span style="font-size:13.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA" lang="EN-US"Preparation and characterization of high surface area α-AlFsub3/sub/span

摘要

span style="font-size:9.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA" lang="EN-US"High surface area span style="font-size:9.0pt;font-family:Symbol;mso-ascii-font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";mso-bidi-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA;mso-char-type:symbol; mso-symbol-font-family:Symbol" lang="EN-US"img src='http://www.niscair.res.in/jinfo/Alpha.gif' border=0span style="font-size:9.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA" lang="EN-US"-AlFsub3/sub has been prepared by a carbon hard template method, Wherein img src='/image/spc_char/gamma2.gif' border=0-Alsub2/subOsub3/sub is immersed with sucrose aqueous solution and the dried mixture thermally treated under Nsub2/sub flow at 450 supo/supC to obtain the C@img src='/image/spc_char/gamma2.gif' border=0-Alsub2/subOsub3/sub. C@img src='/image/spc_char/gamma2.gif' border=0-Alsub2/subOsub3/sub can be completely transformed to C@span style="font-size:9.0pt;font-family:Symbol;mso-ascii-font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";mso-bidi-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA;mso-char-type:symbol; mso-symbol-font-family:Symbol" lang="EN-US"img src='http://www.niscair.res.in/jinfo/Alpha.gif' border=0span style="font-size:9.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA" lang="EN-US"-AlFsub3/sub with hydrogen fluoride at 400 supo/supC. After the carbon template in C@span style="font-size:9.0pt;font-family:Symbol;mso-ascii-font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";mso-bidi-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA;mso-char-type:symbol; mso-symbol-font-family:Symbol" lang="EN-US"img src='http://www.niscair.res.in/jinfo/Alpha.gif' border=0span style="font-size:9.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA" lang="EN-US"-AlFsub3/sub issub /subremoved by high temperature combustion, a high surface area span style="font-size:9.0pt;font-family:Symbol;mso-ascii-font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";mso-bidi-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA;mso-char-type:symbol; mso-symbol-font-family:Symbol" lang="EN-US"img src='http://www.niscair.res.in/jinfo/Alpha.gif' border=0span style="font-size:9.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA" lang="EN-US"-AlFsub3/sub (66 msup2/sup gsup-1/sup) is obtained. It is found that the fluorination process is crucial for the resulting span style="font-size:9.0pt;font-family:Symbol; mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman"; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA; mso-char-type:symbol;mso-symbol-font-family:Symbol" lang="EN-US"img src='http://www.niscair.res.in/jinfo/Alpha.gif' border=0span style="font-size:9.0pt;font-family:"Times New Roman";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US; mso-bidi-language:AR-SA" lang="EN-US"-AlFsub3/sub. Although high fluorination temperature is favorable to the formation of