Am coming frm Dubai & have 8hrs to wait for my flight to Sydney Is there a hotel close to PEK?

There is an hourly charge lounge inside the airport. You can dial their hotline 010-64598943 for detailed information.
Besides, you can also find a hotel near the crossing of Gangshan Road and Nanping Street. As I know, it may charge CNY170-280/night for a standard room.