Photochemical and photocatalytic degradation of an indigoid dye: a case study of acid blue 74 (AB74)
Photochemical and photocatalytic degradation of an indigoid dye: a case study of acid blue 74 (AB74)
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DOI：
10.1016/s1010-6030(01)00435-x
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发表时间：
2001-06-15
影响因子：
4.3
通讯作者：
Kalt, A
中科院分区：
文献类型：
--
作者：
Galindo, C;Jacques, P;Kalt, A
本文详细研究了靛蓝染料AB 74的光化学和光催化降解。H2 O2和C-UV光单独使用时，其影响可忽略不计。然而，联合UV/H2 O2处理更有效地分解这种有机化合物。令人惊讶的是，反应顺序强烈地依赖于初始染料浓度。另一方面，H-1 NMR分析表明，原始染料首先转化为靛红磺酸，然后转化为脂肪酸。在半导体带隙激发下，AB 74也发生不可逆氧化。的光降解动力学，在不同的催化剂上，讨论的Langmuir-Hinshelwood模型。1H-1 NMR，UV-VIS和FTIR光谱技术提供了一个洞察的性质的光产物。这是可能的，然后提出一个更完整的降解机制比假设到现在为止。(C)出版社：Elsevier Science B. V.
A detailed investigation of the photochemical and photocatalytic degradations of the indigoid dye AB74 is presented. H2O2 and C-UV light have negligible effect when they are used on their own. However, joint UV/H2O2 treatment more efficiently decomposes this organic compound. Surprisingly, reaction order depends strongly on the initial dye concentration On the other hand, H-1 NMR analysis reveals that the original dye is first converted into isatinsulfonic acid, then into aliphatic acids. Under band gap excitation of semiconductors, AB74 undergoes irreversible oxidation too. The photodegradation kinetics, on various catalysts, are discussed in term of the Langmuir-Hinshelwood model. H-1 NMR, UV-VIS and FTIR spectroscopic techniques provide an insight into the nature of the photoproducts. It was possible then to present a more complete degradation mechanism than supposed until now. (C) 2001 Published by Elsevier Science B.V.