Department of Photocatalysis and Alternative Energies, Venezuelan Institute for Scientific Research (IVIC), 20632, Caracas 1020-A, Venezuela E-mail:
Water Sci Technol. 2014;69(11):2184-90. doi: 10.2166/wst.2014.127.
The influence of activated carbon (AC) on the photocatalytic activity of different crystalline TiO2 phases was verified in the photocatalytic degradation of methylene blue under UV and solar irradiation. The results showed a volcano trend with a maximum photoactivity for the crystalline phase ratio of anatase:rutile equal to 80:20 both under UV or solar irradiation. By contrast, in presence of AC the photocatalytic activity of the binary materials of TiO2/AC followed an exponential trend, increasing as a function of the increase in anatase proportion in the TiO2 framework. The increase in the photoactivity of the binary material TiO2/AC relative to neat TiO2 was up to 22 and about 17 times higher under UV and visible irradiation, respectively. The present results suggest that AC interacts more efficiently with anatase phase than with rutile phase.
在紫外线和太阳光照射下，通过光催化降解亚甲基蓝来验证活性炭 (AC) 对不同晶型 TiO2 相光催化活性的影响。结果表明，在紫外线或太阳光照射下，具有锐钛矿：金红石比例为 80:20 的晶相比具有最大的光催化活性。相比之下，在存在 AC 的情况下，TiO2/AC 二元材料的光催化活性遵循指数趋势，随着 TiO2 骨架中锐钛矿比例的增加而增加。与纯 TiO2 相比，二元材料 TiO2/AC 的光催化活性分别在紫外线和可见光照射下提高了 22 倍和 17 倍左右。目前的结果表明，AC 与锐钛矿相的相互作用比与金红石相的相互作用更有效。
