Adsorptive removal and photocatalytic decomposition of cationic dyes on niobium oxide with deformed orthorhombic structure

Tarmizi Taher; Akihiro Yoshida; Aldes Lesbani; Irwan Kurnia; Guoqing Guan; Abuliti Abudula; Wataru Ueda

doi:10.1016/j.jhazmat.2021.125635

Adsorptive removal and photocatalytic decomposition of cationic dyes on niobium oxide with deformed orthorhombic structure

J Hazard Mater. 2021 Aug 5:415:125635. doi: 10.1016/j.jhazmat.2021.125635. Epub 2021 Mar 17.

Authors

Tarmizi Taher¹, Akihiro Yoshida², Aldes Lesbani³, Irwan Kurnia⁴, Guoqing Guan⁵, Abuliti Abudula⁶, Wataru Ueda⁷

Affiliations

¹ 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; Department of Environmental Sciences, Graduate School of Sriwijaya University, Jl. Padang Selasa, No. 524, Bukit Besar, Palembang 30139, South Sumatra, Indonesia.
² Institute of Regional Innovation, Hirosaki University, 2-1-3 Matsubara, Aomori 030-0813, Japan; Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan. Electronic address: [email protected].
³ Department of Chemistry, Faculty of Mathematic and Natural Sciences, Sriwijaya University, Jl. Palembang-Prabumulih, Km. 32, Ogan Ilir, South Sumatra 30662, Indonesia. Electronic address: [email protected].
⁴ Institute of Regional Innovation, Hirosaki University, 2-1-3 Matsubara, Aomori 030-0813, Japan.
⁵ Institute of Regional Innovation, Hirosaki University, 2-1-3 Matsubara, Aomori 030-0813, Japan; Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan.
⁶ Graduate School of Science and Technology, Hirosaki University, 1-Bunkyocho, Hirosaki 036-8560, Japan.
⁷ Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.

PMID: 33770681
DOI: 10.1016/j.jhazmat.2021.125635

Abstract

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.

Keywords: Dye adsorption; Methylene blue; Ortho-Nb(2)O(5); Photocatalytic recovery.

Publication types

Research Support, Non-U.S. Gov't