Structural, textural and acidic properties of Cu-, Fe- and Cr-doped Ti-pillared montmorillonites
Source abstract
Abstract
Montmorillonite has been treated with Ti-based solutions, alone or doped with Cu2 +, Fe3 + or Cr3 + cations, yielding new intercalated solids, which have been calcined at various temperatures to test the stability of the so-formed pillars. The solids calcined at 500 ?C were fully characterized by chemical analysis, X-ray diffraction, FT-IR spectroscopy, thermal analyses, nitrogen adsorption and acidity evaluation. The evolution of the specific surface area, porosity and acidic properties is discussed, analysing the effect of pillaring and doping procedures on these properties
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mesoporous Materials and Catalysis · Layered Double Hydroxides Synthesis and Applications · Clay minerals and soil interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Kaolinite–titanium oxide nanocomposites prepared via sol–gel as heterogeneous photocatalysts for dyes degradation10.1016/j.cattod.2014.09.019 ↗
2. Pyridine and ammonia as probes for FTIR analysis of solid acid catalysts10.1039/ft9969201401 ↗
3. Adsorption of gases in multimolecular layers
4. Montmorillonite, vermiculite and saponite based porous clay heterostructures modified with transition metals as catalysts for the DeNOx process10.1016/j.apcatb.2008.11.001 ↗
5. Influence of the nature of titanium alkoxide and of the acid of hydrolysis in the preparation of titanium-pillared montmorillonites
6. Microporous 18Å Al-pillared vermiculites: preparation and characterization10.1016/S1387-1811(99)00274-7 ↗
7. Hydrolysis of titanium(IV) in aqueous (Na,H)Cl solution
8. Determination of integrated molar extinction coefficients for absorption bands of pyridine adsorbed on solid acid catalysts10.1006/jcat.1993.1145 ↗
9. Gil · 2010
10. Greenwood · 2012
11. Industrial applications
12. Comparison of the pure TiO2 and kaolinite/TiO2 composite as catalyst for CO2 photocatalytic reduction10.1016/j.cattod.2010.08.026 ↗
13. A new method for preparing microporous titanium pillared clays10.1016/0927-6513(93)80072-3 ↗
14. Studies on pore systems in catalysis10.1016/0021-9517(65)90307-6 ↗
15. Clay minerals as catalysts
16. TiO2 photocatalysis: design and applications10.1016/j.jphotochemrev.2012.06.001 ↗
17. Iron oxide pillared clay with large gallery height: synthesis and properties as a Fischer–Tropsch catalyst10.1016/0021-9517(91)90089-M ↗
18. Rouquerol · 1998
19. Understanding TiO2 photocatalysis: mechanisms and materials10.1021/cr5001892 ↗
20. Early stage of the hydrolysis of chromium (III) in aqueous solution. Characterization of a tetrameric species10.1021/ic00157a012 ↗
21. Comparative FT–IR study of the removal of octahedral cations and structural modifications during acid treatment of several silicates10.1016/S0584-8539(96)01771-0 ↗
22. Influence of the Ti precursor on the properties of Ti-pillared smectites10.1180/000985501547295 ↗
23. Pillared clays and clay minerals
24. Clays and clay minerals for pollution control