Bi-Template Assisted Sol-Gel Synthesis of Photocatalytically-Active Mesoporous Anatase TiO2 Nanoparticles
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Published:
Jul 13, 2021
Keywords:
Mesoporous TiO2 anatase Bi-Template photocatalysis Sol-Gel
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Abstract
Sol-gel mesoporous titanium dioxide powders have been synthesized from chitosan and/or hexadecyltrimethylammonium bromide (HDTMA) and characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible (UV-vis) spectroscopy, thermogravimetric analysis (TGA), differential thermal analysis (DTA) and N2 adsorption-desorption measurements. The photocatalytic performance of the synthesized meso-TiO2 powders was optimized based on the central composite design (CCD) of methyl orange (MO) degradation under UV light irradiation. The maximum MO degradation was 62.3% over a period of 60 min. Oxides produced using the binary chitosan and HDTMA template (C,H-TiO2) exhibited the relatively higher surface area (99.5 m2/g), smaller crystal size (12.78 nm), narrower band-gap energy (2.92 eV) and higher photocatalytic rate constant (0.0112 min–1) than as those from chitosan (C/TiO2) or HDTMA (H/TiO2) as the template.
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Hamisu, A., Gaya, U. I., & Abdullah, A. H. (2021). Bi-Template Assisted Sol-Gel Synthesis of Photocatalytically-Active Mesoporous Anatase TiO2 Nanoparticles. Applied Science and Engineering Progress, 14(3), 313–327. https://doi.org/10.14416/j.asep.2021.04.003
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References
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[20] J. Ramos, I. Mejia, J. Murphy, M. Quevedo, P. Garcia, and C. Martinez, “Synthesis of titanium oxide nanoparticles using DNA-complex as template for solution-processable hybrid dielectric composites,” Journal of Alloys and Compounds, vol. 643, no. 1, pp. S84–S89, 2015, doi: 10.1016/j.jallcom.2014. 09.201.
[21] K. Ö. Hamaloğlu, B. Çelebi, E. Sağ, and A. Tuncel, “A new method for the synthesis of monodisperse-porous titania microbeads by using polymethacrylate microbeads as template,” Microporous and Mesoporous Materials, vol. 207, pp. 17–26, 2015, doi: 10.1016/j.micromeso. 2015.01.001.
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