| Organic colorants have been widely used for paints, inks, plastics, textile, paper, food, medicine and cosmetic because of their bright color, abundant varieties and decentralization. Their poor thermo- and photo-stability, however, has seriously hindered their application fields. Therefore, it is an important issue to explore novel colorants with higher thermo- and photo-stability as required for practical applications.In this paper, we synthesized ZnAl-DHSB-LDHs, ZnAl-ACDS-LDHs and ZnAl-HSSC-LDHs by the method involving separate nucleation and aging steps (SNAS), anion-exchange method and coprecipitation method.Three prepared samples were fully characterized by various techniques such as XRD, FT-IR, TG-DTA, TEM, SEM and ICP. The results show that these samples have a supramolecular structure with their corresponding chemical compositions [Zn0.67Al0.33(OH)2](DHSB)0.17·0.76H2O, Zno.65Al0.35(OH)2](ACDS)0.35·0.14H20 and [Zn0.74Al0.26(OH)2](HSSC)0.08·0.55H2O and the average particle size is 50 nm, 120 nm and 100 nm, respectively.Besides, the thermo- and photo-stability of these three samples were investigated in detail. The results suggest that the prepared inorganic-organic pigments have higher thermo- and photo-stability than the related dye species before intercalation due to the host-guest interaction. |
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