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