XANES STUDY OF TI AND FE SUBSTITUTED SILICALITES IN PRESENCE AND IN ABSENCE OF NH3 AND COMPARISON WITH UV-VIS, IR AND RAMAN-SPECTRA

被引：29

作者：

BORDIGA, S

GEOBALDO, F

LAMBERTI, C

ZECCHINA, A

BOSCHERINI, F

GENONI, F

LEOFANTI, G

PETRINI, G

PADOVAN, M

GEREMIA, S

VLAIC, G

机构：

[1] DIPARTIMENTO CHIM INORGAN CHIM FIS & CHIM MAT,I-10125 TURIN,ITALY

[2] IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY

[3] CTR RIC ENICHEM BOLLATE,I-20021 BOLLATE,ITALY

[4] SINCROTRONE TRIESTE,I-34012 TRIESTE,ITALY

[5] DIPARTIMENTO SCI CHIM,TRIESTE,ITALY

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1995年 / 97卷 / 1-4期

关键词：

D O I：

10.1016/0168-583X(94)00349-1

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The effects on the local environment of metal centres in Ti- and Fe-silicalites, induced by a vacuum treatment and by subsequent NH3 dosage, has been studied by means of XANES and UV-vis spectroscopies. The Ti(TV) environment is mainly tetrahedral in vacuo and becomes octahedral after interaction with NH3. Fe(III) is in tetrahedral coordination in presence of adsorbates, while in vacuo it is in a distorted tetrahedral symmetry. These conclusions are qualitatively supported by IR and Raman data.

引用

页码：23 / 27

页数：5

共 14 条

[1] REACTIONS OF TITANIUM SILICALITE WITH PROTIC MOLECULES AND HYDROGEN-PEROXIDE [J].