Abstract
The Acid Blue 25 (1-amino-9,10-dihydro-9,10-dioxo-4-(phenylamino)-2-anthracenesulphonate) anion intercalated layered double hydroxides (LDH) film was fabricated through an ion-exchange method using a ZnAl–NO3–LDH/porous anodic alumina/aluminum (PAO/Al) film as the precursor. The prepared film was investigated by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Thermogravimetric–differential thermal analysis (TG–DTA) and the CIE 1976L⁎a⁎b⁎ color difference method. XRD patterns and FT-IR spectra confirm the successful incorporation of ADPA anions into the interlayer spacings of ZnAl–LDH with an expansion of d-spacing from 0.87nm to 2.49nm and the disappearance of characteristic IR absorption band of NO3− anions at 1384cm−1. The SEM morphologies show that the LDH films are mainly oriented with the ab face of the platelet crystallites perpendicular to the substrate surface. Additionally, the obtained results suggest that the intercalation of ADPA into ZnAl–LDH host markedly improves the thermal stability and light fastness of ADPA.
Published Version
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