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Activated charcoal obtained from grape marc (GMAC) was impregnated by TiO2 anatase to form GMAC/TiO2 hybrid. The synthesized hybrid was used in the photodegradation of reactive black 5 (RB5). The degradation products were commonly characterized from the dye solution; neglecting the traces adsorbed on the surface of the catalyst. In the present work, we targeted to follow the degradation products both on the surface of GMAC/TiO2 hybrid by FT-IR spectroscopy and in the RB5 solution by UV-visible, after exposure to UV light during various time periods. The analysis of the hybrid surface revealed the presence of degradation species including carboxylic and sulfate groups. [ABSTRACT FROM AUTHOR]

Abstract: A full quantum theoretical model is proposed to study the ν O–H experimental IR line shapes of polarized crystalline glutaric and 1-naphthoic acid dimer crystals at room and liquid nitrogen temperatures. This work is an application of a previous model [M. E-A. Benmalti, D. Chamma, P. Blaise, and O. Henri-Rousseau, J. Mol. Struct. 785 (2006) 27–31] by accounting for Fermi resonances. The approach is dealing with the strong anharmonic coupling, Davydov coupling, multiple Fermi resonances between the first harmonics of some bending modes and the first excited state of the symmetric combination of the two ν O–H modes and the quantum direct and indirect relaxation. Numerical results show that mixing of all these effects allows to reproduce satisfactorily the main features of the experimental IR line shapes of crystalline hydrogenated and deuterated glutaric and 1-naphthoic acid crystals and are expected to provide efficient of Fermi resonances effects. [Copyright &y& Elsevier]