Gas Sensor Investigations through Adsorption of Toxic Gas Molecules on Single and Double Vacancy Graphene

Khudair, Salah Abdul Mahdi; Mohaimeed, Ameen Alwan

doi:10.14704/nq.2020.18.9.nq20221

Cited by 5 publications

(2 citation statements)

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“…[26] Therefore, it has been established that these thin films can function as solar cell coatings. Graphene, amongst others, has been used in gas sensors [27]. The improvement in electro-catalytic activity is what is responsible for the performance improvement.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Optical and D.C Electrical Characterization of (Pomegranate/PVA/TiO2) Ternary-Nanocomposites, As a Window to Improve Solar Cell Performance

Mohaimeed,

Bahaa H. Rabee

2023

IJNSN

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This paper aims to fabricate a nanocomposite made of polyvinyl alcohol, titanium dioxide, and natural pomegranate dye that can function as a sunlight sensor for solar cells. The thin films' structural, optical and electrical properties of (Pomegranate/PVA-TiO2) were studied. Images from (FE-SEM) taken at a concentration of 0.3 weight percent revealed the structural features of the material., the surface of the (Pomegranate/PVA-TiO2) nanocomposite films demonstrations many aggregations or chucks arbitrarily dispersed of (TiO2) with grain size (47-55) nm. With an increase in natural dye content, transmittance decreases. Pomegranate dye had the most prominent peaks, measuring (76%) at a concentration of 1 ml. All optical constants, including parameters such n and k for transparency and extinction, r and i for real and imaginary dielectric constants, and electrical conductivity for optical conductivity, rise with pomegranate dye concentration. The results showed that the electrical conductivity at a concentration of (4 ml) recorded the greatest possible (6.4×10-6) (Ω.cm)-1, and the activation energy decreased with increasing concentration of pomegranate dye (0.29-0.20) eV. Then a solar cell was prepared from SnO2/Si, and the films were deposited on it, and the efficiency results were. After being coated with (Pomegranate/PVA-TiO2) nanocomposites, the efficiency (ƞ) increased from (4.3-4.75). In addition to the increase in current (Isc) from 23 to 30 mA/cm2. The final results showed that the (Pomegranate/PVA-TiO2) nanocomposite possesses a high transmittance, low activation energy and is sensitive to light in the Vis and IR regions, making it suitable for optical application.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Optical and D.C Electrical Characterization of (Pomegranate/PVA/TiO2) Ternary-Nanocomposites, As a Window to Improve Solar Cell Performance

Mohaimeed,

Bahaa H. Rabee

2023

IJNSN

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“…This type of polymer might be one of the materials utilized in gas sensors [7]. Other materials, such as graphene, have been employed as gas sensors [8]. The optical characteristics of the manufactured(PVA-TiO2) films made of nanocomposites, such as transmission (T percent), absorption (A), reflectance(R), energy gap(Eg), coefficient of optical constants (α), refractive index (n), coefficient of extinction (k), and functions of optical dielectrics (εr, εi), are the focus of this research.…”

Section: Introductionmentioning

confidence: 99%

The Study the Influence of TiO2-Nanoparticles Doped in Polyvinyl Alcohol by Measuring Optical Properties of PVA Films

Mohaimeed

2022

IJN

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It was investigated how titanium dioxide nanoparticles affected the optical properties of polyvinyl alcohol. Polymer nanocomposites (PVA-TiO2) are created via stirring and casting. The results demonstrate that transmittance improves from 75% to 95% while titanium dioxide concentration enhances the absorbance of nanocomposites. Nanocomposite films made of PVA and TiO2 had reflectance values of 12 and 16 percent (weight percent=0.15 and 0.85%).The refractive index and coefficient of extinction rise with increasing density, and optical absorption and photon dispersion in the nanocomposite (PVA-TiO2) also rise as the concentration of titanium dioxide nanoparticles rises. Real dielectric (r) and imaginary dielectric I constants also rise as titanium dioxide nanoparticle concentration does. The results show that when the weight % of (TiO2) nanoparticles increased, the energy gap decreased from 3.32 to 2.23. Additionally, optical conductivity increased with the concentration of (TiO2) NPs. Nanocomposites of PVA and TiO2 are essential for optical applications.

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Influence of Berry dye on some properties of nanocomposite (PVA/TiO2) films

Mohaimeed

Rabee

2023

Opt Quant Electron

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Gas Sensor Investigations through Adsorption of Toxic Gas Molecules on Single and Double Vacancy Graphene

Cited by 5 publications

References 0 publications

Synthesis, Optical and D.C Electrical Characterization of (Pomegranate/PVA/TiO2) Ternary-Nanocomposites, As a Window to Improve Solar Cell Performance

Synthesis, Optical and D.C Electrical Characterization of (Pomegranate/PVA/TiO2) Ternary-Nanocomposites, As a Window to Improve Solar Cell Performance

The Study the Influence of TiO2-Nanoparticles Doped in Polyvinyl Alcohol by Measuring Optical Properties of PVA Films

Influence of Berry dye on some properties of nanocomposite (PVA/TiO2) films

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