Citation: TONG Xin, CHEN Rui, CHEN Tie-Hong. Photocatalytic Activity of TiO₂ with Micrometer-Sized Macropores[J]. Acta Physico-Chimica Sinica, ;2011, 27(08): 1941-1946. doi: 10.3866/PKU.WHXB20110836 shu

Photocatalytic Activity of TiO₂ with Micrometer-Sized Macropores

1.
Institute of New Catalytic Materials Science, Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin 300071, P. R. China

Received Date: 17 March 2011
Available Online: 28 June 2011
Fund Project: 国家自然科学基金(20873070, 20973095)资助项目 (20873070, 20973095)

Macroporous TiO₂ with aligned channels was synthesized using citric acid as a chelator. The wall of the macropore was composed of nanosized anatase crystals. The degradation of rhodamine B (RhB) was used as a model reaction to test the photocatalytic activity of the samples. Compared with ground TiO₂ powder, macroporous TiO₂ with aligned channels did not give a better photocatalytic RhB degradation property. Because of the scattering of UV-light by anatase nanoparticles, the TiO₂ located inside the macroporous wall was not irradiated by UV-light, and this affected the photocatalytic property of the macroporous TiO₂. The photocatalytic property improved upon exposing more of the external TiO₂ surface to UV light. Furthermore, uniform and dispersed micrometer sized TiO₂ spheres were fabricated using cetyltriethylammonium bromide (CTAB) and polyacrylic acid (PAA) as templates. The photocatalytic degradation of RhB confirmed that reducing the particle size improved the efficiency of the photocatalytic activity.
- TiO₂,
- Photocatalysis,
- Morphology,
- Macroporous structure,
- Scattering
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沈阳化工大学材料科学与工程学院沈阳 110142

Photocatalytic Activity of TiO2 with Micrometer-Sized Macropores

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通讯作者: 陈斌, bchen63@163.com

Photocatalytic Activity of TiO₂ with Micrometer-Sized Macropores