The efficiency of M (M = Li, Na, or Cs) doped
            <scp>CdS</scp>
            nanomaterials in optoelectronic applications

Awad, M. A.; Shaban, Mohamed; Rabia, Mohamed

doi:10.1002/er.7640

Cited by 28 publications

(12 citation statements)

References 53 publications

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“…38 While the peaks extended to the FTIR is related to both electron transition and vibration process. 39 The enhancement in the optical absorption is accompanied by an enhancement in the optical bandgap, 40 this appears in Figure 5B. The bandgap values for PMT, roll-GO, and PMT/roll-GO nanomaterials are 2.38, 2.67, and 1.65 eV, respectively.…”

Section: Characterization Of the Prepared Nanocompositementioning

confidence: 84%

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

Rabia

Hadia

Farid

et al. 2022

Intl J of Energy Research

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This study provides hydrogen gas fuel as a renewable energy source. The production of H 2 was carried out through the photocatalytic decomposition of sewage water using highly efficient poly(m-toluidine) (PMT)/rolled graphene oxide (roll-GO) as photoelectrode. The preparation of PMT thin film was carried out on glass using the in situ electropolymerization reaction from an acid medium. Then, the roll-GO was deposited on this thin film using the casting method from the GO solution. The full characteristic analyses Fouriertransform infrared, X-ray diffraction, scanning electron microscope, transmitted electron microscope, and UV-Vis spectroscopy confirmed the chemical structural, morphological, and optical properties of the prepared nanomaterials. The morphology characteristic confirmed the formation of nanopores PMT, rolled GO, and rolled porous nanocomposite. The bandgap values for PMT, roll-GO, and PMT/roll-GO nanomaterials were 2.38, 2.67, and 1.65 eV, respectively. The hydrogen generation was carried out through the photoelectrode glass/PMT/roll-GO with a current density (J ph ) value of 0.08 mA.cm À2 at +1 V, with hydrogen moles of 10 μmole/h.cm À2 . The J ph values changed from 0.078 to 0.053 mA.cm À2 with changing the monochromatic light wavelengths from 390 to 636 nm, respectively. Moreover, the J ph values increased from 0.078 to 0.295 mA.cm À2 which is followed by an increase in the temperature from 20 C to 60 C, respectively. The thermodynamic parameters were calculated, in which the Ea, ΔS*, and ΔH* values were

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Section: Characterization Of the Prepared Nanocompositementioning

confidence: 84%

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

Rabia

Hadia

Farid

et al. 2022

Intl J of Energy Research

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“…This behavior reveals the great light sensing stability of the prepared photoelectrode. The slight changes in the J ph values could be negligible, as they could have originated from the effects of environmental gas, such as CO 2 or O 2 (active gases) adsorbed on the photodetector surface during the measurements [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

Photodetection Enhancement via Graphene Oxide Deposition on Poly 3-Methyl Aniline

et al. 2023

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A graphene oxide (GO)/poly 3-methyl aniline (P3MA) photodetector has been developed for light detection in a broad optical region: UV, Vis, and IR. The 3-methyl aniline was initially synthesized via radical polymerization using an acid medium, i.e., K2S2O8 oxidant. Consequently, the GO/P3MA composite was obtained through the adsorption of GO into the surface of P3MA. The chemical structure and optical properties of the prepared materials have been illustrated via XRD, FTIR, SEM, and TEM analysis. The absorbance measurements demonstrate good optical properties in the UV, Vis, and near-IR regions, although a decrease in the bandgap from 2.4 to 1.6 eV after the composite formation was located. The current density (Jph) varies between 0.29 and 0.68 mA·cm−2 (at 2.0 V) under dark and light, respectively. The photodetector has been tested using on/off chopped light at a low potential, in which the produced Jph values decrease from 0.14 to 0.04 µA·cm−2, respectively. The GO/P3MA photodetector exhibits excellent R (and D) values of 4 and 2.7 mA·W−1 (0.90 × 109 and 0.60 × 109 Jones) in the UV (340 nm) and IR (730 nm) regions, respectively. The R and D values obtained here make the prepared photodetector a promising candidate for future light detection instruments.

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“…This E a depends on the rate of collisions (k is the rate constant) and temperature values in Kelvin (T) using the universal gas constant (R) and Arrhenius constant (A) as the standard constant. From the E a value, the initiator temperature for starting the splitting reaction is determined [58][59][60]. E a values are obtained from slope of ln J ph versus 1/T as shown in Figure 6c.…”

Section: Ipce =mentioning

confidence: 99%

Converting Sewage Water into H2 Fuel Gas Using Cu/CuO Nanoporous Photocatalytic Electrodes

et al. 2022

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This work reports on H2 fuel generation from sewage water using Cu/CuO nanoporous (NP) electrodes. This is a novel concept for converting contaminated water into H2 fuel. The preparation of Cu/CuO NP was achieved using a simple thermal combustion process of Cu metallic foil at 550 °C for 1 h. The Cu/CuO surface consists of island-like structures, with an inter-distance of 100 nm. Each island has a highly porous surface with a pore diameter of about 250 nm. X-ray diffraction (XRD) confirmed the formation of monoclinic Cu/CuO NP material with a crystallite size of 89 nm. The prepared Cu/CuO photoelectrode was applied for H2 generation from sewage water achieving an incident to photon conversion efficiency (IPCE) of 14.6%. Further, the effects of light intensity and wavelength on the photoelectrode performance were assessed. The current density (Jph) value increased from 2.17 to 4.7 mA·cm−2 upon raising the light power density from 50 to 100 mW·cm−2. Moreover, the enthalpy (ΔH*) and entropy (ΔS*) values of Cu/CuO electrode were determined as 9.519 KJ mol−1 and 180.4 JK−1·mol−1, respectively. The results obtained in the present study are very promising for solving the problem of energy in far regions by converting sewage water to H2 fuel.

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The efficiency of M (M = Li, Na, or Cs) doped CdS nanomaterials in optoelectronic applications

Cited by 28 publications

References 53 publications

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

Photodetection Enhancement via Graphene Oxide Deposition on Poly 3-Methyl Aniline

Converting Sewage Water into H2 Fuel Gas Using Cu/CuO Nanoporous Photocatalytic Electrodes

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