  We investigate Higgs-radion mixing scenario through single radion
photoproduction process $pp\to p\gamma p\to pRqX$ at the LHC where $X$
represents the remnants of one of the initial protons. We consider high
luminosity values of $L_{int}=200\;fb^{-1}$, $500\;fb^{-1}$ and
$3000\;fb^{-1}$. We obtain bounds on the mixing parameter space by considering
$R\to \gamma\gamma$, $R\to W^+ W^-$ and $R\to ZZ$ decay channels of the radion
as the signal. We also perform a similar analysis for a 100 TeV future
proton-proton collider and compare its potential with that of LHC.
