Synthesis And Evaluation Of Metal-Doped Rice Husk Silica For Iodine Vapor Capture
Niyazova Dilnoza BakhtiyorovnaResearcher (PhD) , Institute of General and Inorganic Chemistry , ASc RUz , Tashkent , UzbekistanMamajonov Bakhodirjon MadaminovichNamangan Institute of Engineering and Technology , Namangan , Uzbekistan Doctoral student (DSc) ,Khoshimov Shakhrom MansurovichAbdikamalova Aziza BakhtiyarovnaInstitute of General and Inorganic Chemistry , ASc RUz , Doctor of Chemical Sciences , Professor , Uzbekistan Chief researcher ,Eshmetov Izzat DusimbatovichMamataliev Nozim NimadjonovichInstitute of General and Inorganic Chemistry , ASc RUz , Doctor of Chemical Sciences , UzbekistanAlisher Maksetbaevich KalbaevJunior Researcher , PhD , Institute of General and Inorganic Chemistry , ASc RUz , Tashkent , Republic of Uzbekistan , Uzbekistan
The American Journal of Applied Sciencesjournal2025
ABI
Аннотация
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.
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