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以四水乙酸镁为前驱体,以大米粉形成的凝胶为模板,采用新的凝胶-模板法制各了一系列的氧化镁材料,并用X射线衍射、扫描电镜、低温氮气吸附-脱附、X射线荧光分析、热重-差示扫描量热、CO2程序升温脱附和氨程序升温脱附等手段对样品进行了表征.该方法主要利用大米粉在水中加热形成凝胶来分散镁盐前驱体,再通氧焙烧去除模板从而获得多孔MgO材料.结果表明,制得的MgO具有高比表面积(可达206m2/g)和双介孔结构(孔径分别位于3.9和5~40nm附近).与直接焙烧四水乙酸镁制得的MgO相比,这类新型高比表面积MgO具有较多的强碱位和较少的酸性位,并在异丙醇催化分解反应中表现出更高的丙酮收率和选择性,有望成为一类优良的固体碱催化剂.

参考文献

[1] Aramendia M A;Borau V;Jimenez C;Marinas J M,Ruiz J R,Urbano F J .[J].Applied Catalysis A:General,2003,244:207.
[2] Xu B Q;Wei J M;Wang H Y;Sun K Q,Zhu Q M .[J].Catalysis Today,2001,68:217.
[3] Klabunde K J;Stark J;Koper O;Mohs C,Park D G,Decker S,Jiang Y,Lagadic I,Zhang D J .[J].Journal of Physical Chemistry,1996,100:12142.
[4] Ranjit K T;Klabunde K J .[J].Chemistry of Materials,2005,17:65.
[5] Yu J C;Xu A W;Zhang L Zh;Song R Q,Wu L .[J].Journal of Physical Chemistry B,2004,108:64.
[6] Martin, ME;Narske, RM;Klabunde, KJ .Mesoporous metal oxides formed by aggregation of nanocrystals. Behavior of aluminum oxide and mixtures with magnesium oxide in destructive adsorption of the chemical warfare surrogate 2-chloroethylethyl sulfide[J].Microporous and Mesoporous Materials,2005(1/3):47-50.
[7] Kim J Y;Jung H S;Hong K S .[J].Journal of the American Ceramic Society,2005,88:784.
[8] Cushing B L;Kolesnichenko V L;O'Connor C J .[J].Chemical Reviews,2004,104:3893.
[9] Li W C;Lu A H;Weidenthaler C;Schüth F .[J].CHEMISTRY OF MATERIALS,2004,16:5676.
[10] 刘水刚,黄世勇,李军平,赵宁,魏伟,孙予罕.活性炭模板制备的多孔固体碱催化酯交换反应[J].石油化工,2007(12):1250-1254.
[11] Lee J;Park Y;Kim P;Kim H,Yi J .[J].Journal of Materials Chemistry,2004,14:1050.
[12] Knozinger E;Diwald O;Sterrer M .[J].Journal of Molecular Catalysis A:Chemical,2000,162:83.
[13] 张志刚,袁媛,刘昌胜.溶胶-凝胶法制备纳米氧化镁[J].硅酸盐学报,2005(08):968-974.
[14] 孙瑞琴,周徐,孙林兵,吴昊,淳远,须沁华.以松木为模板研制高比表面积MgO固体强碱[J].高等学校化学学报,2007(12):2333-2337.
[15] Sun R Q;Sun L B;Chun Y;Xu Q H,Wu H .[J].Microporous and Mesoporous Materials,2008,111:314.
[16] Singh M;Yee B M .[J].Journal of the European Ceramic Society,2004,24:209.
[17] Kruk M;Jaroniec M .[J].CHEMISTRY OF MATERIALS,2001,13:3169.
[18] Hathaway P E;Davis M E .[J].Journal of Catalysis,1989,116:263.
[19] Aramendia MA.;Jimenez C.;Marinas JM.;Porras A.;Urbano FJ.;Borau V. .MAGNESIUM OXIDES AS BASIC CATALYSTS FOR ORGANIC PROCESSES STUDY OF THE DEHYDROGENATION-DEHYDRATION OF 2-PROPANOL[J].Journal of Catalysis,1996(2):829-838.
[20] Wang J.A. .Effects of the surface structure and experimental parameters on the isopropanol decomposition catalyzed with sol-gel MgO[J].Journal of molecular catalysis, A. Chemical,1999(0):291-300.
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