Photocatalytic effect of Ag and Ag/Pt doped silicate non crystalline material on methyl violet — Experimental and theoretical studies

Chandraboss, V. L.; Senthilvelan, S.; Natanapatham, L.; Murugavelu, M.; Loganathan, B.; Karthikeyan, B.

doi:10.1016/j.jnoncrysol.2013.02.027

Cited by 21 publications

(16 citation statements)

References 34 publications

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“…When Phe-Phe NTs are entrapped inside the silicate matrix it is giving a broad absorbance that means the three peaks are merges. The pore size of the silica model has been calculated and reported in our earlier work [25]. The time dependent Density functional theory (TDDFT) further showed that Phe-Phe NTs has also having H bonding interaction with the silicate which may also results the broadening.…”

Section: Uv-visible Spectral Studiesmentioning

confidence: 85%

Entrap and release of Phe–Phe nanotubes in sol–gel derived silicate matrix: study through nanosilver interaction

Karthikeyan

Giri

Hruby

2014

J Sol-Gel Sci Technol

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After the discovery of the ability of dipeptide self-assembly, numerous research activities have been reported on Phe-Phe dipeptide based nano-materials. However, entrapping peptide nanotubes in a silicate matrix has not been carefully studied. This paper reports on selfassembled Phe-Phe nanotubes entrapped in a silicate matrix derived by a simple, and modified acid mediated sol-gel approach. Here, interaction of silver nanoparticles with regained nanotubes from the silicate matrix is reported. Mass spectrometry data showed the self-assembly of peptide monomers. Scanning electron microscopy and transmission electron microscopy studies have been used to examine the shapes and sizes of the nano-structures, and the results provide a promising method for trapping peptide based nanotubes. UV-Visible spectra suggest that there are some effects of silicate environment around Phe-Phe NTs on its absorbance. Density functional calculations showed the probable type of interaction between peptide and Ag atoms. This study can be useful for future applications, which are based on immobilization strategy for drug carrying and sensing.

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Section: Uv-visible Spectral Studiesmentioning

confidence: 85%

Entrap and release of Phe–Phe nanotubes in sol–gel derived silicate matrix: study through nanosilver interaction

Karthikeyan

Giri

Hruby

2014

J Sol-Gel Sci Technol

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“…The DFT calculation was implemented using the Gaussian basis set at the Becke 3-parameter hybrid functional (B3LYP)/LanL2DZ level of theory in the Gaussian 03W software package. 19 The B3LYP functional yielded reasonable results for small clusters in earlier studies and has been reliable for predicting energy gap values for a variety of metal oxides. 1 To obtain density of state (DOS) curves, the output was analyzed using the GaussSum programme.…”

Section: Computational Detailsmentioning

confidence: 65%

“…3 Thus, pore-size tuning is one of the most significant factors that enable the generic sol-gel technology to achieve the entrapment of many types of biomolecules of diverse sizes for a wide range of applications. [19][20][21][22][23] Silica in healthcare are found as porous glass, which can be designed to encapsulate a specific drug, which can then be released in situ by the degradation of the silica matrix, therefore maximizing therapeutic effects with the reduction of toxicological side effects. [19][20][21][22][23] Silica in healthcare are found as porous glass, which can be designed to encapsulate a specific drug, which can then be released in situ by the degradation of the silica matrix, therefore maximizing therapeutic effects with the reduction of toxicological side effects.…”

Section: Introductionmentioning

confidence: 99%

Experimental and first-principles investigation of the adsorption and entrapping of guanine with SiO₂clusters of sol–gel silicate material for understanding DNA photodamage

Chandraboss

Karthikeyan

Senthilvelan

2015

Phys. Chem. Chem. Phys.

