Journal of Microwave Power and Electromagnetic Energy (JMPEE)
TITLE	Microwave-Assisted Synthesis of ZN/AL Layered Double Hydroxide-(Anthraquinone-2,6-Disulfonate) Nanocomposite [PDF]
AUTHORS	M.Z. bin Hussein, Z. Zainal, T. Yun Hin and O.W. Sing Tat 2001 36 2 113-119
YEAR
VOLUME
ISSUE
PAGES
Abstract Nanocomposites of Zn/Al-layered double hydroxide-(anthraquinone-2,6-disulfonate) were synthesized by spontaneous direct assembly of inorganic and organic phases from aqueous solution. Powder X-ray diffraction patterns showed that a pure, single nanocomposite phase at good crystallinity was obtained using 1.0 M antraquinone-2,6-disulfonate ion (AQ26) and aging at 80°C using conventional heating for 7days or 0.5 h under microwave radiation, and these samples are denoted as ZAAN26C or ZAAN26MH, respectively. Zn/Al-nitrate-layered double hydroxide synthesized by a conventional method (ZANLC) showed a basal spacing of 8.3 Ǻ while both the nanocomposites showed 18.8 Ǻ as a result of AQ26 intercalation. FTIR study showed that the resulting nanacomposites are free from nitrate, the co-anion present in the mother liquor, indicating that only AQ26 is preferred during intercalation for the formation of the nanocomposite. The Brunauer, Emmet and Teller (BET) and micropore surface areas forZAAN26C decreased relative to the ZANLC from 16.2 to 4.7 and 1.6 to 1.3 m²/g, respectively. These results indicate that AQ26 can be rapidly interdcalated in layered double hydroxide using microwave aging resulting in a nanocomposite. Key Words: Microwave assisted synthesis, layered double hydroxide, hydrotalcite, nanocomposites, intercalation, anthraquinone-2-6-disulfonate, nitrate