Synthesis of reactive silica from kaolinitic clay: Effect of process parameters
Source abstract
Abstract
Abstract Reactive silica was synthesised using precursors from heated kaolinitic clay at 600, 700 and 800 °C. Each precursor was dissolved in an aqueous acidic medium; the residue was treated with either sodium or potassium hydroxide solution. The solution was finally hydrolysed and polymerised using either HCl, H2SO4 or HNO3 in the presence of ethanol as a cosolvent. Products were characterised using XRD, FTIR, SEM and TEM. Results indicated amorphous nanosilica as the main phase with particle sizes of 30 ± 7 to 21 ± 3 nm for NaOH and 28 ± 7 to 16 ± 3 nm for KOH. The best process yield, 84.2%, given by the combination of 700 °C/KOH/H2SO4, and the highest specific surface area of 81.9 g .m−2, was obtained under the conditions of 700 °C/NaOH/HCl. The adsorption test of methylene blue displayed the high capacity of these products to remove organic matter, a 99.9% abatement rate, indicating their high effectiveness in depollution.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mesoporous Materials and Catalysis · Clay minerals and soil interactions · Zeolite Catalysis and Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (60)
Show source-provided references
1. Quercetin conjugated with silica nanoparticles inhibits tumor growth in MCF-7 breast cancer cell times10.1016/j.bbrc.2018.04.174 ↗
2. Synthesis of nanometer-sized silica by controlled hydrolysis in reverse micellar systems. Chapter (Book)
3. High-efficiency crystalline silicon solar cells: status and perspective10.1039/C5EE03380B ↗
4. Size and fiber density controlled synthesis of fibrous nanosilica spheres10.1038/srep24888 ↗
5. Bergna, H.E., 1994. In Colloid chemistry of silica. An overview in the colloid chemistry of silica. H.E. Bergna (Ed), Adv. Chem. 234, 1–50.10.1021/ba-1994-0234.ch001 ↗
6. Boissière · 2004 · 1 · 14
7. Hydrolysis and condensation of silicates: effects on structure
8. Brinker · 1988 · 99
9. Brondeau · 1997 · 11
10. Outstanding problems in the kaolinite-mullite reaction sequence investigated by 29Si and 27AI solid state NMR: High temperature transformation of metakaolinite10.1111/j.1151-2916.1985.tb15229.x ↗
11. Influence of metakaolinization temperature on the formation of zeolite 4a from kaolin10.1180/claymin.1996.031.2.11 ↗
12. Mesoporous silica and organosilica nanoparticles: physical chemistry, biosafety delivery strategies and biomedical applications10.1002/adhm.201700831 ↗
13. Crude kaolin dissolution in the absence and presence of sodium poly (acrylic acid), sodium hexametaphosphate, and sodium Silicate under different experimental conditions10.1346/CCMN.2016.064029 ↗
14. An experimental study of kaolinite dissolution and precipitation kinetics as a function of chemical affinity and solution composition at 150°C, 40bars, and pH 2,6.8 and 7.810.1016/S0016-7037(97)00352-9 ↗
15. Silica-based systems for oral delivery of drugs, macromolecules and cells10.1016/j.cis.2017.04.005 ↗
16. One-step synthesis of silica nanoparticles by thermolysis of rice husk ash using non-toxic chemicals ethanol and polyethylene glycol
17. Extraction of alumina from kaolin by a combination of pyro- and hydrometallurgical processes10.1016/j.clay.2019.03.008 ↗
18. Preparation of TiO2-SiO2 using rice husk ash as silica source and the kinetics study as photocatalyst in methyl violet decolorization10.9767/bcrec.10.1.7218.43-49 ↗
19. Physicochemical characteristics and photocatalytic performance of TiO2/SiO2 catalyst synthesized using biogenic silica from bamboo leaves10.1016/j.heliyon.2019.e02766 ↗
20. Florke · 2008
21. Preparation and characterization of highly pure silica from sedge as agricultural waste and its utilization in the synthesis of mesoporous silica MCM-4110.1016/j.jtice.2013.01.019 ↗
22. Pharmaceutical nanotechnology: Mesoporous silica material TUD-1 as a drug delivery system10.1016/j.ijpharm.2006.09.019 ↗
