Is methylene blue an appropriate substrate for a photocatalytic activity test? A study with visible-light responsive titania
Is methylene blue an appropriate substrate for a photocatalytic activity test? A study with visible-light responsive titania
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DOI：
10.1016/j.cplett.2006.08.081
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发表时间：
2006-10-05
影响因子：
2.8
通讯作者：
Ohtani, Bunsho
中科院分区：
文献类型：
--
作者：
Yan, Xiaoli;Ohno, Teruhisa;Ohtani, Bunsho
对亚甲基蓝（MB）在曝气水溶液中的分解作用谱分析表明，硫掺杂二氧化钛（S-TiO2）在可见光照射下具有活性，其分解机制与激发波长有关。这表明光敏材料不适合作为光催化活性测试的探针化学品，特别是用于评价可见光下的活性。用乙酸代替MB证实了S-TiO2在600 nm以下的可见光下发生光催化反应，而不是普通的未掺杂二氧化钛，这与S-TiO2的吸收光谱相对应。(c) 2006 Elsevier B.V.版权所有
An analysis of decomposition of methylene blue (MB) in an aerated aqueous solution by its action spectrum has shown that sulfur-doped titania (S-TiO2) has activity under visible-light irradiation and that the decomposition mechanism depends on the excitation wavelength. This suggests that photosensitive materials are not suitable as probe chemicals for photocatalytic activity tests, especially those for evaluation of activity under visible light. It is confirmed using acetic acid instead of MB that S-TiO2, but not ordinary non-doped titania, leads to the photocatalytic reaction under visible radiation below 600 nm, which corresponds to its absorption spectrum. (c) 2006 Elsevier B.V. All rights reserved.