kampus UGM, Yogyakarta, 55281, Indonesia; Sustainable Mining and Environmental Research Group, Department of Mining Engineering, Institut Teknologi Sumatera, Lampung, Indonesia; Center for Green and Sustainable Materials, Institut Teknologi Sumatera, Lampung, Indonesia