Preparation and Characterization Studies of Amorphophallus paeonifolius and Manihot esculenta as a Bioplastic using Glycerol and Agar-Agar as Plasticizer

2020 ◽  
Vol 36 (6) ◽  
pp. 1205-1211
Author(s):  
J. Morris Princey ◽  
A. Nandhini ◽  
E. Abinaya
Keyword(s):  
Manihot Esculenta ◽  
Fossil Fuel ◽  
Corn Starch ◽  
Fats And Oils ◽  
Sem Analysis ◽  
Saw Dust ◽  
Ft Ir ◽  
Characterization Studies ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

Bio-plastics are biodegradable materials which can be obtained from the renewable sources such as corn starch, straw, vegetable fats and oils, wood-chips, recycled food waste, saw dust etc. They can be used as an alternative to the commercial plastics in the market which contaminate our environment. Now-a-days bio-plastics are worldwide popular due to its concern towards the environment, limited fossil fuel resources and the climatic change. The purpose of this study is to assess the properties of the starch based bio-plastics prepared from Amorphophallus paeonifolius and Manihot esculenta using glycerol and agar-agar as the plasticizers. The synthesized bio-plastic was characterized with the help of UV-Visible spectrophotometer, FT-IR spectroscopy and SEM Analysis.

scholarly journals Incorporation of silver stearate nanoparticles in methacrylate polymeric monoliths for hemeprotein isolation

2020 ◽  
Vol 18 (1) ◽  
pp. 399-411
Author(s):  
Eman Alzahrani
Keyword(s):  
Noble Metals ◽  
Extraction Process ◽  
Sem Analysis ◽  
X Ray ◽  
Polymeric Scaffold ◽  
Extended Surface ◽  
Unique Method ◽  
Unique Approach ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

AbstractA unique method was used to synthesize extremely stable silver stearate nanoparticles (AgStNPs) incorporated in an organic-based monolith. The facile strategy was then used to selectively isolate hemeproteins, myoglobin (Myo) and hemoglobin (Hb). Ethyl alcohol, silver nitrate, and stearic acid were, respectively, utilized as reducing agents, silver precursors, and capping agents. The color changed to cloudy from transparent, indicating that AgStNPs had been formed. AgStNP nanostructures were then distinctly integrated into the natural polymeric scaffold. To characterize the AgStNP–methacrylate polymeric monolith and the silver nanoparticles, energy-dispersive X-ray (EDX), scanning electron microscopy (SEM), and Fourier-transform infrared (FT-IR) spectroscopy were used. The results of the SEM analysis indicated that the AgStNP–methacrylate polymeric monolith’s texture was so rough in comparison with that of the methacrylate polymeric monolith, indicating that the extraction process of the monolith materials would be more efficient because of the extended surface area of the absorbent. The comparison between the FT-IR spectra of AgStNPs, the bare organic monolith, and AgStNP–methacrylate polymeric monolith confirms that the AgStNPs were immobilized on the surface of the organic monolith. The EDX profile of the built materials indicated an advanced peak of the Ag sequence which represented an Ag atom of 3.27%. The results therefore established that the AgStNPs had been successfully integrated into the monolithic materials. Extraction efficiencies of 92% and 97% were used to, respectively, recover preconcentrated Myo and Hb. An uncomplicated method is a unique approach of both fabrication and utilization of the nanosorbent to selectively isolate hemeproteins. The process can further be implemented by using other noble metals.

Synthesis and characterization of Cr-ZSM-5 composite in fluoride medium and its performance in oxidation reaction of 2-mercaptobenzotiazole

2017 ◽  
Vol 29 (4) ◽  
pp. 483-490
Author(s):  
Benchikh Imen ◽  
Djafri Fatiha ◽  
Djafri Ayada ◽  
Tabti Affaf ◽  
Franck Launay
Keyword(s):  
Catalytic Performance ◽  
Uv Spectra ◽  
Charge Transfer Transition ◽  
Heterogeneous Oxidation ◽  
Content Type ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy ◽  
Fluoride Medium

Purpose The purpose of this paper is to synthesize Cr-ZSM-5 using hydrothermal synthesis in acidic fluoride medium and the investigation of its catalytic performance in heterogeneous oxidation of 2-mercaptobenzothiazole in the presence of H2O2. Design/methodology/approach The framework was characterized by chemical composition, FT-IR, UV-visible spectroscopy, N2 adsorption (BET), and diffraction x-ray (DRX). FT-IR spectroscopy shows the characteristic band of Si-O-Cr linkage around 960-990 cm−1 and bands around 688-690 and 627 cm−1, indicating the presence of extraframework chromium oxide. UV spectra show a shoulder around 244-257 and bands around 360-380 nm, assigning the tetrahedral coordinated environment in (O2−=Cr6+) − (Cr5+-O−1), charge transfer transition state (CT) of isolated Cr (VI) inside the structure of Cr-ZSM-5. Findings The catalytic degradation of 2-mercaptobenzothiazole by H2O2 heterogenous oxidation using catalyst Cr-ZSM-5 showed the formation of bis (benzothiazoyl) disulfide with 95 percent yield. Originality/value The application of this process in the environment (catalysis, adsorption, and degradation of organic compounds).

