Nano- and microsized zeolites as a perspective material for potentiometric biosensors creation

Table 1 Molar compositions, synthesis conditions, Si/Al ratio, and particle diameters of zeolite samples

Zeolite type	Composition	Synthesis conditions	Si/Al ratio (crystal)a	Particle size (μm)b
BEA-30	1,92Na₂O:Al₂O₃:30SiO₂:4,6(TEA)2O:444H₂O	120°C, 7 days	9.7 ± 1.0	Approximately 0.4
BEA-40	1,92Na₂O:Al₂O₃:40SiO₂:4,6(TEA)2O:444H₂O	120°C, 7 days	13.5 ± 1.4	Approximately 0.4
BEA-50	1,92Na₂O:Al₂O₃:50SiO₂:4,6(TEA)2O:444H₂O	120°C, 7 days	17.7 ± 1.8	Approximately 0.4
LTA-4	1,94Na₂O:Al₂O₃:0,84SiO₂:194H₂O:1TEA	100°C, 2 days	0.84*	4
LTA-9	1,94Na₂O:Al₂O₃:0,84SiO₂:194H₂O:2TEA	100°C, 3 days	0.84*	9
LTA-22	1,94Na₂O:Al₂O₃:0,84SiO₂:194H₂O:4TEA	100°C, 5 days	0.84*	22

^aSi/Al ratios were measured from EDX; ^bParticle sizes were measured from SEM images. ^*Si/Al ratios in the gel.