Reusable TiO2-SBA-15 Synthesized by Different Silica/Titania Ratios for Photodegradation

被引:1
|
作者
Gol, Sevgi Can [1 ]
Akbay, Elif [1 ]
机构
[1] Eskisehir Tech Univ, Dept Chem Engn, TR-26470 Eskisehir, Turkiye
来源
CHEMISTRYSELECT | 2023年 / 8卷 / 43期
关键词
Mesoporous material; Photocatalytic degradation; Reusability; TiO2/SBA-15; MESOPOROUS SBA-15; PHOTOCATALYTIC DEGRADATION; TI-SBA-15; CATALYSTS; NANO TITANIA; WASTE-WATER; TIO2; ADSORPTION; REMOVAL; NANOPARTICLES; PERFORMANCE;
D O I
10.1002/slct.202301887
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A series of TiO2/SBA-15 photocatalysts were synthesized with different Si/Ti ratios by a one-step hydrothermal method with TiO2 nano-powder. During the synthesis of TiO2/SBA-15 s, the SBA-15 pore structure and channels did not deteriorate, and the Si/Ti molar ratios were close to the expected nominal ratios. Photocatalysts exhibited a uniform-narrow pore size distribution, and the BET areas were in the range of 621-583 m(2)/g. TiO2 nanocrystals into the SBA-15 mesopores walls achieve up to the ratio of Si/Ti=16. The optical band gap energies were significantly red-shifted with increasing Ti insertion, which is the quantization effects improving the photocatalytic activities. The photocatalytic activities of the TiO2/SBA-15 s were evaluated by the degradation of methylene blue under a UV-light irradiation at a constant TiO2 content. The highest efficiency was obtained in the TiO2/SBA-15(16) photocatalyst at 79.6 %. The results of reusability and stability analyses demonstrate that the photocatalyst activity and stability are good, and that the photocatalytic activity was sustainable after reuse for several cycles.
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页数:8
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