scholarly journals Congo Red and Nigrosine Dye Degradation using Dimethyl Dioxirane as an Oxidising Agent

2021 ◽  
Vol 37 (5) ◽  
pp. 1221-1228
Author(s):  
S. Vinotha ◽  
A.Leema Rose
Keyword(s):  
Congo Red ◽  
Room Temperature ◽  
Functional Group ◽  
Dye Degradation ◽  
Visible Spectroscopy ◽  
Before And After ◽  
Ft Ir ◽  
Combined Action ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

The advanced oxidation of Congo red (CR) and Nigrosine (NI) using the combined action of dimethyl dioxirane as an oxidising agent is described in this study. The effects of several parameters, such as the concentration of the oxidising agent, the initial dye concentration, and the pH, have been investigated. At room temperature, the oxidising agent dimethyl dioxirane was employed to test the degradation of CR and NI dyes. On the degradation efficiency of CR and NI, pH’s effects, oxidising agent, and initial dye concentration were examined. The absorbance of CR and NI dyes before and after degradation was measured using UV-visible spectroscopy. The functional group existing in the dyes before and after degradation was determined using FT-IR spectroscopy.

scholarly journals Synthesis and characterization of Metal-mercaptoacetate hybrids and its application towards ring opening polymerization of ε-caprolactone: A comparative study

2021 ◽  
Author(s):  
L. Kannammal ◽  
B. Meeenarathi ◽  
V. Parthasarathy ◽  
Ramasamy Anbarasan
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Linear Increase ◽  
Nmr Spectrum ◽  
Degradation Temperature ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

Abstract The Mn2+ and Mo6+ based Metal-mercaptoacetate (Metal-MA) hybrids were prepared by a simple acid-base titration method. The prepared Metal-MA hybrids were analysed by FT-IR spectroscopy, UV-visible spectroscopy, SEM, particle size analyser (PSA), XRD and EDX. The prepared Metal-MA hybrids were investigated to assess their catalytic activity for ring-opening polymerization (ROP) of ε-caprolactone (CL) in the absence of an initiator at 160 oC in N2 atmosphere by varying the catalyst concentration and temperature. The catalytic activity of the Metal-MA hybrid towards the ROP of CL was concluded by the FTIR-RI method. The % yield, degradation temperature (Td), melting temperature (Tm) and molecular weight (Mw) of poly(ε-caprolactone) (PCL) were also investigated. The structure of PCL was comprehended by analysing its NMR spectrum. The activation energy (Ea) for the ROP of CL was determined as 10,363 Kcal/mol. A linear increase in Mw of PCL with the increasing [M0/I0] ratio was also noticed.

A pyridinium modified β-cyclodextrin: an ionic supramolecular ligand for palladium acetate in C–C coupling reactions in water

2016 ◽  
Vol 18 (20) ◽  
pp. 5518-5528 ◽  
Author(s):  
Raihana Imran Khan ◽  
Kasi Pitchumani
Keyword(s):  
Mass Spectrometry ◽  
Light Scattering ◽  
Ir Spectroscopy ◽  
Water Soluble ◽  
Palladium Acetate ◽  
Coupling Reactions ◽  
Visible Spectroscopy ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

An ionic Pd(ii) complex stabilized by a water soluble pyridinium modified β-cyclodextrin was prepared and characterized by NMR, mass spectrometry, FT-IR spectroscopy, UV-visible spectroscopy and DLS (dynamic light scattering).

scholarly journals Effects of Treatment Temperature on Properties of Starch-based Adhesives

BioResources ◽  
2015 ◽  
Vol 10 (2) ◽  
pp. 3520-3530 ◽  
Author(s):  
Hongwei Yu ◽  
Yuan Cao ◽  
Qun Fang ◽  
Zhikun Liu
Keyword(s):  
Polyvinyl Alcohol ◽  
Bond Strength ◽  
Corn Starch ◽  
Treatment Temperature ◽  
Hydroxyl Groups ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Ft Ir ◽  
Acidic Conditions ◽  
Ft Ir Spectroscopy

Starch-based adhesives were developed by hydrolyzing starch with polyvinyl alcohol under alkaline and acidic conditions at various treatment temperatures. The chemical and physical structures of the corn starch and hydrolyzed starch were characterized with Fourier Transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and scanning electronic microscopy (SEM). Thermal degradation and bond strength were also evaluated. The results indicated that the bond strength of starch adhesives reached a maximum value at 40 °C. The FI-IR results showed that the amount of hydroxyl groups first increased and then decreased with increasing treatment temperature. When the treatment temperature was 55 °C the crystallinity of treated starch was the lowest and the thermal resistance also the weakest; it decreased by 10.1% and 13.6% respectively compared to untreated starch. Obvious erosion could be observed from the SEM images of treated starch. In addition, the interaction of polyvinyl alcohol (PVA) and starch also could be observed, and the results indicated that the compatibility between starch and PVA became better and better as the treated temperature was increased.

