光催化
光降解
材料科学
介孔材料
化学工程
热液循环
亚甲蓝
降级(电信)
带隙
纳米技术
核化学
催化作用
光电子学
化学
有机化学
计算机科学
电信
工程类
作者
Sevgi Can Göl,Elif Akbay
标识
DOI:10.1002/slct.202301887
摘要
Abstract A series of TiO 2 /SBA‐15 photocatalysts were synthesized with different Si/Ti ratios by a one‐step hydrothermal method with TiO 2 nano‐powder. During the synthesis of TiO 2 /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. TiO 2 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 TiO 2 /SBA‐15 s were evaluated by the degradation of methylene blue under a UV‐light irradiation at a constant TiO 2 content. The highest efficiency was obtained in the TiO 2 /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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