Correlation of acid sites with morphology of layered silicates
Source abstract
Abstract
Acid sites of clay minerals are active to catalyze numerous organic reactions. Previous studies had focused on the types and strength of these sites by correlating them with acid, pillaring or heat treatments, but the relation of acid sites with clay mineral morphology is not well understood. In this study, the synthesis of samples having similar chemical composition and structure, but different morphology characteristics was realized. The surface of samples was characterized by low-pressure argon adsorption at 77 K. The acid sites were probed by thermal desorption of 2-phenylethylamine. Three sites of different acid strength were identified. Whereas the assignment of these sites to basal and edge surfaces remains debatable, the method of thermal desorption of 2-phenylethylamine could clearly distinguish different sites related to homogenous and heterogeneous surfaces. • Samples with same chemistry and structure, but different morphology were produced. • TPD of 2-phenylethylamine allows probing acid sites of different strength. • Method could clearly distinguish homogenous and heterogeneous surfaces.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Zeolite Catalysis and Synthesis · Mesoporous Materials and Catalysis · Chemical Synthesis and Characterization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (58)
Show source-provided references
1. Chapter 10.2 Clay minerals as catalysts
2. A spectroscopy and catalysis study of the nature of active sites of MgO catalysts: Thermodynamic Brønsted basicity versus reactivity of basic sites10.1016/j.jcat.2005.09.004 ↗
3. Bardot · 1998
4. High resolution gas adsorption study on illites permuted with various cations. Assessment of surface energetic properties10.1080/01932699808913212 ↗
5. Sorption and molecular sieve properties of clays and their importance as catalysts
6. The physical basis of life10.1088/0370-1298/62/9/301 ↗
7. Preparation, characterization and catalytic application of phyllosilicate: a review10.1016/j.cattod.2018.12.030 ↗
8. On the acidity of saponite materials: a combined HRTEM, FTIR, and solid-state NMR study10.1021/la703308b ↗
9. Thermogravimetric and infrared study of the desorption of butylamine, cyclohexylamine and pyridine from Ni- and Co-exchanged montmorillonite10.1180/claymin.1991.026.4.04 ↗
10. Brindley · 1980
11. Adsorption of gases in multimolecular layers10.1021/ja01269a023 ↗
12. Solid acids, surface acidity and heterogeneous acid catalysis10.1016/bs.acat.2020.09.003 ↗
13. Experimental and modelization approach in the study of acid-site energy distribution by base desorption. Part I: Modified silica surfaces10.1021/jp047889g ↗
14. Chapter 4 Synthetic clay minerals and purification of natural clays
15. Industrial applications of acid-treated clays as catalysts10.1016/S1381-5148(96)00074-0 ↗
16. Lewis Acids: from conventional homogeneous to green homogeneous and heterogeneous catalysis10.1021/cr030680z ↗
17. Side-product inhibition of the catalyst in electrophilic aromatic substitutions and Friedel-Crafts reactions10.1007/BF00763928 ↗
18. Baseline studies of the Clay Minerals Society source clays: specific surface area by the Brunauer Emmett Teller (BET) method10.1346/CCMN.2006.0540108 ↗
19. Formation of iron-rich phyllosilicates in the FeO–SiO2 –H2O system during hydrothermal synthesis as a function of pH10.1180/clm.2024.8 ↗
20. Földvári · 2011 · 180
21. Dissociation and recombination of positive holes in minerals
22. Influence of Fe(II), Fe(III) and Al(III) isomorphic substitutions on acid-base properties of edge surfaces of Cis-vacant montmorillonite: insights from first-principles molecular dynamics simulations and surface complexation modeling
23. The use of nuclear magnetic resonance (NMR) for the determination of tetrahedral aluminium in montmorillonite10.1180/claymin.1984.019.4.12 ↗
24. Baseline studies of the clay minerals society source clays: thermal analysis10.1346/CCMN.2001.0490509 ↗
25. A mineral-based origin of Earth’s initial hydrogen peroxide and molecular oxygen10.1073/pnas.2221984120 ↗
26. Single crystal structure refinement of one- and two-layer hydrates of sodium fluorohectorite10.1039/c2ra20457f ↗
27. Reaction kinetics in differential thermal analysis10.1021/ac60131a045 ↗
28. Chemical reactions on clays10.1126/science.235.4795.1473 ↗
29. Catalysis of organic reactions by inorganic solids10.1351/pac199062102027 ↗
30. Molecular-level understanding of metal ion retention in clay-rich materials10.1038/s43017-022-00301-z ↗
31. McNaught, A.D. & Wilkinson, A. (eds.). (1997) IUPAC. Compendium of Chemical Terminology. In.: 2nd edition. Blackwell Scientific Publishions, Oxford.