23. Her · 1979 · 355
24. Preparation of Ag/SiO2 nanosize composites by a reverse micelle and sol-gel technique
25. Iler · 1979
26. Synthesis of silica nanoparticles by modified sol–gel process: the effect of mixing modes of the reactants and drying techniques10.1007/s10971-009-1958-6 ↗
27. Chemical modification of silica by immobilization of functional groups for extractive concentration of metal ions10.1016/j.talanta.2003.10.028 ↗
28. Jostein · 2015
29. Bio-templated silica composites for next generation biomedical applications10.1016/j.cis.2017.04.011 ↗
30. Adsorption d’un colorant basique, Bleu de Méthylène, en solution aqueuse, sur un bioadsorbant issu de déchets agricoles de Cucumeropsis mannii Naudin10.4314/ijbcs.v12i1.43 ↗
31. Kramer · 2014 · 5 · 28
32. Hydrophobic sol-gel coatings based on polydimethylsiloxane for self-cleaning applications10.1016/j.matdes.2015.07.174 ↗
33. Synthesis and surface characteristics of nanosilica produced from alkali-extracted rice husk ash10.1016/j.mseb.2011.01.007 ↗
34. Effect of particle-size distribution and specific surface area of different binder systems on packing density and flow characteristics of cement paste10.1016/j.cemconcomp.2017.01.005 ↗
35. Characterization by thermal analysis of natural kieselguhr and sand for industrial application10.1016/j.egypro.2015.07.773 ↗
36. Extraction and characterization of Amorphous Silica from Corn Cob Ash by Sol-Gel Method
37. Development of silica nanoparticle from corn cob ash10.4236/anp.2016.52015 ↗
38. Preparation and characterization of silica and clay-silica core-shell nanoparticles using sol-gel method10.4236/anp.2013.22025 ↗
39. Synthesis and characterization of silica nano-particles by acid leaching technique
40. Petrucci · 2007
41. Optimization of synthesis and characterization of nanosilica produced from rice husk (a common waste material)
42. Synthesis of silica nanoparticles by sol-gel: size-dependent properties, surface modification, and applications in silica-polymer nanocomposites—a review10.1155/2012/132424 ↗
43. Sol-gel process and its application in nanotechnology
44. Adsorption of Zn (II) ions by chitosan coated diatomaceous cell10.1016/j.ijbiomac.2017.08.053 ↗
45. An alternative and simple method for the preparation of bare silica nanoparticles despised residue in the brazilian industry
46. Synthesis and characterization of silica gel from siliceous sands of southern Tunisia Arabian
47. Recycling of glass in synthesis of MCM-48 mesoporous silica as catalyst support for Ni2O3 photocatalyst for Congo red dye removal10.1007/s10098-017-1447-5 ↗
48. Controlled growth of monodisperse silica spheres in the micron size range10.1016/0021-9797(68)90272-5 ↗
49. Structure and properties of defects in amorphous silica: new insights from embedded cluster calculations10.1088/0953-8984/17/21/007 ↗
50. Geoecoprotective technology of transport construction using silica sol absorption method10.1016/j.proeng.2017.05.073 ↗
51. Tuo · Langmuir · 1999 · 15 · 432810.1021/la970801o ↗
52. In situ growth of mesoporous silica with drugs on titanium surface and its biomedical applications10.1021/acsami.7b05163 ↗
53. Dissolution kinetics of kaolinite in acidic aqueous solution at 25°C10.1016/0016-7037(92)90382-S ↗
54. Burning temperature dependence of rice husk ashes in structure and property
55. Amorphous TiO2 layer on silicon monoxide nanoparticles as stable and scalable core-shell anode materials for high performance lithium ion batteries
56. A green and facile synthesis of ordered mesoporous nanosilica using coal fly ash10.1021/acssuschemeng.6b00793 ↗
57. Revisiting the Stöber method: inhomogeneity in silica shells10.1021/ja203316q ↗
58. Facile and economic synthesis of silica nanoparticles
59. Comparative study of effect of raw and densified silica fume in the paste, mortar and concrete10.1016/j.conbuildmat.2015.12.045 ↗
60. Synthesis and characterization of silica nanoparticle from clay10.1016/j.jascer.2015.12.001 ↗