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