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

Zhu, H., Wang, L., Tang, P., Feng, Y., & Li, D. (2012). Improving thermal stability and light fastness of Acid Red 114 by incorporating its anions in a ZnAl-layered double hydroxides matrix. Particuology, 10(4), 503–508. https://doi.org/10.1016/j.partic.2011.12.004

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

Haifeng Zhu, Liren Wang, Pinggui Tang, Yongjun Feng, Dianqing Li^*

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

10.1016/j.partic.2011.12.004

Volume 10, Issue 4, August 2012, Pages 503-508

Received 30 August 2011, Revised 29 November 2011, Accepted 12 December 2011, Available online 10 April 2012.

E-mail: lidq@mail.buct.edu.cn

Highlights

► Acid Red 114 (NPDA)-incorporated ZnAl-LDHs were prepared by anion-exchange method.

► Intercalation of NPDA into LDHs significantly enhances its thermal stability.

► NPDA-incorporated ZnAl-LDHs has better light fastness than NPDA.

Abstract

Incorporation of anions of Acid Red 114 dye (1,3-naphthalenedisulfonic acid, 8-[2-[3,3′-dimethyl-4′-[2-[4-[[(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 ZnAl–NPDA–LDHs was compared by thermogravimetric-differential thermal analysis, UV–visible spectroscopy and infrared spectroscopy. It was found that the thermal stability of NPDA anions was markedly improved by incorporation into the ZnAl–LDHs matrix, while the light fastness was also enhanced.

Graphical abstract

Keywords

Layered double hydroxides; Anion-exchange; Incorporation; Thermal stability; Light fastness

文章导读