What you need is a black seamless backdrop. You can buy a photo-oriented one or make one yourself (depending in the subject's size) from DIY art supplies. The seamless is usually long enough so it covers the floor as well as the back wall, and such that there is no "corner" in the connection between the floor and wall parts - just a smooth transition.

Additionally, if you are shooting in a relatively dark space, using strobes or flashes, then the inverse square law comes to your help and you can do with a dark, but not necessarily black background if you place it far enough from your subject.

Update - as for the material, really anything that is big and flexible enough can do. In the image below you can see a similar setup, only made with white background instead of black. The seamless was merely my window's blind...

![enter image description here][1]


  [1]: https://i.sstatic.net/bBTx3.jpg