Applied Sciences
OPEN ACCESS
Synthesis And Evaluation Of Metal-Doped Rice Husk Silica For Iodine Vapor Capture
DOI
Crossref DOI
10.37547/tajas/Volume07Issue11-11
tajas
2025
VOL. 7
/ NO. 11
NOVEMBER
RESEARCH OVERVIEW
Abstract
Amorphous silica was synthesized from rice husk and doped with Ag, Cu, Zn, or Bi to develop iodine sorbents. The resulting metal-loaded silica materials, produced via thermal treatment after wet impregnation, were tested for iodine vapor uptake at 25 °C for 1 hour. Bismuth- and copper-modified silica achieved the highest capacities (0.5–0.6 g I2/g), outperforming silver (0.2 g/g) and zinc (0.15 g/g). The enhanced performance stems from chemisorption via metal iodide formation (AgI, CuI, ZnI2, BiI3). These results align with literature values and demonstrate a sustainable route to efficient iodine capture using low-cost rice husk silica combined with targeted metal additives.
RESEARCH TOPICS
Keywords
Rice husk silica
iodine capture
metal-doped sorbents
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