Tarmizi Taher, Akihiro Yoshida, Aldes Lesbani, Irwan Kurnia, Guoqing Guan, Abuliti Abudula, Wataru Ueda
Nano-rod-shaped niobium oxide with a deformed orthorhombic structure (ortho-Nb2O5) is first demonstrated as a selective adsorbent to remove cationic dyes wastewater. Ortho-Nb2O5 quickly adsorbs methylene blue (MB) with much greater capacity than reported inorganic adsorbents. Furthermore, ortho-Nb2O5 has a stronger affinity to cationic dye than anionic dye because cation exchange is involved in the adsorption process. The dye molecule adsorbed onto ortho-Nb2O5 can be degraded entirely under UV light irradiation because of its photocatalytic properties. Moreover, the regenerated ortho-Nb2O5 shows high reusability for use in additional adsorption processing. As described herein, new insights into the use of ortho-Nb2O5 as a photocatalytically regeneratable adsorbent for wastewater treatment are presented. © 2021 Elsevier B.V.
Institute of Regional Innovation, Hirosaki University, 2-1-3 Matsubara, Aomori, 030-0813, Japan; Department of Environmental Engineering, Institut Teknologi Sumatera, Jalan Terusan Ryacudu, Way Hui, Kecamatan Jati Agung, Lampung Selatan, 35365, Indonesia; Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki, 036-8560, Japan; Department of Environmental Sciences, Graduate School of Sriwijaya University, Jl. Padang Selasa, No. 524, Bukit Besar, Palembang, 30139, South Sumatra, Indonesia; Department of Chemistry, Faculty of Mathematic and Natural Sciences, Sriwijaya University, Jl. Palembang-Prabumulih, Km. 32, Ogan Ilir, 30662, South Sumatra, Indonesia; Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama, 221-8686, Japan
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