Citation: Wan-Kuen Jo, Hyun-Jung Kang. Aluminum sheet-based S-doped TiO₂ for photocatalytic decomposition of toxic organic vapors[J]. Chinese Journal of Catalysis, ;2014, 35(7): 1189-1195. doi: 10.1016/S1872-2067(14)60076-0 shu

Aluminum sheet-based S-doped TiO₂ for photocatalytic decomposition of toxic organic vapors

Wan-Kuen Jo ^, ,
Hyun-Jung Kang

1.
Department of Environmental Engineering, Kyungpook National University, Daegu, 702-701, Korea

Corresponding author: Wan-Kuen Jo,
Received Date: 5 January 2014
Available Online: 12 March 2014
Fund Project: This work was supported by the National Research Foundation of Korea Grant Funded by the Korean Government (2011-0027916). (2011-0027916)

S-doped TiO₂ (S-TiO₂) films were immobilized on flexible low-cost aluminum sheets (S-TiO₂-AS) using a sol-gel dipping process and low post-processing temperatures. The photocatalytic degradation of toxic organic vapors using the prepared films was evaluated using a continuous-flow glass tube under visible light exposure. The surface properties of the S-TiO₂-AS and TiO₂-AS films were examined by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and ultraviolet-visible spectroscopy. The photolysis of benzene, toluene, ethyl benzene, and xylene (BTEX) did not occur on the bare AS. In contrast, the photocatalytic degradation efficiencies of the target pollutants using S-TiO₂-AS were higher than those obtained using reference TiO₂-AS photocatalyst. In particular, the average photocatalytic degradation efficiencies of BTEX using S-TiO₂-0.8-AS (S/Ti ratio=0.8) over a 3-h process were 34%, 78%, 91%, and 94%, respectively, whereas those of TiO₂-AS were 2%, 11%, 21%, and 36%, respectively. The photocatalytic decomposition efficiencies of BTEX under visible irradiation using S-TiO₂-AS increased with increasing S/Ti ratios from 0.2 to 0.8, but decreased when the ratio further increased to 1.6. Thus, S-TiO₂-AS can be prepared using optimal S/Ti ratios. The degradation of BTEX over S-TiO₂-AS depended on the air flow rates and initial concentrations of the target chemical. Overall, under optimal conditions, S-TiO₂-AS can be effectively applied for the purification of toxic organic vapors.
- Sol-gel dipping,
- Low post temperature,
- Sulfur-to-titanium ratio,
- Reference titanium dioxide-aluminum,
- sheets-AS
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Aluminum sheet-based S-doped TiO2 for photocatalytic decomposition of toxic organic vapors

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通讯作者: 陈斌, bchen63@163.com

Aluminum sheet-based S-doped TiO₂ for photocatalytic decomposition of toxic organic vapors