Nanoporosity of MCM-41 Materials and Y-Zeolites Created by Deposition of Tournefortia hirsutissima L. Plant Extract

Table 3

Textural parameters of FAU-CBV zeolites and MCM-41 materials determined from N₂ adsorption before (S) and after being impregnated (I) with Tournefortia ethanolic extract.

Materials	m^2 g^−1		m^2 g^−1	m^2 g^−1	cm^3 g^−1	cm^3 g^−1	cm^3 g^−1	Pore diameter; BJH, Å
Before
CBV-100-S	670	−37	1018	38	0.395	0.335	0.06	51, 106
CBV-300-S	601	−55	882	31	0.326	0.291	0.035
CBV-400-S	604	−61	886	84	0.275	0.265	0.010
CBV-500-S	678	−61	994	127	0.414	0.284	0.130	72
CBV-600-S	529	−65	772	101	0.378	0.217	0.161
CBV-720-S	725	−80	1060	121	0.496	0.306	0.190	34
MCM-41-S	1009	52	1185	1009	0.777	0	0.777	24, 34
Impregnated
CBV-100-I	692	−53	1016	38	0.369	0.335	0.034
CBV-300-I	462	−56	680	44	0.267	0.214	0.053
CBV-400-I	604	−61	886	84	0.363	0.265	0.098	36, 103
CBV-500-I	678	−61	994	96	0.414	0.297	0.117
CBV-600-I	526	−65	772	101	0.378	0.217	0.161	36, 47, 151
CBV-720-I	725	−80	1060	124	0.496	0.304	0.192	36
MCM-41-I	286	78	415	286	0.309	0	0.309	36

is the specific surface area BET; is the specific surface area Langmuir; is the external surface area -method; is the BET constant; is the volume adsorbed close to saturation ( = 0.95), calculated as volume of liquid (Gursvitch rule); is micropore volume calculated by -plots; is mesopore volume; and Pore diameter BJH is the pore size estimated by BJH method.