Are there facilities to rent for sleeping during a long layover at Shenzhen airport?

Well, there is no hotel inside the terminal building. So you are suggested to stay at a hotel nearby.
7 Days Inn is recommended. The pricei is CNY 150 to 200 per night in usual time. It has clean living environment. The location is No.5, Aimin Road, Hourui Community. (close to Hourui Metro Station)
In addition, the transportation to/from airport is also convenience. Shuttle bus no.M416 operates between terminal building and Hourui Station. The duration is about 20 mins. Hope you like. :)