Liao Xiangzhou, Zhou Zhou, Wang Zhenlu, Zou Xiujing, Liu Gang, Jia Mingjun, Zhang Wenxiang
College of Chemistry, Jilin University, Changchun, 130023, China.
J Colloid Interface Sci. 2007 Apr 1;308(1):176-81. doi: 10.1016/j.jcis.2006.12.039. Epub 2006 Dec 16.
The synthesis of mesoporous SBA-15 coated with the preformed precursor of microporous aluminophosphate (AlPO) has been reported. The physicochemical properties of the coated samples were investigated by using XRD, FT-IR, N(2)-adsorption, ICP, (29)Si MAS NMR, NH(3)-TPD and CO(2)-TPD. The characterization results suggest that the nanometer-scaled zeolite units are present on the wall surface of SBA-15, thus bringing the weak acid-base characteristics to the resulting mesoporous materials, and that the acid-base properties of these materials can be modified by the aging treatment in glycol. Moreover, vapor-phase O-methylation of catechol with methanol has been studied on these coated samples as catalysts. It is found that the coated sample bearing suitable weak acid-base sites exhibits the relatively high activity and selectivity to guaiacol.
已有报道合成了涂覆有微孔磷酸铝（AlPO）预制前驱体的介孔SBA-15。通过XRD、FT-IR、N₂吸附、ICP、²⁹Si MAS NMR、NH₃-TPD和CO₂-TPD对涂覆样品的物理化学性质进行了研究。表征结果表明，纳米级沸石单元存在于SBA-15的壁表面，从而赋予所得介孔材料弱酸-碱特性，并且这些材料的酸碱性质可通过在二醇中进行老化处理来改性。此外，还研究了以这些涂覆样品为催化剂，邻苯二酚与甲醇的气相O-甲基化反应。发现具有合适弱酸-碱位点的涂覆样品对愈创木酚表现出相对较高的活性和选择性。
