STRUCTURE OF ADSORPTION CENTERS ON A CARBOSIL SURFACE DEDUCED FROM H-1 NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY DATA OF ADSORBED BENZENE ANDWATER-MOLECULES

The structure of benzene and water adsorption complexes on a complex c arbon-silica adsorbent (carbosil) surface was studied by H-1 NMR spect roscopy. The adsorbent was obtained by pyrolysis of CH2Cl2 at 500 degr ees C on the surface of pyrogeneous silica (Aerosil-300). Disordered f ragments of graphite planes were found to be adsorption centers for be nzene molecules. Water molecules are sorbed on the residual hydroxyl g roups of silica as well as at oxygen-containing adsorption centers of the carbon material. The thicknesses of the solvation shells of benzen e and water of initial aerosil and carbon black particles were determi ned.