Phyllantus Emblica Mediated Silica Nanomaterials: Biosynthesis, Structural and Stability Analysis

2021 ◽  
Author(s):  
M Sankareswaran ◽  
M Vanitha ◽  
P. Rajiv ◽  
A. Anbukumaran
Keyword(s):  
Silica Nanoparticles ◽  
Research Work ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Weight Percentage ◽  
Ir Studies ◽  
Silica Nanomaterials ◽  
Crystalline Nature ◽  
Size Of Particles ◽  
Average Size

Abstract The current investigation reports on a green route, simple and eco-friendly method for synthesis of silica nanoparticles from Phyllantus emblica. Appropriate characterization techniques were employed to assess the crystalline nature, microstructure, size, purity, elemental composition and stability of as-biosynthesized silica nanoparticles. The XRD analysis showed a wide-ranging peak at 22∘ of 2θ value and proved that the nanoparticles were crystalline nature with 32 nm average size of particles. FT-IR studies confirmed the occurrence of metal oxide group and presence of phyto-molecules namely hydroxyl, amide, and carboxyl functional groups, which were responsible for formation and stabilization of silica nanomaterials. TGA and Zeta potential analysis determined that silica nanoparticles are highly thermostable. EDX analysis revealed the purity of nanomaterials and spectra confirmed that formation of silica nanomaterials (72.97 weight percentage of SiO2 content) with low impurities. SEM analysis shows that the particles are spherical in shape with low agglomeration. This research work concluded that the P. emblica was an excellent and reliable green resource for production of highly stable and potential silica nanoparticles.

Study on Nano-TiO2 Film Prepared by Hydrothermal Method in Toluene-Hydrochloric Acid-Water System

2012 ◽  
Vol 610-613 ◽  
pp. 3247-3251 ◽  
Author(s):  
Xian Guang Zeng ◽  
Jia Zhuang ◽  
Min Gong ◽  
Xing Wen Zheng ◽  
Ming Tian Li
Keyword(s):  
Methylene Blue ◽  
Hydrochloric Acid ◽  
Hydrothermal Method ◽  
Tio2 Film ◽  
Water System ◽  
Photocatalytic Property ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Tetrabutyl Titanate ◽  
Average Size

A new hydrothermal method was introduced to prepare TiO2 films. The films were prepared by using tetrabutyl titanate as precursor, toluene as solvent and hydrochloric acid as the inhibitor via a facile hydrothermal method. XRD, SEM, AFM, and TG-DSC were used to characterize phase structure and morphology of TiO2 thin films. XRD analysis showed that crystal phase of as- prepared films were anatase entirely,and its average size was 9 nm. AFM and SEM analysis indicated that films had nanocrystallines,and it was homogenous,dense and crack- free. Photocatalytic properties of TiO2 film were estimated by degradation of methylene blue . The result shows that the degradation rate of 40mL methylene blue solution with initial concentration 10 mg/L reaches to 52.8 % after irradiated for 120 min under 35W ultraviolet lamp ,and as-prepared TiO2 film has better photocatalytic property.

scholarly journals Effect of Redox Additive Electrolyte on the Electrochemical Performance of MnO2 Nanorods for Supercapacitor Application

2019 ◽  
Vol 9 (2S2) ◽  
pp. 286-290
Keyword(s):  
Optical Properties ◽  
Electrochemical Performance ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Elemental Mapping ◽  
Supercapacitor Application ◽  
Working Electrode ◽  
Crystalline Nature ◽  
Prepared Nanorods ◽  
Maximum Specific Capacitance