32. Influence of the precursor and the temperature of synthesis on the structure of saponite10.1007/s42860-020-00099-1 ↗
33. Surface heterogeneity studied by a quasi-equilibrium gas adsorption procedure10.1021/la00093a025 ↗
34. Assessment of surface energetic heterogeneity of synthetic Na-saponites. The role of layer charge10.1180/0009855023710016 ↗
35. Assessment of surface energetic heterogeneity of synthetic Na-saponites. The role of layer charge10.1180/0009855023710016 ↗
36. The structural microscopic hydrophilicity of talc10.1021/la00022a061 ↗
37. Solid acidity of 2 : 1 type clay minerals activated by selective leaching10.1016/j.clay.2005.10.014 ↗
38. How do nucleotides adsorb onto clays?
39. Hydrated metal ions in aqueous solution: how regular are their structures?10.1351/PAC-CON-09-10-22 ↗
40. Aluminated derivatives of porous clay heterostructures (PCH) assembled from synthetic saponite clay: properties as supermicroporous to small mesoporous acid catalysts10.1021/cm011559g ↗
41. Study of the porous solids obtained by acid treatment of a high surface area saponite10.1023/A:1009657312123 ↗
42. Morphological properties of vermiculite particles in size-selected fractions obtained by sonication10.1016/j.clay.2013.03.013 ↗
43. Spatially resolved observation of crystal-face-dependent catalysis by single turnover counting10.1038/nature04502 ↗
44. Reflections on the material science of clay minerals10.1016/j.clay.2015.12.005 ↗
45. Formation of replicating saponite from a gel in the presence of oxalate: implications for the formation of clay minerals in carbonaceous chondrites and the origin of life10.1089/ast.2011.0635 ↗
46. Clay minerals as electron acceptors and/or electron donors in organic reactions10.1346/CCMN.1968.0160105 ↗
47. Theng · 2018 · 426
48. Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)10.1515/pac-2014-1117 ↗
49. Synthesis and acid-base properties of Mg-saponite10.1016/j.mencom.2017.07.031 ↗
50. Nanomorphology of montmorillonite particles: estimation of the clay edge sorption site density by low-pressure gas adsorption and AFM observations10.2138/am-2003-11-1243 ↗
51. Clay and clay-supported reagents in organic synthesis10.1016/S0040-4020(01)01216-9 ↗
52. Texture and surface energetic heterogeneity of solids from modeling of low pressure gas adsorption isotherms10.1021/la00043a018 ↗
53. An Improved Derivative Isotherm Summation Method To Study Surface Heterogeneity of Clay Minerals10.1021/la9510083 ↗
54. Catalytic activity of synthetic saponite clays: Effects of tetrahedral and octahedral composition10.1016/j.jcat.2005.02.004 ↗
55. Catalytic applications of zeolites in chemical industry10.1007/s11244-009-9226-0 ↗
56. Zeolite catalysts come into focus · Nat. Mater. · 2020 · 19 · 103710.1038/s41563-020-00819-x ↗
57. Crystal growth of smectite: a study based on the change in crystal chemistry and morphology of saponites with synthesis time10.1021/acsearthspacechem.9b00194 ↗
58. Modification, hybridization and applications of saponite: an overview10.1016/j.clay.2018.11.002 ↗