Preparation and Characterization of Al-pillaredClay Supported SO₄^2-/TiO₂ Solid Superacid

Jiang Yuexiu, Tong Zhangfa^*, Mo Yunfen, Chen Jinmei, Chen Xiaomei
(School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004)

Abstract SO₄^2-/TiO₂/A1-PILC (SO₄^2-/TiO₂/A1-pillared clay) solid superacid was prepared by loading active component SO₄^2-/TiO₂ on A1-pillared clay. The texture structure and surface properties of SO₄^2-/TiO₂/A1-PILC were studied by means of X-ray powder diffraction (XRD),the adsorption of N₂, Hammett indicator method, X-ray photoelectron spectroscopy (XPS) and FT-IR spectra of absorbed pyridine technique respectively. The results indicated that Al-PILC carrier can inhibit the formation of anatase TiO₂ and the transformation of anatase TiO₂ into rutile TiO₂. Compared to SO₄^2-/TiO₂, SO₄^2-/TiO₂/A1-PILC has larger surface area, more acid sites and lower acid strength.
Key words A1-pillared clay, Solid superacid, Characterization, Preparation

蒋月秀 童张法^* 莫云芬 陈金梅 陈小梅
(广西大学化学化工学院 南宁 530004)

摘要 将超强酸SO₄^2-/TiO₂负载于铝交联膨润土(A1-PILC)，制备了SO₄^2-/TiO₂/A1-PILC超强酸催化剂，并采用XRD、低温N₂吸附法、Hammett指示剂法、XPS及吡啶吸附红外光谱等方法对其进行了结构和表面性能的表征。测定结果表明，SO₄^2-/TiO₂负载于载体A1-PILC后,TiO₂的晶化及晶相转化受到抑制；与SO₄^2-/TiO₂相比，SO₄^2-/TiO₂/A1-PILC的比表面增大，总酸量增加；酸强度减小。
关键词 铝交联膨润土 固体超强酸 表征 制备

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