Pure MnO2 nanorods were synthesized by hydrothermal method and characterized by different techniques to analyze their crystalline nature, surface morphology, functional groups, and optical properties. XRD analysis confirms that the prepared nanorods possess a tetragonal crystalline structure. The occurrence of nanorods was confirmed by SEM analysis and its elemental composition was studied by elemental mapping. MnO2 nanorods modified working electrode was fabricated by the deposition of prepared nanorods on nickel foil. Electrochemical performance of the MnO2 nanorods modified working electrode was studied using redox additive based electrolyte containing 0.1M K4 [Fe(CN)6 ] in 1M KOH solution. The maximum specific capacitance of the prepared nanorods in 1M KOH electrolyte was 89 Fg-1 and it is greatly enhanced by the addition of 0.1M K4 [Fe(CN)6 ] redox additives (634 Fg-1 ).

scholarly journals “FORMULATION AND EVALUATION OF TRANSDERMAL PATCHES OF PREDNISOLONE”

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Chirayu. C ◽  
Nagaraja T.S ◽  
Vitthal K Vijapure
Keyword(s):  
Drug Release ◽  
Xanthan Gum ◽  
Guar Gum ◽  
Research Work ◽  
In Vitro Study ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Drug Content ◽  
Free Films

The purpose of this research work was to develop and evaluate transdermal patch of Prednisolone, using Xanthan gum, Guar gum and Polyacrylamide in different ratios prepared by the Glass Substrate Technique. The physicochemical compatibility of the polymers and the drug was evaluated by FTIR. The results suggested that no physicochemical incompatibility between the polymer and the drug. Drug free films were formulated and evaluated characteristics like flexibility and smoothness. Further drug loaded films were formulated and evaluated for thickness, weight uniformity, drug content, folding endurance and drug release. The XRD analysis confirmed the amorphous dispersion of the drug in the formulation. SEM analysis showed surface morphology of prepared formulations. Drug diffusion through cellophane membrane was carried out using Franz diffusion cell by in-vitro study. The film prepared with formulation PDS 9 showed maximum diffusion release at the end of 24 hours. It is shown that drug release follows order and non Fikinian mechanism of release diffusion. The PDS 9 formulation was found to be stable with respect to drug content as well as physical changes at 40 ºC and 75 % RH. Keywords: Transdermal drug delivery, Prednisolone, Xanthan gum, Guar gum, Polyacrylamide.

Preparation of Waterborne Polyurethane by Bio-Based Polyol and Study of Nanocomposites with Nanocellulose Particles

2020 ◽  
Vol 20 (8) ◽  
pp. 4873-4877
Author(s):  
Soonmo Choi ◽  
Eunjoo Shin
Keyword(s):  
Waterborne Polyurethane ◽  
Xrd Analysis ◽  
Decomposition Temperature ◽  
Sem Analysis ◽  
Regenerated Cellulose ◽  
Initial Modulus ◽  
A Chain ◽  
Average Size ◽  
20 Nm ◽  
Low Crystallinity

In this study, we environment-friendly developed bio-based waterborne polyurethane (BWPU) through the use of both harmless water to human instead of organic solvent and natural castor oil-based polyols. Also, high crystallinity cellulose nanocrystals (CNCs) and regenerated cellulose nanoparticles (RCNs) with low crystallinity as reinforcing agents were prepared through H2SO4 and NaOH/urea methods, respectively. In SEM analysis, we defined that the CNC rod-like particles have a length of 100~200 nm and a width of several tens nm and that the average size of RCNs with round shape was 7~20 nm. It was shown that the crystallinity of CNCs was higher than RCNs’ via FTIR and XRD analysis. In addition, it was found that as the contents of CNCs and RCNs increased, so did the properties of strength, initial modulus, and strain. It could be established that all results mentioned were constituted by the hydrogen bonding between the -OH group of nanocellulose and the -NCO group of BWPU constitutes as well as the role of nanocellulose as a chain extender. Furthermore, the maximum decomposition temperature increased with raising the content of nanocellulose. This tendency was more favorable for CNCs with higher crystallinity than RCNs with low crystallinity.

