2009
DOI: 10.1016/j.micromeso.2009.04.035
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Effect of heteroatom doping on surface acidity and hydrophilicity of Al, Ti, Zr-doped mesoporous SBA-15

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Cited by 51 publications
(34 citation statements)
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“…Nevertheless, only a few research endeavors have been focused on investigations dealing with the effect of the zirconium precursor on the properties (textural, acid, and/or catalytic) of Zr-SBA-15 systems. [19] A majority of the reports to date have randomly used zirconyl chloride [18][19][20][21][22][23] (ZrOCl 2 ·8 H 2 O) and zirconyl nitrate [24] [ZrO(NO 3 ) 2 ·xH 2 O], zirconium propoxide in propanol [19,25] [Zr(OPr) 4 ], or zirconium nitrate [26] [Zr(NO 3 ) 4 ·3 H 2 O] as metal sources. Interestingly, the choice of the metal precursor has subsequently been reported to exert a dramatic influence on the efficiency of its incorporation and on the accessibility of the final supported zirconium species.…”
Section: Introductionmentioning
confidence: 99%
“…Nevertheless, only a few research endeavors have been focused on investigations dealing with the effect of the zirconium precursor on the properties (textural, acid, and/or catalytic) of Zr-SBA-15 systems. [19] A majority of the reports to date have randomly used zirconyl chloride [18][19][20][21][22][23] (ZrOCl 2 ·8 H 2 O) and zirconyl nitrate [24] [ZrO(NO 3 ) 2 ·xH 2 O], zirconium propoxide in propanol [19,25] [Zr(OPr) 4 ], or zirconium nitrate [26] [Zr(NO 3 ) 4 ·3 H 2 O] as metal sources. Interestingly, the choice of the metal precursor has subsequently been reported to exert a dramatic influence on the efficiency of its incorporation and on the accessibility of the final supported zirconium species.…”
Section: Introductionmentioning
confidence: 99%
“…Such skills were previously discussed for the incorporation of Al 76, 77, and transition metals 78. These authors still point out that the incorporation of these metals is important for the formation of active sites due to the isomorphic substitutions of atoms of silicon by electropositive metals in tetrahedral structures, accompanied by negative charge effects generating Bronsted′s basicity.…”
Section: Resultsmentioning
confidence: 94%
“…The formation of cyclic (12,14,16,19,20,21) and aromatic compounds (15,22) in Zone B is likely due to charring reactions promoted by the acidic sites of SBA-15-L [27]. Intimate contact due to the interaction between the polymer molecules and acidic sites is essential for the progression of these charring processes [28].…”
Section: Identification Of Thermal Degradation Products and Possible mentioning
confidence: 99%