Profiles.arizona.edu is a great resource for researching faculty members.
If you have already identified a faculty member you're interested in working with, you can use the profiles site to look them up. You can learn more about their educational background and see a list of all of their scholarly publications. It's always important to do a little research on a faculty member before you meet with them for the first time so can ask them some informed questions about their work.
If you're looking for a faculty member doing research you're interested in the profiles website is also a good resource. You can do a keyword search on research topics and see which faculty are working in that area based upon their biographic information and list of publications.