ONE-POT CONVERSION OF CARBONATE-TYPE LDH (LAYERED DOUBLE HYDROXIDE) INTO ORGANO-LDH HYBRIDS CONTAINING ORGANIC SULFATE AND SULFONATES BY APPLYING ACETATE BUFFER DECARBONATION METHOD

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A carbonate-type layered double hydroxide (CO_3^<2->LDH) was converted into organic sulfate and sulfonate/ LDH hybrids (org-LDHs) by decarbonation using an acetate buffer. A CO_3^<2->LDH suspension in a mixed solution of acetate buffer, and an organic sulfate or sulfonate salt was stirred at room temperature for 1 day under N_2 flow. The organic anions - dodecyl sulfate (DS), dodecyl benzene sulfonate (DBS), octane sulfonate (OS) and p-toluene sulfonate (PTS) - were used as the intercalants. Carbonate-type MgAl-LDH with Mg/Al = 1.86 was used as the initial CO_3^<2->LDH. The organic anions were successfully incorporated into the MgAl-LDH interlayer without any appreciable remaining CO_3^<2-> contamination, and the morphology of the initial CO_3^<2->LDH was retained. Only for DS, several % of remaining CO_3^<2-> was observed, but by addition of NaClO_4, full incorporation of DS was attained.