Synthesis and Characterization of Silica Nanoparticles and Study of Impurity Removal from Silica Nanoparticles by Acid Leaching
Issue:
Volume 8, Issue 3, September 2022
Pages:
31-36
Received:
19 July 2022
Accepted:
9 August 2022
Published:
24 August 2022
DOI:
10.11648/j.ajn.20220803.11
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Abstract: Water in oil reverse microemulsion synthesis and characterization of silica nanoparticles and removal of impurity from silica nanoparticles have been focused. A study has been established for the synthesis of non-agglomerated spherical silica nanoparticles. These nanoparticles were characterized using SEM-EDS, XRD, and TGA. After purification silica nanoparticles were characterized by UV and ICP-MS. SEM image reveals that spherical particle size of Silica nanoparticles are obtained in about 1 nanometer scale in a non-agglomerated form. The elemental composition of SiCl4•5H2O was determined using EDS. The major elements are 3.33 of O and 0.2 of Si (% by weight). Sharp XRD pattern confirms crystalline structure of Silica nanoparticles. There is presence of other phase’s peaks due to impurities into Silica nanoparticles. TGA explain that weight loss has occurred around 100°C of silica nanoparticles indicates the removal of absorbed and residual water. The data reveals that a total mass loss of 29.23% and 48.63% at around 100°C for the SiO2 NPs. The impurities in chemically treated silica nanoparticles before and after purification were analyzed by UV-vis and ICP-MS method. It was found that chemical treatment is very pronounced by ICP-MS in the removal of certain impurities such as aluminum and Sodium but other impurity Fe is less affected. The effects of acids on the removal of impurity from Silica NPs have been studied using acid leaching: successive two mixtures composed of HCl; HCL: HNO3 with a volume composition of 1; (2:1) respectively. UV-visible light absorption measurements were applied for the evaluation of the nature and the concentration of the dissolved impurities.
Abstract: Water in oil reverse microemulsion synthesis and characterization of silica nanoparticles and removal of impurity from silica nanoparticles have been focused. A study has been established for the synthesis of non-agglomerated spherical silica nanoparticles. These nanoparticles were characterized using SEM-EDS, XRD, and TGA. After purification silic...
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A Theoretical Framework of Elastic, Thermo-Physical Properties of the Monolayer Stanene
Kamlesh Kumar,
Mohammad Imran Aziz,
Khan Ahmad Anas,
Rahul Kumar Mishra
Issue:
Volume 8, Issue 3, September 2022
Pages:
37-42
Received:
4 August 2022
Accepted:
24 August 2022
Published:
5 September 2022
DOI:
10.11648/j.ajn.20220803.12
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Abstract: In the 2D materials family, stanene has drawn a specific interest because of its remarkable exhibitions and properties. Stanene is one of the most active areas of nanomaterials research due to their potential for integration into next-generation electronic. Using many body interactions that lead to bond charge model, the elastic, thermo-physical, and Debye temperature variations of monolayer stanene were investigated. The elasticity is a fundamental property of crystalline materials and is of great importance in physical science, including materials science, solid state physics and chemistry, geological sciences. Elastic constants such as Young’s modulus, Poisson’s ratio, bulk modulus and shear modulus have also been calculated. With the help of Elastic constants, the values longitudinal and transverse sound velocities also have been computed. Various studies of single layer stanene have been carried out to investigate the phonon properties and Phonon Density of States, however, other thermo physical properties such as heat capacity and Grüneisen parameter have been neglected. In this research paper, a comprehensive study on heat capacity and Grüneisen parameter is performed by Python program and all the above mention properties are equally important for engineering applications. Elastic and Thermo-Physical properties were calculated is agreed very close with the result of other researchers.
Abstract: In the 2D materials family, stanene has drawn a specific interest because of its remarkable exhibitions and properties. Stanene is one of the most active areas of nanomaterials research due to their potential for integration into next-generation electronic. Using many body interactions that lead to bond charge model, the elastic, thermo-physical, a...
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