Applied Sciences
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DOI: Synthesis And Evaluation Of Metal-Doped Rice Husk Silica For Iodine Vapor Capture
Niyazova Dilnoza Bakhtiyorovna , Researcher (PhD), Institute of General and Inorganic Chemistry, ASc RUz, Tashkent, Uzbekistan Mamajonov Bakhodirjon Madaminovich , Applicant (PhD Seeker), Namangan Institute of Engineering and Technology, Namangan, Uzbekistan Khoshimov Shakhrom Mansurovich , Doctoral student (DSc), Institute of General and Inorganic Chemistry, ASc RUz, Tashkent, Uzbekistan Abdikamalova Aziza Bakhtiyarovna , Chief researcher, Institute of General and Inorganic Chemistry, ASc RUz, Doctor of Chemical Sciences, Professor, Uzbekistan Eshmetov Izzat Dusimbatovich , Chief researcher, Institute of General and Inorganic Chemistry, ASc RUz, Doctor of Chemical Sciences, Professor, Uzbekistan Mamataliev Nozim Nimadjonovich , Chief researcher, Institute of General and Inorganic Chemistry, ASc RUz, Doctor of Chemical Sciences, Uzbekistan Alisher Maksetbaevich Kalbaev , Junior Researcher, PhD, Institute of General and Inorganic Chemistry, ASc RUz, Tashkent, Republic of Uzbekistan, UzbekistanAbstract
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.
Keywords
Rice husk silica, iodine capture, metal-doped sorbents
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Copyright (c) 2025 Niyazova Dilnoza Bakhtiyorovna, Mamajonov Bakhodirjon Madaminovich, Khoshimov Shakhrom Mansurovich, Abdikamalova Aziza Bakhtiyarovna, Eshmetov Izzat Dusimbatovich, Mamataliev Nozim Nimadjonovich, Alisher Maksetbaevich Kalbaev
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