A green route to preparation of silica powders with rice husk ash and waste gas

A sustainable route for the preparation of activated carbon and silica from rice husk ash

“…We have studied the preparation of rice husk-based porous carbons and the extraction of silica from RHA [17][18][19]. The silica produced was modified with long-chain alcohols and the reaction mechanism was proposed [20].…”

Adsorption of sulfur compound utilizing rice husk ash modified with niobium

“…RHA is an excellent source for obtaining silica in which can be obtained with about 92 wt.% purity [12,13,[18][19][20][21]. In addition, the use of RHA has also been investigated in obtaining adsorbents and catalysts.…”

Biocompatibility assessment of rice husk-derived biogenic silica nanoparticles for biomedical applications

“…Silica nanoparticles have received attention for a variety of applications, such as in catalysis, pigments, thin-film substrates, thermal insulators, pesticides, food additives, drug delivery, gene therapy, molecular imaging and additives in plastics [1][2][3]. Silicon is ubiquitous and is the second most abundant element on Earth; it is commonly present in both crystalline and amorphous states as silicon dioxide (silica; SiO 2 ).…”