TY - JOUR

T1 - Sustainable Harnessing of SiO2 Nanoparticles from Rice Husks

T2 - A Review of the Best Synthesis and Applications

AU - Rodriguez-Otero, Alba

AU - Vargas, Vicmary

AU - Galarneau, Anne

AU - Castillo, Jimmy

AU - Christensen, Jan H.

AU - Bouyssiere, Brice

N1 - Funding Information: This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 945416. Publisher Copyright: © 2023 by the authors.

PY - 2023

Y1 - 2023

N2 - The extraction of silica particles from rice husks has been extensively studied. This review aims to present the most efficient approach to harnessing rice husk biomass and converting silica into high-value-added materials for direct applications to address current challenges like water purification. Rice husks, as a residue from agriculture, had been largely used as a source of power through direct incineration in major rice-producing countries. However, rice husks present an intriguing opportunity as a renewable source of SiO2, offering a low-cost adsorbent with a high surface area and ease of functionalization that can be transformed into diverse mesoporous silica structures or composites, enabling applications in catalysis, drug delivery, water treatment, etc. This dual potential of rice husks can be harnessed by combining bio-oil and syngas production through pyrolysis with the efficient extraction of SiO2, ensuring the comprehensive utilization of the biomass. This review not only highlights the immense potential of silica nanoparticles but also serves as a roadmap for future investigations, with the ultimate aim of harnessing the full capabilities of this renewable and sustainable resource, contributing to the circular economy by yielding valuable by-products.

AB - The extraction of silica particles from rice husks has been extensively studied. This review aims to present the most efficient approach to harnessing rice husk biomass and converting silica into high-value-added materials for direct applications to address current challenges like water purification. Rice husks, as a residue from agriculture, had been largely used as a source of power through direct incineration in major rice-producing countries. However, rice husks present an intriguing opportunity as a renewable source of SiO2, offering a low-cost adsorbent with a high surface area and ease of functionalization that can be transformed into diverse mesoporous silica structures or composites, enabling applications in catalysis, drug delivery, water treatment, etc. This dual potential of rice husks can be harnessed by combining bio-oil and syngas production through pyrolysis with the efficient extraction of SiO2, ensuring the comprehensive utilization of the biomass. This review not only highlights the immense potential of silica nanoparticles but also serves as a roadmap for future investigations, with the ultimate aim of harnessing the full capabilities of this renewable and sustainable resource, contributing to the circular economy by yielding valuable by-products.

KW - bio-oil

KW - biomass

KW - circular economy

KW - pyrolysis

KW - rice husk

KW - SiO nanoparticles

U2 - 10.3390/pr11123373

DO - 10.3390/pr11123373

M3 - Review

AN - SCOPUS:85180728721

VL - 11

JO - Processes

JF - Processes

SN - 2227-9717

IS - 12

M1 - 3373

ER -