The effect of rGO and chemical reduction under hydrazine on the structural, electrical and optical properties of nanostructured SnO2:F/rGO thin films

Sabzevar, P. Shayeghi; Bagheri–Mohagheghi, M. M.; Shirpay, A.

doi:10.1016/j.physb.2022.414310

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…To determine the energy gap from the absorption spectrum of the samples, rst the absorption values (A) that can be measured by the device were extracted and then the absorption coe cient (α) was calculated using Eq. 18 [44]:…”

Section: Uv-vis Spectroscopy Analysismentioning

confidence: 99%

Effect of physical and chemical activation methods on the structure, optical absorbance, band gap and urbach energy of porous activated carbon

Shahcheragh,

Bagheri-Mohagheghi,

Shirpay

2023

Preprint

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In this study, activated carbon was synthesized using the hard almond shell and palm kernel by physical activation with water vapor and chemical activation with phosphoric acid (H3PO4) methods. Then, the structural and optical properties of the activated carbons were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and UV-Vis spectroscopy. The SEM images showed that in the raw sample of hard almond shell and palm kernel, there is no porosity and pores, but in the activated carbon samples, porosity and structural defects were clearly observed. The XRD patterns showed that porous and amorphous structure was formed in all samples synthesized with physical and chemical activation. The results of FTIR spectra of activated carbons showed that there are carbon functional groups in all samples. The optical absorption coefficient (α) of the activated carbon with physical and chemical activation methods was obtained in order of 105-106. The band gap measurement of porous nanostructures showed that the activated carbon synthesized with chemical and physical activation methods have energy gap (Eg) in region = 2.80 eV to 3.48 eV and urbach energy (EU) in region = 120 to 210 meV.

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Section: Uv-vis Spectroscopy Analysismentioning

confidence: 99%

Effect of physical and chemical activation methods on the structure, optical absorbance, band gap and urbach energy of porous activated carbon

Shahcheragh,

Bagheri-Mohagheghi,

Shirpay

2023

Preprint

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“…Usually, the fabrication of rGO occurs among oxidized GO and graphite sheets. Sodium borohydride, I-ascorbic acid, hydrazine hydrate, and Hydrazine were mostly utilized as reducing agents to convert GO to rGO (Guex et al 2017;Zhang et al 2010;Chua and Pumera 2016;Sabzevar et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Effect of rGO/Au PMMA nanocomposite thin film thickness on photodetector devices

Ahmed

Sabbar

Al-Hiti

2023

Preprint

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Nanotechnology is a new expanding field of research including manipulating characteristics and nanoscale structures. Nanoparticles (NPs) have recently received a lot of attention in various applications such as biotechnological, fiber laser, optical sensors, etc. Here, we present a novel synthesis approach using reduced graphene oxide (rGO)/gold (Au) nano and embedding them into Polymethyl methacrylate (PMMA) using the laser-induced forward transfer (LIFT) technique to form three samples of different thicknesses. These samples were measured by atomic force microscopy (AFM) to be 200 nm, 230 nm, and 240 nm, respectively. The energy bandgap, Ultraviolet-visible (UV-Vis) spectrum, Scanning Electron Microscopy (SEM) image, and photodetector were used for the characterization of the samples. The highest specific quantum efficiency of 200 nm, 230, and 240 nm thin film samples was 141.5%, 171.86%, and 173%, at 890 nm; while directivity was realized at 1.15 × 1013 Jones, 1.7 × 1013 Jones, and 1.80 × 1013 Jones at 890 nm, respectively. The LIFT films improved responsivity (Rλ), directivity (D*), quantum efficiency (η%), and Current-Voltage (I-V) measurements.

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Surface Modification of Carbon Nanofiber with C20H38O11 Polymer by Spun Calcination Method

Kumar,

Kaur,

Kumari

et al. 2023

J Inorg Organomet Polym

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The effect of rGO and chemical reduction under hydrazine on the structural, electrical and optical properties of nanostructured SnO2:F/rGO thin films

Cited by 6 publications

References 34 publications

Effect of physical and chemical activation methods on the structure, optical absorbance, band gap and urbach energy of porous activated carbon

Effect of physical and chemical activation methods on the structure, optical absorbance, band gap and urbach energy of porous activated carbon

Effect of rGO/Au PMMA nanocomposite thin film thickness on photodetector devices

Surface Modification of Carbon Nanofiber with C20H38O11 Polymer by Spun Calcination Method

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