The synthesis of Ba2+-doped multiferroic BiFeO3 nanoparticles using co-precipitation method in the presence of various surfactants and the investigation of structural and magnetic features

2017 ◽  
Vol 31 (15) ◽  
pp. 1750169 ◽  
Author(s):  
Reza Mardani
Keyword(s):  
Magnetic Properties ◽  
Bismuth Ferrite ◽  
Sodium Dodecyl ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Precipitation Method ◽  
Ferrite Structure ◽  
Vibration Sample Magnetometry ◽  
Size Of Particles ◽  
Co Precipitation

In this paper, doped bismuth ferrite nanoparticles with barium (Bi[Formula: see text]Ba[Formula: see text]FeO[Formula: see text], [Formula: see text] = 0.1, 0.15, 0.2) were synthesized by co-precipitation method in the presence of various surface activators. Structural properties, magnetic properties and the size of synthesized nanoparticles were investigated by different techniques such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), dynamic light scattering (DLS) and vibration sample magnetometry (VSM). The data obtained from XRD analysis showed a phase shift from rhombohedral to tetragonal structure by the enhancement of Barium amount in Bismuth ferrite structure. The results of TEM exhibit that the size of particles are 10 nm in average for the synthesized Bi[Formula: see text]Ba[Formula: see text]FeO[Formula: see text] and SEM analysis clarifies the uniform shape of particles which confirms the benign purity of the obtained material. VSM analysis shows that the best magnetic function will be observed when stoichiometric amount of Barium (Bi[Formula: see text]Ba[Formula: see text]FeO[Formula: see text] is [Formula: see text] = 0.15. The effect of diverse surface activators including Triton X-100, polyvinyl alcohol (PVA), sodium dodecyl sulfate (SDS), and cetyl trimethylammonium bromide (CTAB) was studied in the synthesis of Bi[Formula: see text]Ba[Formula: see text]FeO[Formula: see text] nanoparticles and CTAB presented the best effect on the magnetic properties of these nanoparticles.

Characterization of mechanochemically synthesized lead selenide

2009 ◽  
Vol 63 (5) ◽  
Author(s):  
Marcela Achimovičová ◽  
Nina Daneu ◽  
Aleksander Rečnik ◽  
Juraj Ďurišin ◽  
Baláž Peter ◽  
...  
Keyword(s):  
Mechanochemical Synthesis ◽  
Lead Selenide ◽  
Blue Shift ◽  
Xrd Analysis ◽  
High Energy ◽  
Sem Analysis ◽  
Area Measurement ◽  
Distribution Analysis ◽  
Average Size

AbstractMechanochemical synthesis of lead selenide PbSe nanocrystals was performed by high-energy milling of lead and selenium powders in a planetary ball mill. The structure properties of synthesized lead selenide were characterized by XRD analysis that confirmed crystalline nature of PbSe nanocrystals. Calculated average size of PbSe crystallites was 37 nm. The methods of particle size distribution analysis, specific surface area measurement, SEM and TEM were used for the characterization of surface and morphology of PbSe nanocrystals. SEM analysis revealed agglomerates of PbSe particles. However, HRTEM analysis confirmed perfect stoichiometric PbSe cubes with NaCl structure as well. UV-VIS-NIR spectrophotometry was used to confirm the blue shift of the small particles occurring in the powder product obtained by the mechanochemical synthesis.

Spark Plasma Sintering of Hybrid Nanocomposites of Hydroxyapatite Reinforced with CNTs and SS316L for Biomedical Applications

2020 ◽  
Vol 16 (4) ◽  
pp. 578-583
Author(s):  
Muhammad Asif Hussain ◽  
Adnan Maqbool ◽  
Abbas Saeed Hakeem ◽  
Fazal Ahmad Khalid ◽  
Muhammad Asif Rafiq ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Spark Plasma Sintering ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Hybrid Nanocomposites ◽  
Homogeneous Distribution ◽  
Sintering Behavior ◽  
Stainless Steel 316L ◽  
Plasma Sintering ◽  
Spark Plasma

