Influence of carbon-functional groups with less hydrophilicity on a TiO 2 photocatalyst for removing low-level elemental mercury
Journal
Sustainable Environment Research
Journal Volume
27
Journal Issue
2
Pages
70
Date Issued
2017-03-01
Author(s)
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.
Subjects
Carbon impregnation | Competitive adsorption | Elemental mercury | Photocatalysis | Titanium dioxide
Publisher
BMC
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
1-s2.0-S2468203916301844-main.pdf
Size
883.09 KB
Format
Adobe PDF
Checksum
(MD5):db11972656535d4cc2cfbd0465fa78a0