Preparation and characterization of cross-linked poly (vinyl alcohol)-graphene oxide nanocomposites as an interlayer for Schottky barrier diodes

2018 ◽  
Vol 32 (01) ◽  
pp. 1750276 ◽  
Author(s):  
Lida Badrinezhad ◽  
Çigdem Bilkan ◽  
Yashar Azizian-Kalandaragh ◽  
Ali Nematollahzadeh ◽  
İkram Orak ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ir Spectroscopy ◽  
Chemical Interaction ◽  
Low Frequency ◽  
Sem Analysis ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
Voltage Dependent ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Cross-linked polyvinyl alcohol (PVA) graphene oxide (GO) nanocomposites were prepared by simple solution-mixing route and characterized by Raman, UV–visible and fourier transform infrared (FT-IR) spectroscopy analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The XRD pattern and SEM analysis showed significant changes in the nanocomposite structures, and the FT-IR spectroscopy results confirmed the chemical interaction between the GO filler and the PVA matrix. After these morphological characterizations, PVA-GO-based diodes were fabricated and their electrical properties were characterized using current–voltage (I–V) and impedance-voltage-frequency (Z-V-f) measurements at room temperature. Semilogarithmic I–V characteristics of diode showed a good rectifier behavior. The values of C and G/[Formula: see text] increased with decreasing frequency due to the surface/interface states (N[Formula: see text]) which depend on the relaxation time and the frequency of the signal. The voltage, dependent profiles of N[Formula: see text] and series resistance (R[Formula: see text]) were obtained from the methods of high-low frequency capacitance and Nicollian and Brews, respectively. The obtained values of N[Formula: see text] and R[Formula: see text] were attributed to the use of cross-linked PVA-GO interlayer at the Au/n-Si interface.

Reductive electropolymerization of N-methyl-3-pyridylethynyl-porphyrins

2015 ◽  
Vol 51 (3) ◽  
pp. 519-521 ◽  
Author(s):  
Sung-Chou Huang ◽  
Ching-Yao Lin
Keyword(s):  
Cyclic Voltammetry ◽  
Ir Spectroscopy ◽  
Theoretical Calculations ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

The first reductive electropolymerization of porphyrins was studied by cyclic voltammetry, UV-visible and FT-IR spectroscopy, and theoretical calculations.

Monitoring of oxidation behavior in mineral base oil additized with biomass derived antioxidants using FT-IR spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (122) ◽  
pp. 101089-101100 ◽  
Author(s):  
Imtiaz Ahmad ◽  
Jan Ullah ◽  
Muhammad Ishaq ◽  
Hizbullah Khan ◽  
Kashif Gul ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Rice Husk ◽  
Oxidation Behavior ◽  
Methanolic Extract ◽  
Base Oil ◽  
Saw Dust ◽  
Ft Ir ◽  
Dust Extract ◽  
Ft Ir Spectroscopy ◽  
Mineral Base

The antioxidant potential of methanolic extract of rice husk and sawdust in mineral base oil is investigated by FT-IR spectroscopy during oxidation at 100 and 200 °C. The Rice husk extract is found to be more efficient than saw dust extract.

Preparation of Co3O4 Nanostructures via a Hydrothermal- Assisted Thermal Treatment Method by Using of New Precursors

2017 ◽  
Vol 36 (2) ◽  
pp. 107-112 ◽  
Author(s):  
Sousan Gholamrezaei ◽  
Masoud Salavati-Niasari ◽  
Hassan Hadadzadeh ◽  
Mohammad Taghi Behnamfar
Keyword(s):  
Thermal Treatment ◽  
Treatment Method ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
H Nmr ◽  
Ft Ir ◽  
Uv Visible ◽  
Co3o4 Nanostructures ◽  
Inorganic Precursors ◽  
Ft Ir Spectroscopy

AbstractCo3O4 nanostructures have been synthesized via a hydrothermal-assisted thermal treatment process. A new complex formulated as [Co(py)2(H2O)2(NO3)2] was synthesized, and then used to prepare Co3O4 nanostructures. Cubic phase of spinel Co3O4 nanostructures with particle size of about 39 nm could be produced after calcination of the Co(OH)2 materials prepared with hydrothermal method at 160 °C for 15 h. Using of inorganic precursors decreased the time and temperature of Co3O4 preparation. The effect of pH on the morphology of the product s synthesized by hydrothermal reactions was investigated. It was found that the best morphology was achieved on pH=8, where was not prepared any precipitation. In this method, we could decrease the reaction temperature in synthetic rout to fabricate Co3O4 nanostructures. Nanostructures were characterized by SEM, TEM, X-ray diffraction (XRD), UV–visible, Fourier transformed infrared (FT-IR) spectroscopy and Nuclear magnetic resonance (1H-NMR).

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