Supplementary Material (ESI) for Physical Chemistry Chemical Physics
This journal is (c) The Owner Societies 2010
Supplementary Information, Figure S1
Nitrogen adsorption isotherm of SBA-15-COOH
3
Volume adsorbed (cm /g, STP)
600
500
400
300
200
100
0
0.00
0.25
0.50
0.75
P/P0
t-plot of SBA-15-COOH (Micropore volume = 0.028 cm3/g)
1.00
Supplementary Material (ESI) for Physical Chemistry Chemical Physics
This journal is (c) The Owner Societies 2010
Nitrogen adsorption isotherm of Et-PMO-COOH
3
-1
Volume adsorbed (cm g , STP)
900
600
300
0
0.00
0.25
0.50
0.75
P/P0
t-plot of SBA-15-COOH (Micropore volume = 0.057 cm3/g)
1.00
Supplementary Material (ESI) for Physical Chemistry Chemical Physics
This journal is (c) The Owner Societies 2010
Supplementary Information, Figure S2.
Titration analysis
SBA-15-COOH and Et-PMO-COOH acidity capacity of anchored carboxylic groups were
evaluated by a pH-metric titration of the sample against a 0.05 M NaOH solution (previously
standardised by titration with potassium hydrogenphthalate) in presence of 1M NaCl. The first
derivative curve was used for computation of the acidity capacity.
Acid-base titration (NaOH) of SBA-15-COOH in the presence of NaCl 1M
11
pH
10
9
8
7
6
5
4
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
NaOH added (mmol/g)
Acid-base titration (NaOH) of Et-PMO-COOH in the presence of NaCl 1M
8
pH
7
6
5
4
0.0
0.2
0.4
0.6
0.8
1.0
NaOH added (mmol/g)
1.2
1.4
1.6