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Volume 45 All articles Published: 10 February 2022 Article ID 0035
Highly efficient degradation of rhodamine B by ${\alpha}$-MnO$_2$ nanorods
SHUMIN WANG AO GUAN JIAHAN WANG XIAOFANG FU XIANG GUO YUAN TIAN KAIXUAN WANG WENPING CAO CUIMEI ZHAO
Manganese dioxide (${\alpha}$-MnO$_2$) nanorods with diameters of about 5–15 nm and lengths of 100–150 nm were synthesized by a simple co-precipitation method, and the degradation mechanism of rhodamine B (RhB) at different pH levels was investigated. The ${\alpha}$-MnO$_2$ nanorods exhibited a high efficiency and rapid removal rate of RhB, which reached about 97.5% within 10 min when pH = 4 (and pH = 6.6) and 97.7% within 50 min when pH = 9 in the presence of H$_2$O$_2$. The results also indicated that a lower pH value is conducive to the blue shift of the characteristic peak of RhB dye and the attenuation of the characteristic peak intensity, which is mainly attributed to the combined effect of oxidative degradation and adsorption decolourization when pH is less than 9. Moreover, the ${\alpha}$-MnO$_2$ nanorod exhibits an excellent recyclability and catalytic stability. This research indicates that a-MnO2 nanorods have a potential application in practical dye pollutant treatment.
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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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