Can i use hibiclens on a bad turf burn?

Yes. Should only need the 'turf' removed once, rinse off the Hibiclenz well. If "oozy" or in an area that will get agitated by clothes or movement (knees/elbows/etc.) then you may want to cover it with a sterile piece of gauze (4x4, non-stick dressing or similar) after putting a topical antibiotic (like triple antibiotic sold over the counter) on the wound, but do let the area get some air.