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We report a first principles density functional theoretical (DFT) investigation of guanine (G) adsorption onto SiO2 clusters, viz., Si2O4, Si3O6, Si4O8 and Si5O10 in terms of geometry, binding energy (EB), binding site, energy gap (Eg), and electronic and spectral properties. Guanine entrapped within a Si9O18 cluster was also studied in terms of geometry, energy gap (Eg), electronic and spectral properties. We observed that the most stable forms of the cluster were Si5O10 and Si9O18. Guanine adsorbed onto SiO2 (G-SiO2) and guanine entrapped within SiO2 (GE-SiO2) were analyzed by the B3LYP/LanL2DZ method. The HOMO-LUMO energies illustrate that charge transfer from ligand to metal (L → M) occurs in G-SiO2 clusters as guanine to SiO2. The composite of guanine with nanostructured silica material was prepared by simple precipitation and chemical sol-gel processes. The prepared G-SiO2 and GE-SiO2 composites were characterized by FT-IR and FE-SEM with EDX analysis. The resulting experimental evidence is included for better understanding the guanine adsorption and entrapment. The adsorption and entrapping of G-SiO2 and GE-SiO2 was also confirmed by UV-vis spectroscopy. Experimental results are compared with the DFT results. Furthermore, the sol-gel silicate material used to protect the DNA base (guanine) from UVA-irradiation has been highlighted.

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“…Metal-silica core-shell particles, comprising the nanostructured metal core and siliceous shell, pulled in a great deal of consideration in the 26 current years because of their individual properties notable for some applications varying from catalysis, detecting and prescription [18,19]. Recently, metal particle doped sol-gel silicate lattice has turned into a stack of enthusiasm for photocatalysis and to upgrade the photocatalytic process UV-light illumination was followed [20,21]. Nowadays, the sol-gel is the most regularly utilized procedure for the amalgamation of silica nanostructures [22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of UV Active Photocatalyst Cd@SiO2 and its Photovoltaic Performance

Chandraboss¹,

Kamalakkannan²,

Senthilvelan³

2017

DJ JECF

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We give an account of a sort of Nano composite consisting of Cadmium (Cd) core and a Silica (SiO 2 ) shell. We developed and optimized these particles for photocatalytic and photovoltaic applications. The particle morphology was investigated by electron microscopy. The Cd-doped SiO 2 nanoparticles (Cd@SiO 2 )NPs had a narrow dissemination with breadths in the size scope of 60nm through TEM perception. The crystalline size is estimated by the Scherrer equation and TEM assessments. N 2 adsorption and desorption isotherms gave additional proof that the Cd particles were effectively fused into silicapore channels. Photocatalytic performance of Cd@SiO 2 NPs was investigated using Malachite Green (MG) as a model pollutant under UV light.

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Photocatalytic effect of Ag and Ag/Pt doped silicate non crystalline material on methyl violet — Experimental and theoretical studies

Cited by 21 publications

References 34 publications

Entrap and release of Phe–Phe nanotubes in sol–gel derived silicate matrix: study through nanosilver interaction

Entrap and release of Phe–Phe nanotubes in sol–gel derived silicate matrix: study through nanosilver interaction

Experimental and first-principles investigation of the adsorption and entrapping of guanine with SiO₂clusters of sol–gel silicate material for understanding DNA photodamage

Synthesis and Characterization of UV Active Photocatalyst Cd@SiO2 and its Photovoltaic Performance

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Photocatalytic effect of Ag and Ag/Pt doped silicate non crystalline material on methyl violet — Experimental and theoretical studies

Cited by 21 publications

References 34 publications

Entrap and release of Phe–Phe nanotubes in sol–gel derived silicate matrix: study through nanosilver interaction

Entrap and release of Phe–Phe nanotubes in sol–gel derived silicate matrix: study through nanosilver interaction

Experimental and first-principles investigation of the adsorption and entrapping of guanine with SiO2clusters of sol–gel silicate material for understanding DNA photodamage

Synthesis and Characterization of UV Active Photocatalyst Cd@SiO2 and its Photovoltaic Performance

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Experimental and first-principles investigation of the adsorption and entrapping of guanine with SiO₂clusters of sol–gel silicate material for understanding DNA photodamage