Skip to main content

Table 3 EXAFS fitting results of Zn for model compounds and sorption samples (S 20  = 0.85)

From: Competitive sorption of Ni and Zn at the aluminum oxide/water interface: an XAFS study

Sample Shells CN R (Å) σ22) Rf ΔE0 (ev)
Zn(NO3)2 aq. Zn–O 6.0a 2.06 0.006 0.0002 1.16
Zn–Al LDH Zn–O 6.5 2.08 0.008   0.89
  Zn–Zn 3.5 3.10 0.010 0.0005  
  Zn–Al 2.4 3.09 0.010   
Zn-Ni–Al LTH Zn–O 6.6 2.08 0.008   2.85
  Zn–Zn/Ni 4.6 3.08 0.010 0.0010  
  Zn–Al 1.6 3.07 0.010   
Zn–Al Alox Zn–O 6.2 2.06 0.009   1.23
  Zn–Zn 4.3 3.09 0.010 0.0015  
  Zn–Al 2.4 3.08 0.010   
Zn–Ni–Al Alox Zn–O 6.9 2.08 0.010   1.182
  Zn–Zn/Ni 5.3 3.09 0.011 0.0018  
  Zn–Al 1.4 3.08 0.011   
  1. Estimated errors for the first shell are ± 20% for coordination number, ± 0.01 Å for bond distance and ± 0.001 Å2 for Debye–Waller factors, and for second shell ± 40% for coordination numbers, ± 0.04 Å for bond distances and ± 0.005 Å2 for Debye–Waller factors
  2. CN coordination number and were determined by the fit, R the interatomic distance in Å, σ2 the Debye–Waller factor in Å2, R f the absolute misfit between data and theory, ΔE 0 the energy shift in eV
  3. aFixed value
\