Insights into the physicochemical characteristics from vermiculite to silica nanosheets
Source abstract
Abstract
Abstract Mesoporous silica nanosheets (SiNSs) were prepared from acid-treated vermiculite (Verm). The influences of acid concentration and reaction time on the structural and textural properties of acid-treated samples were investigated. The physicochemical characteristics of SiNSs were studied by X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared (FTIR), N2 adsorption-desorption techniques, zeta potential, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and 29Si and 27Al nuclear magnetic resonance (NMR). XRF study indicated that acid-treatment leads to the removal of the aluminum and magnesium from the octahedral sheets along with other impurities. XRD, SEM and HRTEM measurements supported that treatment with moderate concentrated acid and reaction time favor the formation of translucent and monodispersed SiNSs, which have been reported rarely. Acid-activation with 2 M HCl for 12 h gave a maximum value of specific surface area (764 m2 g− 1) with zeta potential of − 38.9 mV. FTIR and NMR spectroscopic analyses demonstrated the formation of active groups (Si-OH groups) on the surface of SiNSs. The SiNSs thus obtained by acid-treatment can be used as promising catalyst supports, adsorbents, and morphology-controlling reagents of nanomaterials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Clay minerals and soil interactions · Iron oxide chemistry and applications · Zeolite Catalysis and Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. The removal of dyes from textile wastewater: a study of the physical characteristics and adsorption mechanisms of diatomaceous earth10.1016/j.jenvman.2003.09.005 ↗
2. Meslostructured silica supports for functional materials and molecular machines10.1002/adfm.200601217 ↗
3. Brigatti, M.F., Galan, E., Theng, B.K.G. 2006. Structures and mineralogy of clay minerals, in: Bergaya, F., Theng, B.K.G., Lagaly, G. (Eds.), Handbook of Clay Science, Developments in Clay Science, vol. 1. Elsevier, Amsterdam, chap. 2, pp. 43–44.
4. Acid-treated vermiculites as effective catalysts of high-temperature N2O decomposition10.1016/j.clay.2014.08.006 ↗
5. The Sol-gel route to advanced silica-based materials and recent applications10.1021/cr300399c ↗
6. Electrokinetic properties of vermiculite and expanded vermiculite: effects of pH, clay concentration and mono- and multivalent electrolytes10.1080/01496390802219109 ↗
7. Determination of adsorptive properties of expanded vermiculite for the removal of C. I. Basic red 9 from aqueous solution: kinetic, isotherm and thermodynamic studies, Appl10.1016/j.clay.2015.03.003 ↗
8. Nanocomposites prepared by threading polymer chains through zeolites, mesoporous silica, or silica nanotubes10.1021/cm960046k ↗
9. Synthesis of gold catalysts supported on mesoporous silica materials: recent developments10.3390/catal1010097 ↗
10. Selective adsorbents from ordered mesoporous silica10.1021/la0267084 ↗
11. Preparation of highly porous silica nanocomposites from clay mineral: a new approach using pillaring method combined with selective leaching10.1016/j.micromeso.2004.10.033 ↗
12. Komadel, P., Madejova, J., 2006. Acid activation of clay minerals, in: Bergaya, F., Theng, B.K.G., Lagaly, G. (Eds.), Handbook of Clay Science, Developments in Clay Science, vol. 1. Elsevier, Amsterdam, chap.7.1.10.1016/S1572-4352(05)01008-1 ↗
13. Ab initio calculations on aluminosilicate Q3 species: implications for atomic structures of mineral surfaces and dissolution mechanisms of feldspars10.2138/am-1996-7-801 ↗
14. Preparation of silica powder with high whiteness from palygorskite10.1016/j.clay.2010.08.019 ↗
15. Effect of grinding on the preparation of porous materials by acid-leached vermiculite10.1016/j.jpcs.2007.01.037 ↗
16. Preparation of porous silica from chlorite by selective acid leaching10.1016/j.clay.2005.04.001 ↗
17. Porous properties of mesoporous silicas from two silica sources (acid-leached kaolinite and Si-alkoxide)10.1007/s10934-008-9260-5 ↗
18. Vibrational spectroscopy of acid treated vermiculites10.1016/j.vibspec.2013.11.007 ↗
19. Acid-leached mixed vermiculites obtained by treatment with nitric acid10.1016/j.clay.2014.12.008 ↗
20. Reporting physisorption data for gas solid systems with special reference to the determination of surface-area and porosity (Recommendations 1984)10.1351/pac198557040603 ↗
21. Preparation of porous materials by chemical activation of the llano vermiculite10.1180/claymin.1991.026.1.06 ↗
22. Preparation of porous silica from vermiculite by selective leaching10.1016/S0169-1317(02)00158-8 ↗
23. Medical applications of organic-inorganic hybrid materials within the field of silica-based bioceramics10.1039/C0CS00025F ↗
24. Green synthesis of shape-defined anatase TiO2 nanocrystals wholly exposed with {001} and {100} facets10.1039/c2cc36005e ↗
25. TiO2 supported on silica nanolayers derived from vermiculite for efficient photocatalysis10.1016/j.cattod.2013.06.026 ↗
26. Preparation of porous material from talc by mechanochemical treatment and subsequent leaching10.1016/j.clay.2005.10.015 ↗
27. One-step synthesis of hydrothermally stable mesoporous aluminosilicates with strong acidity10.1016/j.jssc.2008.05.046 ↗
28. Acid-activated montmorillonites as heterogeneous catalysts for the esterification of lauric acid acid with methanol10.1016/j.clay.2013.04.009 ↗
29. Insights into the physicochemical aspects from natural halloysite to silica nanotubes10.1016/j.colsurfa.2012.08.003 ↗
30. Removal of methylene blue from aqueous solution with silica nano-sheets derived from vermiculite10.1016/j.jhazmat.2008.01.031 ↗