Figure 4.

A. IR spectra of molybdenum modified with ODHA showing bidentate bonding with peaks centered at 1314 (ν_CO), 1444 and 1556 cm−1 (ν_COO⁻_symm, ν_COO⁻_asymm respectively) and 1346 cm-1 for(ν_C–N). B. IR spectrum of SS316L modified with ODSA with peaks centered at ν_SOasym= 1174 cm⁻¹, ν_SOsym = 1068 cm⁻¹ and ν_C–S= 798 cm⁻¹.