Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 377, Issue -, Pages 334-341Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2012.03.067
Keywords
In situ synthesis; Tungstophosphoric acid; Montmorillonite; Silica pillared clay; Catalytic oxidative desulfurization
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Funding
- National Basic Research Program of China (973 Program) [2011CBA00506]
- State Key Laboratory of Chemical Resource Engineering
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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). (C) 2012 Elsevier Inc. All rights reserved.
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