欢迎登录材料期刊网

材料期刊网

高级检索

对用溶胶-凝胶法制备的HSiW-SiO2催化剂,首先由红外光谱和紫外漫反射光谱发现钨硅酸Keggin结构中4种特征的氧键依然存在,从而证明制备的HSiW-SiO2催化剂中,钨硅酸活性中心依然保持Keggin结构.在此基础上对用溶胶-凝胶法制备的HSiW-SiO2和用浸渍法制备的HSiW/SiO2进行了水相中钨硅酸流失率考察,结果表明,HSiW-SiO2催化剂的流失率基本保持在0.94%~1.O7%,而HSiW/SiO2催化剂的流失率为3.27%,两者相差3倍多,从而证明用溶胶-凝胶法制备的负载型钨硅酸催化剂能够更好地防止钨硅酸活性中心在水相反应中的流失.

参考文献

[1] G.Romanelli;P.Vazquez;L.Pizzio;N.Quaranta;J.Autino;M.Blanco;C.Caceres .Phenol tetrahydropyranylation catalyzed by silica-alumina supported heteropolyacids with Keggin structure[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2004(2):163-170.
[2] Arabi M et al.Esterification of phthalic anhydride with 1butanol and 2-ethylhexanol catalyzed by heteropolyacids[J].J Molecular Cataly A:Chemical,2003,200(1-2):105.
[3] Song in K et al.Bulk properties of heteropolyacids determined from surface properties of nanostructured heteropolyacid monolayers[J].J Molecular Cataly A:Chemical,2002,182-183(01):185.
[4] Toshio O .New catalytic functions of heteropoly compounds as solid acids[J].Catalysis Today,2002,73(02):167.
[5] 吴越;叶兴凯;杨向光 等.杂多酸的固载化--关于制备负载型催化剂的一般原理[J].分子催化,1996,10(04):3006.
[6] Biju M.Devassy;S.B.Halligudi .Zirconia-supported heteropoly acids: Characterization and catalytic behavior in liquid-phase veratrole benzoylation[J].Journal of Catalysis,2005(2):313-323.
[7] Haixia Li;Hengbo Yin;Tingshun Jiang .Cyclodehydration of 1,4-butanediol to tetrahydrofuran catalyzed by supported silicotungstic acid[J].Catalysis Communications,2006(10):778-782.
[8] Sawant D P;Halligudi S B .Alkylation of benzene with α-olefins over zirconia supported 12-silicotungstic acid[J].J Molecular Cataly A:Chemical,2005,237(1-2):137.
[9] Staiti P .Proton conductive membranes based on silicotungstic acid/silica and polybenzimidazole[J].Materials Letters,2001,47(4-5):241.
[10] 罗云飞,孙建伟,李全芝.HEMT沸石负载12-钨硅酸对异丁烷与丁烯烷基化反应的催化性能[J].催化学报,2001(06):550-554.
[11] Ivan Kozhevnikov;唐培堏.精细化学品的催化合成:多酸化合物及其催化[M].北京:化学工业出版社,2005:10.
[12] 王子忱;王莉伟;赵敬哲 等.沉淀法合成高比表面积超细SiO2[J].无机材料学报,1997,12(03):391.
[13] Michael J.Janik;Robert J.Davis;Matthew Neurock .The relationship between adsorption and solid acidity of heteropolyacids[J].Catalysis Today,2005(1):134-143.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%