Background: The development of new bioimplants with enhanced mechanical and biomedical properties have great impetus for researchers in the field of biomaterials. Metallic materials such as stainless steel 316L (SS316L), applied for bioimplants are compatible to the human osteoblast cells and bear good toughness. However, they suffer by corrosion and their elastic moduli are very high than the application where they need to be used. On the other hand, ceramics such as hydroxyapatite (HAP), is biocompatible as well as bioactive material and helps in bone grafting during the course of bone recovery, it has the inherent brittle nature and low fracture toughness. Therefore, to overcome these issues, a hybrid combination of HAP, SS316L and carbon nanotubes (CNTs) has been synthesized and characterized in the present investigation. Methods: CNTs were acid treated to functionalize their surface and cleaned prior their addition to the composites. The mixing of nano-hydroxyapatite (HAPn), SS316L and CNTs was carried out by nitrogen gas purging followed by the ball milling to insure the homogeneous mixing of the powders. In three compositions, monolithic HAPn, nanocomposites of CNTs reinforced HAPn, and hybrid nanocomposites of CNTs and SS316L reinforced HAPn has been fabricated by spark plasma sintering (SPS) technique. Results: SEM analysis of SPS samples showed enhanced sintering of HAP-CNT nanocomposites, which also showed significant sintering behavior when combined with SS316L. Good densification was achieved in the nanocomposites. No phase change was observed for HAP at relatively higher sintering temperatures (1100°C) of SPS and tricalcium phosphate phase was not detected by XRD analysis. This represents the characteristic advantage with enhanced sintering behavior by SPS technique. Fracture toughness was found to increase with the addition of CNTs and SS316L in HAPn, while hardness initially enhanced with the addition of nonreinforcement (CNTs) in HAPn and then decrease for HAPn-CNT-SS316L hybrid nanocomposites due to presence of SS316L. Conclusion: A homogeneous distribution of CNTs and SPS technique resulted in the improved mechanical properties for HAPn-CNT-SS316L hybrid nanocomposites than other composites and suggested their application as bioimplant materials.

Quality-by-Design Enabled Chitosan Nanoparticles for Antitubercular Therapy: Formulation, Statistical Optimization, and In vitro Characterization

2020 ◽  
Vol 15 ◽  
Author(s):  
Manasi M. Chogale ◽  
Sujay S. Gaikwad ◽  
Savita P. Kulkarni ◽  
Vandana B. Patravale
Keyword(s):  
Side Effects ◽  
Treatment Regimen ◽  
Research Work ◽  
Chitosan Nanoparticles ◽  
In Vitro Release ◽  
Antitubercular Therapy ◽  
Prolonged Treatment ◽  
High Dose ◽  
Average Size

Background: Tuberculosis (TB) continues to be among the leading causes for high mortality among developing countries. Though a seemingly effective treatment regimen against TB is in place, there has been no significant improvement in the therapeutic rates. This is primarily owing to the high drug doses, their associated sideeffects, and prolonged treatment regimen. Discontinuation of therapy due to the severe side effects of the drugs results in the progression of the infection to the more severe drug-resistant TB. Objectives: Reformulation of the current existing anti TB drugs into more efficient dosage forms could be an ideal way out. Nanoformulations have been known to mitigate the side effects of toxic, high-dose drugs. Hence, the current research work involves the formulation of Isoniazid (INH; a first-line anti TB molecule) loaded chitosan nanoparticles for pulmonary administration. Methods: INH loaded chitosan nanoparticles were prepared by ionic gelation method using an anionic crosslinker. Drugexcipient compatibility was evaluated using DSC and FT-IR. The formulation was optimized on the principles of Qualityby-Design using a full factorial design. Results: The obtained nanoparticles were spherical in shape having an average size of 620±10.97 nm and zeta potential +16.87±0.79 mV. Solid state characterization revealed partial encapsulation and amorphization of INH into the nanoparticulate system. In vitro release study confirmed an extended release of INH from the system. In vitro cell line based safety and efficacy studies revealed satisfactory results. Conclusion: The developed nanosystem is thus an efficient approach for antitubercular therapy.

