https://scholars.lib.ntu.edu.tw/handle/123456789/425144
Title: | Preparation of Cu-Doped TiO2 Photocatalyst with Thermal Plasma Torch for Low-Concentration Mercury Removal | Authors: | Tsai, Cheng Yen HSING-CHENG HSI Kuo, Tien Ho Chang, Yu Min Liou, Jian Hong |
Keywords: | Hg | Metal doping | Plasma torch | Visible-light photocatalyst | Issue Date: | 4-Mar-2013 | Publisher: | TAIWAN ASSOC AEROSOL RES-TAAR | Journal Volume: | 13 | Journal Issue: | 2 | Start page/Pages: | 639 | Source: | Aerosol and Air Quality Research | Abstract: | A high-quality, Cu-doped TiO 2 photocatalyst was prepared via a single-step process using an atmospheric-pressure plasma torch system. Degussa P-25 was thermally doped with Cu at Cu/(Cu + TiO 2 ) ratios of 0-5 wt.%. The raw and resulting nanoparticles were characterized using TEM, XRD, UV-Vis, and XPS. TEM showed that the particle size of plasma-treated TiO 2 was generally < 50 nm. 67-75% of the resulting particles, by number were between 10 and 20 nm. The remaining particles were < 10 nm (~10%) and between 20 and 30 nm (~10%). The XRD results showed that Cu doping decreased the anatase/rutile crystalline ratio compared to untreated P-25. Nevertheless, the greater the amount of Cu added, the greater the anatase/rutile ratio was for the Cu-doped TiO 2 . The UV-Vis results showed that the absorption wavelength for plasma-treated TiO 2 extended to the visible light range, especially for TiO 2 doped with 5 wt.% Cu. The XPS results revealed that the form of Ti was Ti 3+ and Ti 4+ , O was O 2- , and Cu was Cu + and Cu 2+ . The Hg 0 breakthrough tests indicated that the Cu-doped TiO 2 underwent appreciable Hg 0 removal under visible-light irradiation. Doped Cu effectively suppressed Hg reemission from the TiO 2 surface. Copyright © Taiwan Association for Aerosol Research. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/425144 | ISSN: | 16808584 | DOI: | https://api.elsevier.com/content/abstract/scopus_id/84874365804 10.4209/aaqr.2012.07.0196 |
Appears in Collections: | 環境工程學研究所 |
File | Description | Size | Format | |
---|---|---|---|---|
20_AAQR-12-07-OA-0196_639-648.pdf | 1.69 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.