title: In situ synthesis, characterization, and catalytic performance of tungstophosphoric acid encapsulated into the framework of mesoporous silica pillared clay.
abstract: Mesoporous silica pillared clay (SPC) incorporated with tungstophosphoric acid (HPW) has been synthesized via in situ introducing P and W source in the acidic suspension of the clay interlayer template during the formation of the silica pillared clay. The samples were characterized by XRD, XRF, FT-IR, TG-DTA, N(2) adsorption-desorption, and SEM techniques. The results showed that the HPW formed by in situ method has been effectively introduced into the framework of mesoporous silica pillared clay and its Keggin structure remained perfectly after formation of the materials. In addition, samples with similar HPW loadings were also prepared by impregnation method using SPC as the support. HPW in the incorporated samples was better dispersed into the silica pillared clay than in the impregnated samples. The results of catalytic tests indicated that the encapsulated materials demonstrated better catalytic performance than the impregnated samples in oxidative desulfurization (ODS) of dibenzothiophene (DBT).
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China. bsli@mail.buct.edu.cn
authors.forename: Baoshan
authors.initials: B
authors.lastname: Li
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Liu
authors.forename: Chunying
authors.initials: C
authors.lastname: Han
authors.forename: Wei
authors.initials: W
authors.lastname: Ma
authors.forename: Songjie
authors.initials: S
authors.lastname: Zhao
mesh_terms: D000538:Aluminum Silicates / Q000138:chemical synthesis / Q000737:chemistry; D002384:Catalysis; D000077215:Clay; D010316:Particle Size; D010756:Phosphoric Acids / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D017973:Tungsten Compounds / Q000737:chemistry*
chemical_list: C519880:12-tungstophosphoric acid; D000538:Aluminum Silicates; D010756:Phosphoric Acids; D017973:Tungsten Compounds; D012822:Silicon Dioxide; D000077215:Clay