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High-Efficiency and Conveniently Recyclable Photocatalysts for Methyl Violet Dye Degradation Based on Rod-Shaped Nano-MnO2

  • PHOTOCHEMISTRY AND MAGNETOCHEMISTRY
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Abstract

A rod-shaped manganese oxide nanoparticles (MnO2) were successfully synthesized by a simple hydrothermal method. The phase composition, morphology, elemental composition, surface groups, and photocatalytic properties of nano-MnO2 were characterized using X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoemission spectroscopy (XPS), and UV–Vis absorption spectrophotometry. The optimum reaction conditions are determined to be the reaction temperature of 120°C, and the reaction time of 12 h. Nano-MnO2 exhibited a uniform rod-shaped structure with a length in the range of 2–3 μm and the diameter of 50–60 nm. Furthermore, the prepared nano-MnO2 photocatalyst displayed the highest photocatalytic activity, with a methyl violet (MV) degradation ratio up to 89.5%, and the optimum nano-MnO2 dosage is 0.4 mg/mL. Besides, the nano-MnO2 sample possesses a stable and efficient photocatalytic performance after five recycling runs, demonstrating that the excellent recyclability and stability of sample under UV–Vis light irradiation. In summary, this result indicated that nano-MnO2 photocatalyst exhibited great promise as a means of effectively treating organic pollutants.

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Authors and Affiliations

  1. Chemical Engineering College, Hebei Normal University of Science and Technology, 066600, Qinhuangdao, China

    Han Liu, Zhan-quan Liu, Ya-jie Han, Xue-fang Zheng & Qi Lian

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  1. Han Liu
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  2. Zhan-quan Liu
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  3. Ya-jie Han
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Correspondence to Xue-fang Zheng or Qi Lian.

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Liu, H., Liu, Zq., Han, Yj. et al. High-Efficiency and Conveniently Recyclable Photocatalysts for Methyl Violet Dye Degradation Based on Rod-Shaped Nano-MnO2. Russ. J. Phys. Chem. 95 (Suppl 2), S388–S395 (2021). https://doi.org/10.1134/S0036024421150152

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