Influence of Fe dopant concentrations on physicochemical and photocatalytic properties of Bi2WO6/CeO2 nanocomposites for rhodamine B degradation

International Journal of Industrial Chemistry

دوره 11، شماره 3، آذر 2020، صفحه 161-175

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1007/s40090-020-00214-0

نویسندگان

Natda Wetchakun^{* 1، 2}؛ Khatcharin Wetchakun²؛ Sumet Sakulsermsuk¹

¹Department of Physics and Materials Science, Faculty of Science, Photocatalysts and 2D Materials Research Laboratory, Chiang Mai University, Chiang Mai, 50200, Thailand

²Program of Physics, Faculty of Science, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, 34000, Thailand

چکیده

Fe-doped Bi₂WO₆/CeO₂ nanocomposite materials were prepared by co-precipitation and hydrothermal methods. The physicochemical properties and photocatalytic activities of Bi₂WO₆/CeO₂ nanocomposites after doping with Fe³⁺ ions were systematically investigated. The 0.2Fe-doped Bi₂WO₆/CeO₂ nanocomposites exhibited the optimal photocatalytic activity in the degradation of rhodamine B (RhB), reaching to 62% degradation after 120 min irradiation, which was 10.3 and 2.7 times higher than CeO₂ and Bi₂WO₆, respectively. The improved photocatalytic activity was mainly ascribed to the enhanced charge carrier separation efficiency of the direct Z-scheme heterojunction system. Moreover, the effective trapping of photogenerated electrons and holes by iron ions inhibits the electron–hole recombination. By a trapping experiment, the main radicals (O₂^·−) in the photocatalysis experiment were further ascertained. Finally, we proposed the photocatalytic mechanism of Fe-doped Bi₂WO₆/CeO₂ nanocomposite for RhB degradation.

کلیدواژه‌ها

Bi2WO6/CeO2؛ Iron doping؛ Nanocomposite؛ Photocatalytic activity؛ Wastewater treatment