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International Journal of Engineering، جلد ۳۵، شماره ۱۲، صفحات ۲۳۴۴-۲۳۴۹
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عنوان انگلیسی Structural and Optical Properties of Bismuth-doped ZnO Nanoparticles Synthesized by Co-precipitation
چکیده انگلیسی مقاله Bismuth-doped zinc oxide (ZnO) nanoparticles can serve as efficient photocatalysts for various reactions. Herein, we synthesized and discussed the growth mechanisms of Bi-doped ZnO nanoflakes using co-precipitation with Bi concentrations ranging from 0 to 3 %. The resulting ZnO were hexagonal nanosheets with diameters ranging from 80 nm (ZnO) to 200 nm (ZnO: Bi 3%). The dominant crystal structure matches hexagonal wurtzite with a small presence of Bi2O3 diffraction peaks. The estimated crystallite sizes range from ~ 33 nm to ~ 45 nm, indicating multiple crystalline regions in each nanoflake. Nevertheless, as sheet resistance monotonically decreases with the Bi concentration, the higher number of grain boundaries likely has a lower effect on the conductivity compared to an increase in free carriers and larger grain size in the samples with higher Bi concentration. The bandgap decreases from ~ 3.13 eV to ~ 2.96 eV, likely due to the shrinkage effect from electron-electron or electron-impurity interaction that lowers the conduction band of ZnO.
کلیدواژه‌های انگلیسی مقاله Zinc oxide nanoparticles,bismuth-doped ZnO,Co-precipitation,Photo-catalyst
نویسندگان مقاله C. Sermsrithong |
Physics and General Science Program, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Bangkok, Thailand

P. Jaidaew |
Physics and General Science Program, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Bangkok, Thailand

C. Promjantuk |
Physics and General Science Program, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Bangkok, Thailand

P. Buabthong |
Physics and General Science Program, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Bangkok, Thailand

نشانی اینترنتی https://www.ije.ir/article_157537_e9a6f3962f47112cd072045898aef751.pdf
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