期刊
ADVANCED POWDER TECHNOLOGY
卷 31, 期 8, 页码 3351-3360出版社
ELSEVIER
DOI: 10.1016/j.apt.2020.06.028
关键词
Halloysite; Titanium species; DBT; Oxidative desulfurization
资金
- National Foundation for Science and Technology Development (NAFOSTED) of Vietnam [105.99-2018.301]
Here we show that bimetallic Ti-Al-SBA-15 materials were synthesized successfully from titanium tetraisopropoxide (TTIP) and natural halloysite clay via the direct hydrothermal method. The results revealed that the incorporation of titanium species in the Al-SBA-15 framework retained the characteristic peaks and possessed an increased Brunauer-Emmett-Teller (BET) surface area in comparison to the conventional Al-SBA-15 material. The successful isomorphous substitution of titanium in the Al-SBA-15 framework was confirmed by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopies. The transmission electron microscopy (TEM) images showed that the composite material exhibited a highly ordered 2-D hexagonal mesostructure. The photocatalytic activity of these Ti-Al-SBA-15 mesoporous materials were assessed by dibenzothiophene (DBT) conversion under UV light irradiation, showing that the Al-SBA-15 sample containing 7.5 wt% of titanium possessed the highest photocatalytic activity with a conversion of 92.68% at 70 degrees C and maintained the catalytic performance after four cycles. These results suggest a promising technique to produce the Ti-Al-SBA-15 photocatalyst from an abundant and lowcost clay material. (c) 2020 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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