期刊
SUSTAINABLE ENVIRONMENT RESEARCH
卷 27, 期 2, 页码 70-76出版社
BMC
DOI: 10.1016/j.serj.2017.01.003
关键词
Carbon impregnation; Titanium dioxide; Elemental mercury; Photocatalysis; Competitive adsorption
资金
- Ministry of Science and Technology, Taiwan [MOST 103-2313-B-002-018-MY3]
A carbon-containing titanium dioxide (C-TiO2) photocatalyst was prepared via ethanol impregnation using commercial Ishihara ST-01 TiO2 powder as the precursor. Scanning Electron Microscopy and X-ray Diffractometry results indicated that raw ST-01 and C-TiO2 had similarly globular shapes and presented in anatase phase. N-2 adsorption isotherms suggested that carbon impregnated on the TiO2 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-TiO2 surface. Removal of low-concentration Hg-0 by raw and C-TiO2 was enhanced with increasing O-2 concentration. Furthermore, because the existence of C-functional groups on the C-TiO2 surface, the photoinduced hydrophilicity resulted from light irradiation appears to decrease, causing less adsorption competition from H2O for Hg-0 adsorption at higher temperature. The reemission of adsorbed Hg species could thus be significantly decreased by carbon impregnation. (C) 2017 Chinese Institute of Environmental Engineering, Taiwan. Production and hosting by Elsevier B.V.
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