The photocatalytic reaction of model pollutants can be well
described by the LangmuireHinshelwood (LeH) kinetic model. The
rate of a unimolecular surface reaction, R, is proportional to the
surface coverage, q, when the reactant is more strongly adsorbed on
the surface than the products. The LangmuireHinshelwood rate
expressionwas applied for heterogeneous photocatalytic reduction
using TCF to determine the relationship between the initial reaction
rate and the initial concentration of Cr(VI). The LeH model express