Core/Shell Nitrogen-Doped TiO<sub>2</sub>@SiO<sub>2</sub> Nano-Catalyst as an Additive in Photocatalytic Paint for Gaseous Acetaldehyde Decomposition
A nitrogen-doped TiO<sub>2</sub>@SiO<sub>2</sub> core/shell nano-photocatalyst (N-TiO<sub>2</sub>@SiO<sub>2</sub>) was used as an additive in photocatalytic paint and applied for the photocatalytic degradation of gaseous acetaldehyde under light-emitti...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
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| Series: | Catalysts |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4344/13/2/351 |
| Summary: | A nitrogen-doped TiO<sub>2</sub>@SiO<sub>2</sub> core/shell nano-photocatalyst (N-TiO<sub>2</sub>@SiO<sub>2</sub>) was used as an additive in photocatalytic paint and applied for the photocatalytic degradation of gaseous acetaldehyde under light-emitting diode (LED) visible light irradiation. N-TiO<sub>2</sub> was synthesised via the solvothermal method and then encapsulated by SiO<sub>2</sub> via the sol-gel method. The incorporation of the N atom into the TiO<sub>2</sub> structure was observed by X-ray photoelectron spectroscopy. The N-TiO<sub>2</sub>@SiO<sub>2</sub> core/shell structure was determined by TEM images. The photodegradation of gaseous acetaldehyde using the prepared N-TiO<sub>2</sub>@SiO<sub>2</sub> photocatalytic paint was examined in a closed chamber under LED light irradiation. The photodegradation of acetaldehyde by N-TiO<sub>2</sub>@SiO<sub>2</sub> photocatalytic paint (31%) was significantly higher than that of TiO<sub>2</sub> paint (5%) and N-TiO<sub>2</sub> paint (20%) within 16 h. The chemical resistance and adhesion ability of N-TiO<sub>2</sub>@SiO<sub>2</sub> photocatalytic paint were investigated following Thai Industrial Standards (TIS) no. 2321 and standard test methods for rating adhesion by tape test (ASTM D 3359-22). The N-TiO<sub>2</sub>@SiO<sub>2</sub> paint showed good acid and alkali resistance, as well as high adhesion ability comparable with commercial paint (without a photocatalyst). |
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| ISSN: | 2073-4344 |