The activity of PAni-Chitosan composite film decorated with Pt nanoparticles for electrocatalytic hydrogen generation

Kayan, Didem Balun; Koçak, Derya; Ilhan, Merve

doi:10.1016/j.ijhydene.2016.05.024

Cited by 27 publications

(17 citation statements)

References 41 publications

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“…The peak obtained at 1477 cm −1 in the spectrum of PANI‐CS‐NC corresponds to CN quinoid structure of a benzene ring and is specific for PANI. Kayan et al . also reported similar peaks in their study based on PANI‐CS‐Pt NC.…”

Section: Resultssupporting

confidence: 72%

Elucidating the binding efficacy of β‐galactosidase on polyaniline–chitosan nanocomposite and polyaniline–chitosan–silver nanocomposite: activity and molecular docking insights

Khan

Husain

Ahmad

2018

J of Chemical Tech & Biotech

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BACKGROUND: Aspergillus oryzae -galactosidase ( -gal; EC 3.2.1.23) was physically adsorbed on polyaniline-chitosan nanocomposite (PANI-CS-NC) and polyaniline-chitosan-silver nanocomposite (PANI-CS-Ag-NC). Stability and kinetic studies were assessed, along with reusability and molecular docking interactions.RESULTS: According to transmission electron microscopy images, the sizes of the respective NCs were found to be in the range of 23-39 and 6-18 nm. The (effectiveness factor) values for PANI-CS-NC-and PANI-CS-Ag-NC-bound -gal were calculated to be 0.89 and 1.23, respectively, suggesting an enhancement in the activity of the enzyme in the presence of silver ions. Significant broadening was observed in pH and temperature profiles. Kinetic properties of PANI-CS-NC-and PANI-CS-Ag-NC-bound -gal showed lower K m , and two-and fourfold higher V max , respectively, compared to free enzyme. PANI-CS-Ag-NC-bound -gal was able to retain 94% of its initial activity after 10 repeated uses. Circular dichroism analysis revealed conformational changes in the secondary structure of protein upon immobilization. The genotoxic assessment revealed non-toxic behaviour of both free and enzyme-bound NC. The rate of lactose hydrolysis at 50 ∘ C exhibited by PANI-CS-Ag-NC bound -gal was 7% higher than that for the native enzyme. In-silico analysis showed efficient binding of -gal on PANI-CS-NCs due to interaction with residues that were exclusive of the active site of the enzyme. CONCLUSION: PANI-CS-Ag-NC-bound -gal preparation proved to be a robust nano-biocatalyst due to remarkable enhancement in catalytic activity along with excellent stability and reusability characteristics, which could be further utilized for efficient construction of nano-biosensors for producing lactose-free dairy products to feed lactose-intolerant patients. Lactose hydrolysis in batch processEnzymatic hydrolysis of lactose is a highly selective procedure which maintains the characteristics of a raw material in the J Chem Technol Biotechnol 2019; 94: 837-849

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Section: Resultssupporting

confidence: 72%

Elucidating the binding efficacy of β‐galactosidase on polyaniline–chitosan nanocomposite and polyaniline–chitosan–silver nanocomposite: activity and molecular docking insights

Khan

Husain

Ahmad

2018

J of Chemical Tech & Biotech

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“…Table 1. Chitosan-based product applications in the field of S&T [1][2][3][4][5][6][7][8][9][10][11][13][14][15][16][17][18][19][20][21].…”

Section: Discussionmentioning

confidence: 99%

“…Chitosan-formatted quantum dots are quick to generate safe/effectual delivery, silence unwanted gene expression/defects in curing diseases and can deliver genetic plasmids, DNA, si-RNA and oligonucleotides [13][14][15][16][17][18][19][20]. Nanometal-homogenized chitosan quantum dots offer controlled catalytic activity for multiple site selective gaseous adsorption/desorption [20,21]. Platinum-entrapped polyacrylonitrile/chitosan quantum dots are deposited onto pencil graphite electrodes to be used in synergic water electrolysis and are excellent for facilitated hydrogen evolution reactions and skilful hydrogen production [21].…”

