| Issue |
MATEC Web Conf.
Volume 268, 2019
The 25th Regional Symposium on Chemical Engineering (RSCE 2018)
|
|
|---|---|---|
| Article Number | 07005 | |
| Number of page(s) | 5 | |
| Section | Reaction Engineering and Catalysis | |
| DOI | https://doi.org/10.1051/matecconf/201926807005 | |
| Published online | 20 February 2019 | |
Enhancing the photoactivity of TiO2/SiO2 monolithic catalyst and its reusability for wastewater treatment
Faculty of Chemical Engineering, Ho Chi Minh city University of Technology, 268 Ly Thuong Kiet, Ward 14, District 10, Ho Chi Minh City, Vietnam
Corresponding author: lmvien@hcmut.edu.vn
A series of TiO2/SiO2 photocatalysts were successfully synthesized by the sol-gel method. The TiO2/SiO2 monolith was also synthesized by dip-coating process. The crystalline structure of TiO2/SiO2 powders was identified as pure anatase. The photocatalytic activity of the TiO2/SiO2 powders was evaluated by photodegradation of 20 ppm methylene blue (MB) using a 26W lamp which has the wavelength in the visible light region under different Ti: Si molar ratios and calcination temperatures. The TiO2/SiO2 powders which have Ti: Si molar ratio of 85:15 (TS15) and calcined at 550tC showed the highest photodegradation yield of 84 % after 3h irradiation. Furthermore, the 550˚C calcined TS15 monolith performed the MB degradation yield of 88.9 % after 3h irradiation and its photoactivity still remained after 4 recycle times. The results of this study demonstrated that the TS15 monolith photocatalyst has a reasonable efficiency in the degradation of methylene blue, it could be a promising photocatalyst for removal and degradation of organic pollutants.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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