Influence of Synthesis Conditions on the Physicochemical Properties and Catalytic Activity of Fe/Cr-Pillared Bentonites

Table 1

Preparative conditions and nomenclature of the solids obtained.

Nomenclature	Fe/Cr ratio	Fe/Fe + Cr ratio	Aging of pillaring solution	Intercalation
Fe/Cr0.75	15 : 5	0.75	Fe/Cr pillaring solution aged for 24 h at room temperature	Fe/Cr pillaring solution slowly added to 2% bentonite suspension and aged for 24 h at room temperature
Fe/Cr0.75(D)	15 : 5	0.75	Fe/Cr pillaring solution sonicated for 30 minutes at 35 Hz and 75°C	Dry clay directly added to Fe/Cr-pillaring solution sonicated for 30 minutes at 35 Hz and 75°C
Fe/Cr0.75(CS)	15 : 5	0.75	Fe/Cr pillaring solution sonicated for 30 minutes at 35 Hz and 75°C	Dry clay slowly added to Fe/Cr-pillaring solution sonicated for 30 minutes at 35 Hz and 75°C
Fe/Cr0.75(SS)	15 : 5	0.75	Fe/Cr pillaring solution sonicated for 30 minutes at 35 Hz and 75°C	Fe/Cr pillaring solution slowly added to 2% bentonite suspension sonicated for 30 minutes at 35 Hz and 75°C
Fe/Cr0.25(D)	5 : 15	0.25	Fe/Cr pillaring solution sonicated for 30 minutes at 35 Hz and 75°C	Dry clay directly added to Fe/Cr-pillaring solution sonicated for 30 minutes at 35 Hz and 75°C