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OALib Journal期刊
ISSN: 2333-9721
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双酸体系下有序介孔so42-/zro2-sio2材料的合成
, PP. 456-462
Keywords: 氧化锆,介孔材料,一锅合成,异构化,固体酸催化
Abstract:
？采用一锅合成法通过调变自组装过程中硫酸和盐酸的体积比,成功制备了系列介孔so42-/zro2-sio2固体酸材料(zr/si物质的量为1.1).xrd、uv-visdrs、hr-tem等表征结果表明,所得材料均具有高度有序的二维介孔结构及四方相氧化锆的晶体结构.氮吸附和ft-ir表征结果进一步发现,通过改变硫酸/盐酸体积比可有效调变材料比表面积、孔容、孔径及表面l酸与b酸的相对强度.与纯硅介孔分子筛sba-15不同,此系列so42-/zro2-sio2固体酸材料均在正戊烷的异构化反应中表现出较高的催化活性和稳定性.其原因在于,在合成过程中硫酸的加入不仅促使了酸基的形成,而且稳定了催化剂的晶体结构;盐酸的存在则保持了有序的介孔结构.由此可见,混酸合成体系有望制备出结构有序、酸性可调、催化性能优越的新型催化材料,并在众多酸催化反应中取得应用.
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