Encapsulation of organic UV ray absorbents into layered double hydroxide for photochemical properties

• Published in: Materials letters Vol. 65; no. 19; pp. 2923 - 2926
• Main Authors: Khan, Sher Bahadar, Liu, Changzhi, Jang, Eui Soung, Akhtar, Kalsoom, Han, Haksoo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2011
• Subjects: Absorbents; absorption; air; castor oil; catalytic activity; Encapsulation; Fourier transform infrared spectroscopy; Hydroxides; Layered double hydroxide; Nanocomposites; Nanohybrid; Nanomaterials; Nanostructure; Optical properties; oxidation; Photochemical; Photochemical properties; Spectra; transmittance; UV absorbent; X-ray diffraction; Nanohybrid; UV absorbent; Layered double hydroxide; Optical properties; Photochemical properties
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2011.03.107

Organic–inorganic nanohybrids, 3,4-dihydroxycinnamic acid/layered double hydroxide (CA/LDH), 4-hydroxy-3,5-dimethoxycinnamic acid/layered double hydroxide (SA/LDH), and 3-amino-5-triflouromethylbenzoic acid/layered double hydroxide (FBA/LDH) have been synthesized by co-precipitation reaction of organic ultraviolet (UV) ray absorbents such as 3,4-dihydroxycinnamic acid, 4-hydroxy-3,5-dimethoxycinnamic acid, 3-amino-5-triflouromethylbenzoic and Zn 2Al layered double hydroxide (LDH). Detailed structural and absorption properties of the nanohybrids were studied by using X-ray diffraction (XRD), FT-IR and UV-Vis transmittance spectra which revealed that organic UV absorbents have been intercalated into the interlayer spaces of LDH and all nanohybrids showed excellent UV ray absorption. All the nanohybrids showed a lower catalytic activity as compared to the net organic UV ray absorbents by applying air oxidation to castor oil.