Section: Chitosan-based Quantum Dotmentioning

confidence: 99%

“…Nanometal-homogenized chitosan quantum dots offer controlled catalytic activity for multiple site selective gaseous adsorption/desorption [20,21]. Platinum-entrapped polyacrylonitrile/chitosan quantum dots are deposited onto pencil graphite electrodes to be used in synergic water electrolysis and are excellent for facilitated hydrogen evolution reactions and skilful hydrogen production [21]. Chitosan-stabilized hyperbranched ligand quantum dots are multiresponsive drug delivery agents, luminous bioimaging sensors and semiconductors.…”

Section: Chitosan-based Quantum Dotmentioning

confidence: 99%

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Introductory Chapter: Multitask Portfolio of Chitin/Chitosan: Biomatrix to Quantum Dot

Dongre¹

2018

Chitin-Chitosan - Myriad Functionalities in Science and Technology

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“…CS-PPY/MMT films were prepared using different ratios of CS, PPY and MMT as shown in table no.1. These were coded as CS-PPY-1, CS-PPY/MMT-2, CS-PPY/MMT-3, CS-PPY/MMT-4 representing different wt % of MMT content (1%, 3%, 5%) respectively [8,9]. The formulation codes for different films are shown in table no.…”

Section: Preparation Of Cs-ppy/mmt Blends and Their Nanocompositesmentioning

confidence: 99%

Formulation and Evaluation of Chitosan-Polypyrrole Nanocomposites for Controlled Release of Anticancer Drug Doxorubicin

Behera¹,

Mishra²

2019

Int J App Pharm

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Objective:The purpose of the present study was a characterization of chitosan (CS)-polypyrrole (PPY) nanocomposites for controlled release of anticancer drug doxorubicin (DOX). Methods:Chitosan crosslink with PPY with montmorillonite (MMT) called as (CS-PPY/MMT) were formulated using the solvent casting method. The prepared nanocomposites were characterized by X-Ray Diffraction Analysis (XRD), tensile strength, scanning electronic microscope (SEM). Results:The XRD result confirmed that the CS-PPY/MMT possessed crystal structure. The nanocomposites CS-PPY/MMT-4 were showed a homogenous morphology. The Water uptake and swelling ratio of the CS-PPY and CS-PPY/MMT were found to decrease with increase in the concentration of clay. Mechanical properties of the CS-PPY and CS-PPY/MMT were assessed in terms of tensile strength and extensibility using texture analyzer. Increase in tensile strength and reduction in extensibility was reported with an increase in the nanoclay content. In vitro drug release study on CS-PPY and CS-PPY/MMT indicated pronounced sustained release of doxorubicin by the incorporation of clay particles in CS-PPY/MMT. It was observed that during the first 60 min of the dissolution study, the CS-PPY/MMT-4 film showed just 79.32±0.56% drug release as while the CS-PPY-1, CS-PPY/MMT-2 and CS-PPY/MMT-3 films showed a release of 53.79±1.23%, 63.51±1.24% and 68.15±2.38% respectively.Conclusion: CS-PPY/MMT nanocomposite films exhibited improved mechanical and sustained drug release properties than CS-PPY. The combination of biodegradable polymeric chains and clay reinforcement can be applied to achieve the desired combination of properties of materials used as a biosensor for diverse biomedical applications.

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The activity of PAni-Chitosan composite film decorated with Pt nanoparticles for electrocatalytic hydrogen generation

Cited by 27 publications

References 41 publications

Elucidating the binding efficacy of β‐galactosidase on polyaniline–chitosan nanocomposite and polyaniline–chitosan–silver nanocomposite: activity and molecular docking insights

Elucidating the binding efficacy of β‐galactosidase on polyaniline–chitosan nanocomposite and polyaniline–chitosan–silver nanocomposite: activity and molecular docking insights

Introductory Chapter: Multitask Portfolio of Chitin/Chitosan: Biomatrix to Quantum Dot

Formulation and Evaluation of Chitosan-Polypyrrole Nanocomposites for Controlled Release of Anticancer Drug Doxorubicin

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