title: Preformed precursor of microporous aluminophosphate coating on mesoporous SBA-15: synthesis, characterization, and catalytic property for selective O-methylation of catechol.
abstract: 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.
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130023, China.
authors.forename: Xiangzhou
authors.initials: X
authors.lastname: Liao
authors.forename: Zhou
authors.initials: Z
authors.lastname: Zhou
authors.forename: Zhenlu
authors.initials: Z
authors.lastname: Wang
authors.forename: Xiujing
authors.initials: X
authors.lastname: Zou
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
authors.forename: Mingjun
authors.initials: M
authors.lastname: Jia
authors.forename: Wenxiang
authors.initials: W
authors.lastname: Zhang