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Microwave-assisted synthesis of mesoporous titania with increased crystallinity, specific surface area, and photocatalytic activity

(2016) JOURNAL OF MATERIALS SCIENCE. 51(21). p.9822-9829
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Abstract
Mesoporous titanium dioxide is a material finding its use in a wide range of applications. For many of these, it is important to achieve a high degree of crystallinity in the material. It is generally accepted that the use of the soft templating approach to synthesize mesoporous titania, results in a compromise between crystallinity and specific surface area due to thermal instability of the used templates. In this paper, we explore how the use of microwave irradiation can influence the crystallinity, specific surface area, and the electronic properties of mesoporous titania. Therefore, we combined microwave radiation with an evaporation-induced self-assembly (EISA) synthesis. We show that additional microwave treatment at carefully chosen synthesis steps can enhance the crystallinity with 20 % without causing significant loss of surface area (> 360 m(2)/g). Surface photovoltage measurements were used to investigate the electronic properties. The photocatalytic activity of the samples was evaluated in aqueous media by following the degradation of an industrial dye, methylene blue, and the herbicide isoproturon under UV irradiation and in gaseous media looking at the degradation of acetaldehyde, a common indoor pollutant under UVA irradiation. In all cases, the microwave treatment results in more active materials.
Keywords
TIO2, SACRIFICIAL TEMPLATES, DIOXIDE, ANATASE, NANOCRYSTALS, DEGRADATION, NANOTUBES, OXIDATION, FILMS, ATOMIC LAYER DEPOSITION

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Citation

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Chicago
Meire, Mieke, Sammy W Verbruggen, Silvia Lenaerts, Petra Lommens, Pascal Van Der Voort, and Isabel Van Driessche. 2016. “Microwave-assisted Synthesis of Mesoporous Titania with Increased Crystallinity, Specific Surface Area, and Photocatalytic Activity.” Journal of Materials Science 51 (21): 9822–9829.
APA
Meire, Mieke, Verbruggen, S. W., Lenaerts, S., Lommens, P., Van Der Voort, P., & Van Driessche, I. (2016). Microwave-assisted synthesis of mesoporous titania with increased crystallinity, specific surface area, and photocatalytic activity. JOURNAL OF MATERIALS SCIENCE, 51(21), 9822–9829.
Vancouver
1.
Meire M, Verbruggen SW, Lenaerts S, Lommens P, Van Der Voort P, Van Driessche I. Microwave-assisted synthesis of mesoporous titania with increased crystallinity, specific surface area, and photocatalytic activity. JOURNAL OF MATERIALS SCIENCE. 2016;51(21):9822–9.
MLA
Meire, Mieke, Sammy W Verbruggen, Silvia Lenaerts, et al. “Microwave-assisted Synthesis of Mesoporous Titania with Increased Crystallinity, Specific Surface Area, and Photocatalytic Activity.” JOURNAL OF MATERIALS SCIENCE 51.21 (2016): 9822–9829. Print.
@article{8083095,
  abstract     = {Mesoporous titanium dioxide is a material finding its use in a wide range of applications. For many of these, it is important to achieve a high degree of crystallinity in the material. It is generally accepted that the use of the soft templating approach to synthesize mesoporous titania, results in a compromise between crystallinity and specific surface area due to thermal instability of the used templates. In this paper, we explore how the use of microwave irradiation can influence the crystallinity, specific surface area, and the electronic properties of mesoporous titania. Therefore, we combined microwave radiation with an evaporation-induced self-assembly (EISA) synthesis. We show that additional microwave treatment at carefully chosen synthesis steps can enhance the crystallinity with 20 \% without causing significant loss of surface area ({\textrangle} 360 m(2)/g). Surface photovoltage measurements were used to investigate the electronic properties. The photocatalytic activity of the samples was evaluated in aqueous media by following the degradation of an industrial dye, methylene blue, and the herbicide isoproturon under UV irradiation and in gaseous media looking at the degradation of acetaldehyde, a common indoor pollutant under UVA irradiation. In all cases, the microwave treatment results in more active materials.},
  author       = {Meire, Mieke and Verbruggen, Sammy W and Lenaerts, Silvia and Lommens, Petra and Van Der Voort, Pascal and Van Driessche, Isabel},
  issn         = {0022-2461},
  journal      = {JOURNAL OF MATERIALS SCIENCE},
  keyword      = {TIO2,SACRIFICIAL TEMPLATES,DIOXIDE,ANATASE,NANOCRYSTALS,DEGRADATION,NANOTUBES,OXIDATION,FILMS,ATOMIC LAYER DEPOSITION},
  language     = {eng},
  number       = {21},
  pages        = {9822--9829},
  title        = {Microwave-assisted synthesis of mesoporous titania with increased crystallinity, specific surface area, and photocatalytic activity},
  url          = {http://dx.doi.org/10.1007/s10853-016-0215-y},
  volume       = {51},
  year         = {2016},
}

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