燃料化学学报2013，Vol.41Issue(4)：456-462,7.
双酸体系下有序介孔SO42-/ZrO2-SiO2材料的合成
Synthesis of well-ordered SO42-/ZrO2-SiO2 materials in bi-acid system
摘要
Abstract
A series of solid acid SO42-/2r02-Si02 catalysts with a fixed Zr/Si molar ratio of I.I were successfully synthesized in one-pot through changing the H2S04/HCI volume ratio during the self-assembly process. X-ray diffraction (XRD), UV-visible DRS, and high resolution transmission electron microscopy (HRTEM) results demonstrate that all the resultant catalysts exhibit a highly ordered 2D hexagonal mesostructures with zirconia particles of homogenously distributed tetragonal nanocrystallites in mesoporous walls. N2 adsorption and pyridine in-situ Fourier-transformed infrared spectra (Fr-IR) further reveal that the surfacearea, pore volume, pore diameter and the relative strength of Lewis and BrOnsted acidic sites of resultant catalysts can be controlled by tuning the HZS04/HCI volume ratio during the synthesis.Different from pure mesoporous SBA-15 material,the mesoporous SO2/4'/2r02-Si02 materials prepared in this work exhibit high structural stability and catalytic activity in n-pentane isomerization,which is ttributed not only to hydrochloric acid that facilitates the formation of soporous silica but also to sulfuric acid that helps to stabilize the structure of catalysts and produce acid sites.The methods proposed in this work provide an important approach to synthesize ordered solid acid catalysts with high stability and potential applications rn various acidic-catalyzed reactions.关键词
氧化锆/介孔材料/一锅合成/异构化/固体酸催化Key words
zirconia/ mesoporous materials / one-pot synthesis/ isomerization/ solid acid catalyst分类
化学化工引用本文复制引用
于峰,郭敏,王旭,潘大海,李瑞丰..双酸体系下有序介孔SO42-/ZrO2-SiO2材料的合成[J].燃料化学学报,2013,41(4):456-462,7.基金项目
Supported by the Natural Science Foundation of China (NSFC,50772070,51172154),the Research Fund for the Doctoral Program of Higher Education (20121402120011) and the Science and technological program of Shanxi Province (20110008) （NSFC,50772070,51172154）
