Open AccessA NEW METHOD TO STUDY THE HETEROGENEOUS ADSORPTION ON THE INTERFACES ON SURFACE ENHANCED RAMAN SCATTERING
Author(s) -
Liu Ye-Hou,
Fu Shi-You,
Pengxiang Zhang,
Xiuying Li,
Yunshan Wang
Publication year - 1993
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.42.1756
Subject(s) - adsorption , raman scattering , materials science , homogeneous , reaction rate constant , raman spectroscopy , kinetics , scattering , molecule , surface (topology) , chemical physics , chemical engineering , chemistry , analytical chemistry (journal) , thermodynamics , chromatography , optics , organic chemistry , physics , quantum mechanics , geometry , mathematics , engineering
A new method to study chemical adsorption kinetics by means of surface enhanced raman scattering is proposed. The theoretical model is proposed and experimental results given out. The adsorption of CV and PABA molecules on the surfaces of silver mirrors and silver colloids is studied. It is found that the adsorption of CV on silver surfaces is homogeneous, and the adsorption of PABA is heterogeneous. The differences of silver surfaces only influence the adsorption rate constant Ka, not changing the heterogeneity character of adsorption and desorp-tion rate constant (Kd=0). Finally, the significance of heterogeneity paramter is discussed.