I currently have a domain network setup at home I have about 7 computers on my domain and two computers on a workgroup.
I was wondering if I can separate my wireless lan from my wired lan within my domain. but without losing communication and access to their shared drives.

So all my wireless computers can be on one segment and all wired computers can be on another segment. Even though some are on the domain and others are in a workgroup.

Can this be done? I do not have a VLAN switch.

This is my setup:
Modem connects to wireless Dlink Router... this connect to my gigabit switch which 4 domain computers are connected to.
All wireless domain and non-domain computers connect to my wireless router and access point which is connected to my switch.

Can this wired and wireless LAN segmentation be done?

Yes you can. Only one will act as the Internet access point so that you have only one gateway for Internet access.

Router 1 - Internet Router
WAN port connected to Internet modem using DHCP connection (or fixed if you have purchased a fixed address).
Network ID 192.168.0.0/24
IP address of router 192.168.0.1
Subnet Mask 255.255.255.0
DHCP Scope 192.168.0.50-100
Add static route for 192.168.1.0
Mask 255.255.255.0
Gateway 192.168.0.2

Router 2 - Wireless Access
WAN port connected to LAN port on Router 1
WAN port set to fixed address 192.168.0.2
Network ID 192.168.1.0/24
IP address of Router 192.168.1.1
Subnet Mask 255.255.255.0
DHCP Scope 192.168.1.50-100

Do not forget to go into Active Directory Sites and Services and add the second Subnet for your site.

If you want computers from both subnets to see AD and be able to logon to the domain, they will need to know of your DNS Server in AD. In both of your routers, add your AD DNS server as your primary DNS server. In AD DNS, add your ISP DNS servers as your DNS Forwarder and add the Root Hints.