| .FACTORS INFLUENCING THE LOADING OF SUPPORTED MATERIAL IN THE PREPARATION OF Fe/TiO_2 CATALYSTS[J].分子催化,1989,(Z1): |
| FACTORS INFLUENCING THE LOADING OF SUPPORTED MATERIAL IN THE PREPARATION OF Fe/TiO_2 CATALYSTS |
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| The impregnations of different kinds of titania support with aqueous solution or ferricions at various pH values and with the solution of these ions in a polar aprotic solvent,dimethylformamide(DMF),were invcstigated.The results suggest that the surface ofhydrated titania is amphoteric,and has the function of a cationic exchanger,its ion ex-change properties arc dependent on the pH of the impregnating solutions.The higher theconcentration of metal ions in the impregnating solution and the more polar thc solvent,thehigher the loading on the support material having thc higher degree of crystallinity and alarger surface area without any pretreatments such as dehydration and calcination. |
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