SI. 1. PXRD patterns of Mg/Al-NO3 (x = 0.33) LDH (a) before and (b) after
Iodide exchange.
006
(b)
003
Intensity (arb. units)
11
003
006
(a)
11
10
20
30
40
50
60
70
2θ (degrees)
The increase in the relative intensity of the 006 reflection relative to the 003 is an
indication of the increased electron density in the interlayer, resulting from the
incorporation of a heavy scatterer such as I- in the place of light atoms, NO3-. The
decrease in c-parameter from 8.9 Å to 8.2 Å is on account of substitution of NO3- in the
interlayer by I-.
SI. 2. IR spectrum of Mg/Al-NO3 (x = 0.33) LDH (a) before and (b) after I- exchange.
Transmittance (arb. units)
(b)
(a)
4000
3500
3000
2500
2000
1500
-1
Wavenumber (cm )
1000
500
SI 3. Br- uptake isotherms of Mg/Al-NO3 and Mg/Al-Cl LDHs
4
-
NO3 -LDH
3
1
-1
Br uptake (mmol g of LDH)
2
x = 0.33 LDH
x = 0.25 LDH
0
-
Cl -LDH
-
3
2
1
0
0.00
0.05
0.10
0.15
-
0.20
-1
Br concentration (mol L )
0.25
0.30