Arginine-Mediated Self-Assembly of Porphyrin on Graphene: A Photocatalyst for Degradation of Dyes

La, Duong Duc; Hangarge, Rahul V.; Bhosale, Sidhanath V.; Ninh, Ha Duc; Jones, Lathe A.; Bhosale, Sheshanath V.

doi:10.3390/app7060643

Cited by 42 publications

(21 citation statements)

References 53 publications

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“…6b). It can be calculated from the plot that the degradation rate constant of the MB by kanamycin-Cu 3 (PO 4 ) 2 hybrid flowers is 15 × 10 −3 min −1 , which is comparative with other reported photocatalysts [36][37][38] .…”

Section: Resultsmentioning

confidence: 59%

Self-assembled kanamycin antibiotic-inorganic microflowers and their application as a photocatalyst for the removal of organic dyes

Jadhav

La²,

et al. 2020

Sci Rep

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Construction of hybrid three-dimensional (3D) hierarchical nanostructures via self-assembly of organic and inorganic compounds have recently attracted immense interest from scientists due to their unique properties and promise in a large range of applications. In this article, hybrid flower structures were successfully constructed by self-assembly an antibiotic, kanamycin, with Cu 2+. The flower-like morphology was observed by scanning electron microscopy, to be approximately 4 µm in diameter and about 10 nm in thickness. FTIR spectroscopy and X-ray diffraction confirmed the antibiotic-inorganic hybrid structure was uniform composition, and showed crystallinity due to ordered self-assembly. The hybrid flowers showed high photocatalytic activity towards degradation of methyl blue during 240 minutes under visible light irradiation. A possible mechanism of photocatalytic activity was also proposed, that exposes the inherent advantages in using antibiotic-inorganic hybrid flowers as photocatalysts, where self-assembly can be used to generate active, high surface area structures for photodegradation of pollutants.

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Section: Resultsmentioning

confidence: 59%

Self-assembled kanamycin antibiotic-inorganic microflowers and their application as a photocatalyst for the removal of organic dyes

Jadhav

La²,

et al. 2020

Sci Rep

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“…This self-assembled superstructure displayed an improved photocatalytic performance compared to the precursor PPIX (as shown in Figure 6). The proposal mechanism of the photocatalytic performance to degraded RhB has been presented and widely discussed earlier by our group [15,16,17,18,19]. Figure 7 illustrates the nanoflower assemblage of PPIX with l -/ d -arginine was established, it was irradiated with simulated visible light irradiation and electrons jumped from the valence band (VB) of the PPIX crystals to the conduction band (CB) as a result of the absorption of photo energy in the visible light range.…”

Section: Resultsmentioning

confidence: 99%

“…The nanoflower structure of porphyrin/TiO 2 displayed a significant improvement, with a rate of photocatalysis almost twice that of TiO 2 [14]. Porphyrin-based nanostructured materials have been utilized for photocatalysis with a range of various morphologies such as nanosheets, nanoplates, nanorods, nanoflowers and nanobelts [15,16,17,18,19,20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Arginine-Induced Self-Assembly of Protoporphyrin to Obtain Effective Photocatalysts in Aqueous Media Under Visible Light

et al. 2019

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The fabrication of controlled supramolecular nanostructures via self-assembly of protoporphyrin IX (PPIX) was studied with enantiomerically pure l-arginine and d-arginine, and we have shown that stoichiometry controlled the morphology formed. The nanostructure morphology was mainly influenced by the delicate balance of π-π stacking interactions between PPIX cores, as well as H-bonding between the deprotonated acidic head group of PPIX with the guanidine head group of arginine. PPIX self-assembled with l-/d-arginine to create rose-like nanoflower structures for four equivalents of arginine that were 5–10 μm in length and 1–4 μm diameter. We employed UV-vis, fluorescence spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), dynamic light scattering (DLS) and Fourier transform infrared spectroscopy (FT-IR) techniques to characterize the resulting self-assembled nanostructures. Furthermore, we investigated the catalytic activity of PPIX and arginine co-assembled materials. The fabricated PPIX–arginine nanostructure showed high enhancement of photocatalytic activity through degradation of rhodamine B (RhB) with a decrease in dye concentration of around 78–80% under simulated visible radiation.

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“…Graphene, a two-dimensional (2D) carbon material with substantial mechanical, electrical, and thermal properties, has been extensively used in a wide range of industrial applications in the fields of engineering, chemistry, and physics [4,[25][26][27][28][29][30]. Additionally, the 2D structures easily slide together, making graphene an effective additive for lowering the friction in mechanical parts and vehicle engines [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Scalable Fabrication of Modified Graphene Nanoplatelets as an Effective Additive for Engine Lubricant Oil

La¹,

Truong²,

Pham³

et al. 2020

Nanomaterials

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The use of nano-additives is widely recognized as a cheap and effective pathway to improve the performance of lubrication by minimizing the energy loss from friction and wear, especially in diesel engines. In this work, a simple and scalable protocol was proposed to fabricate a graphene additive to improve the engine lubricant oil. Graphene nanoplates (GNPs) were obtained by a one-step chemical exfoliation of natural graphite and were successfully modified with a surfactant and an organic compound to obtain a modified GNP additive, that can be facilely dispersed in lubricant oil. The GNPs and modified GNP additive were characterized using scanning electron microscopy, X-ray diffraction, atomic force microscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. The prepared GNPs had wrinkled and crumpled structures with a diameter of 10–30 µm and a thickness of less than 15 nm. After modification, the GNP surfaces were uniformly covered with the organic compound. The addition of the modified GNP additive to the engine lubricant oil significantly enhanced the friction and antiwear performance. The highest reduction of 35% was determined for the wear scar diameter with a GNP additive concentration of approximately 0.05%. The mechanism for lubrication enhancement by graphene additives was also briefly discussed.

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Arginine-Mediated Self-Assembly of Porphyrin on Graphene: A Photocatalyst for Degradation of Dyes

Cited by 42 publications

References 53 publications

Self-assembled kanamycin antibiotic-inorganic microflowers and their application as a photocatalyst for the removal of organic dyes

Self-assembled kanamycin antibiotic-inorganic microflowers and their application as a photocatalyst for the removal of organic dyes

Arginine-Induced Self-Assembly of Protoporphyrin to Obtain Effective Photocatalysts in Aqueous Media Under Visible Light

Scalable Fabrication of Modified Graphene Nanoplatelets as an Effective Additive for Engine Lubricant Oil

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