{HEAD ~ 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 {TAIL ~ use} as a precursor 
for
{ HEAD ~ 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 { TAIL ~ use } as a precursor
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH