scholarly journals Optical properties for prepared polyaniline / Ferro fluid nano composites

2019 ◽  
Vol 14 (31) ◽  
pp. 161-168
Author(s):  
Salma M. Hassan
Keyword(s):  
Optical Properties ◽  
Energy Gap ◽  
Chemical Oxidation ◽  
Precipitation Method ◽  
Optical Energy Gap ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Fluid Concentration ◽  
Co Precipitation

Pure nano Ferro fluid was synthesized by chemical co-precipitation method. The composite of polyaniline with nano sized Ferro fluid was prepared by In-situ–chemical oxidation polymerization method with ammonium per sulphate as an oxidant in aqueous hydrochloric acid under constant stirring at room temperature. The optical properties, absorption, transmission, optical energy gap (Eg) and optical constant refractive index (n) have been investigated. The value of the Eg decreased with increasing Ferro fluid concentration.

scholarly journals Preparation of Poly O-Toluidine/Titanium Dioxide by In situ Chemical Oxidation Polymerization and Application for Solar Cell.

2021 ◽  
Vol 16 (31) ◽  
pp. 382-401
Author(s):  
Hayder A Hasan ◽  
Khalid I Ajeel
Keyword(s):  
Power Conversion ◽  
Chemical Oxidation ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Solvent Treatment ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Organic Pv

Various treatments on the PEDOT:PSS films were carried out to investigate it’s influence on the conductivity, morphology, transmittance and the corresponding impact of the performance of the organic photovoltaic devices based on the PCPDTBT:PCBM and P3HT:PCBM blends. These processing including doping PEDOT:PSS with DMF and ME solvents and exposing these films to the vapor of DMF and ME solvents, separately. A considerable enhancement of the conductivity and transmittance of PEDOT:PSS was observed after doping solvent into the PEDOT;PSS solution followed by solvent treatment through exposing these films to solvents environment. The best organic PV doped devices based on either PCPDTBT:PCBM or based on P3HT:PCBM with power conversion efficiency were 2.93% compared to 1.87% for the pristine  PV devices or 2.79% compared to 1.77%  for the pristine devices, respectively. The conductivity improvement was highly influenced by solvent treatment.

Highly efficient removal of chromium(VI) from aqueous solution using polyaniline/sepiolite nanofibers

2014 ◽  
Vol 70 (7) ◽  
pp. 1236-1243 ◽  
Author(s):  
Jun Chen ◽  
Xiaoqin Hong ◽  
Qingdong Xie ◽  
Diankai Li ◽  
Qianfeng Zhang
Keyword(s):  
Weight Ratio ◽  
Chemical Oxidation ◽  
Maximum Adsorption Capacity ◽  
In Situ Chemical Oxidation ◽  
Highly Efficient ◽  
Chromium Vi ◽  
Chemical Oxidation Polymerization ◽  
Pseudo Second Order ◽  
Sepiolite Nanofibers

Polyaniline/sepiolite (PANI/sepiolite) nanofibers were prepared by in situ chemical oxidation polymerization in the presence of sepiolite. The effect of aniline/sepiolite weight ratio on the nanostructure of PANI/sepiolite composites was investigated by field-emission scanning electron microscopy. The adsorption of Cr(VI) onto the PANI/sepiolite nanofibers was highly dependent on pH values. The pseudo-second-order and Langmuir isothermal models can well describe the adsorption kinetics and adsorption isotherm, respectively. The maximum adsorption capacity of the PANI/sepiolite nanofibers for Cr(VI) was up to 206.6 mg/g at 25 °C and increased with the increase in temperature. Desorption experiments indicated that PANI/sepiolite can be regenerated and reused for two consecutive cycles with no loss of its removal efficiency. PANI/sepiolite nanofibers can be used as a highly efficient and economically viable adsorbent for Cr(VI) removal due to their excellent adsorption characteristics.

scholarly journals Preparation of PANI Modified ZnO Composites via Different Methods: Structural, Morphological and Photocatalytic Properties

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1025
Author(s):  
Nazli Turkten ◽  
Yunus Karatas ◽  
Miray Bekbolet
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Oxidation ◽  
Emeraldine Base ◽  
Hybridization Method ◽  
X Ray ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Ft Ir ◽  
Polymerization Method

Polyaniline modified zinc oxide (PANI-ZnO) photocatalyst composites were synthesized by focusing on dissolution disadvantage of ZnO. In-situ chemical oxidation polymerization method was performed under neutral conditions (PANI-ES) whereas in hybridization method physical blending was applied using emeraldine base of polyaniline (PANI-EB). PANI-ZnO composites were prepared in various ratios of aniline (ANI) to ZnO as 1%, 3%, 6% and 9%. The alterations on the structural and morphological properties of PANI-ZnO composites were compared by Fourier Transform Infrared (FT-IR), Raman Spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy-Energy Dispersive X-ray Analysis Unit (SEM-EDAX) techniques. FT-IR and Raman spectroscopy confirmed the presence of PANI in all composites. SEM images revealed the morphological differences of PANI-ZnO composites based on PANI presence and preparation methods. Photocatalytic performances of PANI-ZnO specimens were investigated by following the degradation of methylene blue (MB) in aqueous medium under UVA irradiation. The effects of catalyst dose and initial dye concentration were also studied. MB degradation was followed by both decolorization extents and removal of aromatic fractions. PANI-ZnO composites expressed enhanced photocatalytic performance (~95% for both methods) as compared to sole ZnO (~87%). The hybridization method was found to be more efficient than the in-situ chemical oxidation polymerization method emphasizing the significance of the neutral medium.

Controllable construction of core–shell CuCo2S4@polypyrrole nanocomposites as advanced anode materials for high-performance sodium ion half/full batteries

2021 ◽  
Vol 5 (1) ◽  
pp. 293-303
Author(s):  
Qun Li ◽  
Qingze Jiao ◽  
Wei Zhou ◽  
Xueting Feng ◽  
Quan Shi ◽  
...  
Keyword(s):  
Anode Materials ◽  
High Performance ◽  
Rate Capability ◽  
Chemical Oxidation ◽  
Sodium Ion ◽  
Core Shell ◽  
Sodium Ion Batteries ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization

Core–shell CuCo2S4@polypyrrole (CS-CuCo2S4@PPy) nanocomposites, as advanced anode materials for sodium ion batteries with outstanding cycling stability and rate capability, were prepared by a facile solvothermal strategy and subsequent in-situ chemical oxidation polymerization.

Polyaniline-Attapulgite Composites Based on Ionic Liquid: Preparation and Characterization

2013 ◽  
Vol 803 ◽  
pp. 153-156 ◽  
Author(s):  
Hui Xia Feng ◽  
Jiao Chen ◽  
Lin Tan ◽  
Jian Qiang Zhang
Keyword(s):  
Ionic Liquid ◽  
Chemical Characterization ◽  
Chemical Oxidation ◽  
Imidazolium Chloride ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Before And After ◽  
Liquid Preparation

Using 1-methyl-3-alkylcarboxylic acid imidazolium chloride ([CMMICl) ionic liquid (IL) as synthetic environment, CMMIm-PANI and CMMIm-PANI@ATP composites were successfully prepared via in situ chemical oxidation polymerization. The chemical characterization of the material before and after ATP adding was performed by means of Fourier transform infrared spectroscopy (FTIR). The morphology of the coatings was observed employing scanning electron microscopy (SEM). The results are further indicated that PANI which coated on the surface of rodlike crystal ATP helped the formation of conductive path among ATP crystals which overlapped each other. The four probe conductivity apparatus was used to analyze the electronic properties of the composites. The conductivity of CMMIm-PANI@ATP and CMMIm-PANI are 10 S/cm and 1.8 S/cm respectively, which clearly showed that the introduction of ATP in composite makes the conductivity increased largely. In addition, thermogravimetric analysis shows that the thermal stability of CMMIm-PANI/ATP composites was enhanced and these can be attributed to the effect of coated ATP as barriers for the degradation of PANI.

scholarly journals Optical and A.C. Electrical Properties for Polypyrrole and Polypyrrole/Graphene (ppy/gn) Nanocomposites

