The filtered material is dried at 110° C. for 15 hours or heated at 400 550° C. for 5 10 hours to prepare it for {HEAD ~ use} as {TAIL ~ a precursor} 
as
The filtered material is dried at 110 ° C. for 15 hours or heated at 400 550 ° C. for 5 10 hours to prepare it for { HEAD ~ use } as { TAIL ~ a precursor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL