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Hydrothermal Synthesis, Characterization, and Electrochemical Properties of MnO2-Titanate Nanotubes (MnO2-TNTs)

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Abstract

MnO2-TNTs were synthesized via a hydrothermal method at temperatures of 60°C, 80°C, 100°C, 125°C, and 150°C. The effect of synthesis temperature on the morphology and electrochemical properties of the MnO2-TNT (labeled as MT) electrode materials was investigated. The phase formation, morphology, and layered structure were characterized by x-ray diffraction, scanning electron microscopy, and transmission electron microscopy, respectively. MnO2 was included in the titanate nanotube structure having a combination phase of birnessite-type MnO2 and H2Ti2O5·H2O. Fourier transform infrared spectroscopy (FT-IR) and x-ray photoelectron spectroscopy were performed to study the surface functional groups and the surface chemical oxidation state, respectively. Gas adsorption analysis was conducted in order to study the specific surface area and the porosity. The capacitance was controlled by the surface capacitive and diffusion-controlled contributions. The sample synthesized at 80°C exhibited the highest specific capacitance of 155.06 F/g at a current density of 0.5 A/g, with cycling performance of 93.10% after 2000 cycles. It was found that the synthesis temperature affected the morphology, phase composition, specific surface area, and porosity of the prepared materials, in turn affecting in the electrochemical performance of the MnO2-TNT electrode materials.

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Acknowledgments

The authors would like to thank the SUT-NANOTEC-SLRI joint research facility (BL5.3), Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand for XPS facilities. Thanks to Suranaree University of Technology (SUT) and the Office of the Higher Education Commission under NRU Project of Thailand and SUT-NANOTEC RNN on Nanomaterials and Advanced Characterizations, Suranaree University of Technology, Nakhon Ratchasima, Thailand. This work was supported by (i) Suranaree University of Technology (SUT), (ii) Thailand Science Research and Innovation (TSRI), and (iii) National Science, Research and Innovation Fund (NSRF) under project code 90464. Also, this work was supported by (i) Suranaree University of Technology (SUT), (ii) Thailand Science Research and Innovation (TSRI), and (iii) National Science, Research and Innovation Fund (NSRF) (42851).

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  1. School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand

    Kwunta Siwawongkasem, Wipada Senanon & Santi Maensiri

  2. SUT Center of Excellence on Advanced Functional Materials, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand

    Wipada Senanon & Santi Maensiri

  3. SUT-NANOTEC RNN on Nanomaterials and Advanced Characterizations, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand

    Wipada Senanon & Santi Maensiri

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Siwawongkasem, K., Senanon, W. & Maensiri, S. Hydrothermal Synthesis, Characterization, and Electrochemical Properties of MnO2-Titanate Nanotubes (MnO2-TNTs). J. Electron. Mater. 51, 3188–3204 (2022). https://doi.org/10.1007/s11664-022-09550-6

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