Improving thermal stability and light fastness of Acid Red 114 by incorporating its anions in a ZnAl-layered double hydroxides matrix

Incorporation of anions of Acid Red 114 dye （1,3-naphthalenedisulfonic acid, 8-[2-[3,3＇-dimethyl-4＇-[2-[4- [l（4-methylphenyl）sulfonyl]oxy] phenyl]diazenyl] [1,1＇-biphenyl]-4-yl]diazenyl]-7-hydroxy-, disodium salt） （denoted as NPDA） into ZnAl-layered double hydroxides （LDHs） has been carried out by a...

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Bibliographic Details
Published in:Particuology 2012-08, Vol.10 (4), p.503-508
Main Authors: Zhu, Haifeng, Wang, Liren, Tang, Pinggui, Feng, Yongjun, Li, Dianqing
Format: Article
Language:English
Subjects:
Anion-exchange
Anions
Dyes
Galleries
Hydroxides
Incorporation
Infrared spectroscopy
Interlayers
Layered double hydroxides
Light fastness
Thermal stability
ZnAl
层状双氢氧化物
层状双金属氢氧化物
矩阵
耐光性
酸性红
阴离子交换
高热稳定性
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Summary:Incorporation of anions of Acid Red 114 dye （1,3-naphthalenedisulfonic acid, 8-[2-[3,3＇-dimethyl-4＇-[2-[4- [l（4-methylphenyl）sulfonyl]oxy] phenyl]diazenyl] [1,1＇-biphenyl]-4-yl]diazenyl]-7-hydroxy-, disodium salt） （denoted as NPDA） into ZnAl-layered double hydroxides （LDHs） has been carried out by an anion- exchange method in an effort to improve their thermal stability and light fastness. After intercalation of NPDA anions, the interlayer distance of the LDHs increases from 0.87 to 2.18 nm, confirming their incorporation into the interlayer galleries of the LDHs host. Infrared spectroscopy and thermogravimetric analysis revealed the presence of host-guest interactions between LDHs layers and NPDA anions. The thermal stability of NPDA and ZnAI-NPDA-LDHs was compared by thermogravimetric-differential ther- mal analysis, UV-visible spectroscopy and infrared spectroscopy. It was found that the thermal stability of NPDA anions was markedly improved by incorporation into the ZnA1-LDHs matrix, while the light fastness was also enhanced.
ISSN:1674-2001
2210-4291
DOI:10.1016/j.partic.2011.12.004