scholarly journals Functional Attributes of Myco-Synthesized Silver Nanoparticles from Endophytic Fungi: A New Implication in Biomedical Applications

Biology ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 473
Author(s):  
Prabu Kumar Seetharaman ◽  
Rajkuberan Chandrasekaran ◽  
Rajiv Periakaruppan ◽  
Sathishkumar Gnanasekar ◽  
Sivaramakrishnan Sivaperumal ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Culture Filtrate ◽  
Morphological Changes ◽  
Xrd Analysis ◽  
Penicillium Oxalicum ◽  
Breast Cancer Cell Lines ◽  
Face Centered Cubic ◽  
Tem Analysis ◽  
X Ray ◽  
Average Size

To develop a benign nanomaterial from biogenic sources, we have attempted to formulate and fabricate silver nanoparticles synthesized from the culture filtrate of an endophytic fungus Penicillium oxalicum strain LA-1 (PoAgNPs). The synthesized PoAgNPs were exclusively characterized through UV–vis absorption spectroscopy, Fourier Transform Infra-Red spectroscopy (FT-IR), X-ray powder diffraction (XRD), and Transmission Electron Microscopy (TEM) with energy dispersive X-ray spectroscopy (EDX). The synthesized nanoparticles showed strong absorbance around 430 nm with surface plasmon resonance (SPR) and exhibited a face-centered cubic crystalline nature in XRD analysis. Proteins presented in the culture filtrate acted as reducing, capping, and stabilization agents to form PoAgNPs. TEM analysis revealed the generation of polydispersed spherical PoAgNPs with an average size of 52.26 nm. The PoAgNPs showed excellent antibacterial activity against bacterial pathogens. The PoAgNPs induced a dose-dependent cytotoxic activity against human adenocarcinoma breast cancer cell lines (MDA-MB-231), and apoptotic morphological changes were observed by dual staining. Additionally, PoAgNPs demonstrated better larvicidal activity against the larvae of Culex quinquefasciatus. Moreover, the hemolytic test indicated that the as-synthesized PoAgNPs are a safe and biocompatible nanomaterial with versatile bio-applications.

scholarly journals Preparation and characterization of corn starch/PVA/glycerol composite films incorporated with ε-polylysine as a novel antimicrobial packaging material

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 154-161 ◽  
Author(s):  
Gao Yurong ◽  
Li Dapeng
Keyword(s):  
Water Solubility ◽  
Corn Starch ◽  
Composite Films ◽  
Antimicrobial Properties ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Packaging Material ◽  
Hydroxyl Group ◽  
Electron Microscopic ◽  
Antimicrobial Packaging

AbstractCorn starch/polyvinyl alcohol (PVA)/glycerol composite films incorporated with ε-polylysine were prepared, and their properties were investigated. The Fourier-transform infrared (FTIR) spectroscopy indicated that the interactions happened between the amino group of ε-polylysine and hydroxyl group starch/PVA composite films. X-ray diffraction (XRD) analysis showed that the addition of ε-polylysine decreased the intensity of all crystal peaks. Thermogravimetric (TGA) analysis suggested that ε-polylysine improved the thermal stability of composite films. Scanning electron microscopic (SEM) analysis showed that the upper surface of composite films incorporated with ε-polylysine presented more compact and flat surface. The antimicrobial activity of the composite film progressively increased with the increasing of ε-polylysine concentration (P < 0.05). The tensile strength, elongation at break and water absorption significantly increased, whereas water solubility decreased with the increasing of ε-polylysine concentration (P < 0.05). Therefore, the corn starch/PVA/glycerol composite films incorporated with ε-polylysine had good mechanical, physical and antimicrobial properties and could have potential application as a novel antimicrobial packaging material.

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