Rice husk waste into various template-engineered mesoporous silica materials for different applications: A comprehensive review on recent developments

Amanuel Gidey Gebretatios, Abdul Rasheed Kadiri Kanakka Pillantakath, Thongthai Witoon, Jun Wei Lim, Fawzi Banat, Chin Kui Cheng

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Following the discovery of Stöber silica, the realm of morphology-controlled mesoporous silica nanomaterials like MCM-41, SBA-15, and KCC-1 has been expanded. Due to their high BET surface area, tunable pores, easiness of functionalization, and excellent thermal and chemical stability, these materials take part a vital role in the advancement of techniques and technologies for tackling the world's largest challenges in the area of water and the environment, energy storage, and biotechnology. Synthesizing these materials with excellent physicochemical properties from cost-efficient biomass wastes is a foremost model of sustainability. Particularly, SiO2 with a purity >98% can be obtained from rice husk (RH), one of the most abundant biomass wastes, and can be template engineered into various forms of mesoporous silica materials in an economic and eco-friendly way. Hence, this review initially gives insight into why to valorize RH into value-added silica materials. Then the thermal, chemical, hydrothermal, and biological methods of high-quality silica extraction from RH and the principles of synthesis of mesoporous and fibrous mesoporous silica materials like SBA-15, MCM-41, MSNs, and KCC-1 are comprehensively discussed. The potential applications of rice husk-derived mesoporous silica materials in catalysis, drug delivery, energy, adsorption, and environmental remediation are explored. Finally, the conclusion and the future outlook are briefly highlighted.

Original languageBritish English
Article number136843
JournalChemosphere
Volume310
DOIs
StatePublished - Jan 2023

Keywords

  • Mesoporous silica
  • Rice husk
  • Rice husk ash
  • Silica
  • Sustainability
  • Template-engineered silica

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