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Titania-functionalized diatom frustules as photocatalysts for indoor air purification

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Abstract
Diatoms are single-celled algae, which produce a porous silica skeleton. These so-called frustules can take on a large variation of shapes and sizes. In this study, the Thalassiosira Pseusonana algae species was selected and its frustules were functionalized with titania nanoparticles. The synthesis method used was an impregnation with titanyl sulfate (TiOSO4) in water, which makes the procedure more environmentally friendly than when using the more common titanium alkoxides or chlorides. The immobilized titania nanoparticles could be visualized by TEM measurements, which showed that the NP are well dispersed on the silica surface (Figure 1). The samples were used as photocatalyst in the oxidative decomposition of gaseous acetaldehyde, which is a common indoor air pollutant. The titania nanoparticles immobilized on the diatom frustules were 2.5 times more active than P25, which is the most common titania benchmark in photocatalysis. The titania-functionalized frustules also performed well in humid conditions and over a prolonged period of time, which are both important factors to consider for applications in indoor air pollution.

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MLA
Ouwehand, Judith, et al. “Titania-Functionalized Diatom Frustules as Photocatalysts for Indoor Air Purification.” ChemCYS Book of Abstracts, Koninklijke Vlaamse Chemische Vereniging (KVCV), 2018.
APA
Ouwehand, J., Van Eynde, E., De Canck, E., Lenaerts, S., Verberckmoes, A., & Van Der Voort, P. (2018). Titania-functionalized diatom frustules as photocatalysts for indoor air purification. ChemCYS Book of Abstracts. Presented at the 14th Chemistry conference for Young Scientists (ChemCYS 2018), Blankenberge, Belgium.
Chicago author-date
Ouwehand, Judith, Erik Van Eynde, Els De Canck, Silvia Lenaerts, An Verberckmoes, and Pascal Van Der Voort. 2018. “Titania-Functionalized Diatom Frustules as Photocatalysts for Indoor Air Purification.” In ChemCYS Book of Abstracts. Koninklijke Vlaamse Chemische Vereniging (KVCV).
Chicago author-date (all authors)
Ouwehand, Judith, Erik Van Eynde, Els De Canck, Silvia Lenaerts, An Verberckmoes, and Pascal Van Der Voort. 2018. “Titania-Functionalized Diatom Frustules as Photocatalysts for Indoor Air Purification.” In ChemCYS Book of Abstracts. Koninklijke Vlaamse Chemische Vereniging (KVCV).
Vancouver
1.
Ouwehand J, Van Eynde E, De Canck E, Lenaerts S, Verberckmoes A, Van Der Voort P. Titania-functionalized diatom frustules as photocatalysts for indoor air purification. In: ChemCYS book of abstracts. Koninklijke Vlaamse Chemische Vereniging (KVCV); 2018.
IEEE
[1]
J. Ouwehand, E. Van Eynde, E. De Canck, S. Lenaerts, A. Verberckmoes, and P. Van Der Voort, “Titania-functionalized diatom frustules as photocatalysts for indoor air purification,” in ChemCYS book of abstracts, Blankenberge, Belgium, 2018.
@inproceedings{8552530,
  abstract     = {{Diatoms are single-celled algae, which produce a porous silica skeleton. These so-called frustules can take on a large variation of shapes and sizes. In this study, the Thalassiosira Pseusonana algae species was selected and its frustules were functionalized with titania nanoparticles. The synthesis method used was an impregnation with titanyl sulfate (TiOSO4) in water, which makes the procedure more environmentally friendly than when using the more common titanium alkoxides or chlorides. The immobilized titania nanoparticles could be visualized by TEM measurements, which showed that the NP are well dispersed on the silica surface (Figure 1).
The samples were used as photocatalyst in the oxidative decomposition of gaseous acetaldehyde, which is a common indoor air pollutant. The titania nanoparticles immobilized on the diatom frustules were 2.5 times more active than P25, which is the most common titania benchmark in photocatalysis. The titania-functionalized frustules also performed well in humid conditions and over a prolonged period of time, which are both important factors to consider for applications in indoor air pollution.}},
  author       = {{Ouwehand, Judith and Van Eynde, Erik and De Canck, Els and Lenaerts, Silvia and Verberckmoes, An and Van Der Voort, Pascal}},
  booktitle    = {{ChemCYS book of abstracts}},
  language     = {{eng}},
  location     = {{Blankenberge, Belgium}},
  publisher    = {{Koninklijke Vlaamse Chemische Vereniging (KVCV)}},
  title        = {{Titania-functionalized diatom frustules as photocatalysts for indoor air purification}},
  year         = {{2018}},
}