Oxidation of diphenylmethanol to benzophenone

I'm looking for a reliable procedure for an undergraduate organic lab experiment: oxidation of diphenylmethanol to benzophenone.  I am updating our lab experiments and was thinking about introducing phase transfer catalysis, linked to a 2-step Grignard synthesis ( bromobenzene --> phenylmagnesium bromide  -->  diphenylmethanol  --> benzophenone).  I have found a JChem Ed paper that sug