2021 ◽  
Vol 19 (51) ◽  
pp. 72-78
Author(s):  
Fatima Mikdad Ahmed ◽  
Salma M. Hassan
Keyword(s):  
Electrical Properties ◽  
Energy Gap ◽  
In Situ Polymerization ◽  
Wave Length ◽  
Chemical Oxidation ◽  
Optical Energy Gap ◽  
Vis Spectroscopy ◽  
Order Of Magnitude ◽  
Graphene Nanoparticles

In this work, chemical oxidation was used to polymerize conjugated polymer "Polypyrrole" at room temperature Graphene nanoparticles were added by in situ-polymerization to get (PPY-GN) nano. Optical and Electrical properties were studied for the nanocomposites. optical properties of the nanocomposites were studied by UV-Vis spectroscopy at wavelength range (200 -800 nm). The result showed optical absorption spectra were normally determined and the result showed that the maximum absorbance wave length at 280nm and 590nm. The optical energy gap has been evaluated by direct transition and the value has decreased from (2.1 eV for pure PPy) to (1.3 eV for 5 %wt. of GN). The optical constants such as the band tail width ΔE was evaluated, the value of ΔE for pure PPy was (0.0949eV) while for 5 wt. % of GN it was (0.5156 eV), It has been observed that the Urbach tail for pure PPy was smaller than that for PPy/GN nanocomposites and it increase as GN concentration increases. The A.C electrical conductivity at range of frequency (103Hz-106Hz) was increased by increasing the frequency and GN concentration about four order of magnitude. The s value was about (0.653-0.962) which means that the mechanism of conductivity is correlated hopping mechanism (C. H. P.). The dielectric constant and dielectric lose were determined and found to decrease with increasing frequency.

Polyaniline Composites Using Three Different Acid as a Secondary Dopant: Preparation and Properties

2014 ◽  
Vol 1022 ◽  
pp. 22-25 ◽  
Author(s):  
Hong Hua Qi ◽  
Jiao Chen ◽  
Na Li Chen ◽  
Hui Xia Feng ◽  
Jian Hui Qiu
Keyword(s):  
Thermal Stability ◽  
Fourier Transform ◽  
Chemical Oxidation ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Secondary Doping ◽  
Polyaniline Composites ◽  
Thermal Stability Of ◽  
Better Than

In this paper, the preparation of PANI was investigated via in secondary doping in-situ chemical oxidation polymerization. We use NH2SO3H as dopant, and HP3O4, H2SO4or HCl as secondary dopant, respectively. The influencing of products conductivity was discussed about difference secondary dopant with changing concentration. The synthesized polymer composites are characterized by Fourier Transform Infrared Spectroscopy (FTIR) and four probe conductivity apparatus. The results show that in redoping process, the conductivity of PANI was 3.1746 S/cm when the concentration of HCl was 1.0 mol/L. Meanwhile, the thermal stability of PANI prepared with HP3O4or H2SO4as secondary dopant was better than HCl as secondary dopant.

Application of Au Nanoparticles–AgCl@Polypyrrole Hybrid Material to Amperometric Biosensor

2010 ◽  
Vol 92 ◽  
pp. 23-28 ◽  
Author(s):  
Xiang Zhong Ren ◽  
Li Zhang ◽  
Ying Kai Jiang ◽  
Pei Xin Zhang ◽  
Jian Hong Liu ◽  
...  
Keyword(s):  
Hybrid Material ◽  
Sodium Citrate ◽  
Au Nanoparticles ◽  
Chemical Oxidation ◽  
Glucose Biosensor ◽  
In Situ Chemical Oxidation ◽  
Highly Sensitive ◽  
Chemical Oxidation Polymerization ◽  
Infrared Spectrometer

AgCl@polypyrrole(PPy) nanocomposites were synthesized through in situ chemical oxidation polymerization by using poly(vinylpyrrolidane) (PVP) as dispersant, and some Au colloid were prepared by using KBH4 as reductant and sodium citrate as stabilizer, then the Au nanoparticles-AgCl@PPy hybrid material was formed by physical chemical reaction. Fourier transform infrared spectrometer (FTIR) and electron dispersive spectrometer (EDS) data suggested that the hybrid material were composed of Au, AgCl and PPy. An amperometric glucose biosensor was fabricated by adsorbing glucose oxidase (GOx) to an Au nanoparticles-AgCl@PPy hybrid material modified platinum electrode. The biosensor exhibited a super highly sensitive response to H2O2.

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