Table 1. Crystal and textural properties of the H-S@MgAl-LDH and H-S@CZMA-LDHs after five successive iterations of calcination–reconstruction with a 15 mM CuZn-containing solution.
Sample | LDH lattice parametersa [nm] | LDH d(003) [nm] | LDH crystallite sizeb [nm] | S BET [m2 g−1] | V micro [cm3 g−1] | V meso [cm3 g−1] | V total [cm3 g−1] | ||
---|---|---|---|---|---|---|---|---|---|
a | c | D (003) | D (110) | ||||||
H-S@MA-LDH | 0.3049 | 2.308 | 0.769 | 7.9 | 17.9 | 224 | 0.008 | 0.66 | 0.89 |
H-S@CZMA-LDH_R1 | 0.3062 | 2.318 | 0.773 | 13.9 | 15.0 | 163 | 0.009 | 0.68 | 0.67 |
H-S@CZMA-LDH_R2 | 0.3061 | 2.318 | 0.773 | 9.8 | 9.2 | 157 | 0.012 | 0.70 | 0.66 |
H-S@CZMA-LDH_R3 | 0.3065 | 2.312 | 0.771 | 15.8 | 9.9 | 158 | 0.012 | 0.74 | 0.73 |
H-S@CZMA-LDH_R4 | 0.3067 | 2.306 | 0.769 | 14.8 | 10.9 | 158 | 0.010 | 0.75 | 0.74 |
H-S@CZMA-LDH_R5 | 0.3073 | 2.302 | 0.767 | 14.2 | 13.5 | 179 | 0.002 | 0.66 | 0.74 |
a = 2d110, c = 3d003.
Crystallite size of LDH in stacking or plane direction (D(003) and D(110), respectively), calculated according to Scherrer equation: D(hkl) = 0.9 × λ/(β × cos θ), λ = 0.154 nm, θ is the position (deg.), and β is the FWHM (rad.) of the Bragg diffraction peaks.