In fact, the L-H model is only a kinetic model
based on the ideal adsorption, but it is more complicated
for actual reaction, especially for gas phase reaction.
Moreover, most of study on photocatalytic
degradation kinetics paid attention to the effect of a
single factor only, meanwhile ignoring the role of
multiple factors. In addition, the values of k and K in
the L-H model are related with many factors, so it is
difficult to use a general mathematical equation to
describe the photocatalytic kinetics, and the reaction
order may change in different reaction stages. If describing
the whole reaction process with a fixed model,
significant deviation from the real kinetics would be
inevitable [17].