|Title:||Influence of carbon-functional groups with less hydrophilicity on a TiO <inf>2</inf> photocatalyst for removing low-level elemental mercury||Authors:||Tsai, Cheng Yen
Pan, Yu Tsai
Tseng, Yao Hsuan
Kuo, Tien Ho
|Keywords:||Carbon impregnation | Competitive adsorption | Elemental mercury | Photocatalysis | Titanium dioxide||Issue Date:||1-Mar-2017||Publisher:||BMC||Journal Volume:||27||Journal Issue:||2||Start page/Pages:||70||Source:||Sustainable Environment Research||Abstract:||
© 2017 Chinese Institute of Environmental Engineering, Taiwan A carbon-containing titanium dioxide (C-TiO 2 ) photocatalyst was prepared via ethanol impregnation using commercial Ishihara ST-01 TiO 2 powder as the precursor. Scanning Electron Microscopy and X-ray Diffractometry results indicated that raw ST-01 and C-TiO 2 had similarly globular shapes and presented in anatase phase. N 2 adsorption isotherms suggested that carbon impregnated on the TiO 2 surface could slightly reduce the total surface area and pore volume. X-ray Photoelectron Spectroscopy and Fourier Transform Infrared Spectroscopy examinations further supported the formation of various C-functional groups on the C-TiO 2 surface. Removal of low-concentration Hg 0 by raw and C-TiO 2 was enhanced with increasing O 2 concentration. Furthermore, because the existence of C-functional groups on the C-TiO 2 surface, the photoinduced hydrophilicity resulted from light irradiation appears to decrease, causing less adsorption competition from H 2 O for Hg 0 adsorption at higher temperature. The reemission of adsorbed Hg species could thus be significantly decreased by carbon impregnation.
|Appears in Collections:||環境工程學研究所|
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